diff --git a/stm/Makefile b/stm/Makefile index 9e5ba14fa..6203e9f4a 100644 --- a/stm/Makefile +++ b/stm/Makefile @@ -26,6 +26,7 @@ SRC_C = \ usart.c \ usb.c \ sdio.c \ + audio.c \ lexerstm.c \ SRC_S = \ @@ -70,6 +71,7 @@ SRC_STM = \ stm32f4xx_rtc.c \ stm32f4xx_usart.c \ stm32f4xx_spi.c \ + stm32f4xx_dac.c \ stm_misc.c \ usb_core.c \ usb_dcd.c \ diff --git a/stm/audio.c b/stm/audio.c new file mode 100644 index 000000000..2df4e0794 --- /dev/null +++ b/stm/audio.c @@ -0,0 +1,98 @@ +#include + +#include "stm32f4xx_rcc.h" +#include "stm32f4xx_gpio.h" +#include "stm32f4xx_dac.h" + +#include "nlr.h" +#include "misc.h" +//#include "lexer.h" +//#include "lexerstm.h" +#include "mpyconfig.h" +#include "parse.h" +#include "compile.h" +#include "runtime.h" + +#define SAMPLE_BUF_SIZE (32) + +// sample_buf_in is always the same or ahead of sample_buf_out +// when they are the same, there are no more samples left to process +// in this scheme, there is always 1 unusable byte in the buffer, just before sample_buf_out +int sample_buf_in; +int sample_buf_out; +byte sample_buf[SAMPLE_BUF_SIZE]; + +bool audio_is_full(void) { + return ((sample_buf_in + 1) % SAMPLE_BUF_SIZE) == sample_buf_out; +} + +void audio_fill(byte sample) { + sample_buf[sample_buf_in] = sample; + sample_buf_in = (sample_buf_in + 1) % SAMPLE_BUF_SIZE; + // enable interrupt +} + +void audio_drain(void) { + if (sample_buf_in == sample_buf_out) { + // buffer is empty; disable interrupt + } else { + // buffer has a sample; output it + byte sample = sample_buf[sample_buf_out]; + DAC_SetChannel2Data(DAC_Align_8b_R, sample); + sample_buf_out = (sample_buf_out + 1) % SAMPLE_BUF_SIZE; + } +} + +// direct access to DAC +py_obj_t pyb_audio_dac(py_obj_t val) { + DAC_SetChannel2Data(DAC_Align_8b_R, py_obj_get_int(val)); + return py_const_none; +} + +py_obj_t pyb_audio_is_full(void) { + if (audio_is_full()) { + return py_const_true; + } else { + return py_const_false; + } +} + +py_obj_t pyb_audio_fill(py_obj_t val) { + audio_fill(py_obj_get_int(val)); + return py_const_none; +} + +void audio_init(void) { + // DAC peripheral clock + RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE); + + // DAC channel 2 (DAC_OUT2 = PA.5) configuration + GPIO_InitTypeDef GPIO_InitStructure; + GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; + GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; + GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; + GPIO_Init(GPIOA, &GPIO_InitStructure); + + // DAC channel2 Configuration + DAC_InitTypeDef DAC_InitStructure; + DAC_InitStructure.DAC_Trigger = DAC_Trigger_None; + DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None; + DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; + DAC_Init(DAC_Channel_2, &DAC_InitStructure); + + // Enable DAC Channel2 + DAC_Cmd(DAC_Channel_2, ENABLE); + + // from now on use DAC_SetChannel2Data to trigger a conversion + + sample_buf_in = 0; + sample_buf_out = 0; + // enable interrupt + + // Python interface + py_obj_t m = py_module_new(); + rt_store_attr(m, qstr_from_str_static("dac"), rt_make_function_1(pyb_audio_dac)); + rt_store_attr(m, qstr_from_str_static("is_full"), rt_make_function_0(pyb_audio_is_full)); + rt_store_attr(m, qstr_from_str_static("fill"), rt_make_function_1(pyb_audio_fill)); + rt_store_name(qstr_from_str_static("audio"), m); +} diff --git a/stm/audio.h b/stm/audio.h new file mode 100644 index 000000000..be5f48155 --- /dev/null +++ b/stm/audio.h @@ -0,0 +1 @@ +void audio_init(void); diff --git a/stm/lib/stm32f4xx_dac.c b/stm/lib/stm32f4xx_dac.c new file mode 100644 index 000000000..bc19fb3b3 --- /dev/null +++ b/stm/lib/stm32f4xx_dac.c @@ -0,0 +1,715 @@ +/** + ****************************************************************************** + * @file stm32f4xx_dac.c + * @author MCD Application Team + * @version V1.1.0 + * @date 11-January-2013 + * @brief This file provides firmware functions to manage the following + * functionalities of the Digital-to-Analog Converter (DAC) peripheral: + * + DAC channels configuration: trigger, output buffer, data format + * + DMA management + * + Interrupts and flags management + * + @verbatim + =============================================================================== + ##### DAC Peripheral features ##### + =============================================================================== + [..] + *** DAC Channels *** + ==================== + [..] + The device integrates two 12-bit Digital Analog Converters that can + be used independently or simultaneously (dual mode): + (#) DAC channel1 with DAC_OUT1 (PA4) as output + (#) DAC channel2 with DAC_OUT2 (PA5) as output + + *** DAC Triggers *** + ==================== + [..] + Digital to Analog conversion can be non-triggered using DAC_Trigger_None + and DAC_OUT1/DAC_OUT2 is available once writing to DHRx register + using DAC_SetChannel1Data() / DAC_SetChannel2Data() functions. + [..] + Digital to Analog conversion can be triggered by: + (#) External event: EXTI Line 9 (any GPIOx_Pin9) using DAC_Trigger_Ext_IT9. + The used pin (GPIOx_Pin9) must be configured in input mode. + + (#) Timers TRGO: TIM2, TIM4, TIM5, TIM6, TIM7 and TIM8 + (DAC_Trigger_T2_TRGO, DAC_Trigger_T4_TRGO...) + The timer TRGO event should be selected using TIM_SelectOutputTrigger() + + (#) Software using DAC_Trigger_Software + + *** DAC Buffer mode feature *** + =============================== + [..] + Each DAC channel integrates an output buffer that can be used to + reduce the output impedance, and to drive external loads directly + without having to add an external operational amplifier. + To enable, the output buffer use + DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable; + [..] + (@) Refer to the device datasheet for more details about output + impedance value with and without output buffer. + + *** DAC wave generation feature *** + =================================== + [..] + Both DAC channels can be used to generate + (#) Noise wave using DAC_WaveGeneration_Noise + (#) Triangle wave using DAC_WaveGeneration_Triangle + + -@- Wave generation can be disabled using DAC_WaveGeneration_None + + *** DAC data format *** + ======================= + [..] + The DAC data format can be: + (#) 8-bit right alignment using DAC_Align_8b_R + (#) 12-bit left alignment using DAC_Align_12b_L + (#) 12-bit right alignment using DAC_Align_12b_R + + *** DAC data value to voltage correspondence *** + ================================================ + [..] + The analog output voltage on each DAC channel pin is determined + by the following equation: + DAC_OUTx = VREF+ * DOR / 4095 + with DOR is the Data Output Register + VEF+ is the input voltage reference (refer to the device datasheet) + e.g. To set DAC_OUT1 to 0.7V, use + DAC_SetChannel1Data(DAC_Align_12b_R, 868); + Assuming that VREF+ = 3.3V, DAC_OUT1 = (3.3 * 868) / 4095 = 0.7V + + *** DMA requests *** + ===================== + [..] + A DMA1 request can be generated when an external trigger (but not + a software trigger) occurs if DMA1 requests are enabled using + DAC_DMACmd() + [..] + DMA1 requests are mapped as following: + (#) DAC channel1 : mapped on DMA1 Stream5 channel7 which must be + already configured + (#) DAC channel2 : mapped on DMA1 Stream6 channel7 which must be + already configured + + + ##### How to use this driver ##### + =============================================================================== + [..] + (+) DAC APB clock must be enabled to get write access to DAC + registers using + RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE) + (+) Configure DAC_OUTx (DAC_OUT1: PA4, DAC_OUT2: PA5) in analog mode. + (+) Configure the DAC channel using DAC_Init() function + (+) Enable the DAC channel using DAC_Cmd() function + + @endverbatim + ****************************************************************************** + * @attention + * + *

© COPYRIGHT 2013 STMicroelectronics

+ * + * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); + * You may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.st.com/software_license_agreement_liberty_v2 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + ****************************************************************************** + */ + + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f4xx_conf.h" +#include "stm32f4xx_dac.h" +#include "stm32f4xx_rcc.h" + +/** @addtogroup STM32F4xx_StdPeriph_Driver + * @{ + */ + +/** @defgroup DAC + * @brief DAC driver modules + * @{ + */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ + +/* CR register Mask */ +#define CR_CLEAR_MASK ((uint32_t)0x00000FFE) + +/* DAC Dual Channels SWTRIG masks */ +#define DUAL_SWTRIG_SET ((uint32_t)0x00000003) +#define DUAL_SWTRIG_RESET ((uint32_t)0xFFFFFFFC) + +/* DHR registers offsets */ +#define DHR12R1_OFFSET ((uint32_t)0x00000008) +#define DHR12R2_OFFSET ((uint32_t)0x00000014) +#define DHR12RD_OFFSET ((uint32_t)0x00000020) + +/* DOR register offset */ +#define DOR_OFFSET ((uint32_t)0x0000002C) + +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ + +/** @defgroup DAC_Private_Functions + * @{ + */ + +/** @defgroup DAC_Group1 DAC channels configuration + * @brief DAC channels configuration: trigger, output buffer, data format + * +@verbatim + =============================================================================== + ##### DAC channels configuration: trigger, output buffer, data format ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Deinitializes the DAC peripheral registers to their default reset values. + * @param None + * @retval None + */ +void DAC_DeInit(void) +{ + /* Enable DAC reset state */ + RCC_APB1PeriphResetCmd(RCC_APB1Periph_DAC, ENABLE); + /* Release DAC from reset state */ + RCC_APB1PeriphResetCmd(RCC_APB1Periph_DAC, DISABLE); +} + +/** + * @brief Initializes the DAC peripheral according to the specified parameters + * in the DAC_InitStruct. + * @param DAC_Channel: the selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param DAC_InitStruct: pointer to a DAC_InitTypeDef structure that contains + * the configuration information for the specified DAC channel. + * @retval None + */ +void DAC_Init(uint32_t DAC_Channel, DAC_InitTypeDef* DAC_InitStruct) +{ + uint32_t tmpreg1 = 0, tmpreg2 = 0; + + /* Check the DAC parameters */ + assert_param(IS_DAC_TRIGGER(DAC_InitStruct->DAC_Trigger)); + assert_param(IS_DAC_GENERATE_WAVE(DAC_InitStruct->DAC_WaveGeneration)); + assert_param(IS_DAC_LFSR_UNMASK_TRIANGLE_AMPLITUDE(DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude)); + assert_param(IS_DAC_OUTPUT_BUFFER_STATE(DAC_InitStruct->DAC_OutputBuffer)); + +/*---------------------------- DAC CR Configuration --------------------------*/ + /* Get the DAC CR value */ + tmpreg1 = DAC->CR; + /* Clear BOFFx, TENx, TSELx, WAVEx and MAMPx bits */ + tmpreg1 &= ~(CR_CLEAR_MASK << DAC_Channel); + /* Configure for the selected DAC channel: buffer output, trigger, + wave generation, mask/amplitude for wave generation */ + /* Set TSELx and TENx bits according to DAC_Trigger value */ + /* Set WAVEx bits according to DAC_WaveGeneration value */ + /* Set MAMPx bits according to DAC_LFSRUnmask_TriangleAmplitude value */ + /* Set BOFFx bit according to DAC_OutputBuffer value */ + tmpreg2 = (DAC_InitStruct->DAC_Trigger | DAC_InitStruct->DAC_WaveGeneration | + DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude | \ + DAC_InitStruct->DAC_OutputBuffer); + /* Calculate CR register value depending on DAC_Channel */ + tmpreg1 |= tmpreg2 << DAC_Channel; + /* Write to DAC CR */ + DAC->CR = tmpreg1; +} + +/** + * @brief Fills each DAC_InitStruct member with its default value. + * @param DAC_InitStruct: pointer to a DAC_InitTypeDef structure which will + * be initialized. + * @retval None + */ +void DAC_StructInit(DAC_InitTypeDef* DAC_InitStruct) +{ +/*--------------- Reset DAC init structure parameters values -----------------*/ + /* Initialize the DAC_Trigger member */ + DAC_InitStruct->DAC_Trigger = DAC_Trigger_None; + /* Initialize the DAC_WaveGeneration member */ + DAC_InitStruct->DAC_WaveGeneration = DAC_WaveGeneration_None; + /* Initialize the DAC_LFSRUnmask_TriangleAmplitude member */ + DAC_InitStruct->DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0; + /* Initialize the DAC_OutputBuffer member */ + DAC_InitStruct->DAC_OutputBuffer = DAC_OutputBuffer_Enable; +} + +/** + * @brief Enables or disables the specified DAC channel. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param NewState: new state of the DAC channel. + * This parameter can be: ENABLE or DISABLE. + * @note When the DAC channel is enabled the trigger source can no more be modified. + * @retval None + */ +void DAC_Cmd(uint32_t DAC_Channel, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Enable the selected DAC channel */ + DAC->CR |= (DAC_CR_EN1 << DAC_Channel); + } + else + { + /* Disable the selected DAC channel */ + DAC->CR &= (~(DAC_CR_EN1 << DAC_Channel)); + } +} + +/** + * @brief Enables or disables the selected DAC channel software trigger. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param NewState: new state of the selected DAC channel software trigger. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void DAC_SoftwareTriggerCmd(uint32_t DAC_Channel, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Enable software trigger for the selected DAC channel */ + DAC->SWTRIGR |= (uint32_t)DAC_SWTRIGR_SWTRIG1 << (DAC_Channel >> 4); + } + else + { + /* Disable software trigger for the selected DAC channel */ + DAC->SWTRIGR &= ~((uint32_t)DAC_SWTRIGR_SWTRIG1 << (DAC_Channel >> 4)); + } +} + +/** + * @brief Enables or disables simultaneously the two DAC channels software triggers. + * @param NewState: new state of the DAC channels software triggers. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void DAC_DualSoftwareTriggerCmd(FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Enable software trigger for both DAC channels */ + DAC->SWTRIGR |= DUAL_SWTRIG_SET; + } + else + { + /* Disable software trigger for both DAC channels */ + DAC->SWTRIGR &= DUAL_SWTRIG_RESET; + } +} + +/** + * @brief Enables or disables the selected DAC channel wave generation. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param DAC_Wave: specifies the wave type to enable or disable. + * This parameter can be one of the following values: + * @arg DAC_Wave_Noise: noise wave generation + * @arg DAC_Wave_Triangle: triangle wave generation + * @param NewState: new state of the selected DAC channel wave generation. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void DAC_WaveGenerationCmd(uint32_t DAC_Channel, uint32_t DAC_Wave, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + assert_param(IS_DAC_WAVE(DAC_Wave)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Enable the selected wave generation for the selected DAC channel */ + DAC->CR |= DAC_Wave << DAC_Channel; + } + else + { + /* Disable the selected wave generation for the selected DAC channel */ + DAC->CR &= ~(DAC_Wave << DAC_Channel); + } +} + +/** + * @brief Set the specified data holding register value for DAC channel1. + * @param DAC_Align: Specifies the data alignment for DAC channel1. + * This parameter can be one of the following values: + * @arg DAC_Align_8b_R: 8bit right data alignment selected + * @arg DAC_Align_12b_L: 12bit left data alignment selected + * @arg DAC_Align_12b_R: 12bit right data alignment selected + * @param Data: Data to be loaded in the selected data holding register. + * @retval None + */ +void DAC_SetChannel1Data(uint32_t DAC_Align, uint16_t Data) +{ + __IO uint32_t tmp = 0; + + /* Check the parameters */ + assert_param(IS_DAC_ALIGN(DAC_Align)); + assert_param(IS_DAC_DATA(Data)); + + tmp = (uint32_t)DAC_BASE; + tmp += DHR12R1_OFFSET + DAC_Align; + + /* Set the DAC channel1 selected data holding register */ + *(__IO uint32_t *) tmp = Data; +} + +/** + * @brief Set the specified data holding register value for DAC channel2. + * @param DAC_Align: Specifies the data alignment for DAC channel2. + * This parameter can be one of the following values: + * @arg DAC_Align_8b_R: 8bit right data alignment selected + * @arg DAC_Align_12b_L: 12bit left data alignment selected + * @arg DAC_Align_12b_R: 12bit right data alignment selected + * @param Data: Data to be loaded in the selected data holding register. + * @retval None + */ +void DAC_SetChannel2Data(uint32_t DAC_Align, uint16_t Data) +{ + __IO uint32_t tmp = 0; + + /* Check the parameters */ + assert_param(IS_DAC_ALIGN(DAC_Align)); + assert_param(IS_DAC_DATA(Data)); + + tmp = (uint32_t)DAC_BASE; + tmp += DHR12R2_OFFSET + DAC_Align; + + /* Set the DAC channel2 selected data holding register */ + *(__IO uint32_t *)tmp = Data; +} + +/** + * @brief Set the specified data holding register value for dual channel DAC. + * @param DAC_Align: Specifies the data alignment for dual channel DAC. + * This parameter can be one of the following values: + * @arg DAC_Align_8b_R: 8bit right data alignment selected + * @arg DAC_Align_12b_L: 12bit left data alignment selected + * @arg DAC_Align_12b_R: 12bit right data alignment selected + * @param Data2: Data for DAC Channel2 to be loaded in the selected data holding register. + * @param Data1: Data for DAC Channel1 to be loaded in the selected data holding register. + * @note In dual mode, a unique register access is required to write in both + * DAC channels at the same time. + * @retval None + */ +void DAC_SetDualChannelData(uint32_t DAC_Align, uint16_t Data2, uint16_t Data1) +{ + uint32_t data = 0, tmp = 0; + + /* Check the parameters */ + assert_param(IS_DAC_ALIGN(DAC_Align)); + assert_param(IS_DAC_DATA(Data1)); + assert_param(IS_DAC_DATA(Data2)); + + /* Calculate and set dual DAC data holding register value */ + if (DAC_Align == DAC_Align_8b_R) + { + data = ((uint32_t)Data2 << 8) | Data1; + } + else + { + data = ((uint32_t)Data2 << 16) | Data1; + } + + tmp = (uint32_t)DAC_BASE; + tmp += DHR12RD_OFFSET + DAC_Align; + + /* Set the dual DAC selected data holding register */ + *(__IO uint32_t *)tmp = data; +} + +/** + * @brief Returns the last data output value of the selected DAC channel. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @retval The selected DAC channel data output value. + */ +uint16_t DAC_GetDataOutputValue(uint32_t DAC_Channel) +{ + __IO uint32_t tmp = 0; + + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + + tmp = (uint32_t) DAC_BASE ; + tmp += DOR_OFFSET + ((uint32_t)DAC_Channel >> 2); + + /* Returns the DAC channel data output register value */ + return (uint16_t) (*(__IO uint32_t*) tmp); +} +/** + * @} + */ + +/** @defgroup DAC_Group2 DMA management functions + * @brief DMA management functions + * +@verbatim + =============================================================================== + ##### DMA management functions ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Enables or disables the specified DAC channel DMA request. + * @note When enabled DMA1 is generated when an external trigger (EXTI Line9, + * TIM2, TIM4, TIM5, TIM6, TIM7 or TIM8 but not a software trigger) occurs. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param NewState: new state of the selected DAC channel DMA request. + * This parameter can be: ENABLE or DISABLE. + * @note The DAC channel1 is mapped on DMA1 Stream 5 channel7 which must be + * already configured. + * @note The DAC channel2 is mapped on DMA1 Stream 6 channel7 which must be + * already configured. + * @retval None + */ +void DAC_DMACmd(uint32_t DAC_Channel, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + /* Enable the selected DAC channel DMA request */ + DAC->CR |= (DAC_CR_DMAEN1 << DAC_Channel); + } + else + { + /* Disable the selected DAC channel DMA request */ + DAC->CR &= (~(DAC_CR_DMAEN1 << DAC_Channel)); + } +} +/** + * @} + */ + +/** @defgroup DAC_Group3 Interrupts and flags management functions + * @brief Interrupts and flags management functions + * +@verbatim + =============================================================================== + ##### Interrupts and flags management functions ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Enables or disables the specified DAC interrupts. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param DAC_IT: specifies the DAC interrupt sources to be enabled or disabled. + * This parameter can be the following values: + * @arg DAC_IT_DMAUDR: DMA underrun interrupt mask + * @note The DMA underrun occurs when a second external trigger arrives before the + * acknowledgement for the first external trigger is received (first request). + * @param NewState: new state of the specified DAC interrupts. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void DAC_ITConfig(uint32_t DAC_Channel, uint32_t DAC_IT, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + assert_param(IS_DAC_IT(DAC_IT)); + + if (NewState != DISABLE) + { + /* Enable the selected DAC interrupts */ + DAC->CR |= (DAC_IT << DAC_Channel); + } + else + { + /* Disable the selected DAC interrupts */ + DAC->CR &= (~(uint32_t)(DAC_IT << DAC_Channel)); + } +} + +/** + * @brief Checks whether the specified DAC flag is set or not. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param DAC_FLAG: specifies the flag to check. + * This parameter can be only of the following value: + * @arg DAC_FLAG_DMAUDR: DMA underrun flag + * @note The DMA underrun occurs when a second external trigger arrives before the + * acknowledgement for the first external trigger is received (first request). + * @retval The new state of DAC_FLAG (SET or RESET). + */ +FlagStatus DAC_GetFlagStatus(uint32_t DAC_Channel, uint32_t DAC_FLAG) +{ + FlagStatus bitstatus = RESET; + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + assert_param(IS_DAC_FLAG(DAC_FLAG)); + + /* Check the status of the specified DAC flag */ + if ((DAC->SR & (DAC_FLAG << DAC_Channel)) != (uint8_t)RESET) + { + /* DAC_FLAG is set */ + bitstatus = SET; + } + else + { + /* DAC_FLAG is reset */ + bitstatus = RESET; + } + /* Return the DAC_FLAG status */ + return bitstatus; +} + +/** + * @brief Clears the DAC channel's pending flags. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param DAC_FLAG: specifies the flag to clear. + * This parameter can be of the following value: + * @arg DAC_FLAG_DMAUDR: DMA underrun flag + * @note The DMA underrun occurs when a second external trigger arrives before the + * acknowledgement for the first external trigger is received (first request). + * @retval None + */ +void DAC_ClearFlag(uint32_t DAC_Channel, uint32_t DAC_FLAG) +{ + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + assert_param(IS_DAC_FLAG(DAC_FLAG)); + + /* Clear the selected DAC flags */ + DAC->SR = (DAC_FLAG << DAC_Channel); +} + +/** + * @brief Checks whether the specified DAC interrupt has occurred or not. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param DAC_IT: specifies the DAC interrupt source to check. + * This parameter can be the following values: + * @arg DAC_IT_DMAUDR: DMA underrun interrupt mask + * @note The DMA underrun occurs when a second external trigger arrives before the + * acknowledgement for the first external trigger is received (first request). + * @retval The new state of DAC_IT (SET or RESET). + */ +ITStatus DAC_GetITStatus(uint32_t DAC_Channel, uint32_t DAC_IT) +{ + ITStatus bitstatus = RESET; + uint32_t enablestatus = 0; + + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + assert_param(IS_DAC_IT(DAC_IT)); + + /* Get the DAC_IT enable bit status */ + enablestatus = (DAC->CR & (DAC_IT << DAC_Channel)) ; + + /* Check the status of the specified DAC interrupt */ + if (((DAC->SR & (DAC_IT << DAC_Channel)) != (uint32_t)RESET) && enablestatus) + { + /* DAC_IT is set */ + bitstatus = SET; + } + else + { + /* DAC_IT is reset */ + bitstatus = RESET; + } + /* Return the DAC_IT status */ + return bitstatus; +} + +/** + * @brief Clears the DAC channel's interrupt pending bits. + * @param DAC_Channel: The selected DAC channel. + * This parameter can be one of the following values: + * @arg DAC_Channel_1: DAC Channel1 selected + * @arg DAC_Channel_2: DAC Channel2 selected + * @param DAC_IT: specifies the DAC interrupt pending bit to clear. + * This parameter can be the following values: + * @arg DAC_IT_DMAUDR: DMA underrun interrupt mask + * @note The DMA underrun occurs when a second external trigger arrives before the + * acknowledgement for the first external trigger is received (first request). + * @retval None + */ +void DAC_ClearITPendingBit(uint32_t DAC_Channel, uint32_t DAC_IT) +{ + /* Check the parameters */ + assert_param(IS_DAC_CHANNEL(DAC_Channel)); + assert_param(IS_DAC_IT(DAC_IT)); + + /* Clear the selected DAC interrupt pending bits */ + DAC->SR = (DAC_IT << DAC_Channel); +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ diff --git a/stm/lib/stm32f4xx_dac.h b/stm/lib/stm32f4xx_dac.h new file mode 100644 index 000000000..62c0c8728 --- /dev/null +++ b/stm/lib/stm32f4xx_dac.h @@ -0,0 +1,304 @@ +/** + ****************************************************************************** + * @file stm32f4xx_dac.h + * @author MCD Application Team + * @version V1.1.0 + * @date 11-January-2013 + * @brief This file contains all the functions prototypes for the DAC firmware + * library. + ****************************************************************************** + * @attention + * + *

© COPYRIGHT 2013 STMicroelectronics

+ * + * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); + * You may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.st.com/software_license_agreement_liberty_v2 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + ****************************************************************************** + */ + +/* Define to prevent recursive inclusion -------------------------------------*/ +#ifndef __STM32F4xx_DAC_H +#define __STM32F4xx_DAC_H + +#ifdef __cplusplus + extern "C" { +#endif + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f4xx.h" + +/** @addtogroup STM32F4xx_StdPeriph_Driver + * @{ + */ + +/** @addtogroup DAC + * @{ + */ + +/* Exported types ------------------------------------------------------------*/ + +/** + * @brief DAC Init structure definition + */ + +typedef struct +{ + uint32_t DAC_Trigger; /*!< Specifies the external trigger for the selected DAC channel. + This parameter can be a value of @ref DAC_trigger_selection */ + + uint32_t DAC_WaveGeneration; /*!< Specifies whether DAC channel noise waves or triangle waves + are generated, or whether no wave is generated. + This parameter can be a value of @ref DAC_wave_generation */ + + uint32_t DAC_LFSRUnmask_TriangleAmplitude; /*!< Specifies the LFSR mask for noise wave generation or + the maximum amplitude triangle generation for the DAC channel. + This parameter can be a value of @ref DAC_lfsrunmask_triangleamplitude */ + + uint32_t DAC_OutputBuffer; /*!< Specifies whether the DAC channel output buffer is enabled or disabled. + This parameter can be a value of @ref DAC_output_buffer */ +}DAC_InitTypeDef; + +/* Exported constants --------------------------------------------------------*/ + +/** @defgroup DAC_Exported_Constants + * @{ + */ + +/** @defgroup DAC_trigger_selection + * @{ + */ + +#define DAC_Trigger_None ((uint32_t)0x00000000) /*!< Conversion is automatic once the DAC1_DHRxxxx register + has been loaded, and not by external trigger */ +#define DAC_Trigger_T2_TRGO ((uint32_t)0x00000024) /*!< TIM2 TRGO selected as external conversion trigger for DAC channel */ +#define DAC_Trigger_T4_TRGO ((uint32_t)0x0000002C) /*!< TIM4 TRGO selected as external conversion trigger for DAC channel */ +#define DAC_Trigger_T5_TRGO ((uint32_t)0x0000001C) /*!< TIM5 TRGO selected as external conversion trigger for DAC channel */ +#define DAC_Trigger_T6_TRGO ((uint32_t)0x00000004) /*!< TIM6 TRGO selected as external conversion trigger for DAC channel */ +#define DAC_Trigger_T7_TRGO ((uint32_t)0x00000014) /*!< TIM7 TRGO selected as external conversion trigger for DAC channel */ +#define DAC_Trigger_T8_TRGO ((uint32_t)0x0000000C) /*!< TIM8 TRGO selected as external conversion trigger for DAC channel */ + +#define DAC_Trigger_Ext_IT9 ((uint32_t)0x00000034) /*!< EXTI Line9 event selected as external conversion trigger for DAC channel */ +#define DAC_Trigger_Software ((uint32_t)0x0000003C) /*!< Conversion started by software trigger for DAC channel */ + +#define IS_DAC_TRIGGER(TRIGGER) (((TRIGGER) == DAC_Trigger_None) || \ + ((TRIGGER) == DAC_Trigger_T6_TRGO) || \ + ((TRIGGER) == DAC_Trigger_T8_TRGO) || \ + ((TRIGGER) == DAC_Trigger_T7_TRGO) || \ + ((TRIGGER) == DAC_Trigger_T5_TRGO) || \ + ((TRIGGER) == DAC_Trigger_T2_TRGO) || \ + ((TRIGGER) == DAC_Trigger_T4_TRGO) || \ + ((TRIGGER) == DAC_Trigger_Ext_IT9) || \ + ((TRIGGER) == DAC_Trigger_Software)) + +/** + * @} + */ + +/** @defgroup DAC_wave_generation + * @{ + */ + +#define DAC_WaveGeneration_None ((uint32_t)0x00000000) +#define DAC_WaveGeneration_Noise ((uint32_t)0x00000040) +#define DAC_WaveGeneration_Triangle ((uint32_t)0x00000080) +#define IS_DAC_GENERATE_WAVE(WAVE) (((WAVE) == DAC_WaveGeneration_None) || \ + ((WAVE) == DAC_WaveGeneration_Noise) || \ + ((WAVE) == DAC_WaveGeneration_Triangle)) +/** + * @} + */ + +/** @defgroup DAC_lfsrunmask_triangleamplitude + * @{ + */ + +#define DAC_LFSRUnmask_Bit0 ((uint32_t)0x00000000) /*!< Unmask DAC channel LFSR bit0 for noise wave generation */ +#define DAC_LFSRUnmask_Bits1_0 ((uint32_t)0x00000100) /*!< Unmask DAC channel LFSR bit[1:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits2_0 ((uint32_t)0x00000200) /*!< Unmask DAC channel LFSR bit[2:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits3_0 ((uint32_t)0x00000300) /*!< Unmask DAC channel LFSR bit[3:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits4_0 ((uint32_t)0x00000400) /*!< Unmask DAC channel LFSR bit[4:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits5_0 ((uint32_t)0x00000500) /*!< Unmask DAC channel LFSR bit[5:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits6_0 ((uint32_t)0x00000600) /*!< Unmask DAC channel LFSR bit[6:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits7_0 ((uint32_t)0x00000700) /*!< Unmask DAC channel LFSR bit[7:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits8_0 ((uint32_t)0x00000800) /*!< Unmask DAC channel LFSR bit[8:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits9_0 ((uint32_t)0x00000900) /*!< Unmask DAC channel LFSR bit[9:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits10_0 ((uint32_t)0x00000A00) /*!< Unmask DAC channel LFSR bit[10:0] for noise wave generation */ +#define DAC_LFSRUnmask_Bits11_0 ((uint32_t)0x00000B00) /*!< Unmask DAC channel LFSR bit[11:0] for noise wave generation */ +#define DAC_TriangleAmplitude_1 ((uint32_t)0x00000000) /*!< Select max triangle amplitude of 1 */ +#define DAC_TriangleAmplitude_3 ((uint32_t)0x00000100) /*!< Select max triangle amplitude of 3 */ +#define DAC_TriangleAmplitude_7 ((uint32_t)0x00000200) /*!< Select max triangle amplitude of 7 */ +#define DAC_TriangleAmplitude_15 ((uint32_t)0x00000300) /*!< Select max triangle amplitude of 15 */ +#define DAC_TriangleAmplitude_31 ((uint32_t)0x00000400) /*!< Select max triangle amplitude of 31 */ +#define DAC_TriangleAmplitude_63 ((uint32_t)0x00000500) /*!< Select max triangle amplitude of 63 */ +#define DAC_TriangleAmplitude_127 ((uint32_t)0x00000600) /*!< Select max triangle amplitude of 127 */ +#define DAC_TriangleAmplitude_255 ((uint32_t)0x00000700) /*!< Select max triangle amplitude of 255 */ +#define DAC_TriangleAmplitude_511 ((uint32_t)0x00000800) /*!< Select max triangle amplitude of 511 */ +#define DAC_TriangleAmplitude_1023 ((uint32_t)0x00000900) /*!< Select max triangle amplitude of 1023 */ +#define DAC_TriangleAmplitude_2047 ((uint32_t)0x00000A00) /*!< Select max triangle amplitude of 2047 */ +#define DAC_TriangleAmplitude_4095 ((uint32_t)0x00000B00) /*!< Select max triangle amplitude of 4095 */ + +#define IS_DAC_LFSR_UNMASK_TRIANGLE_AMPLITUDE(VALUE) (((VALUE) == DAC_LFSRUnmask_Bit0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits1_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits2_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits3_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits4_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits5_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits6_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits7_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits8_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits9_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits10_0) || \ + ((VALUE) == DAC_LFSRUnmask_Bits11_0) || \ + ((VALUE) == DAC_TriangleAmplitude_1) || \ + ((VALUE) == DAC_TriangleAmplitude_3) || \ + ((VALUE) == DAC_TriangleAmplitude_7) || \ + ((VALUE) == DAC_TriangleAmplitude_15) || \ + ((VALUE) == DAC_TriangleAmplitude_31) || \ + ((VALUE) == DAC_TriangleAmplitude_63) || \ + ((VALUE) == DAC_TriangleAmplitude_127) || \ + ((VALUE) == DAC_TriangleAmplitude_255) || \ + ((VALUE) == DAC_TriangleAmplitude_511) || \ + ((VALUE) == DAC_TriangleAmplitude_1023) || \ + ((VALUE) == DAC_TriangleAmplitude_2047) || \ + ((VALUE) == DAC_TriangleAmplitude_4095)) +/** + * @} + */ + +/** @defgroup DAC_output_buffer + * @{ + */ + +#define DAC_OutputBuffer_Enable ((uint32_t)0x00000000) +#define DAC_OutputBuffer_Disable ((uint32_t)0x00000002) +#define IS_DAC_OUTPUT_BUFFER_STATE(STATE) (((STATE) == DAC_OutputBuffer_Enable) || \ + ((STATE) == DAC_OutputBuffer_Disable)) +/** + * @} + */ + +/** @defgroup DAC_Channel_selection + * @{ + */ + +#define DAC_Channel_1 ((uint32_t)0x00000000) +#define DAC_Channel_2 ((uint32_t)0x00000010) +#define IS_DAC_CHANNEL(CHANNEL) (((CHANNEL) == DAC_Channel_1) || \ + ((CHANNEL) == DAC_Channel_2)) +/** + * @} + */ + +/** @defgroup DAC_data_alignement + * @{ + */ + +#define DAC_Align_12b_R ((uint32_t)0x00000000) +#define DAC_Align_12b_L ((uint32_t)0x00000004) +#define DAC_Align_8b_R ((uint32_t)0x00000008) +#define IS_DAC_ALIGN(ALIGN) (((ALIGN) == DAC_Align_12b_R) || \ + ((ALIGN) == DAC_Align_12b_L) || \ + ((ALIGN) == DAC_Align_8b_R)) +/** + * @} + */ + +/** @defgroup DAC_wave_generation + * @{ + */ + +#define DAC_Wave_Noise ((uint32_t)0x00000040) +#define DAC_Wave_Triangle ((uint32_t)0x00000080) +#define IS_DAC_WAVE(WAVE) (((WAVE) == DAC_Wave_Noise) || \ + ((WAVE) == DAC_Wave_Triangle)) +/** + * @} + */ + +/** @defgroup DAC_data + * @{ + */ + +#define IS_DAC_DATA(DATA) ((DATA) <= 0xFFF0) +/** + * @} + */ + +/** @defgroup DAC_interrupts_definition + * @{ + */ +#define DAC_IT_DMAUDR ((uint32_t)0x00002000) +#define IS_DAC_IT(IT) (((IT) == DAC_IT_DMAUDR)) + +/** + * @} + */ + +/** @defgroup DAC_flags_definition + * @{ + */ + +#define DAC_FLAG_DMAUDR ((uint32_t)0x00002000) +#define IS_DAC_FLAG(FLAG) (((FLAG) == DAC_FLAG_DMAUDR)) + +/** + * @} + */ + +/** + * @} + */ + +/* Exported macro ------------------------------------------------------------*/ +/* Exported functions --------------------------------------------------------*/ + +/* Function used to set the DAC configuration to the default reset state *****/ +void DAC_DeInit(void); + +/* DAC channels configuration: trigger, output buffer, data format functions */ +void DAC_Init(uint32_t DAC_Channel, DAC_InitTypeDef* DAC_InitStruct); +void DAC_StructInit(DAC_InitTypeDef* DAC_InitStruct); +void DAC_Cmd(uint32_t DAC_Channel, FunctionalState NewState); +void DAC_SoftwareTriggerCmd(uint32_t DAC_Channel, FunctionalState NewState); +void DAC_DualSoftwareTriggerCmd(FunctionalState NewState); +void DAC_WaveGenerationCmd(uint32_t DAC_Channel, uint32_t DAC_Wave, FunctionalState NewState); +void DAC_SetChannel1Data(uint32_t DAC_Align, uint16_t Data); +void DAC_SetChannel2Data(uint32_t DAC_Align, uint16_t Data); +void DAC_SetDualChannelData(uint32_t DAC_Align, uint16_t Data2, uint16_t Data1); +uint16_t DAC_GetDataOutputValue(uint32_t DAC_Channel); + +/* DMA management functions ***************************************************/ +void DAC_DMACmd(uint32_t DAC_Channel, FunctionalState NewState); + +/* Interrupts and flags management functions **********************************/ +void DAC_ITConfig(uint32_t DAC_Channel, uint32_t DAC_IT, FunctionalState NewState); +FlagStatus DAC_GetFlagStatus(uint32_t DAC_Channel, uint32_t DAC_FLAG); +void DAC_ClearFlag(uint32_t DAC_Channel, uint32_t DAC_FLAG); +ITStatus DAC_GetITStatus(uint32_t DAC_Channel, uint32_t DAC_IT); +void DAC_ClearITPendingBit(uint32_t DAC_Channel, uint32_t DAC_IT); + +#ifdef __cplusplus +} +#endif + +#endif /*__STM32F4xx_DAC_H */ + +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ diff --git a/stm/main.c b/stm/main.c index f8f1105c1..996684cb8 100644 --- a/stm/main.c +++ b/stm/main.c @@ -20,6 +20,7 @@ #include "usart.h" #include "usb.h" #include "ff.h" +#include "audio.h" static FATFS fatfs0; @@ -745,6 +746,9 @@ soft_reset: // servo servo_init(); + // audio + audio_init(); + // add some functions to the python namespace { py_obj_t m = py_module_new(); diff --git a/stm/systick.c b/stm/systick.c index c9d37a2df..1979ea7e0 100644 --- a/stm/systick.c +++ b/stm/systick.c @@ -14,6 +14,9 @@ void sys_tick_init(void) { // called on SysTick interrupt void SysTick_Handler(void) { sys_tick_counter++; + // hack! + void audio_drain(void); + audio_drain(); } void sys_tick_delay_ms(uint32_t delay_ms) {