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