I2S error with M5Core2 V0.1.5 but not with V0.1.3

[NDC-SC]

Describe the bug

With M5Core2 V0.1.5 library, accessing I2S produces the error messages:

E (1208) I2S: i2s_driver_uninstall(2048): I2S port 0 has not installed E (1245) I2S: register I2S object to platform failed E (1245) I2S: i2s_read(2265): RX mode is not enabled

but no error with M5Core2 V0.1.3 library and the sketch runs properly

To reproduce

// sketch provided below

#include <M5Core2.h> // include M5Core2 and #include <driver/i2s.h> // ESP32 I2S libraries const int bufferLen = 1024; // DMA buffer size (samples) int N = 1, yData[320], yBase = 120; int minY = 0, maxY = 2000; // min and max values M5GO //int minY = -600, maxY = 600; // min and max values M5Stack

void setup() { M5.begin(); M5.Lcd.fillScreen(BLACK); // initialise display M5.Lcd.setTextSize(1); M5.Lcd.setTextColor(WHITE, BLACK); M5.Lcd.drawString("PDM mic", 50, 0, 4); for (int i=0; i<320; i++) yData[i] = yBase; I2Sconfig(); // configure I2S pinConfig(); // and GPIO pins }

void I2Sconfig() // function to configure I2S { i2s_config_t i2s_config = { // receive and PDM modes .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_PDM), .sample_rate = 44100, // sample frequency .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT, // 16-bit sampling .channel_format = I2S_CHANNEL_FMT_ONLY_RIGHT, // mono channel sampling .communication_format = I2S_COMM_FORMAT_STAND_I2S, .intr_alloc_flags = ESP_INTR_FLAG_LEVEL1, .dma_buf_count = 2, // DMA buffers .dma_buf_len = bufferLen // DMA buffer length }; i2s_driver_install(I2S_NUM_0, &i2s_config, 0, NULL); }

void pinConfig() // function to configure I2S pins { i2s_pin_config_t pin_config = { .bck_io_num = I2S_PIN_NO_CHANGE, // bit clock frequency .ws_io_num = 0, // word select (left /right) clock .data_out_num = I2S_PIN_NO_CHANGE, // data output .data_in_num = 34 // data input }; i2s_set_pin(I2S_NUM_0, &pin_config); }

void loop() { wave(); // call wave function }

void wave() // function to read DMA buffer and display waveform { size_t bits = 0; int16_t buffer[bufferLen] = {0}; // define and read I2S data buffer i2s_read(I2S_NUM_0, &buffer, sizeof(buffer), &bits, portMAX_DELAY); int bytes = bits / 8; // convert bits to bytes if(bytes > 0) { for (int i=0; i<bytes; i=i+N) { M5.Lcd.drawLine(0, yData[0], 1, yData[1], BLACK); // overwrite value for (int j=1; j<320; j++) yData[j-1] = yData[j]; // shift one position int temp = constrain(buffer[i], minY, maxY); // constrain buffer values yData[319] = map(temp, minY, maxY, 30, 240); // map to LCD height for (int j=1; j<319; j++) { M5.Lcd.drawLine(j, yData[j-1], j+1, yData[j], BLACK); // overwrite and M5.Lcd.drawLine(j, yData[j], j+1, yData[j+1], RED); // draw new line } } } M5.update(); }

Expected behavior

M5Core2 screen displays waveform of sound received by built-in microphone

Screenshots

Environment

• OS: Windows 10
• IDE &IDE Version: Arduino 1.8.19
• Repository Version:

Additional context

No response

Issue checklist

• [X] I searched for previous reports in the issue tracker
• [X] My report contains all necessary details