Revision 2:897f21ef78e3, committed 2020-01-31

Comitter:

Daniel_Lee

Date:

Fri Jan 31 07:22:32 2020 +0000

Parent:

1:1025d8dcf8ec

Child:

3:5809b93aa2b7

Commit message:

Patched for Audio example

Changed in this revision

--- a/BSP_DISCO_F413ZH.lib	Tue Sep 26 13:58:42 2017 +0000
+++ b/BSP_DISCO_F413ZH.lib	Fri Jan 31 07:22:32 2020 +0000
@@ -1,1 +1,1 @@
-https://developer.mbed.org/teams/ST/code/BSP_DISCO_F413ZH/#0f07a9ac06f7
+https://os.mbed.com/users/Daniel_Lee/code/BSP_DISCO_F413ZH/#c051317d4051

--- a/main.cpp	Tue Sep 26 13:58:42 2017 +0000
+++ b/main.cpp	Fri Jan 31 07:22:32 2020 +0000
@@ -1,20 +1,127 @@
 #include "mbed.h"
-#include "stm32f413h_discovery_lcd.h"
+#include "stm32f413h_discovery_audio.h"
+
+static void CopyBuffer(int16_t *pbuffer1, int16_t *pbuffer2, uint16_t BufferSize);
+
+#define SCRATCH_BUFF_SIZE  1024
+#define RECORD_BUFFER_SIZE  4096
+
+typedef enum {
+    BUFFER_OFFSET_NONE = 0,
+    BUFFER_OFFSET_HALF = 1,
+    BUFFER_OFFSET_FULL = 2,
+} BUFFER_StateTypeDef;
+
+volatile uint32_t  audio_rec_buffer_state = BUFFER_OFFSET_NONE;
+int32_t Scratch[SCRATCH_BUFF_SIZE];
+
+/* Buffer containing the PCM samples coming from the microphone */
+int16_t RecordBuffer[RECORD_BUFFER_SIZE];
+
+/* Buffer used to stream the recorded PCM samples towards the audio codec. */
+int16_t PlaybackBuffer[RECORD_BUFFER_SIZE];
 
 int main()
 {
-    BSP_LCD_Init();
+    printf("\n\nAUDIO LOOPBACK EXAMPLE FOR DISCO-F413H START:\n");
+
+    /* Initialize Audio Recorder with 2 microphone of DISCO-F413H to be used */
+    if (BSP_AUDIO_IN_Init(DEFAULT_AUDIO_IN_FREQ, DEFAULT_AUDIO_IN_BIT_RESOLUTION, DEFAULT_AUDIO_IN_CHANNEL_NBR) == AUDIO_ERROR) {
+        printf("BSP_AUDIO_IN_Init error\n");
+    }
+    printf("Audio init done..\n");
 
-    /* Clear the LCD */
-    BSP_LCD_Clear(LCD_COLOR_WHITE);
+    /* Allocate scratch buffers */
+    if (BSP_AUDIO_IN_AllocScratch (Scratch, SCRATCH_BUFF_SIZE) == AUDIO_ERROR) {
+        printf("BSP_AUDIO_IN_AllocScratch error\n");
+    }
+    printf("Audio buffer init done..\n");
+
+    /* Start Recording */
+    if (BSP_AUDIO_IN_Record((uint16_t*)&RecordBuffer[0], RECORD_BUFFER_SIZE) == AUDIO_ERROR) {
+        printf("BSP_AUDIO_IN_Record error\n");
+    }
+    printf("Audio in(Microphone U16, U17) recording start..\n");
 
-    BSP_LCD_DisplayStringAt(0, LINE(1), (uint8_t *)"MBED EXAMPLE", CENTER_MODE);
-    wait(2);
-    BSP_LCD_Clear(LCD_COLOR_GREEN);
-    BSP_LCD_SetBackColor(LCD_COLOR_GREEN);
-    BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
-    BSP_LCD_DisplayStringAt(0, LINE(5), (uint8_t *)"DISCOVERY STM32F413ZH", CENTER_MODE);
+    /* Initialize the audio device*/
+    if (BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_HEADPHONE, 50, DEFAULT_AUDIO_IN_FREQ) == AUDIO_ERROR) {
+        printf("BSP_AUDIO_OUT_Init error\n");
+    }
+    printf("Audio out init done..\n");
+ 
+    /* Play the recorded buffer */
+    if (BSP_AUDIO_OUT_Play((uint16_t *) &PlaybackBuffer[0], 2*RECORD_BUFFER_SIZE) == AUDIO_ERROR) {
+        printf("BSP_AUDIO_OUT_Play error\n");
+    }
+    printf("Start loopback (Mic -> Audio Jack)!!\n");
+    
+    audio_rec_buffer_state = BUFFER_OFFSET_NONE;
 
-    while(1) {
+    while (1) {
+        /* 1st or 2nd half of the record buffer ready for being copied to the playback buffer */
+        if(audio_rec_buffer_state != BUFFER_OFFSET_NONE) {
+            /* Copy half of the record buffer to the playback buffer */
+            if(audio_rec_buffer_state == BUFFER_OFFSET_HALF) {
+                CopyBuffer(&PlaybackBuffer[0], &RecordBuffer[0], RECORD_BUFFER_SIZE/2);
+                
+            } else { /* if(audio_rec_buffer_state == BUFFER_OFFSET_FULL)*/
+                CopyBuffer(&PlaybackBuffer[RECORD_BUFFER_SIZE/2], &RecordBuffer[RECORD_BUFFER_SIZE/2], RECORD_BUFFER_SIZE/2);
+            }
+
+            /* Wait for next data */
+            audio_rec_buffer_state = BUFFER_OFFSET_NONE;
+        }
     }
 }
+
+/*-------------------------------------------------------------------------------------
+       Callbacks implementation:
+           the callbacks API are defined __weak in the stm32f413h_discovery_audio.c file
+           and their implementation should be done in the user code if they are needed.
+           Below some examples of callback implementations.
+  -------------------------------------------------------------------------------------*/
+/**
+  * @brief Manages the DMA Transfer complete interrupt.
+  * @param None
+  * @retval None
+  */
+void BSP_AUDIO_IN_TransferComplete_CallBack(void)
+{
+    audio_rec_buffer_state = BUFFER_OFFSET_FULL;
+}
+
+/**
+  * @brief  Manages the DMA Half Transfer complete interrupt.
+  * @param  None
+  * @retval None
+  */
+void BSP_AUDIO_IN_HalfTransfer_CallBack(void)
+{
+    audio_rec_buffer_state = BUFFER_OFFSET_HALF;
+}
+
+/**
+  * @brief  Audio IN Error callback function.
+  * @param  None
+  * @retval None
+  */
+void BSP_AUDIO_IN_Error_CallBack(void)
+{
+    printf("BSP_AUDIO_IN_Error_CallBack\n");
+}
+
+
+/**
+  * @brief  Copy content of pbuffer2 to pbuffer1
+  * @param1 BufferOut
+  * @param2 BufferIn
+  * @param3 Size
+  * @retval None
+  */
+static void CopyBuffer(int16_t *pbuffer1, int16_t *pbuffer2, uint16_t BufferSize)
+{
+    uint32_t i = 0;
+    for(i = 0; i < BufferSize; i++) {
+        pbuffer1[i] = pbuffer2[i];
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Fri Jan 31 07:22:32 2020 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#430e64fce8098fd5e54f6de32f3f029f35dc705f

--- a/mbed.bld	Tue Sep 26 13:58:42 2017 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/675da3299148
\ No newline at end of file