ST / Mbed OS DISCO_H747I_AUDIO_demo

AUDIO loopback with DISCO_H747I

Dependencies:   BSP_DISCO_H747I

Building

hg clone https://mbed.org/teams/ST/code/DISCO_H747I_AUDIO_demo

cd DISCO_H747I_AUDIO_demo

mbed deploy

mbed compile -m DISCO_H747I -t <GCC_ARM/ARM/IAR> -f

Running

A single printf is done at main start

Audio is recorded from board micro (U21) next to joystick.

Audio output is the jack connector (CN11) (green one).

Warning

Audio configuration is not compatible with Ethernet HW patch

https://os.mbed.com/teams/ST/wiki/DISCO_H747I-modifications-for-Ethernet

main.cpp@0:78e37c7585e6, 2019-11-07 (annotated)

Committer:
Jerome Coutant
Date:
Thu Nov 07 11:33:58 2019 +0100
Revision:
0:78e37c7585e6
First commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Jerome Coutant 0:78e37c7585e6 1 #include "mbed.h"
Jerome Coutant 0:78e37c7585e6 2 #include "stm32h747i_discovery.h"
Jerome Coutant 0:78e37c7585e6 3 #include "stm32h747i_discovery_audio.h"
Jerome Coutant 0:78e37c7585e6 4
Jerome Coutant 0:78e37c7585e6 5 extern "C" {
Jerome Coutant 0:78e37c7585e6 6
Jerome Coutant 0:78e37c7585e6 7 /* Audio frequency */
Jerome Coutant 0:78e37c7585e6 8 #define AUDIO_FREQUENCY BSP_AUDIO_FREQUENCY_16K
Jerome Coutant 0:78e37c7585e6 9 #define AUDIO_IN_PDM_BUFFER_SIZE (uint32_t)(128*AUDIO_FREQUENCY/16000*DEFAULT_AUDIO_IN_CHANNEL_NBR)
Jerome Coutant 0:78e37c7585e6 10
Jerome Coutant 0:78e37c7585e6 11 /* Size of the recorder buffer */
Jerome Coutant 0:78e37c7585e6 12 #define RECORD_BUFFER_SIZE 4096
Jerome Coutant 0:78e37c7585e6 13
Jerome Coutant 0:78e37c7585e6 14 /* Define record Buf at D3SRAM @0x38000000 since the BDMA for SAI4 use only this memory */
Jerome Coutant 0:78e37c7585e6 15 #if defined (TOOLCHAIN_IAR) /* IAR */
Jerome Coutant 0:78e37c7585e6 16 /* No need to update linker script */
Jerome Coutant 0:78e37c7585e6 17 #pragma location=0x38000000
Jerome Coutant 0:78e37c7585e6 18 uint16_t recordPDMBuf[AUDIO_IN_PDM_BUFFER_SIZE];
Jerome Coutant 0:78e37c7585e6 19 #else /* GCC_ARM and ARM */
Jerome Coutant 0:78e37c7585e6 20 /* Linker scripts need to be updated to add RAM_D3 section */
Jerome Coutant 0:78e37c7585e6 21 ALIGN_32BYTES(uint16_t recordPDMBuf[AUDIO_IN_PDM_BUFFER_SIZE]) __attribute__((section(".RAM_D3")));
Jerome Coutant 0:78e37c7585e6 22 #endif
Jerome Coutant 0:78e37c7585e6 23
Jerome Coutant 0:78e37c7585e6 24 uint16_t playbackBuf[RECORD_BUFFER_SIZE * 2];
Jerome Coutant 0:78e37c7585e6 25
Jerome Coutant 0:78e37c7585e6 26 /* Pointer to record_data */
Jerome Coutant 0:78e37c7585e6 27 uint32_t playbackPtr;
Jerome Coutant 0:78e37c7585e6 28
Jerome Coutant 0:78e37c7585e6 29 extern SAI_HandleTypeDef haudio_out_sai;
Jerome Coutant 0:78e37c7585e6 30 extern SAI_HandleTypeDef haudio_in_sai;
Jerome Coutant 0:78e37c7585e6 31
Jerome Coutant 0:78e37c7585e6 32
Jerome Coutant 0:78e37c7585e6 33 /**
Jerome Coutant 0:78e37c7585e6 34 * @brief This function handles DMA2 Stream 1 interrupt request.
Jerome Coutant 0:78e37c7585e6 35 * @param None
Jerome Coutant 0:78e37c7585e6 36 * @retval None
Jerome Coutant 0:78e37c7585e6 37 */
Jerome Coutant 0:78e37c7585e6 38 void AUDIO_OUT_SAIx_DMAx_IRQHandler(void)
Jerome Coutant 0:78e37c7585e6 39 /* DMA2_Stream1_IRQHandler redefinition in BSP_DISCO_H747I/STM32H747I-Discovery/stm32h747i_discovery_audio.h */
Jerome Coutant 0:78e37c7585e6 40 {
Jerome Coutant 0:78e37c7585e6 41 HAL_DMA_IRQHandler(haudio_out_sai.hdmatx);
Jerome Coutant 0:78e37c7585e6 42 }
Jerome Coutant 0:78e37c7585e6 43
Jerome Coutant 0:78e37c7585e6 44
Jerome Coutant 0:78e37c7585e6 45 /**
Jerome Coutant 0:78e37c7585e6 46 * @brief This function handles BDMA Channel 1 for SAI_PDM interrupt request.
Jerome Coutant 0:78e37c7585e6 47 * @param None
Jerome Coutant 0:78e37c7585e6 48 * @retval None
Jerome Coutant 0:78e37c7585e6 49 */
Jerome Coutant 0:78e37c7585e6 50 void AUDIO_IN_SAI_PDMx_DMAx_IRQHandler(void)
Jerome Coutant 0:78e37c7585e6 51 /* BDMA_Channel1_IRQHandler redefinition in BSP_DISCO_H747I/STM32H747I-Discovery/stm32h747i_discovery_audio.h */
Jerome Coutant 0:78e37c7585e6 52 {
Jerome Coutant 0:78e37c7585e6 53 HAL_DMA_IRQHandler(haudio_in_sai.hdmarx);
Jerome Coutant 0:78e37c7585e6 54 }
Jerome Coutant 0:78e37c7585e6 55
Jerome Coutant 0:78e37c7585e6 56
Jerome Coutant 0:78e37c7585e6 57 /**
Jerome Coutant 0:78e37c7585e6 58 * @brief Calculates the remaining file size and new position of the pointer.
Jerome Coutant 0:78e37c7585e6 59 * @param None
Jerome Coutant 0:78e37c7585e6 60 * @retval None
Jerome Coutant 0:78e37c7585e6 61 */
Jerome Coutant 0:78e37c7585e6 62 void BSP_AUDIO_IN_TransferComplete_CallBack(void)
Jerome Coutant 0:78e37c7585e6 63 /* weak empty function in BSP_DISCO_H747I/STM32H747I-Discovery/stm32h747i_discovery_audio.c */
Jerome Coutant 0:78e37c7585e6 64 {
Jerome Coutant 0:78e37c7585e6 65 if (BSP_AUDIO_IN_GetInterface() == AUDIO_IN_INTERFACE_PDM) {
Jerome Coutant 0:78e37c7585e6 66 /* Invalidate Data Cache to get the updated content of the SRAM*/
Jerome Coutant 0:78e37c7585e6 67 SCB_InvalidateDCache_by_Addr((uint32_t *)&recordPDMBuf[AUDIO_IN_PDM_BUFFER_SIZE / 2], AUDIO_IN_PDM_BUFFER_SIZE * 2);
Jerome Coutant 0:78e37c7585e6 68
Jerome Coutant 0:78e37c7585e6 69 BSP_AUDIO_IN_PDMToPCM((uint16_t *)&recordPDMBuf[AUDIO_IN_PDM_BUFFER_SIZE / 2], &playbackBuf[playbackPtr]);
Jerome Coutant 0:78e37c7585e6 70
Jerome Coutant 0:78e37c7585e6 71 /* Clean Data Cache to update the content of the SRAM */
Jerome Coutant 0:78e37c7585e6 72 SCB_CleanDCache_by_Addr((uint32_t *)&playbackBuf[playbackPtr], AUDIO_IN_PDM_BUFFER_SIZE / 4);
Jerome Coutant 0:78e37c7585e6 73
Jerome Coutant 0:78e37c7585e6 74 playbackPtr += AUDIO_IN_PDM_BUFFER_SIZE / 4 / 2;
Jerome Coutant 0:78e37c7585e6 75 if (playbackPtr >= RECORD_BUFFER_SIZE) {
Jerome Coutant 0:78e37c7585e6 76 playbackPtr = 0;
Jerome Coutant 0:78e37c7585e6 77 }
Jerome Coutant 0:78e37c7585e6 78 }
Jerome Coutant 0:78e37c7585e6 79 }
Jerome Coutant 0:78e37c7585e6 80
Jerome Coutant 0:78e37c7585e6 81
Jerome Coutant 0:78e37c7585e6 82 /**
Jerome Coutant 0:78e37c7585e6 83 * @brief Manages the DMA Half Transfer complete interrupt.
Jerome Coutant 0:78e37c7585e6 84 * @param None
Jerome Coutant 0:78e37c7585e6 85 * @retval None
Jerome Coutant 0:78e37c7585e6 86 */
Jerome Coutant 0:78e37c7585e6 87 void BSP_AUDIO_IN_HalfTransfer_CallBack(void)
Jerome Coutant 0:78e37c7585e6 88 /* weak empty function in BSP_DISCO_H747I/STM32H747I-Discovery/stm32h747i_discovery_audio.c */
Jerome Coutant 0:78e37c7585e6 89 {
Jerome Coutant 0:78e37c7585e6 90 if (BSP_AUDIO_IN_GetInterface() == AUDIO_IN_INTERFACE_PDM) {
Jerome Coutant 0:78e37c7585e6 91 /* Invalidate Data Cache to get the updated content of the SRAM*/
Jerome Coutant 0:78e37c7585e6 92 SCB_InvalidateDCache_by_Addr((uint32_t *)&recordPDMBuf[0], AUDIO_IN_PDM_BUFFER_SIZE * 2);
Jerome Coutant 0:78e37c7585e6 93
Jerome Coutant 0:78e37c7585e6 94 BSP_AUDIO_IN_PDMToPCM((uint16_t *)&recordPDMBuf[0], &playbackBuf[playbackPtr]);
Jerome Coutant 0:78e37c7585e6 95
Jerome Coutant 0:78e37c7585e6 96 /* Clean Data Cache to update the content of the SRAM */
Jerome Coutant 0:78e37c7585e6 97 SCB_CleanDCache_by_Addr((uint32_t *)&playbackBuf[playbackPtr], AUDIO_IN_PDM_BUFFER_SIZE / 4);
Jerome Coutant 0:78e37c7585e6 98
Jerome Coutant 0:78e37c7585e6 99 playbackPtr += AUDIO_IN_PDM_BUFFER_SIZE / 4 / 2;
Jerome Coutant 0:78e37c7585e6 100 if (playbackPtr >= RECORD_BUFFER_SIZE) {
Jerome Coutant 0:78e37c7585e6 101 playbackPtr = 0;
Jerome Coutant 0:78e37c7585e6 102 }
Jerome Coutant 0:78e37c7585e6 103 }
Jerome Coutant 0:78e37c7585e6 104 }
Jerome Coutant 0:78e37c7585e6 105
Jerome Coutant 0:78e37c7585e6 106
Jerome Coutant 0:78e37c7585e6 107 /**
Jerome Coutant 0:78e37c7585e6 108 * @brief Audio IN Error callback function
Jerome Coutant 0:78e37c7585e6 109 * @param None
Jerome Coutant 0:78e37c7585e6 110 * @retval None
Jerome Coutant 0:78e37c7585e6 111 */
Jerome Coutant 0:78e37c7585e6 112 void BSP_AUDIO_IN_Error_CallBack(void)
Jerome Coutant 0:78e37c7585e6 113 /* weak empty function in BSP_DISCO_H747I/STM32H747I-Discovery/stm32h747i_discovery_audio.c */
Jerome Coutant 0:78e37c7585e6 114 {
Jerome Coutant 0:78e37c7585e6 115 MBED_ASSERT(0);
Jerome Coutant 0:78e37c7585e6 116 }
Jerome Coutant 0:78e37c7585e6 117
Jerome Coutant 0:78e37c7585e6 118 } // extern C
Jerome Coutant 0:78e37c7585e6 119
Jerome Coutant 0:78e37c7585e6 120
Jerome Coutant 0:78e37c7585e6 121 int main()
Jerome Coutant 0:78e37c7585e6 122 {
Jerome Coutant 0:78e37c7585e6 123 printf("\n\nAUDIO LOOPBACK EXAMPLE WITH AUDIO PDM FOR DISCO-H747I\n");
Jerome Coutant 0:78e37c7585e6 124
Jerome Coutant 0:78e37c7585e6 125 /* Set audio input interface */
Jerome Coutant 0:78e37c7585e6 126 BSP_AUDIO_IN_SelectInterface(AUDIO_IN_INTERFACE_PDM);
Jerome Coutant 0:78e37c7585e6 127
Jerome Coutant 0:78e37c7585e6 128 /* Initialize audio IN at REC_FREQ*/
Jerome Coutant 0:78e37c7585e6 129 if (BSP_AUDIO_IN_InitEx(INPUT_DEVICE_DIGITAL_MIC, AUDIO_FREQUENCY, DEFAULT_AUDIO_IN_BIT_RESOLUTION, DEFAULT_AUDIO_IN_CHANNEL_NBR) != AUDIO_OK) {
Jerome Coutant 0:78e37c7585e6 130 /* Record Error */
Jerome Coutant 0:78e37c7585e6 131 MBED_ASSERT(0);
Jerome Coutant 0:78e37c7585e6 132 }
Jerome Coutant 0:78e37c7585e6 133
Jerome Coutant 0:78e37c7585e6 134 /* Initialize audio OUT at REC_FREQ*/
Jerome Coutant 0:78e37c7585e6 135 if (BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_HEADPHONE, 50, AUDIO_FREQUENCY) != AUDIO_OK) {
Jerome Coutant 0:78e37c7585e6 136 /* Record Error */
Jerome Coutant 0:78e37c7585e6 137 MBED_ASSERT(0);
Jerome Coutant 0:78e37c7585e6 138 }
Jerome Coutant 0:78e37c7585e6 139
Jerome Coutant 0:78e37c7585e6 140 /* Set audio slot */
Jerome Coutant 0:78e37c7585e6 141 BSP_AUDIO_OUT_SetAudioFrameSlot(CODEC_AUDIOFRAME_SLOT_02);
Jerome Coutant 0:78e37c7585e6 142
Jerome Coutant 0:78e37c7585e6 143 /* Start the record */
Jerome Coutant 0:78e37c7585e6 144 BSP_AUDIO_IN_Record((uint16_t *)recordPDMBuf, AUDIO_IN_PDM_BUFFER_SIZE);
Jerome Coutant 0:78e37c7585e6 145
Jerome Coutant 0:78e37c7585e6 146 wait_us(1000); // 1 ms
Jerome Coutant 0:78e37c7585e6 147
Jerome Coutant 0:78e37c7585e6 148 /* Start audio output */
Jerome Coutant 0:78e37c7585e6 149 BSP_AUDIO_OUT_Play((uint16_t *)playbackBuf, RECORD_BUFFER_SIZE * 2);
Jerome Coutant 0:78e37c7585e6 150 }