2014-08-20 14:21:11 -06:00
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/*
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2017-06-30 01:22:17 -06:00
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* This file is part of the MicroPython project, http://micropython.org/
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2014-08-20 14:21:11 -06:00
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <stddef.h>
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2015-01-01 14:13:30 -07:00
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#include "py/runtime.h"
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#include "py/gc.h"
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2015-10-30 17:03:58 -06:00
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#include "py/mphal.h"
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2014-08-20 14:21:11 -06:00
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#include "pin.h"
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#include "reg.h"
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#include "timer.h"
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typedef enum {
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CHANNEL_MODE_PWM_NORMAL,
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CHANNEL_MODE_PWM_INVERTED,
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CHANNEL_MODE_OC_TIMING,
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CHANNEL_MODE_OC_ACTIVE,
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CHANNEL_MODE_OC_INACTIVE,
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CHANNEL_MODE_OC_TOGGLE,
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// CHANNEL_MODE_OC_FORCED_ACTIVE,
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// CHANNEL_MODE_OC_FORCED_INACTIVE,
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CHANNEL_MODE_IC,
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} pyb_channel_mode;
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STATIC const struct {
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qstr name;
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uint32_t oc_mode;
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2014-09-21 23:40:42 -06:00
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} channel_mode_info[] = {
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2014-08-20 14:21:11 -06:00
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{ MP_QSTR_PWM, FTM_OCMODE_PWM1 },
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{ MP_QSTR_PWM_INVERTED, FTM_OCMODE_PWM2 },
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{ MP_QSTR_OC_TIMING, FTM_OCMODE_TIMING },
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{ MP_QSTR_OC_ACTIVE, FTM_OCMODE_ACTIVE },
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{ MP_QSTR_OC_INACTIVE, FTM_OCMODE_INACTIVE },
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{ MP_QSTR_OC_TOGGLE, FTM_OCMODE_TOGGLE },
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// { MP_QSTR_OC_FORCED_ACTIVE, FTM_OCMODE_FORCED_ACTIVE },
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// { MP_QSTR_OC_FORCED_INACTIVE, FTM_OCMODE_FORCED_INACTIVE },
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{ MP_QSTR_IC, 0 },
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};
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struct _pyb_timer_obj_t;
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typedef struct _pyb_timer_channel_obj_t {
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mp_obj_base_t base;
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struct _pyb_timer_obj_t *timer;
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uint8_t channel;
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uint8_t mode;
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mp_obj_t callback;
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struct _pyb_timer_channel_obj_t *next;
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} pyb_timer_channel_obj_t;
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typedef struct _pyb_timer_obj_t {
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mp_obj_base_t base;
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uint8_t tim_id;
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uint8_t irqn;
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mp_obj_t callback;
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FTM_HandleTypeDef ftm;
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pyb_timer_channel_obj_t *channel;
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} pyb_timer_obj_t;
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// Used to do callbacks to Python code on interrupt
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STATIC pyb_timer_obj_t *pyb_timer_obj_all[3];
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#define PYB_TIMER_OBJ_ALL_NUM MP_ARRAY_SIZE(pyb_timer_obj_all)
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STATIC mp_obj_t pyb_timer_deinit(mp_obj_t self_in);
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STATIC mp_obj_t pyb_timer_callback(mp_obj_t self_in, mp_obj_t callback);
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STATIC mp_obj_t pyb_timer_channel_callback(mp_obj_t self_in, mp_obj_t callback);
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void timer_init0(void) {
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for (uint i = 0; i < PYB_TIMER_OBJ_ALL_NUM; i++) {
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pyb_timer_obj_all[i] = NULL;
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}
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}
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// unregister all interrupt sources
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void timer_deinit(void) {
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for (uint i = 0; i < PYB_TIMER_OBJ_ALL_NUM; i++) {
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pyb_timer_obj_t *tim = pyb_timer_obj_all[i];
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if (tim != NULL) {
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pyb_timer_deinit(tim);
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}
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}
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}
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mp_uint_t get_prescaler_shift(mp_int_t prescaler) {
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mp_uint_t prescaler_shift;
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for (prescaler_shift = 0; prescaler_shift < 8; prescaler_shift++) {
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if (prescaler == (1 << prescaler_shift)) {
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return prescaler_shift;
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}
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}
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "prescaler must be a power of 2 between 1 and 128, not %d", prescaler));
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}
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/******************************************************************************/
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2017-06-30 01:22:17 -06:00
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/* MicroPython bindings */
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2014-08-20 14:21:11 -06:00
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2014-09-21 23:40:42 -06:00
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STATIC const mp_obj_type_t pyb_timer_channel_type;
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2014-09-26 10:04:05 -06:00
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// Helper function for determining the period used for calculating percent
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STATIC uint32_t compute_period(pyb_timer_obj_t *self) {
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// In center mode, compare == period corresponds to 100%
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// In edge mode, compare == (period + 1) corresponds to 100%
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FTM_TypeDef *FTMx = self->ftm.Instance;
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uint32_t period = (FTMx->MOD & 0xffff);
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if ((FTMx->SC & FTM_SC_CPWMS) == 0) {
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// Edge mode
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period++;
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}
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return period;
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}
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2014-09-25 08:44:10 -06:00
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// Helper function to compute PWM value from timer period and percent value.
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// 'val' can be an int or a float between 0 and 100 (out of range values are
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// clamped).
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2014-09-26 10:04:05 -06:00
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STATIC uint32_t compute_pwm_value_from_percent(uint32_t period, mp_obj_t percent_in) {
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2014-09-25 08:44:10 -06:00
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uint32_t cmp;
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if (0) {
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#if MICROPY_PY_BUILTINS_FLOAT
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2019-01-30 04:05:48 -07:00
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} else if (mp_obj_is_type(percent_in, &mp_type_float)) {
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2014-09-26 10:04:05 -06:00
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float percent = mp_obj_get_float(percent_in);
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if (percent <= 0.0) {
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cmp = 0;
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} else if (percent >= 100.0) {
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cmp = period;
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} else {
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cmp = percent / 100.0 * ((float)period);
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}
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2014-09-25 08:44:10 -06:00
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#endif
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} else {
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2014-09-26 10:04:05 -06:00
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mp_int_t percent = mp_obj_get_int(percent_in);
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if (percent <= 0) {
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cmp = 0;
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} else if (percent >= 100) {
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cmp = period;
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2014-09-25 08:44:10 -06:00
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} else {
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2014-09-26 10:04:05 -06:00
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cmp = ((uint32_t)percent * period) / 100;
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2014-09-25 08:44:10 -06:00
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}
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}
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return cmp;
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}
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2014-09-26 10:04:05 -06:00
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// Helper function to compute percentage from timer perion and PWM value.
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STATIC mp_obj_t compute_percent_from_pwm_value(uint32_t period, uint32_t cmp) {
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#if MICROPY_PY_BUILTINS_FLOAT
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float percent = (float)cmp * 100.0 / (float)period;
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2014-09-29 07:15:01 -06:00
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if (cmp >= period) {
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2014-09-26 10:04:05 -06:00
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percent = 100.0;
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} else {
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percent = (float)cmp * 100.0 / (float)period;
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}
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return mp_obj_new_float(percent);
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#else
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mp_int_t percent;
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2014-09-29 07:15:01 -06:00
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if (cmp >= period) {
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2014-09-26 10:04:05 -06:00
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percent = 100;
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} else {
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percent = cmp * 100 / period;
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}
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return mp_obj_new_int(percent);
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#endif
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}
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2015-04-09 16:56:15 -06:00
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STATIC void pyb_timer_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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2014-08-20 14:21:11 -06:00
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pyb_timer_obj_t *self = self_in;
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if (self->ftm.State == HAL_FTM_STATE_RESET) {
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2015-04-09 16:56:15 -06:00
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mp_printf(print, "Timer(%u)", self->tim_id);
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2014-08-20 14:21:11 -06:00
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} else {
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2015-04-09 16:56:15 -06:00
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mp_printf(print, "Timer(%u, prescaler=%u, period=%u, mode=%s)",
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2014-08-20 14:21:11 -06:00
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self->tim_id,
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2014-09-21 23:40:42 -06:00
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1 << (self->ftm.Instance->SC & 7),
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self->ftm.Instance->MOD & 0xffff,
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2014-09-26 10:04:05 -06:00
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self->ftm.Init.CounterMode == FTM_COUNTERMODE_UP ? "UP" : "CENTER");
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2014-08-20 14:21:11 -06:00
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}
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}
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/// \method init(*, freq, prescaler, period)
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/// Initialise the timer. Initialisation must be either by frequency (in Hz)
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/// or by prescaler and period:
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///
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/// tim.init(freq=100) # set the timer to trigger at 100Hz
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/// tim.init(prescaler=83, period=999) # set the prescaler and period directly
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///
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/// Keyword arguments:
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///
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/// - `freq` - specifies the periodic frequency of the timer. You migh also
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/// view this as the frequency with which the timer goes through
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/// one complete cycle.
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///
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/// - `prescaler` 1, 2, 4, 8 16 32, 64 or 128 - specifies the value to be loaded into the
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/// timer's prescaler. The timer clock source is divided by
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/// (`prescaler`) to arrive at the timer clock.
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///
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/// - `period` [0-0xffff] - Specifies the value to be loaded into the timer's
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/// Modulo Register (MOD). This determines the period of the timer (i.e.
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/// when the counter cycles). The timer counter will roll-over after
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2014-09-26 10:04:05 -06:00
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/// `period` timer clock cycles. In center mode, a compare register > 0x7fff
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/// doesn't seem to work properly, so keep this in mind.
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2014-08-20 14:21:11 -06:00
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///
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/// - `mode` can be one of:
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/// - `Timer.UP` - configures the timer to count from 0 to MOD (default)
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/// - `Timer.CENTER` - confgures the timer to count from 0 to MOD and
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/// then back down to 0.
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///
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/// - `callback` - as per Timer.callback()
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///
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/// You must either specify freq or both of period and prescaler.
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STATIC const mp_arg_t pyb_timer_init_args[] = {
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{ MP_QSTR_freq, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0xffffffff} },
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{ MP_QSTR_prescaler, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0xffffffff} },
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{ MP_QSTR_period, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0xffffffff} },
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{ MP_QSTR_mode, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = FTM_COUNTERMODE_UP} },
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{ MP_QSTR_callback, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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};
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#define PYB_TIMER_INIT_NUM_ARGS MP_ARRAY_SIZE(pyb_timer_init_args)
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STATIC mp_obj_t pyb_timer_init_helper(pyb_timer_obj_t *self, uint n_args, const mp_obj_t *args, mp_map_t *kw_args) {
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// parse args
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mp_arg_val_t vals[PYB_TIMER_INIT_NUM_ARGS];
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mp_arg_parse_all(n_args, args, kw_args, PYB_TIMER_INIT_NUM_ARGS, pyb_timer_init_args, vals);
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FTM_HandleTypeDef *ftm = &self->ftm;
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// set the TIM configuration values
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FTM_Base_InitTypeDef *init = &ftm->Init;
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if (vals[0].u_int != 0xffffffff) {
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// set prescaler and period from frequency
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if (vals[0].u_int == 0) {
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2017-08-08 22:40:45 -06:00
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mp_raise_ValueError("can't have 0 frequency");
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2014-08-20 14:21:11 -06:00
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}
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uint32_t period = MAX(1, F_BUS / vals[0].u_int);
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uint32_t prescaler_shift = 0;
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2014-09-26 10:04:05 -06:00
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while (period > 0xffff && prescaler_shift < 7) {
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2014-08-20 14:21:11 -06:00
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period >>= 1;
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prescaler_shift++;
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}
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2014-09-26 10:04:05 -06:00
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if (period > 0xffff) {
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period = 0xffff;
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2014-08-20 14:21:11 -06:00
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}
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init->PrescalerShift = prescaler_shift;
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2014-09-26 10:04:05 -06:00
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init->Period = period;
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2014-08-20 14:21:11 -06:00
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} else if (vals[1].u_int != 0xffffffff && vals[2].u_int != 0xffffffff) {
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// set prescaler and period directly
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init->PrescalerShift = get_prescaler_shift(vals[1].u_int);
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init->Period = vals[2].u_int;
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if (!IS_FTM_PERIOD(init->Period)) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "period must be between 0 and 65535, not %d", init->Period));
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}
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} else {
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2017-08-08 22:40:45 -06:00
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mp_raise_TypeError("must specify either freq, or prescaler and period");
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2014-08-20 14:21:11 -06:00
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}
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init->CounterMode = vals[3].u_int;
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if (!IS_FTM_COUNTERMODE(init->CounterMode)) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "invalid counter mode: %d", init->CounterMode));
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}
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// Currently core/mk20dx128.c sets SIM_SCGC6_FTM0, SIM_SCGC6_FTM1, SIM_SCGC3_FTM2
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// so we don't need to do it here.
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NVIC_SET_PRIORITY(self->irqn, 0xe); // next-to lowest priority
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HAL_FTM_Base_Init(ftm);
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if (vals[4].u_obj == mp_const_none) {
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HAL_FTM_Base_Start(ftm);
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} else {
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pyb_timer_callback(self, vals[4].u_obj);
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}
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return mp_const_none;
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}
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|
/// \classmethod \constructor(id, ...)
|
|
|
|
/// Construct a new timer object of the given id. If additional
|
|
|
|
/// arguments are given, then the timer is initialised by `init(...)`.
|
|
|
|
/// `id` can be 1 to 14, excluding 3.
|
2017-01-04 06:10:42 -07:00
|
|
|
STATIC mp_obj_t pyb_timer_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
2014-08-20 14:21:11 -06:00
|
|
|
// check arguments
|
|
|
|
mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
|
|
|
|
|
|
|
|
// create new Timer object
|
|
|
|
pyb_timer_obj_t *tim = m_new_obj(pyb_timer_obj_t);
|
|
|
|
memset(tim, 0, sizeof(*tim));
|
|
|
|
|
|
|
|
tim->base.type = &pyb_timer_type;
|
|
|
|
tim->callback = mp_const_none;
|
|
|
|
tim->channel = NULL;
|
|
|
|
|
|
|
|
// get FTM number
|
|
|
|
tim->tim_id = mp_obj_get_int(args[0]);
|
|
|
|
|
|
|
|
switch (tim->tim_id) {
|
|
|
|
case 0: tim->ftm.Instance = FTM0; tim->irqn = IRQ_FTM0; break;
|
|
|
|
case 1: tim->ftm.Instance = FTM1; tim->irqn = IRQ_FTM1; break;
|
|
|
|
case 2: tim->ftm.Instance = FTM2; tim->irqn = IRQ_FTM2; break;
|
|
|
|
default: nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Timer %d does not exist", tim->tim_id));
|
|
|
|
}
|
|
|
|
|
|
|
|
if (n_args > 1 || n_kw > 0) {
|
|
|
|
// start the peripheral
|
|
|
|
mp_map_t kw_args;
|
|
|
|
mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
|
|
|
|
pyb_timer_init_helper(tim, n_args - 1, args + 1, &kw_args);
|
|
|
|
}
|
|
|
|
|
|
|
|
// set the global variable for interrupt callbacks
|
|
|
|
if (tim->tim_id < PYB_TIMER_OBJ_ALL_NUM) {
|
|
|
|
pyb_timer_obj_all[tim->tim_id] = tim;
|
|
|
|
}
|
|
|
|
|
|
|
|
return (mp_obj_t)tim;
|
|
|
|
}
|
|
|
|
|
2017-08-29 18:59:58 -06:00
|
|
|
STATIC mp_obj_t pyb_timer_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
|
2014-08-20 14:21:11 -06:00
|
|
|
return pyb_timer_init_helper(args[0], n_args - 1, args + 1, kw_args);
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_timer_init_obj, 1, pyb_timer_init);
|
|
|
|
|
|
|
|
/// \method deinit()
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|
|
|
/// Deinitialises the timer.
|
|
|
|
///
|
|
|
|
/// Disables the callback (and the associated irq).
|
2014-09-21 23:40:42 -06:00
|
|
|
/// Disables any channel callbacks (and the associated irq).
|
2014-08-20 14:21:11 -06:00
|
|
|
/// Stops the timer, and disables the timer peripheral.
|
|
|
|
STATIC mp_obj_t pyb_timer_deinit(mp_obj_t self_in) {
|
|
|
|
pyb_timer_obj_t *self = self_in;
|
|
|
|
|
2014-09-21 23:40:42 -06:00
|
|
|
// Disable the base interrupt
|
2014-08-20 14:21:11 -06:00
|
|
|
pyb_timer_callback(self_in, mp_const_none);
|
|
|
|
|
|
|
|
pyb_timer_channel_obj_t *chan = self->channel;
|
|
|
|
self->channel = NULL;
|
|
|
|
|
|
|
|
// Disable the channel interrupts
|
|
|
|
while (chan != NULL) {
|
|
|
|
pyb_timer_channel_callback(chan, mp_const_none);
|
|
|
|
pyb_timer_channel_obj_t *prev_chan = chan;
|
|
|
|
chan = chan->next;
|
|
|
|
prev_chan->next = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
HAL_FTM_Base_DeInit(&self->ftm);
|
|
|
|
return mp_const_none;
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_timer_deinit_obj, pyb_timer_deinit);
|
|
|
|
|
2014-09-21 23:40:42 -06:00
|
|
|
/// \method channel(channel, mode, ...)
|
2014-08-20 14:21:11 -06:00
|
|
|
///
|
2014-09-21 23:40:42 -06:00
|
|
|
/// If only a channel number is passed, then a previously initialized channel
|
|
|
|
/// object is returned (or `None` if there is no previous channel).
|
2014-08-20 14:21:11 -06:00
|
|
|
///
|
|
|
|
/// Othwerwise, a TimerChannel object is initialized and returned.
|
|
|
|
///
|
|
|
|
/// Each channel can be configured to perform pwm, output compare, or
|
|
|
|
/// input capture. All channels share the same underlying timer, which means
|
|
|
|
/// that they share the same timer clock.
|
|
|
|
///
|
|
|
|
/// Keyword arguments:
|
|
|
|
///
|
|
|
|
/// - `mode` can be one of:
|
|
|
|
/// - `Timer.PWM` - configure the timer in PWM mode (active high).
|
|
|
|
/// - `Timer.PWM_INVERTED` - configure the timer in PWM mode (active low).
|
|
|
|
/// - `Timer.OC_TIMING` - indicates that no pin is driven.
|
|
|
|
/// - `Timer.OC_ACTIVE` - the pin will be made active when a compare
|
|
|
|
/// match occurs (active is determined by polarity)
|
|
|
|
/// - `Timer.OC_INACTIVE` - the pin will be made inactive when a compare
|
|
|
|
/// match occurs.
|
|
|
|
/// - `Timer.OC_TOGGLE` - the pin will be toggled when an compare match occurs.
|
|
|
|
/// - `Timer.IC` - configure the timer in Input Capture mode.
|
|
|
|
///
|
|
|
|
/// - `callback` - as per TimerChannel.callback()
|
|
|
|
///
|
|
|
|
/// - `pin` None (the default) or a Pin object. If specified (and not None)
|
|
|
|
/// this will cause the alternate function of the the indicated pin
|
|
|
|
/// to be configured for this timer channel. An error will be raised if
|
|
|
|
/// the pin doesn't support any alternate functions for this timer channel.
|
|
|
|
///
|
|
|
|
/// Keyword arguments for Timer.PWM modes:
|
|
|
|
///
|
2014-09-21 23:40:42 -06:00
|
|
|
/// - `pulse_width` - determines the initial pulse width value to use.
|
|
|
|
/// - `pulse_width_percent` - determines the initial pulse width percentage to use.
|
2014-08-20 14:21:11 -06:00
|
|
|
///
|
|
|
|
/// Keyword arguments for Timer.OC modes:
|
|
|
|
///
|
|
|
|
/// - `compare` - determines the initial value of the compare register.
|
|
|
|
///
|
|
|
|
/// - `polarity` can be one of:
|
|
|
|
/// - `Timer.HIGH` - output is active high
|
|
|
|
/// - `Timer.LOW` - output is acive low
|
|
|
|
///
|
|
|
|
/// Optional keyword arguments for Timer.IC modes:
|
|
|
|
///
|
|
|
|
/// - `polarity` can be one of:
|
|
|
|
/// - `Timer.RISING` - captures on rising edge.
|
|
|
|
/// - `Timer.FALLING` - captures on falling edge.
|
|
|
|
/// - `Timer.BOTH` - captures on both edges.
|
|
|
|
///
|
|
|
|
/// PWM Example:
|
|
|
|
///
|
|
|
|
/// timer = pyb.Timer(0, prescaler=128, period=37500, counter_mode=pyb.Timer.COUNTER_MODE_CENTER)
|
|
|
|
/// ch0 = t0.channel(0, pyb.Timer.PWM, pin=pyb.Pin.board.D22, pulse_width=(t0.period() + 1) // 4)
|
|
|
|
/// ch1 = t0.channel(1, pyb.Timer.PWM, pin=pyb.Pin.board.D23, pulse_width=(t0.period() + 1) // 2)
|
|
|
|
STATIC const mp_arg_t pyb_timer_channel_args[] = {
|
2014-09-21 23:40:42 -06:00
|
|
|
{ MP_QSTR_callback, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
|
|
|
|
{ MP_QSTR_pin, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
|
2014-09-25 08:44:10 -06:00
|
|
|
{ MP_QSTR_pulse_width, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
|
2014-09-21 23:40:42 -06:00
|
|
|
{ MP_QSTR_pulse_width_percent, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
|
|
|
|
{ MP_QSTR_compare, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
|
|
|
|
{ MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0xffffffff} },
|
2014-08-20 14:21:11 -06:00
|
|
|
};
|
|
|
|
#define PYB_TIMER_CHANNEL_NUM_ARGS MP_ARRAY_SIZE(pyb_timer_channel_args)
|
|
|
|
|
2017-08-29 18:59:58 -06:00
|
|
|
STATIC mp_obj_t pyb_timer_channel(size_t n_args, const mp_obj_t *args, mp_map_t *kw_args) {
|
2014-08-20 14:21:11 -06:00
|
|
|
pyb_timer_obj_t *self = args[0];
|
|
|
|
mp_int_t channel = mp_obj_get_int(args[1]);
|
|
|
|
|
|
|
|
if (channel < 0 || channel > 7) {
|
|
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Invalid channel (%d)", channel));
|
|
|
|
}
|
|
|
|
|
|
|
|
pyb_timer_channel_obj_t *chan = self->channel;
|
|
|
|
pyb_timer_channel_obj_t *prev_chan = NULL;
|
|
|
|
|
|
|
|
while (chan != NULL) {
|
|
|
|
if (chan->channel == channel) {
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
prev_chan = chan;
|
|
|
|
chan = chan->next;
|
|
|
|
}
|
2014-09-21 23:40:42 -06:00
|
|
|
|
|
|
|
// If only the channel number is given return the previously allocated
|
|
|
|
// channel (or None if no previous channel).
|
|
|
|
if (n_args == 2) {
|
2014-08-20 14:21:11 -06:00
|
|
|
if (chan) {
|
|
|
|
return chan;
|
|
|
|
}
|
|
|
|
return mp_const_none;
|
|
|
|
}
|
|
|
|
|
|
|
|
// If there was already a channel, then remove it from the list. Note that
|
|
|
|
// the order we do things here is important so as to appear atomic to
|
|
|
|
// the IRQ handler.
|
|
|
|
if (chan) {
|
|
|
|
// Turn off any IRQ associated with the channel.
|
|
|
|
pyb_timer_channel_callback(chan, mp_const_none);
|
|
|
|
|
|
|
|
// Unlink the channel from the list.
|
|
|
|
if (prev_chan) {
|
|
|
|
prev_chan->next = chan->next;
|
|
|
|
}
|
|
|
|
self->channel = chan->next;
|
|
|
|
chan->next = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Allocate and initialize a new channel
|
|
|
|
mp_arg_val_t vals[PYB_TIMER_CHANNEL_NUM_ARGS];
|
|
|
|
mp_arg_parse_all(n_args - 3, args + 3, kw_args, PYB_TIMER_CHANNEL_NUM_ARGS, pyb_timer_channel_args, vals);
|
|
|
|
|
|
|
|
chan = m_new_obj(pyb_timer_channel_obj_t);
|
|
|
|
memset(chan, 0, sizeof(*chan));
|
|
|
|
chan->base.type = &pyb_timer_channel_type;
|
|
|
|
chan->timer = self;
|
|
|
|
chan->channel = channel;
|
|
|
|
chan->mode = mp_obj_get_int(args[2]);
|
|
|
|
chan->callback = vals[0].u_obj;
|
|
|
|
|
|
|
|
mp_obj_t pin_obj = vals[1].u_obj;
|
|
|
|
if (pin_obj != mp_const_none) {
|
2019-01-30 04:05:48 -07:00
|
|
|
if (!mp_obj_is_type(pin_obj, &pin_type)) {
|
2017-08-08 22:40:45 -06:00
|
|
|
mp_raise_ValueError("pin argument needs to be be a Pin type");
|
2014-08-20 14:21:11 -06:00
|
|
|
}
|
|
|
|
const pin_obj_t *pin = pin_obj;
|
|
|
|
const pin_af_obj_t *af = pin_find_af(pin, AF_FN_FTM, self->tim_id);
|
|
|
|
if (af == NULL) {
|
|
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "pin %s doesn't have an af for TIM%d", qstr_str(pin->name), self->tim_id));
|
|
|
|
}
|
|
|
|
// pin.init(mode=AF_PP, af=idx)
|
|
|
|
const mp_obj_t args[6] = {
|
|
|
|
(mp_obj_t)&pin_init_obj,
|
|
|
|
pin_obj,
|
|
|
|
MP_OBJ_NEW_QSTR(MP_QSTR_mode), MP_OBJ_NEW_SMALL_INT(GPIO_MODE_AF_PP),
|
|
|
|
MP_OBJ_NEW_QSTR(MP_QSTR_af), MP_OBJ_NEW_SMALL_INT(af->idx)
|
|
|
|
};
|
|
|
|
mp_call_method_n_kw(0, 2, args);
|
|
|
|
}
|
|
|
|
|
|
|
|
// Link the channel to the timer before we turn the channel on.
|
|
|
|
// Note that this needs to appear atomic to the IRQ handler (the write
|
|
|
|
// to self->channel is atomic, so we're good, but I thought I'd mention
|
|
|
|
// in case this was ever changed in the future).
|
|
|
|
chan->next = self->channel;
|
|
|
|
self->channel = chan;
|
|
|
|
|
|
|
|
switch (chan->mode) {
|
|
|
|
|
|
|
|
case CHANNEL_MODE_PWM_NORMAL:
|
|
|
|
case CHANNEL_MODE_PWM_INVERTED: {
|
|
|
|
FTM_OC_InitTypeDef oc_config;
|
2014-09-21 23:40:42 -06:00
|
|
|
oc_config.OCMode = channel_mode_info[chan->mode].oc_mode;
|
2014-09-25 08:44:10 -06:00
|
|
|
if (vals[3].u_obj != mp_const_none) {
|
2014-09-21 23:40:42 -06:00
|
|
|
// pulse width ratio given
|
2014-09-26 10:04:05 -06:00
|
|
|
uint32_t period = compute_period(self);
|
2014-09-25 08:44:10 -06:00
|
|
|
oc_config.Pulse = compute_pwm_value_from_percent(period, vals[3].u_obj);
|
2014-09-21 23:40:42 -06:00
|
|
|
} else {
|
2014-09-25 08:44:10 -06:00
|
|
|
// use absolute pulse width value (defaults to 0 if nothing given)
|
|
|
|
oc_config.Pulse = vals[2].u_int;
|
2014-09-21 23:40:42 -06:00
|
|
|
}
|
2014-09-26 10:04:05 -06:00
|
|
|
oc_config.OCPolarity = FTM_OCPOLARITY_HIGH;
|
2014-08-20 14:21:11 -06:00
|
|
|
|
|
|
|
HAL_FTM_PWM_ConfigChannel(&self->ftm, &oc_config, channel);
|
|
|
|
if (chan->callback == mp_const_none) {
|
|
|
|
HAL_FTM_PWM_Start(&self->ftm, channel);
|
|
|
|
} else {
|
|
|
|
HAL_FTM_PWM_Start_IT(&self->ftm, channel);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
case CHANNEL_MODE_OC_TIMING:
|
|
|
|
case CHANNEL_MODE_OC_ACTIVE:
|
|
|
|
case CHANNEL_MODE_OC_INACTIVE:
|
|
|
|
case CHANNEL_MODE_OC_TOGGLE: {
|
|
|
|
FTM_OC_InitTypeDef oc_config;
|
2014-09-21 23:40:42 -06:00
|
|
|
oc_config.OCMode = channel_mode_info[chan->mode].oc_mode;
|
|
|
|
oc_config.Pulse = vals[4].u_int;
|
|
|
|
oc_config.OCPolarity = vals[5].u_int;
|
2014-08-20 14:21:11 -06:00
|
|
|
if (oc_config.OCPolarity == 0xffffffff) {
|
|
|
|
oc_config.OCPolarity = FTM_OCPOLARITY_HIGH;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!IS_FTM_OC_POLARITY(oc_config.OCPolarity)) {
|
|
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Invalid polarity (%d)", oc_config.OCPolarity));
|
|
|
|
}
|
|
|
|
HAL_FTM_OC_ConfigChannel(&self->ftm, &oc_config, channel);
|
|
|
|
if (chan->callback == mp_const_none) {
|
|
|
|
HAL_FTM_OC_Start(&self->ftm, channel);
|
|
|
|
} else {
|
|
|
|
HAL_FTM_OC_Start_IT(&self->ftm, channel);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
case CHANNEL_MODE_IC: {
|
|
|
|
FTM_IC_InitTypeDef ic_config;
|
|
|
|
|
2014-09-21 23:40:42 -06:00
|
|
|
ic_config.ICPolarity = vals[5].u_int;
|
2014-08-20 14:21:11 -06:00
|
|
|
if (ic_config.ICPolarity == 0xffffffff) {
|
|
|
|
ic_config.ICPolarity = FTM_ICPOLARITY_RISING;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!IS_FTM_IC_POLARITY(ic_config.ICPolarity)) {
|
|
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Invalid polarity (%d)", ic_config.ICPolarity));
|
|
|
|
}
|
|
|
|
HAL_FTM_IC_ConfigChannel(&self->ftm, &ic_config, chan->channel);
|
|
|
|
if (chan->callback == mp_const_none) {
|
|
|
|
HAL_FTM_IC_Start(&self->ftm, channel);
|
|
|
|
} else {
|
|
|
|
HAL_FTM_IC_Start_IT(&self->ftm, channel);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
default:
|
|
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Invalid mode (%d)", chan->mode));
|
|
|
|
}
|
2014-09-21 23:40:42 -06:00
|
|
|
|
2014-08-20 14:21:11 -06:00
|
|
|
return chan;
|
|
|
|
}
|
2014-09-21 23:40:42 -06:00
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(pyb_timer_channel_obj, 2, pyb_timer_channel);
|
2014-08-20 14:21:11 -06:00
|
|
|
|
|
|
|
/// \method counter([value])
|
|
|
|
/// Get or set the timer counter.
|
2017-08-29 18:59:58 -06:00
|
|
|
STATIC mp_obj_t pyb_timer_counter(size_t n_args, const mp_obj_t *args) {
|
2014-08-20 14:21:11 -06:00
|
|
|
pyb_timer_obj_t *self = args[0];
|
|
|
|
if (n_args == 1) {
|
|
|
|
// get
|
|
|
|
return mp_obj_new_int(self->ftm.Instance->CNT);
|
|
|
|
}
|
|
|
|
// set - In order to write to CNT we need to set CNTIN
|
|
|
|
self->ftm.Instance->CNTIN = mp_obj_get_int(args[1]);
|
|
|
|
self->ftm.Instance->CNT = 0; // write any value to load CNTIN into CNT
|
|
|
|
return mp_const_none;
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_timer_counter_obj, 1, 2, pyb_timer_counter);
|
|
|
|
|
|
|
|
/// \method prescaler([value])
|
|
|
|
/// Get or set the prescaler for the timer.
|
2017-08-29 18:59:58 -06:00
|
|
|
STATIC mp_obj_t pyb_timer_prescaler(size_t n_args, const mp_obj_t *args) {
|
2014-08-20 14:21:11 -06:00
|
|
|
pyb_timer_obj_t *self = args[0];
|
|
|
|
if (n_args == 1) {
|
|
|
|
// get
|
|
|
|
return mp_obj_new_int(1 << (self->ftm.Instance->SC & 7));
|
|
|
|
}
|
|
|
|
|
|
|
|
// set
|
|
|
|
mp_uint_t prescaler_shift = get_prescaler_shift(mp_obj_get_int(args[1]));
|
|
|
|
|
|
|
|
mp_uint_t sc = self->ftm.Instance->SC;
|
|
|
|
sc &= ~7;
|
|
|
|
sc |= FTM_SC_PS(prescaler_shift);
|
|
|
|
self->ftm.Instance->SC = sc;
|
|
|
|
|
|
|
|
return mp_const_none;
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_timer_prescaler_obj, 1, 2, pyb_timer_prescaler);
|
|
|
|
|
|
|
|
/// \method period([value])
|
|
|
|
/// Get or set the period of the timer.
|
2017-08-29 18:59:58 -06:00
|
|
|
STATIC mp_obj_t pyb_timer_period(size_t n_args, const mp_obj_t *args) {
|
2014-08-20 14:21:11 -06:00
|
|
|
pyb_timer_obj_t *self = args[0];
|
|
|
|
if (n_args == 1) {
|
|
|
|
// get
|
|
|
|
return mp_obj_new_int(self->ftm.Instance->MOD & 0xffff);
|
|
|
|
}
|
|
|
|
|
|
|
|
// set
|
|
|
|
mp_int_t period = mp_obj_get_int(args[1]) & 0xffff;
|
|
|
|
self->ftm.Instance->CNT = 0;
|
|
|
|
self->ftm.Instance->MOD = period;
|
|
|
|
return mp_const_none;
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_timer_period_obj, 1, 2, pyb_timer_period);
|
|
|
|
|
|
|
|
/// \method callback(fun)
|
|
|
|
/// Set the function to be called when the timer triggers.
|
|
|
|
/// `fun` is passed 1 argument, the timer object.
|
|
|
|
/// If `fun` is `None` then the callback will be disabled.
|
|
|
|
STATIC mp_obj_t pyb_timer_callback(mp_obj_t self_in, mp_obj_t callback) {
|
|
|
|
pyb_timer_obj_t *self = self_in;
|
|
|
|
if (callback == mp_const_none) {
|
|
|
|
// stop interrupt (but not timer)
|
|
|
|
__HAL_FTM_DISABLE_TOF_IT(&self->ftm);
|
|
|
|
self->callback = mp_const_none;
|
|
|
|
} else if (mp_obj_is_callable(callback)) {
|
|
|
|
self->callback = callback;
|
|
|
|
HAL_NVIC_EnableIRQ(self->irqn);
|
|
|
|
// start timer, so that it interrupts on overflow
|
|
|
|
HAL_FTM_Base_Start_IT(&self->ftm);
|
|
|
|
} else {
|
2017-08-08 22:40:45 -06:00
|
|
|
mp_raise_ValueError("callback must be None or a callable object");
|
2014-08-20 14:21:11 -06:00
|
|
|
}
|
|
|
|
return mp_const_none;
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_timer_callback_obj, pyb_timer_callback);
|
|
|
|
|
|
|
|
#if MICROPY_TIMER_REG
|
|
|
|
reg_t timer_reg[] = {
|
|
|
|
REG_ENTRY(FTM_TypeDef, SC),
|
|
|
|
REG_ENTRY(FTM_TypeDef, CNT),
|
|
|
|
REG_ENTRY(FTM_TypeDef, MOD),
|
|
|
|
REG_ENTRY(FTM_TypeDef, CNTIN),
|
|
|
|
REG_ENTRY(FTM_TypeDef, STATUS),
|
|
|
|
REG_ENTRY(FTM_TypeDef, MODE),
|
|
|
|
REG_ENTRY(FTM_TypeDef, SYNC),
|
|
|
|
REG_ENTRY(FTM_TypeDef, OUTINIT),
|
|
|
|
REG_ENTRY(FTM_TypeDef, OUTMASK),
|
|
|
|
REG_ENTRY(FTM_TypeDef, COMBINE),
|
|
|
|
REG_ENTRY(FTM_TypeDef, DEADTIME),
|
|
|
|
REG_ENTRY(FTM_TypeDef, EXTTRIG),
|
|
|
|
REG_ENTRY(FTM_TypeDef, POL),
|
|
|
|
REG_ENTRY(FTM_TypeDef, FMS),
|
|
|
|
REG_ENTRY(FTM_TypeDef, FILTER),
|
|
|
|
REG_ENTRY(FTM_TypeDef, FLTCTRL),
|
|
|
|
REG_ENTRY(FTM_TypeDef, QDCTRL),
|
|
|
|
REG_ENTRY(FTM_TypeDef, CONF),
|
|
|
|
REG_ENTRY(FTM_TypeDef, FLTPOL),
|
|
|
|
REG_ENTRY(FTM_TypeDef, SYNCONF),
|
|
|
|
REG_ENTRY(FTM_TypeDef, INVCTRL),
|
|
|
|
REG_ENTRY(FTM_TypeDef, SWOCTRL),
|
|
|
|
REG_ENTRY(FTM_TypeDef, PWMLOAD),
|
|
|
|
};
|
|
|
|
|
|
|
|
mp_obj_t pyb_timer_reg(uint n_args, const mp_obj_t *args) {
|
|
|
|
pyb_timer_obj_t *self = args[0];
|
|
|
|
return reg_cmd(self->ftm.Instance, timer_reg, MP_ARRAY_SIZE(timer_reg), n_args - 1, args + 1);
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_timer_reg_obj, 1, 3, pyb_timer_reg);
|
|
|
|
#endif // MICROPY_TIMER_REG
|
|
|
|
|
2017-08-21 05:34:23 -06:00
|
|
|
STATIC const mp_rom_map_elem_t pyb_timer_locals_dict_table[] = {
|
2014-08-20 14:21:11 -06:00
|
|
|
// instance methods
|
2017-08-21 05:34:23 -06:00
|
|
|
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&pyb_timer_init_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&pyb_timer_deinit_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_channel), MP_ROM_PTR(&pyb_timer_channel_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_counter), MP_ROM_PTR(&pyb_timer_counter_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_prescaler), MP_ROM_PTR(&pyb_timer_prescaler_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_period), MP_ROM_PTR(&pyb_timer_period_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_callback), MP_ROM_PTR(&pyb_timer_callback_obj) },
|
2014-08-20 14:21:11 -06:00
|
|
|
#if MICROPY_TIMER_REG
|
2017-08-21 05:34:23 -06:00
|
|
|
{ MP_ROM_QSTR(MP_QSTR_reg), MP_ROM_PTR(&pyb_timer_reg_obj) },
|
2014-08-20 14:21:11 -06:00
|
|
|
#endif
|
2017-08-21 05:34:23 -06:00
|
|
|
{ MP_ROM_QSTR(MP_QSTR_UP), MP_ROM_INT(FTM_COUNTERMODE_UP) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_CENTER), MP_ROM_INT(FTM_COUNTERMODE_CENTER) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_PWM), MP_ROM_INT(CHANNEL_MODE_PWM_NORMAL) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_PWM_INVERTED), MP_ROM_INT(CHANNEL_MODE_PWM_INVERTED) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_OC_TIMING), MP_ROM_INT(CHANNEL_MODE_OC_TIMING) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_OC_ACTIVE), MP_ROM_INT(CHANNEL_MODE_OC_ACTIVE) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_OC_INACTIVE), MP_ROM_INT(CHANNEL_MODE_OC_INACTIVE) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_OC_TOGGLE), MP_ROM_INT(CHANNEL_MODE_OC_TOGGLE) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_IC), MP_ROM_INT(CHANNEL_MODE_IC) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_HIGH), MP_ROM_INT(FTM_OCPOLARITY_HIGH) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_LOW), MP_ROM_INT(FTM_OCPOLARITY_LOW) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_RISING), MP_ROM_INT(FTM_ICPOLARITY_RISING) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_FALLING), MP_ROM_INT(FTM_ICPOLARITY_FALLING) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_BOTH), MP_ROM_INT(FTM_ICPOLARITY_BOTH) },
|
2014-08-20 14:21:11 -06:00
|
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(pyb_timer_locals_dict, pyb_timer_locals_dict_table);
|
|
|
|
|
|
|
|
const mp_obj_type_t pyb_timer_type = {
|
|
|
|
{ &mp_type_type },
|
|
|
|
.name = MP_QSTR_Timer,
|
|
|
|
.print = pyb_timer_print,
|
|
|
|
.make_new = pyb_timer_make_new,
|
|
|
|
.locals_dict = (mp_obj_t)&pyb_timer_locals_dict,
|
|
|
|
};
|
|
|
|
|
|
|
|
/// \moduleref pyb
|
|
|
|
/// \class TimerChannel - setup a channel for a timer.
|
|
|
|
///
|
|
|
|
/// Timer channels are used to generate/capture a signal using a timer.
|
|
|
|
///
|
|
|
|
/// TimerChannel objects are created using the Timer.channel() method.
|
2015-04-09 16:56:15 -06:00
|
|
|
STATIC void pyb_timer_channel_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
|
2014-08-20 14:21:11 -06:00
|
|
|
pyb_timer_channel_obj_t *self = self_in;
|
|
|
|
|
2015-04-09 16:56:15 -06:00
|
|
|
mp_printf(print, "TimerChannel(timer=%u, channel=%u, mode=%s)",
|
2014-08-20 14:21:11 -06:00
|
|
|
self->timer->tim_id,
|
|
|
|
self->channel,
|
2014-09-21 23:40:42 -06:00
|
|
|
qstr_str(channel_mode_info[self->mode].name));
|
2014-08-20 14:21:11 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/// \method capture([value])
|
|
|
|
/// Get or set the capture value associated with a channel.
|
|
|
|
/// capture, compare, and pulse_width are all aliases for the same function.
|
|
|
|
/// capture is the logical name to use when the channel is in input capture mode.
|
|
|
|
|
|
|
|
/// \method compare([value])
|
|
|
|
/// Get or set the compare value associated with a channel.
|
|
|
|
/// capture, compare, and pulse_width are all aliases for the same function.
|
|
|
|
/// compare is the logical name to use when the channel is in output compare mode.
|
|
|
|
|
|
|
|
/// \method pulse_width([value])
|
|
|
|
/// Get or set the pulse width value associated with a channel.
|
|
|
|
/// capture, compare, and pulse_width are all aliases for the same function.
|
|
|
|
/// pulse_width is the logical name to use when the channel is in PWM mode.
|
2014-09-26 10:04:05 -06:00
|
|
|
///
|
|
|
|
/// In edge aligned mode, a pulse_width of `period + 1` corresponds to a duty cycle of 100%
|
|
|
|
/// In center aligned mode, a pulse width of `period` corresponds to a duty cycle of 100%
|
2017-08-29 18:59:58 -06:00
|
|
|
STATIC mp_obj_t pyb_timer_channel_capture_compare(size_t n_args, const mp_obj_t *args) {
|
2014-08-20 14:21:11 -06:00
|
|
|
pyb_timer_channel_obj_t *self = args[0];
|
|
|
|
FTM_TypeDef *FTMx = self->timer->ftm.Instance;
|
|
|
|
if (n_args == 1) {
|
|
|
|
// get
|
2014-09-21 23:40:42 -06:00
|
|
|
return mp_obj_new_int(FTMx->channel[self->channel].CV & 0xffff);
|
2014-08-20 14:21:11 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
mp_int_t pw = mp_obj_get_int(args[1]);
|
|
|
|
|
|
|
|
// set
|
2014-09-21 23:40:42 -06:00
|
|
|
FTMx->channel[self->channel].CV = pw & 0xffff;
|
2014-08-20 14:21:11 -06:00
|
|
|
return mp_const_none;
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_timer_channel_capture_compare_obj, 1, 2, pyb_timer_channel_capture_compare);
|
|
|
|
|
2014-09-21 23:40:42 -06:00
|
|
|
/// \method pulse_width_percent([value])
|
2014-09-25 08:44:10 -06:00
|
|
|
/// Get or set the pulse width percentage associated with a channel. The value
|
|
|
|
/// is a number between 0 and 100 and sets the percentage of the timer period
|
|
|
|
/// for which the pulse is active. The value can be an integer or
|
|
|
|
/// floating-point number for more accuracy. For example, a value of 25 gives
|
|
|
|
/// a duty cycle of 25%.
|
2017-08-29 18:59:58 -06:00
|
|
|
STATIC mp_obj_t pyb_timer_channel_pulse_width_percent(size_t n_args, const mp_obj_t *args) {
|
2014-09-21 23:40:42 -06:00
|
|
|
pyb_timer_channel_obj_t *self = args[0];
|
|
|
|
FTM_TypeDef *FTMx = self->timer->ftm.Instance;
|
2014-09-26 10:04:05 -06:00
|
|
|
uint32_t period = compute_period(self->timer);
|
2014-09-21 23:40:42 -06:00
|
|
|
if (n_args == 1) {
|
|
|
|
// get
|
|
|
|
uint32_t cmp = FTMx->channel[self->channel].CV & 0xffff;
|
2014-09-26 10:04:05 -06:00
|
|
|
return compute_percent_from_pwm_value(period, cmp);
|
2014-09-21 23:40:42 -06:00
|
|
|
} else {
|
|
|
|
// set
|
2014-09-25 08:44:10 -06:00
|
|
|
uint32_t cmp = compute_pwm_value_from_percent(period, args[1]);
|
2014-09-21 23:40:42 -06:00
|
|
|
FTMx->channel[self->channel].CV = cmp & 0xffff;
|
|
|
|
return mp_const_none;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_timer_channel_pulse_width_percent_obj, 1, 2, pyb_timer_channel_pulse_width_percent);
|
|
|
|
|
2014-08-20 14:21:11 -06:00
|
|
|
/// \method callback(fun)
|
|
|
|
/// Set the function to be called when the timer channel triggers.
|
|
|
|
/// `fun` is passed 1 argument, the timer object.
|
|
|
|
/// If `fun` is `None` then the callback will be disabled.
|
|
|
|
STATIC mp_obj_t pyb_timer_channel_callback(mp_obj_t self_in, mp_obj_t callback) {
|
|
|
|
pyb_timer_channel_obj_t *self = self_in;
|
|
|
|
if (callback == mp_const_none) {
|
|
|
|
// stop interrupt (but not timer)
|
|
|
|
__HAL_FTM_DISABLE_CH_IT(&self->timer->ftm, self->channel);
|
|
|
|
self->callback = mp_const_none;
|
|
|
|
} else if (mp_obj_is_callable(callback)) {
|
|
|
|
self->callback = callback;
|
|
|
|
HAL_NVIC_EnableIRQ(self->timer->irqn);
|
|
|
|
// start timer, so that it interrupts on overflow
|
|
|
|
switch (self->mode) {
|
|
|
|
case CHANNEL_MODE_PWM_NORMAL:
|
|
|
|
case CHANNEL_MODE_PWM_INVERTED:
|
|
|
|
HAL_FTM_PWM_Start_IT(&self->timer->ftm, self->channel);
|
|
|
|
break;
|
|
|
|
case CHANNEL_MODE_OC_TIMING:
|
|
|
|
case CHANNEL_MODE_OC_ACTIVE:
|
|
|
|
case CHANNEL_MODE_OC_INACTIVE:
|
|
|
|
case CHANNEL_MODE_OC_TOGGLE:
|
|
|
|
HAL_FTM_OC_Start_IT(&self->timer->ftm, self->channel);
|
|
|
|
break;
|
|
|
|
case CHANNEL_MODE_IC:
|
|
|
|
HAL_FTM_IC_Start_IT(&self->timer->ftm, self->channel);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
2017-08-08 22:40:45 -06:00
|
|
|
mp_raise_ValueError("callback must be None or a callable object");
|
2014-08-20 14:21:11 -06:00
|
|
|
}
|
|
|
|
return mp_const_none;
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_timer_channel_callback_obj, pyb_timer_channel_callback);
|
|
|
|
|
|
|
|
#if MICROPY_TIMER_REG
|
|
|
|
reg_t timer_channel_reg[] = {
|
|
|
|
REG_ENTRY(FTM_ChannelTypeDef, CSC),
|
|
|
|
REG_ENTRY(FTM_ChannelTypeDef, CV),
|
|
|
|
};
|
|
|
|
|
|
|
|
mp_obj_t pyb_timer_channel_reg(uint n_args, const mp_obj_t *args) {
|
|
|
|
pyb_timer_channel_obj_t *self = args[0];
|
|
|
|
return reg_cmd(&self->timer->ftm.Instance->channel[self->channel],
|
|
|
|
timer_channel_reg, MP_ARRAY_SIZE(timer_channel_reg),
|
|
|
|
n_args - 1, args + 1);
|
|
|
|
}
|
|
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_timer_channel_reg_obj, 1, 3, pyb_timer_channel_reg);
|
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#endif
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2017-08-21 05:34:23 -06:00
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STATIC const mp_rom_map_elem_t pyb_timer_channel_locals_dict_table[] = {
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2014-08-20 14:21:11 -06:00
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// instance methods
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2017-08-21 05:34:23 -06:00
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{ MP_ROM_QSTR(MP_QSTR_callback), MP_ROM_PTR(&pyb_timer_channel_callback_obj) },
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{ MP_ROM_QSTR(MP_QSTR_pulse_width), MP_ROM_PTR(&pyb_timer_channel_capture_compare_obj) },
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{ MP_ROM_QSTR(MP_QSTR_pulse_width_percent), MP_ROM_PTR(&pyb_timer_channel_pulse_width_percent_obj) },
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{ MP_ROM_QSTR(MP_QSTR_capture), MP_ROM_PTR(&pyb_timer_channel_capture_compare_obj) },
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{ MP_ROM_QSTR(MP_QSTR_compare), MP_ROM_PTR(&pyb_timer_channel_capture_compare_obj) },
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2014-08-20 14:21:11 -06:00
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#if MICROPY_TIMER_REG
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2017-08-21 05:34:23 -06:00
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{ MP_ROM_QSTR(MP_QSTR_reg), MP_ROM_PTR(&pyb_timer_channel_reg_obj) },
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2014-08-20 14:21:11 -06:00
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#endif
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};
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STATIC MP_DEFINE_CONST_DICT(pyb_timer_channel_locals_dict, pyb_timer_channel_locals_dict_table);
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2014-09-21 23:40:42 -06:00
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STATIC const mp_obj_type_t pyb_timer_channel_type = {
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2014-08-20 14:21:11 -06:00
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{ &mp_type_type },
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.name = MP_QSTR_TimerChannel,
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.print = pyb_timer_channel_print,
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.locals_dict = (mp_obj_t)&pyb_timer_channel_locals_dict,
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};
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STATIC bool ftm_handle_irq_callback(pyb_timer_obj_t *self, mp_uint_t channel, mp_obj_t callback) {
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// execute callback if it's set
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if (callback == mp_const_none) {
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return false;
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}
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bool handled = false;
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// When executing code within a handler we must lock the GC to prevent
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// any memory allocations. We must also catch any exceptions.
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gc_lock();
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nlr_buf_t nlr;
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if (nlr_push(&nlr) == 0) {
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mp_call_function_1(callback, self);
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nlr_pop();
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handled = true;
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} else {
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// Uncaught exception; disable the callback so it doesn't run again.
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self->callback = mp_const_none;
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if (channel == 0xffffffff) {
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printf("Uncaught exception in Timer(" UINT_FMT
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") interrupt handler\n", self->tim_id);
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} else {
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printf("Uncaught exception in Timer(" UINT_FMT ") channel "
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UINT_FMT " interrupt handler\n", self->tim_id, channel);
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}
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2015-04-09 16:56:15 -06:00
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mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
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2014-08-20 14:21:11 -06:00
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}
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gc_unlock();
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return handled;
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}
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STATIC void ftm_irq_handler(uint tim_id) {
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if (tim_id >= PYB_TIMER_OBJ_ALL_NUM) {
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return;
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}
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// get the timer object
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pyb_timer_obj_t *self = pyb_timer_obj_all[tim_id];
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if (self == NULL) {
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// timer object has not been set, so we can't do anything
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printf("No timer object for id=%d\n", tim_id);
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return;
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}
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FTM_HandleTypeDef *hftm = &self->ftm;
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bool handled = false;
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// Check for timer (versus timer channel) interrupt.
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if (__HAL_FTM_GET_TOF_IT(hftm) && __HAL_FTM_GET_TOF_FLAG(hftm)) {
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__HAL_FTM_CLEAR_TOF_FLAG(hftm);
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if (ftm_handle_irq_callback(self, 0xffffffff, self->callback)) {
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handled = true;
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} else {
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__HAL_FTM_DISABLE_TOF_IT(&self->ftm);
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printf("No callback for Timer %d TOF (now disabled)\n", tim_id);
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}
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}
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uint32_t processed = 0;
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// Check to see if a timer channel interrupt is pending
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pyb_timer_channel_obj_t *chan = self->channel;
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while (chan != NULL) {
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processed |= (1 << chan->channel);
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if (__HAL_FTM_GET_CH_IT(&self->ftm, chan->channel) && __HAL_FTM_GET_CH_FLAG(&self->ftm, chan->channel)) {
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__HAL_FTM_CLEAR_CH_FLAG(&self->ftm, chan->channel);
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if (ftm_handle_irq_callback(self, chan->channel, chan->callback)) {
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handled = true;
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} else {
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__HAL_FTM_DISABLE_CH_IT(&self->ftm, chan->channel);
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printf("No callback for Timer %d channel %u (now disabled)\n",
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self->tim_id, chan->channel);
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}
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}
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chan = chan->next;
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}
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if (!handled) {
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// An interrupt occurred for a channel we didn't process. Find it and
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// turn it off.
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for (mp_uint_t channel = 0; channel < 8; channel++) {
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if ((processed & (1 << channel)) == 0) {
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if (__HAL_FTM_GET_CH_FLAG(&self->ftm, channel) != 0) {
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__HAL_FTM_CLEAR_CH_FLAG(&self->ftm, channel);
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__HAL_FTM_DISABLE_CH_IT(&self->ftm, channel);
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printf("Unhandled interrupt Timer %d channel %u (now disabled)\n",
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tim_id, channel);
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}
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}
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}
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}
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}
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void ftm0_isr(void) {
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ftm_irq_handler(0);
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}
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void ftm1_isr(void) {
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ftm_irq_handler(1);
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}
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void ftm2_isr(void) {
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ftm_irq_handler(2);
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}
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