写一段c语言代码使esp32输出512fs时钟信号到pcm1808
时间: 2023-07-31 22:13:41 浏览: 43
以下是一段C语言的代码,可以将ESP32输出512fs时钟信号到PCM1808:
```c
#include "driver/i2s.h"
void app_main(void)
{
// 配置I2S接口
i2s_config_t i2s_config = {
.mode = I2S_MODE_MASTER | I2S_MODE_TX,
.sample_rate = 51200,
.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
.channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
.communication_format = I2S_COMM_FORMAT_I2S,
.dma_buf_count = 8,
.dma_buf_len = 64,
.use_apll = true,
.tx_desc_auto_clear = true,
};
i2s_pin_config_t pin_config = {
.bck_io_num = 26,
.ws_io_num = 25,
.data_out_num = 22,
.data_in_num = I2S_PIN_NO_CHANGE,
};
i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL);
i2s_set_pin(I2S_NUM_0, &pin_config);
// 开始I2S传输
i2s_zero_dma_buffer(I2S_NUM_0);
i2s_start(I2S_NUM_0);
// 循环输出时钟信号
while (true) {
uint16_t data = 0x0000;
i2s_write(I2S_NUM_0, &data, sizeof(data), portMAX_DELAY);
}
}
```
这段代码通过I2S接口向PCM1808输出时钟信号,其中的`sample_rate`参数设置为51200,即表示512fs的时钟频率。在循环中,每次向I2S接口写入一个16位的数据0x0000,即可输出时钟信号到PCM1808。