95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
#include <stdint.h>
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#include <string.h>
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#include <stdbool.h>
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#include "freertos/xtensa_api.h"
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#include "freertos/FreeRTOSConfig.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/queue.h"
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#include "freertos/task.h"
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#include "esp_log.h"
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#include "driver/i2s.h"
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#include "freertos/ringbuf.h"
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static xTaskHandle h2201_i2s_task_handle = NULL;
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static RingbufHandle_t h2201_i2s_ringbuffer_handle = NULL;
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static const int i2s_num = 0; // i2s port number
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static void h2201_i2s_task(void *arg)
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{
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uint8_t *data = NULL;
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size_t item_size = 0;
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size_t bytes_written = 0;
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for (;;)
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{
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data = (uint8_t *)xRingbufferReceive(h2201_i2s_ringbuffer_handle, &item_size, (portTickType)portMAX_DELAY);
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if (item_size != 0)
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{
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i2s_write(0, data, item_size, &bytes_written, portMAX_DELAY);
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vRingbufferReturnItem(h2201_i2s_ringbuffer_handle, (void *)data);
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}
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}
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}
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void h2201_i2s_task_start_up(void)
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{
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h2201_i2s_ringbuffer_handle = xRingbufferCreate(8 * 1024, RINGBUF_TYPE_BYTEBUF);
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if (h2201_i2s_ringbuffer_handle == NULL)
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{
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return;
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}
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xTaskCreate(h2201_i2s_task, "BtI2ST", 1024, NULL, configMAX_PRIORITIES - 3, &h2201_i2s_task_handle);
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return;
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}
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void h2201_i2s_task_shut_down(void)
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{
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if (h2201_i2s_task_handle)
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{
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vTaskDelete(h2201_i2s_task_handle);
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h2201_i2s_task_handle = NULL;
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}
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if (h2201_i2s_ringbuffer_handle)
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{
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vRingbufferDelete(h2201_i2s_ringbuffer_handle);
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h2201_i2s_ringbuffer_handle = NULL;
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}
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}
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void h2201_i2s_write_ringbuf(const uint8_t *data, uint32_t size)
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{
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xRingbufferSend(h2201_i2s_ringbuffer_handle, (void *)data, size, (portTickType)portMAX_DELAY);
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}
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void h2201_i2s_set_samplerate(int sample_rate)
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{
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i2s_set_clk(i2s_num, sample_rate, 16, 2);
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}
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void h2201_i2s_init(void)
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{
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i2s_config_t i2s_config = {
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.mode = I2S_MODE_MASTER | I2S_MODE_TX, // Only TX
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.sample_rate = 48000,
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.bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,
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.channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT, // 2-channels
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//.channel_format = I2S_CHANNEL_FMT_MULTIPLE, // multi channel
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.communication_format = I2S_COMM_FORMAT_STAND_I2S,
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.dma_buf_count = 8,
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.dma_buf_len = 64,
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.intr_alloc_flags = 0, // Default interrupt priority
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.use_apll = true,
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.tx_desc_auto_clear = true // Auto clear tx descriptor on underflow
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//.chan_mask = I2S_TDM_ACTIVE_CH0 | I2S_TDM_ACTIVE_CH1
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};
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i2s_driver_install(i2s_num, &i2s_config, 0, NULL);
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i2s_pin_config_t pin_config = {
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.bck_io_num = 25,
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.ws_io_num = 26,
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.data_out_num = 33,
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.data_in_num = I2S_PIN_NO_CHANGE};
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i2s_set_pin(i2s_num, &pin_config);
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} |