p igmon
Part of MicroGen4 Music Synthesizer Program. (But not test it yet.) I2S ,DMA ,Stereo ,16Bit Dac(PCM1781) See detail: http://www.geocities.jp/micro_diys/index2
Now added generate Saw Wave to DAC function in generate();
You will hear Stereo saw wave sound now.
more info: http://www.geocities.jp/micro_diys/i2s_test_sample/i2s_test_sample.html
Diff: i2s_dma.cpp
- Revision:
- 0:dc88722ab141
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/i2s_dma.cpp Thu Jul 03 11:59:07 2014 +0000
@@ -0,0 +1,101 @@
+#include "synthesizer.h"
+
+extern Serial pc;
+extern DigitalOut myled;
+
+extern I2S_HandleTypeDef hi2s2;
+extern DMA_HandleTypeDef hdma_i2s2_ext_tx;
+
+
+S16 DMA_Buffer[DMA_BUFFERSIZE];
+//S16 * DMA_Buffer = (S16 *)0x20008000;
+__IO BUFFER_StateTypeDef BufferOffset = DMA_Idle;
+
+
+static const PinMap PinMap_I2S_MCK[] = {
+ {PC_6, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+// {PC_7, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NC, 0}
+};
+
+static const PinMap PinMap_I2S_CK[] = {
+ {PB_10, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PB_13, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+// {PD_3, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+// {PC_10, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NC, 0}
+};
+
+static const PinMap PinMap_I2S_WS[] = {
+ {PB_12, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PB_9, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+// {PA_15, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+ {NC, NC, 0}
+};
+
+static const PinMap PinMap_I2S_SD[] = {
+ {PC_3, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+ {PB_15, SPI_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI2)},
+// {PC_12, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_SPI3)},
+// {PD_6, SPI_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_SPI3)},
+ {NC, NC, 0}
+};
+
+
+
+void HAL_I2S_TxCpltCallback(I2S_HandleTypeDef *hi2s)
+{
+ if(hi2s->Instance == I2S2)
+ {
+ BufferOffset = DMA_FullComplete;
+ HAL_I2S_Transmit_DMA(&hi2s2, (uint16_t*)&DMA_Buffer[0], DMA_BUFFERSIZE);
+ }
+}
+
+void HAL_I2S_TxHalfCpltCallback(I2S_HandleTypeDef *hi2s)
+{
+ if(hi2s->Instance == I2S2) BufferOffset = DMA_HalfComplete;
+}
+
+
+
+void init_dmabuffer(void){
+ int16_t *ptr0 = (int16_t*)&DMA_Buffer[0];
+ for (int i =0;i < DMA_BUFFERSIZE/2 ;i++){
+ *ptr0++ = 0;// Lch
+ *ptr0++ = 0;// Rch
+ }
+}
+
+
+void i2s_dma_init(void) {
+ pinmap_pinout(PC_6, PinMap_I2S_MCK);
+ pinmap_pinout(PB_13, PinMap_I2S_CK);
+ pinmap_pinout(PB_12, PinMap_I2S_WS);
+ pinmap_pinout(PB_15, PinMap_I2S_SD);
+
+ pin_mode(PC_6, PullUp);
+ pin_mode(PB_13, PullUp);
+ pin_mode(PB_12, PullUp);
+ pin_mode(PB_15, PullUp);
+
+ init_dmabuffer();
+
+ HAL_I2S_Transmit_DMA(&hi2s2, (uint16_t *)&DMA_Buffer[0],DMA_BUFFERSIZE / 2);
+
+/* for debug */
+/*
+ pc.printf("DMA CR =%4x \n\r" ,DMA1_Stream4->CR);
+ pc.printf("DMA FCR =%4x \n\r" ,DMA1_Stream4->FCR);
+
+ pc.printf("DMA M0AR =%4x M1AR =%4x PAR = %4x \n\r" ,DMA1_Stream4->M0AR ,DMA1_Stream4->M1AR ,DMA1_Stream4->PAR);
+ pc.printf("I2S CR2 = %4x \n\r" ,SPI2->CR2);
+ pc.printf("I2S SR = %4x \n\r" ,SPI2->SR);
+ pc.printf("I2S I2SCFGR = %4x \n\r" ,SPI2->I2SCFGR);
+ pc.printf("I2S I2SPR = %4x \n\r" ,SPI2->I2SPR);
+ pc.printf("RCC->PLLI2SCFGR = %4x \n\r" ,RCC->PLLI2SCFGR);
+*/
+
+// HAL_RCC_MCOConfig(uint32_t RCC_MCO2, RCC_MCO2SOURCE_PLLI2SCLK, RCC_MCODIV_5);
+}
+