去年使用ESP32S3+MSM261S4030H0+HT513 做了一个扬声器的项目。具体硬件设计可以在 https://oshwhub.com/arduinoai-hao-zhe/portable-speake 看到。
在使用的时候，遇到的一个问题就是MSM261S4030H0输出是32Bits(实际只有24Bits)。最近忽然想起来查了一下是否有机会按照 16Bits输出，搜索出来的资料说的是：只要设置 I2S Master按照16Bits 取即可。因为这个输出有效数据只有 24Bits，直接截断取前面的16Bit即可。
根据这个资料编写代码如下，工作正常。
#include <Arduino.h>
#include <Wire.h>
#include <driver/i2s.h>
#define I2S_PORT1 I2S_NUM_0
#define I2S_PORT2 I2S_NUM_1
#define SAMPLE_RATE 16000
#define CHANNEL_FORMAT I2S_CHANNEL_FMT_ONLY_LEFT
//#define BITS_PER_SAMPLE I2S_BITS_PER_SAMPLE_32BIT
#define BITS_PER_SAMPLE I2S_BITS_PER_SAMPLE_16BIT
#define MIC_BCK_PIN 37
#define MIC_WS_PIN 38
#define MIC_DATA_PIN 36
#define SPK_BCK_PIN 15
#define SPK_WS_PIN 6
#define SPK_DATA_PIN 7
#define SPK_MCK_PIN 16
// HT513 音量
uint16_t Volume;
#define TOLENCE 16
#define HT513_ADDR_L 0x6c
/**
@brief ht513写寄存器
@param addr 寄存器地址
@param val 要写的值
@retval None
*/
void HT513_WriteOneByte(uint8_t addr, uint8_t val)
{
Wire.beginTransmission(HT513_ADDR_L);
Wire.write(addr);
Wire.write(val);
int ack = Wire.endTransmission(true);
Serial.print("Ack ");
Serial.println(ack, HEX);
}
/**
@brief ht513读寄存器
@param addr 寄存器地址
@retval 读取到的寄存器值
*/
uint8_t HT513_ReadOneByte(uint8_t addr)
{
uint8_t temp = 0;
Wire.beginTransmission(HT513_ADDR_L);
Wire.write(addr);
Wire.endTransmission(false);
uint8_t bytesReceived = 0;
bytesReceived = Wire.requestFrom(HT513_ADDR_L, (uint8_t)1, true);
if (bytesReceived == 1) {
temp = Wire.read();
}
else {
Serial.println("Read Error ");
}
return temp;
}
void setup() {
Serial.begin(115200);
delay(2000);
i2s_config_t MIC_i2sConfig = {
.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX),
.sample_rate = SAMPLE_RATE,
.bits_per_sample = BITS_PER_SAMPLE,
.channel_format = CHANNEL_FORMAT,
.communication_format = I2S_COMM_FORMAT_I2S,
.intr_alloc_flags = 0,
.dma_buf_count = 8,
.dma_buf_len = 64,
.use_apll = false,
.tx_desc_auto_clear = false,
.fixed_mclk = 0
};
i2s_pin_config_t MIC_pinConfig = {
.bck_io_num = MIC_BCK_PIN,
.ws_io_num = MIC_WS_PIN,
.data_out_num = I2S_PIN_NO_CHANGE,
.data_in_num = MIC_DATA_PIN
};
i2s_driver_install(I2S_PORT1, &MIC_i2sConfig, 0, NULL);
i2s_set_pin(I2S_PORT1, &MIC_pinConfig);
i2s_config_t SPK_i2sConfig = {
.mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_TX),
.sample_rate = SAMPLE_RATE,
.bits_per_sample = BITS_PER_SAMPLE,
.channel_format = CHANNEL_FORMAT,
.communication_format = I2S_COMM_FORMAT_I2S,
.intr_alloc_flags = 0,
.dma_buf_count = 8,
.dma_buf_len = 64,
.use_apll = false,
.tx_desc_auto_clear = false,
.fixed_mclk = 0
};
i2s_pin_config_t SPK_pinConfig = {
.mck_io_num = SPK_MCK_PIN,
.bck_io_num = SPK_BCK_PIN,
.ws_io_num = SPK_WS_PIN,
.data_out_num = SPK_DATA_PIN,
.data_in_num = I2S_PIN_NO_CHANGE
};
i2s_driver_install(I2S_PORT2, &SPK_i2sConfig, 0, NULL);
i2s_set_pin(I2S_PORT2, &SPK_pinConfig);
analogReadResolution(9);
Wire.begin(18, 17);
// 设置 SD 为LOW
HT513_WriteOneByte(0x12, 0b11110000);
// 设置数据格式为 I2S, 16Bits
HT513_WriteOneByte(0x13, 0b00110000);
// 读取音量设置
Volume = analogRead(3);
uint8_t Vol = (Volume, 0, 511, 0x07, 0xff);
HT513_WriteOneByte(0x16, Vol);
HT513_WriteOneByte(0x15, Vol);
Serial.println(Volume, HEX);
// 调整声道
HT513_WriteOneByte(0x17, 0b10110000);
Serial.println("++++++++++++++++");
// 设置 SD 为HIGH
HT513_WriteOneByte(0x12, 0b11110100);
uint8_t Value = HT513_ReadOneByte(0x12);
Serial.println(Value, HEX);
Value = HT513_ReadOneByte(0x13);
Serial.println(Value, HEX);
Value = HT513_ReadOneByte(0x16);
Serial.println(Value, HEX);
Value = HT513_ReadOneByte(0x17);
Serial.println(Value, HEX);
Serial.print(" starting");
// dsp.beginAEC(256, 1024, 16000); // Initialize AEC with frame size, filter length, and sample rate
// dsp.enableAEC(true); // Enable AEC
}
int8_t mic[512], speaker[521], out[512];
void loop() {
size_t bytesRead = 0;
i2s_read(I2S_PORT1, &mic, sizeof(mic), &bytesRead, portMAX_DELAY);
i2s_write(I2S_PORT2, &mic, sizeof(mic), &bytesRead, portMAX_DELAY);
if (abs(analogRead(3) - Volume) > TOLENCE) {
// 读取音量设置
Volume = analogRead(3);
// 设置 SD 为LOW
HT513_WriteOneByte(0x12, 0b11110000);
uint8_t Vol = map(Volume, 0, 511, 0x07, 0xff);
HT513_WriteOneByte(0x16, Vol);
// 设置 SD 为HIGH
HT513_WriteOneByte(0x12, 0b11110100);
Serial.print(analogRead(3), HEX);
Serial.print(" ");
Serial.print(Volume, HEX);
Serial.print(" ");
Serial.println(Vol, HEX);
}
}