46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
#pragma once
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#include "sdkconfig.h" // this sets useful config symbols, like CONFIG_IDF_TARGET_ESP32C3
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#ifndef CONFIG_SOC_RMT_TX_CANDIDATES_PER_GROUP // turn this off with something new from idf5.1
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// ESP32C3 I2S is not supported yet due to significant changes to interface
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#if defined(ARDUINO_ARCH_ESP32) && !defined(CONFIG_IDF_TARGET_ESP32C3) && !defined(CONFIG_IDF_TARGET_ESP32C2)
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "esp_err.h"
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#define I2S_DMA_MAX_DATA_LEN 4092// maximum bytes in one dma item
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typedef enum {
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I2S_CHAN_STEREO, I2S_CHAN_RIGHT_TO_LEFT, I2S_CHAN_LEFT_TO_RIGHT, I2S_CHAN_RIGHT_ONLY, I2S_CHAN_LEFT_ONLY
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} i2s_tx_chan_mod_t;
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typedef enum {
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I2S_FIFO_16BIT_DUAL, I2S_FIFO_16BIT_SINGLE, I2S_FIFO_32BIT_DUAL, I2S_FIFO_32BIT_SINGLE
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} i2s_tx_fifo_mod_t;
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void i2sInit(uint8_t bus_num,
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uint32_t bits_per_sample,
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uint32_t sample_rate,
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i2s_tx_chan_mod_t chan_mod,
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i2s_tx_fifo_mod_t fifo_mod,
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size_t dma_count,
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size_t dma_len);
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void i2sSetPins(uint8_t bus_num, int8_t out, bool invert);
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esp_err_t i2sSetClock(uint8_t bus_num, uint8_t div_num, uint8_t div_b, uint8_t div_a, uint8_t bck, uint8_t bits_per_sample);
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esp_err_t i2sSetSampleRate(uint8_t bus_num, uint32_t sample_rate, uint8_t bits_per_sample);
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size_t i2sWrite(uint8_t bus_num, uint8_t* data, size_t len, bool copy, bool free_when_sent);
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bool i2sWriteDone(uint8_t bus_num);
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif // ESP_IDF_VERSION_MAJOR < 5
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