Differences

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--- esp32:wm8782 [2021/05/17 21:38] – created aistis
+++ esp32:wm8782 [2021/05/18 12:33] (current) – aistis
@@ Line 1: / Line 1: @@
 WM8782 i2s ADC esp32
+https://www.cirrus.com/products/wm8782/
+{{:esp32:pasted:20210517-213851.png}}
+{{:esp32:pasted:20210517-213938.png}}
+some code that helped: https://www.esp32.com/viewtopic.php?t=3658
+<code cpp>
+#include <driver/i2s.h>
+const i2s_port_t I2S_PORT = I2S_NUM_0;
+#include "driver/mcpwm.h"
+void setup() {
+  Serial.begin(115200);
+  Serial.println("Configuring I2S...");
+  esp_err_t err;
+  int SAMPLE_RATE = 8000; //44100; //16000; //44100; //44100; // 100000; //176400; //96000; //96000;
+  const i2s_config_t i2s_config = {
+    .mode = i2s_mode_t(I2S_MODE_MASTER | I2S_MODE_RX), // Receive, not transfer
+    //.mode = i2s_mode_t(I2S_MODE_SLAVE | I2S_MODE_RX), // Receive, not transfer
+    .sample_rate =   44100, // 48000,   44100, //                      // 16KHz
+    .bits_per_sample = I2S_BITS_PER_SAMPLE_32BIT, // could only get it to work with 32bits
+    .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,
+//    .channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT, // 2-channels
+    .communication_format = (i2s_comm_format_t)(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB),
+    .intr_alloc_flags = 0,
+    .dma_buf_count = 16,
+    .dma_buf_len = 256
+  };
+  const i2s_pin_config_t pin_config = {
+    .bck_io_num = 14,   // BCKL  SCK BCLK
+    .ws_io_num = 15,    // LRCL LRCLK  FS
+    .data_out_num = -1, // not used (only for speakers)
+    .data_in_num = 32   // DOUT SD SDATA, SDIN, SDOUT, DACDAT, ADCDAT
+  };
+  // Configuring the I2S driver and pins.
+  // This function must be called before any I2S driver read/write operations.
+  err = i2s_driver_install(I2S_PORT, &i2s_config, 0, NULL);
+  if (err != ESP_OK) {
+    Serial.printf("Failed installing driver: %d\n", err);
+    while (true);
+  }
+  err = i2s_set_pin(I2S_PORT, &pin_config);
+  if (err != ESP_OK) {
+    Serial.printf("Failed setting pin: %d\n", err);
+    while (true);
+  }
+  Serial.println("I2S driver0 installed.");
+//  PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0_CLK_OUT1);
+//  WRITE_PERI_REG(PIN_CTRL, READ_PERI_REG(PIN_CTRL) & 0xFFFFFFF0);
+  REG_WRITE(PIN_CTRL, 0b111111110000);
+  PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0_CLK_OUT1);
+  //https://esp32.com/viewtopic.php?f=5&t=1585&start=10
+  //  mcpwm_gpio_init(MCPWM_UNIT_0, MCPWM0A, I2S_MCLK);
+  //  mcpwm_pin_config_t pin_config = {
+  //    .mcpwm0a_out_num = I2S_MCLK
+  //  };
+  //  mcpwm_set_pin(MCPWM_UNIT_0, &pin_config);
+  //  gpio_pulldown_en(I2S_MCLK);
+  //  mcpwm_config_t pwm_config;
+  //  pwm_config.frequency = (SAMPLE_RATE) * 256; //when frequency is too high (actually only 1MHZ)there is no signal
+  //  pwm_config.cmpr_a = 50.0;
+  //  pwm_config.cmpr_b = 50.0;
+  //  pwm_config.counter_mode = MCPWM_UP_COUNTER;
+  //  pwm_config.duty_mode = MCPWM_DUTY_MODE_0;
+  //  mcpwm_init(MCPWM_UNIT_0, MCPWM_TIMER_0, &pwm_config);
+}
+#include <iostream>
+#include <algorithm>
+#include <array>
+const int numCommunicationData = 256; //256; //1400;
+unsigned char communicationData[numCommunicationData];
+void loop() {
+  int num_bytes_read = i2s_read_bytes(I2S_NUM_0, (char *) communicationData, numCommunicationData, portMAX_DELAY);
+  //  auto maxv = *std::max_element((int32_t*)communicationData, (int32_t*)communicationData + 255 / 4);
+  //  auto minv = *std::max_element((int32_t*)communicationData, (int32_t*)communicationData + 255 / 4);
+  //  Serial.printf("%d, %d, %d\n", num_bytes_read, minv, maxv);
+  auto v1 = *((int32_t*)communicationData + 0);
+  auto v2 = *((int32_t*)communicationData + 1);
+  Serial.printf("%d, %d, %d\n", num_bytes_read, v1, v2);
+}
+</code>
+simmilar board
+{{:esp32:pasted:20210517-215550.png}}