first commit

project/inc/driver/i2s_freertos.h

@@ -0,0 +1,46 @@
+#ifndef _I2S_FREERTOS_H_
+#define _I2S_FREERTOS_H_
+
+#include "i2s_api.h"
+#include "user/playerconfig.h"
+
+#define I2S_DMA_PAGE_WAIT_MS_MIN 	4 // 8 // min 2 ms (CPU CLK 166), min 4 ms (CPU CLK 83),
+#define I2S_DMA_PAGE_SIZE_MS_96K	(96000/1000) // in sizeof(u32)
+#define I2S_DMA_PAGE_NUM    		4   // Valid number is 2~4
+
+#define I2S0_SCLK_PIN            PE_1 // PD_1
+#define I2S0_WS_PIN              PE_0 // PD_0
+#define I2S0_SD_PIN              PE_2 // PD_2
+
+#define I2S1_SCLK_PIN            PC_1
+#define I2S1_WS_PIN              PC_0
+#define I2S1_SD_PIN              PC_2
+
+#define I2S_DEBUG_LEVEL 0
+
+typedef struct _I2S_OBJS_ {
+	i2s_t i2s_obj;
+	u32 *currDMABuff;	// Current DMA buffer we're writing to
+	u32 currDMABuffPos;	// Current position in that DMA buffer
+	s32 sampl_err;
+#if I2S_DEBUG_LEVEL > 1
+	u32 underrunCnt;	// DMA underrun counter
+#endif
+}I2S_OBJS, *PI2S_OBJS;
+
+#define MAX_I2S_OBJS 2
+#define I2S0_OBJSN 0
+#define I2S1_OBJSN 1
+
+//extern PI2S_OBJS pi2s[MAX_I2S_OBJS]; // I2S0, I2S1
+
+int i2sInit(int mask, int bufsize, int word_len); // word_len = WL_16b or WL_24b
+void i2sClose(int mask);
+char i2sSetRate(int mask, int rate);
+u32 i2sPushPWMSamples(u32 sample);
+
+#if I2S_DEBUG_LEVEL > 1
+long i2sGetUnderrunCnt(int num);
+#endif
+
+#endif