diff options
Diffstat (limited to 'code/esp32/components/eos/cell_pcm.c')
| -rw-r--r-- | code/esp32/components/eos/cell_pcm.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/code/esp32/components/eos/cell_pcm.c b/code/esp32/components/eos/cell_pcm.c new file mode 100644 index 0000000..c1419b8 --- /dev/null +++ b/code/esp32/components/eos/cell_pcm.c @@ -0,0 +1,258 @@ +#include <stdlib.h> +#include <string.h> + +#include <freertos/FreeRTOS.h> +#include <freertos/semphr.h> +#include <freertos/task.h> +#include <freertos/queue.h> +#include <driver/i2s.h> +#include <driver/gpio.h> +#include <esp_log.h> + +#include "eos.h" +#include "net.h" +#include "msgq.h" +#include "cell.h" + +#define PCM_MIC_WM 128 +#define PCM_HOLD_CNT_TX 3 +#define PCM_HOLD_CNT_RX 3 +#define PCM_SIZE_BUFQ 4 +#define PCM_SIZE_BUF (PCM_MIC_WM * 4) + +#define PCM_GPIO_BCK 33 +#define PCM_GPIO_WS 4 +#define PCM_GPIO_DIN 34 +#define PCM_GPIO_DOUT 2 + +#define PCM_ETYPE_WRITE 1 + +static EOSBufQ pcm_buf_q; +static unsigned char *pcm_bufq_array[PCM_SIZE_BUFQ]; + +static EOSMsgQ pcm_evt_q; +static EOSMsgItem pcm_evtq_array[PCM_SIZE_BUFQ]; +static char pcm_hold_tx; + +static i2s_dev_t* I2S[I2S_NUM_MAX] = {&I2S0, &I2S1}; + +static QueueHandle_t i2s_queue; +static SemaphoreHandle_t mutex; + +static const char *TAG = "EOS PCM"; + +static void i2s_event_task(void *pvParameters) { + i2s_event_t event; + unsigned char *buf; + unsigned char _type; + size_t bytes_w; + ssize_t bytes_r; + uint16_t bytes_e; + ssize_t hold_bytes_r = 0; + unsigned char *hold_buf = NULL; + char hold_cnt = 0; + + while (1) { + // Waiting for I2S event. + if (xQueueReceive(i2s_queue, &event, portMAX_DELAY)) { + switch (event.type) { + case I2S_EVENT_RX_DONE: + // Event of I2S receiving data + if (!hold_cnt) { + buf = eos_net_alloc(); + buf[0] = EOS_CELL_MTYPE_AUDIO; + bytes_r = eos_pcm_read(buf + 1, PCM_MIC_WM); + eos_net_send(EOS_NET_MTYPE_CELL, buf, bytes_r + 1, 0); + } else { + hold_cnt--; + if (hold_buf == NULL) { + hold_buf = eos_net_alloc(); + hold_buf[0] = EOS_CELL_MTYPE_AUDIO; + } + if (1 + hold_bytes_r + PCM_MIC_WM <= EOS_NET_SIZE_BUF) hold_bytes_r += eos_pcm_read(hold_buf + 1 + hold_bytes_r, PCM_MIC_WM); + if (hold_cnt == 0) { + eos_net_send(EOS_NET_MTYPE_CELL, hold_buf, hold_bytes_r + 1, 0); + hold_bytes_r = 0; + hold_buf = NULL; + } + } + + buf = NULL; + xSemaphoreTake(mutex, portMAX_DELAY); + if (pcm_hold_tx && (eos_msgq_len(&pcm_evt_q) == PCM_HOLD_CNT_TX)) pcm_hold_tx = 0; + if (!pcm_hold_tx) eos_msgq_pop(&pcm_evt_q, &_type, &buf, &bytes_e, NULL); + xSemaphoreGive(mutex); + + if (buf) { + i2s_write(I2S_NUM_0, (const void *)buf, bytes_e, &bytes_w, portMAX_DELAY); + xSemaphoreTake(mutex, portMAX_DELAY); + eos_bufq_push(&pcm_buf_q, buf); + xSemaphoreGive(mutex); + } + break; + case I2S_EVENT_DMA_ERROR: + ESP_LOGE(TAG, "*** I2S DMA ERROR ***"); + break; + case I2S_EVENT_MAX: + hold_cnt = PCM_HOLD_CNT_RX; + break; + default: + break; + } + } + } + vTaskDelete(NULL); +} + +void eos_pcm_init(void) { + int i; + + i2s_config_t i2s_config = { + .mode = I2S_MODE_SLAVE | I2S_MODE_TX | I2S_MODE_RX, + .sample_rate = 32000, + .bits_per_sample = 32, + .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT, + .communication_format = I2S_COMM_FORMAT_I2S, + .dma_buf_count = 4, + .dma_buf_len = PCM_MIC_WM, + .use_apll = true, + .fixed_mclk = 2048000 * 8, + .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1 + }; + + i2s_pin_config_t pin_config = { + .bck_io_num = PCM_GPIO_BCK, + .ws_io_num = PCM_GPIO_WS, + .data_in_num = PCM_GPIO_DIN, + .data_out_num = PCM_GPIO_DOUT + }; + i2s_driver_install(I2S_NUM_0, &i2s_config, 10, &i2s_queue); //install and start i2s driver + i2s_stop(I2S_NUM_0); + i2s_set_pin(I2S_NUM_0, &pin_config); + gpio_matrix_in(pin_config.ws_io_num, I2S0I_WS_IN_IDX, 1); + gpio_matrix_in(pin_config.bck_io_num, I2S0I_BCK_IN_IDX, 1); + ESP_LOGI(TAG, "TX FIFO:%d TX CHAN:%d RX FIFO:%d RX CHAN:%d", I2S[I2S_NUM_0]->fifo_conf.tx_fifo_mod, I2S[I2S_NUM_0]->conf_chan.tx_chan_mod, I2S[I2S_NUM_0]->fifo_conf.rx_fifo_mod, I2S[I2S_NUM_0]->conf_chan.rx_chan_mod); + + I2S[I2S_NUM_0]->fifo_conf.tx_fifo_mod = 2; + I2S[I2S_NUM_0]->conf_chan.tx_chan_mod = 0; + + I2S[I2S_NUM_0]->fifo_conf.rx_fifo_mod = 3; + I2S[I2S_NUM_0]->conf_chan.rx_chan_mod = 1; + // I2S[I2S_NUM_0]->conf.tx_mono = 1; + I2S[I2S_NUM_0]->conf.rx_mono = 1; + // I2S[I2S_NUM_0]->timing.tx_dsync_sw = 1 + // I2S[I2S_NUM_0]->timing.rx_dsync_sw = 1 + // I2S[I2S_NUM_0]->conf.sig_loopback = 0; + + // I2S[I2S_NUM_0]->timing.tx_bck_in_inv = 1; + + eos_msgq_init(&pcm_evt_q, pcm_evtq_array, PCM_SIZE_BUFQ); + eos_bufq_init(&pcm_buf_q, pcm_bufq_array, PCM_SIZE_BUFQ); + for (i=0; i<PCM_SIZE_BUFQ; i++) { + eos_bufq_push(&pcm_buf_q, malloc(PCM_SIZE_BUF)); + } + + mutex = xSemaphoreCreateBinary(); + xSemaphoreGive(mutex); + + // Create a task to handle i2s event from ISR + xTaskCreate(i2s_event_task, "i2s_event", EOS_TASK_SSIZE_I2S, NULL, EOS_TASK_PRIORITY_I2S, NULL); + ESP_LOGI(TAG, "INIT"); +} + +ssize_t eos_pcm_read(unsigned char *data, size_t size) { + static unsigned char buf[PCM_SIZE_BUF]; + size_t bytes_r; + int i; + + if (size > PCM_MIC_WM) return EOS_ERR; + + esp_err_t ret = i2s_read(I2S_NUM_0, (void *)buf, size * 4, &bytes_r, portMAX_DELAY); + if (ret != ESP_OK) return EOS_ERR; + + for (i=0; i<size/2; i++) { + data[i * 2] = buf[i * 8 + 3]; + data[i * 2 + 1] = buf[i * 8 + 2]; + } + + return bytes_r / 4; +} + +ssize_t eos_pcm_expand(unsigned char *buf, unsigned char *data, size_t size) { + int i; + + if (size > PCM_MIC_WM) return EOS_ERR; + + memset(buf, 0, PCM_SIZE_BUF); + for (i=0; i<size/2; i++) { + buf[i * 8 + 3] = data[i * 2]; + buf[i * 8 + 2] = data[i * 2 + 1]; + } + + return size * 4; +} + +int eos_pcm_push(unsigned char *data, size_t size) { + unsigned char *buf = NULL; + ssize_t esize; + int rv; + + if (size > PCM_MIC_WM) return EOS_ERR; + + xSemaphoreTake(mutex, portMAX_DELAY); + if (pcm_hold_tx && (eos_msgq_len(&pcm_evt_q) == PCM_HOLD_CNT_TX)) { + unsigned char _type; + uint16_t _len; + + eos_msgq_pop(&pcm_evt_q, &_type, &buf, &_len, NULL); + } else { + buf = eos_bufq_pop(&pcm_buf_q); + } + xSemaphoreGive(mutex); + + if (buf == NULL) return EOS_ERR_EMPTY; + + esize = eos_pcm_expand(buf, data, size); + if (esize < 0) { + xSemaphoreTake(mutex, portMAX_DELAY); + eos_bufq_push(&pcm_buf_q, buf); + xSemaphoreGive(mutex); + return esize; + } + + xSemaphoreTake(mutex, portMAX_DELAY); + rv = eos_msgq_push(&pcm_evt_q, PCM_ETYPE_WRITE, buf, esize, 0); + if (rv) eos_bufq_push(&pcm_buf_q, buf); + xSemaphoreGive(mutex); + + return rv; +} + +void eos_pcm_start(void) { + i2s_event_t evt; + + xSemaphoreTake(mutex, portMAX_DELAY); + while (1) { + unsigned char _type; + unsigned char *buf; + uint16_t len; + + eos_msgq_pop(&pcm_evt_q, &_type, &buf, &len, NULL); + if (buf) { + eos_bufq_push(&pcm_buf_q, buf); + } else { + break; + } + } + pcm_hold_tx = 1; + xSemaphoreGive(mutex); + + evt.type = I2S_EVENT_MAX; /* my type */ + xQueueSend(i2s_queue, &evt, portMAX_DELAY); + i2s_zero_dma_buffer(I2S_NUM_0); + i2s_start(I2S_NUM_0); +} + +void eos_pcm_stop(void) { + i2s_stop(I2S_NUM_0); +} |