Daniel Lee / Mbed OS DISCO_F413ZH-AUDIO-demo

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Dependencies:   BSP_DISCO_F413ZH

main.cpp@2:897f21ef78e3, 2020-01-31 (annotated)

Committer:
Daniel_Lee
Date:
Fri Jan 31 07:22:32 2020 +0000
Revision:
2:897f21ef78e3
Parent:
1:1025d8dcf8ec 
Patched for Audio example

Who changed what in which revision?

UserRevisionLine numberNew contents of line
arostm 0:adbe8684bb7c 1 #include "mbed.h"
Daniel_Lee 2:897f21ef78e3 2 #include "stm32f413h_discovery_audio.h"
Daniel_Lee 2:897f21ef78e3 3
Daniel_Lee 2:897f21ef78e3 4 static void CopyBuffer(int16_t *pbuffer1, int16_t *pbuffer2, uint16_t BufferSize);
Daniel_Lee 2:897f21ef78e3 5
Daniel_Lee 2:897f21ef78e3 6 #define SCRATCH_BUFF_SIZE 1024
Daniel_Lee 2:897f21ef78e3 7 #define RECORD_BUFFER_SIZE 4096
Daniel_Lee 2:897f21ef78e3 8
Daniel_Lee 2:897f21ef78e3 9 typedef enum {
Daniel_Lee 2:897f21ef78e3 10 BUFFER_OFFSET_NONE = 0,
Daniel_Lee 2:897f21ef78e3 11 BUFFER_OFFSET_HALF = 1,
Daniel_Lee 2:897f21ef78e3 12 BUFFER_OFFSET_FULL = 2,
Daniel_Lee 2:897f21ef78e3 13 } BUFFER_StateTypeDef;
Daniel_Lee 2:897f21ef78e3 14
Daniel_Lee 2:897f21ef78e3 15 volatile uint32_t audio_rec_buffer_state = BUFFER_OFFSET_NONE;
Daniel_Lee 2:897f21ef78e3 16 int32_t Scratch[SCRATCH_BUFF_SIZE];
Daniel_Lee 2:897f21ef78e3 17
Daniel_Lee 2:897f21ef78e3 18 /* Buffer containing the PCM samples coming from the microphone */
Daniel_Lee 2:897f21ef78e3 19 int16_t RecordBuffer[RECORD_BUFFER_SIZE];
Daniel_Lee 2:897f21ef78e3 20
Daniel_Lee 2:897f21ef78e3 21 /* Buffer used to stream the recorded PCM samples towards the audio codec. */
Daniel_Lee 2:897f21ef78e3 22 int16_t PlaybackBuffer[RECORD_BUFFER_SIZE];
bcostm 1:1025d8dcf8ec 23
arostm 0:adbe8684bb7c 24 int main()
arostm 0:adbe8684bb7c 25 {
Daniel_Lee 2:897f21ef78e3 26 printf("\n\nAUDIO LOOPBACK EXAMPLE FOR DISCO-F413H START:\n");
Daniel_Lee 2:897f21ef78e3 27
Daniel_Lee 2:897f21ef78e3 28 /* Initialize Audio Recorder with 2 microphone of DISCO-F413H to be used */
Daniel_Lee 2:897f21ef78e3 29 if (BSP_AUDIO_IN_Init(DEFAULT_AUDIO_IN_FREQ, DEFAULT_AUDIO_IN_BIT_RESOLUTION, DEFAULT_AUDIO_IN_CHANNEL_NBR) == AUDIO_ERROR) {
Daniel_Lee 2:897f21ef78e3 30 printf("BSP_AUDIO_IN_Init error\n");
Daniel_Lee 2:897f21ef78e3 31 }
Daniel_Lee 2:897f21ef78e3 32 printf("Audio init done..\n");
arostm 0:adbe8684bb7c 33
Daniel_Lee 2:897f21ef78e3 34 /* Allocate scratch buffers */
Daniel_Lee 2:897f21ef78e3 35 if (BSP_AUDIO_IN_AllocScratch (Scratch, SCRATCH_BUFF_SIZE) == AUDIO_ERROR) {
Daniel_Lee 2:897f21ef78e3 36 printf("BSP_AUDIO_IN_AllocScratch error\n");
Daniel_Lee 2:897f21ef78e3 37 }
Daniel_Lee 2:897f21ef78e3 38 printf("Audio buffer init done..\n");
Daniel_Lee 2:897f21ef78e3 39
Daniel_Lee 2:897f21ef78e3 40 /* Start Recording */
Daniel_Lee 2:897f21ef78e3 41 if (BSP_AUDIO_IN_Record((uint16_t*)&RecordBuffer[0], RECORD_BUFFER_SIZE) == AUDIO_ERROR) {
Daniel_Lee 2:897f21ef78e3 42 printf("BSP_AUDIO_IN_Record error\n");
Daniel_Lee 2:897f21ef78e3 43 }
Daniel_Lee 2:897f21ef78e3 44 printf("Audio in(Microphone U16, U17) recording start..\n");
bcostm 1:1025d8dcf8ec 45
Daniel_Lee 2:897f21ef78e3 46 /* Initialize the audio device*/
Daniel_Lee 2:897f21ef78e3 47 if (BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_HEADPHONE, 50, DEFAULT_AUDIO_IN_FREQ) == AUDIO_ERROR) {
Daniel_Lee 2:897f21ef78e3 48 printf("BSP_AUDIO_OUT_Init error\n");
Daniel_Lee 2:897f21ef78e3 49 }
Daniel_Lee 2:897f21ef78e3 50 printf("Audio out init done..\n");
Daniel_Lee 2:897f21ef78e3 51
Daniel_Lee 2:897f21ef78e3 52 /* Play the recorded buffer */
Daniel_Lee 2:897f21ef78e3 53 if (BSP_AUDIO_OUT_Play((uint16_t *) &PlaybackBuffer[0], 2*RECORD_BUFFER_SIZE) == AUDIO_ERROR) {
Daniel_Lee 2:897f21ef78e3 54 printf("BSP_AUDIO_OUT_Play error\n");
Daniel_Lee 2:897f21ef78e3 55 }
Daniel_Lee 2:897f21ef78e3 56 printf("Start loopback (Mic -> Audio Jack)!!\n");
Daniel_Lee 2:897f21ef78e3 57
Daniel_Lee 2:897f21ef78e3 58 audio_rec_buffer_state = BUFFER_OFFSET_NONE;
bcostm 1:1025d8dcf8ec 59
Daniel_Lee 2:897f21ef78e3 60 while (1) {
Daniel_Lee 2:897f21ef78e3 61 /* 1st or 2nd half of the record buffer ready for being copied to the playback buffer */
Daniel_Lee 2:897f21ef78e3 62 if(audio_rec_buffer_state != BUFFER_OFFSET_NONE) {
Daniel_Lee 2:897f21ef78e3 63 /* Copy half of the record buffer to the playback buffer */
Daniel_Lee 2:897f21ef78e3 64 if(audio_rec_buffer_state == BUFFER_OFFSET_HALF) {
Daniel_Lee 2:897f21ef78e3 65 CopyBuffer(&PlaybackBuffer[0], &RecordBuffer[0], RECORD_BUFFER_SIZE/2);
Daniel_Lee 2:897f21ef78e3 66
Daniel_Lee 2:897f21ef78e3 67 } else { /* if(audio_rec_buffer_state == BUFFER_OFFSET_FULL)*/
Daniel_Lee 2:897f21ef78e3 68 CopyBuffer(&PlaybackBuffer[RECORD_BUFFER_SIZE/2], &RecordBuffer[RECORD_BUFFER_SIZE/2], RECORD_BUFFER_SIZE/2);
Daniel_Lee 2:897f21ef78e3 69 }
Daniel_Lee 2:897f21ef78e3 70
Daniel_Lee 2:897f21ef78e3 71 /* Wait for next data */
Daniel_Lee 2:897f21ef78e3 72 audio_rec_buffer_state = BUFFER_OFFSET_NONE;
Daniel_Lee 2:897f21ef78e3 73 }
arostm 0:adbe8684bb7c 74 }
arostm 0:adbe8684bb7c 75 }
Daniel_Lee 2:897f21ef78e3 76
Daniel_Lee 2:897f21ef78e3 77 /*-------------------------------------------------------------------------------------
Daniel_Lee 2:897f21ef78e3 78 Callbacks implementation:
Daniel_Lee 2:897f21ef78e3 79 the callbacks API are defined __weak in the stm32f413h_discovery_audio.c file
Daniel_Lee 2:897f21ef78e3 80 and their implementation should be done in the user code if they are needed.
Daniel_Lee 2:897f21ef78e3 81 Below some examples of callback implementations.
Daniel_Lee 2:897f21ef78e3 82 -------------------------------------------------------------------------------------*/
Daniel_Lee 2:897f21ef78e3 83 /**
Daniel_Lee 2:897f21ef78e3 84 * @brief Manages the DMA Transfer complete interrupt.
Daniel_Lee 2:897f21ef78e3 85 * @param None
Daniel_Lee 2:897f21ef78e3 86 * @retval None
Daniel_Lee 2:897f21ef78e3 87 */
Daniel_Lee 2:897f21ef78e3 88 void BSP_AUDIO_IN_TransferComplete_CallBack(void)
Daniel_Lee 2:897f21ef78e3 89 {
Daniel_Lee 2:897f21ef78e3 90 audio_rec_buffer_state = BUFFER_OFFSET_FULL;
Daniel_Lee 2:897f21ef78e3 91 }
Daniel_Lee 2:897f21ef78e3 92
Daniel_Lee 2:897f21ef78e3 93 /**
Daniel_Lee 2:897f21ef78e3 94 * @brief Manages the DMA Half Transfer complete interrupt.
Daniel_Lee 2:897f21ef78e3 95 * @param None
Daniel_Lee 2:897f21ef78e3 96 * @retval None
Daniel_Lee 2:897f21ef78e3 97 */
Daniel_Lee 2:897f21ef78e3 98 void BSP_AUDIO_IN_HalfTransfer_CallBack(void)
Daniel_Lee 2:897f21ef78e3 99 {
Daniel_Lee 2:897f21ef78e3 100 audio_rec_buffer_state = BUFFER_OFFSET_HALF;
Daniel_Lee 2:897f21ef78e3 101 }
Daniel_Lee 2:897f21ef78e3 102
Daniel_Lee 2:897f21ef78e3 103 /**
Daniel_Lee 2:897f21ef78e3 104 * @brief Audio IN Error callback function.
Daniel_Lee 2:897f21ef78e3 105 * @param None
Daniel_Lee 2:897f21ef78e3 106 * @retval None
Daniel_Lee 2:897f21ef78e3 107 */
Daniel_Lee 2:897f21ef78e3 108 void BSP_AUDIO_IN_Error_CallBack(void)
Daniel_Lee 2:897f21ef78e3 109 {
Daniel_Lee 2:897f21ef78e3 110 printf("BSP_AUDIO_IN_Error_CallBack\n");
Daniel_Lee 2:897f21ef78e3 111 }
Daniel_Lee 2:897f21ef78e3 112
Daniel_Lee 2:897f21ef78e3 113
Daniel_Lee 2:897f21ef78e3 114 /**
Daniel_Lee 2:897f21ef78e3 115 * @brief Copy content of pbuffer2 to pbuffer1
Daniel_Lee 2:897f21ef78e3 116 * @param1 BufferOut
Daniel_Lee 2:897f21ef78e3 117 * @param2 BufferIn
Daniel_Lee 2:897f21ef78e3 118 * @param3 Size
Daniel_Lee 2:897f21ef78e3 119 * @retval None
Daniel_Lee 2:897f21ef78e3 120 */
Daniel_Lee 2:897f21ef78e3 121 static void CopyBuffer(int16_t *pbuffer1, int16_t *pbuffer2, uint16_t BufferSize)
Daniel_Lee 2:897f21ef78e3 122 {
Daniel_Lee 2:897f21ef78e3 123 uint32_t i = 0;
Daniel_Lee 2:897f21ef78e3 124 for(i = 0; i < BufferSize; i++) {
Daniel_Lee 2:897f21ef78e3 125 pbuffer1[i] = pbuffer2[i];
Daniel_Lee 2:897f21ef78e3 126 }
Daniel_Lee 2:897f21ef78e3 127 }