![Damien George](/assets/img/avatar_default.png)
Mostly just a global search and replace. Except rt_is_true which becomes mp_obj_is_true. Still would like to tidy up some of the names, but this will do for now.
251 lines
7.1 KiB
C
251 lines
7.1 KiB
C
// TODO make it work with DMA
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#include <stm32f4xx_hal.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "map.h"
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#include "runtime.h"
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#include "sdcard.h"
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#include "pin.h"
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#include "build/pins.h"
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#if MICROPY_HW_HAS_SDCARD
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static SD_HandleTypeDef sd_handle;
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void sdcard_init(void) {
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GPIO_InitTypeDef GPIO_Init_Structure;
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// invalidate the sd_handle
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sd_handle.Instance = NULL;
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// configure SD GPIO
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// we do this here an not in HAL_SD_MspInit because it apparently
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// makes it more robust to have the pins always pulled high
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GPIO_Init_Structure.Mode = GPIO_MODE_AF_PP;
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GPIO_Init_Structure.Pull = GPIO_PULLUP;
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GPIO_Init_Structure.Speed = GPIO_SPEED_HIGH;
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GPIO_Init_Structure.Alternate = GPIO_AF12_SDIO;
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GPIO_Init_Structure.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
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HAL_GPIO_Init(GPIOC, &GPIO_Init_Structure);
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GPIO_Init_Structure.Pin = GPIO_PIN_2;
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HAL_GPIO_Init(GPIOD, &GPIO_Init_Structure);
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// configure the SD card detect pin
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// we do this here so we can detect if the SD card is inserted before powering it on
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GPIO_Init_Structure.Mode = GPIO_MODE_INPUT;
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GPIO_Init_Structure.Pull = MICROPY_HW_SDCARD_DETECT_PULL;
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GPIO_Init_Structure.Speed = GPIO_SPEED_HIGH;
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GPIO_Init_Structure.Pin = MICROPY_HW_SDCARD_DETECT_PIN.pin_mask;
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HAL_GPIO_Init(MICROPY_HW_SDCARD_DETECT_PIN.gpio, &GPIO_Init_Structure);
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}
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void HAL_SD_MspInit(SD_HandleTypeDef *hsd) {
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// enable SDIO clock
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__SDIO_CLK_ENABLE();
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// GPIO have already been initialised by sdcard_init
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// interrupts are not used at the moment
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// they are needed only for DMA transfer (I think...)
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}
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void HAL_SD_MspDeInit(SD_HandleTypeDef *hsd) {
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__SDIO_CLK_DISABLE();
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}
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bool sdcard_is_present(void) {
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return HAL_GPIO_ReadPin(MICROPY_HW_SDCARD_DETECT_PIN.gpio, MICROPY_HW_SDCARD_DETECT_PIN.pin_mask) == MICROPY_HW_SDCARD_DETECT_PRESENT;
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}
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bool sdcard_power_on(void) {
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if (!sdcard_is_present()) {
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return false;
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}
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// SD device interface configuration
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sd_handle.Instance = SDIO;
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sd_handle.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING;
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sd_handle.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE;
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sd_handle.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_DISABLE;
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sd_handle.Init.BusWide = SDIO_BUS_WIDE_1B;
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sd_handle.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;
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sd_handle.Init.ClockDiv = SDIO_TRANSFER_CLK_DIV;
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// init the SD interface
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HAL_SD_CardInfoTypedef cardinfo;
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if (HAL_SD_Init(&sd_handle, &cardinfo) != SD_OK) {
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goto error;
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}
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// configure the SD bus width for wide operation
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if (HAL_SD_WideBusOperation_Config(&sd_handle, SDIO_BUS_WIDE_4B) != SD_OK) {
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HAL_SD_DeInit(&sd_handle);
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goto error;
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}
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return true;
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error:
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sd_handle.Instance = NULL;
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return false;
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}
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void sdcard_power_off(void) {
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HAL_SD_DeInit(&sd_handle);
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sd_handle.Instance = NULL;
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}
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uint64_t sdcard_get_capacity_in_bytes(void) {
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if (sd_handle.Instance == NULL) {
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return 0;
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}
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HAL_SD_CardInfoTypedef cardinfo;
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HAL_SD_Get_CardInfo(&sd_handle, &cardinfo);
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return cardinfo.CardCapacity;
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}
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bool sdcard_read_blocks(uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
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// check that dest pointer is aligned on a 4-byte boundary
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if (((uint32_t)dest & 3) != 0) {
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return false;
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}
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// check that SD card is initialised
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if (sd_handle.Instance == NULL) {
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return false;
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}
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if (HAL_SD_ReadBlocks(&sd_handle, (uint32_t*)dest, block_num * SDCARD_BLOCK_SIZE, SDCARD_BLOCK_SIZE, num_blocks) != SD_OK) {
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return false;
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}
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return true;
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}
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bool sdcard_write_blocks(const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
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// check that src pointer is aligned on a 4-byte boundary
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if (((uint32_t)src & 3) != 0) {
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return false;
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}
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// check that SD card is initialised
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if (sd_handle.Instance == NULL) {
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return false;
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}
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if (HAL_SD_WriteBlocks(&sd_handle, (uint32_t*)src, block_num * SDCARD_BLOCK_SIZE, SDCARD_BLOCK_SIZE, num_blocks) != SD_OK) {
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return false;
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}
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return true;
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}
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#if 0
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DMA not implemented
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bool sdcard_read_blocks_dma(uint8_t *dest, uint32_t block_num, uint32_t num_blocks) {
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// check that dest pointer is aligned on a 4-byte boundary
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if (((uint32_t)dest & 3) != 0) {
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return false;
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}
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// check that SD card is initialised
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if (sd_handle.Instance == NULL) {
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return false;
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}
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// do the read
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if (HAL_SD_ReadBlocks_DMA(&sd_handle, (uint32_t*)dest, block_num * SDCARD_BLOCK_SIZE, SDCARD_BLOCK_SIZE) != SD_OK) {
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return false;
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}
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// wait for DMA transfer to finish, with a large timeout
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if (HAL_SD_CheckReadOperation(&sd_handle, 100000000) != SD_OK) {
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return false;
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}
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return true;
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}
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bool sdcard_write_blocks_dma(const uint8_t *src, uint32_t block_num, uint32_t num_blocks) {
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// check that src pointer is aligned on a 4-byte boundary
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if (((uint32_t)src & 3) != 0) {
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return false;
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}
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// check that SD card is initialised
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if (sd_handle.Instance == NULL) {
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return false;
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}
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SD_Error status;
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status = HAL_SD_WriteBlock_DMA(&sd_handle, (uint32_t*)src, block_num * SDCARD_BLOCK_SIZE, SDCARD_BLOCK_SIZE, num_blocks);
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if (status != SD_OK) {
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return false;
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}
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// wait for DMA transfer to finish, with a large timeout
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status = HAL_SD_CheckWriteOperation(&sd_handle, 100000000);
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if (status != SD_OK) {
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return false;
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}
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return true;
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}
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#endif
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/******************************************************************************/
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// Micro Python bindings
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static mp_obj_t sd_present(mp_obj_t self) {
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return MP_BOOL(sdcard_is_present());
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(sd_present_obj, sd_present);
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static mp_obj_t sd_power(mp_obj_t self, mp_obj_t state) {
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bool result;
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if (mp_obj_is_true(state)) {
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result = sdcard_power_on();
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} else {
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sdcard_power_off();
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result = true;
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}
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return MP_BOOL(result);
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}
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static MP_DEFINE_CONST_FUN_OBJ_2(sd_power_obj, sd_power);
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static mp_obj_t sd_read(mp_obj_t self, mp_obj_t block_num) {
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uint8_t *dest = m_new(uint8_t, SDCARD_BLOCK_SIZE);
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if (!sdcard_read_blocks(dest, mp_obj_get_int(block_num), 1)) {
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m_free(dest, SDCARD_BLOCK_SIZE);
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return mp_const_none;
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}
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return mp_obj_new_bytearray_by_ref(SDCARD_BLOCK_SIZE, dest);
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}
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static MP_DEFINE_CONST_FUN_OBJ_2(sd_read_obj, sd_read);
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STATIC const mp_map_elem_t sdcard_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_present), (mp_obj_t)&sd_present_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_power), (mp_obj_t)&sd_power_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&sd_read_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(sdcard_locals_dict, sdcard_locals_dict_table);
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static const mp_obj_type_t sdcard_type = {
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{ &mp_type_type },
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.name = MP_QSTR_SDcard,
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.locals_dict = (mp_obj_t)&sdcard_locals_dict,
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};
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const mp_obj_base_t pyb_sdcard_obj = {&sdcard_type};
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#endif // MICROPY_HW_HAS_SDCARD
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