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WM8978 support for PicoDSP, etc.

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This commit is contained in:
TroyHacks
2023-10-20 01:23:10 -04:00
parent b2344ad219
commit 3ba2fe4ee0
3 changed files with 114 additions and 2 deletions
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91
usermods/audioreactive/audio_source.h
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@@ -615,6 +615,97 @@ class ES8388Source : public I2SSource {
};
class WM8978Source : public I2SSource {
private:
// I2C initialization functions for WM8978
void _wm8978I2cBegin() {
Wire.setClock(400000);
}
void _wm8978I2cWrite(uint8_t reg, uint16_t val) {
#ifndef WM8978_ADDR
#define WM8978_ADDR 0x1A
#endif
char buf[2];
buf[0] = (reg << 1) | ((val >> 8) & 0X01);
buf[1] = val & 0XFF;
Wire.beginTransmission(WM8978_ADDR);
Wire.write((const uint8_t*)buf, 2);
uint8_t i2cErr = Wire.endTransmission(); // i2cErr == 0 means OK
if (i2cErr != 0) {
DEBUGSR_PRINTF("AR: WM8978 I2C write failed with error=%d (addr=0x%X, reg 0x%X, val 0x%X).\n", i2cErr, WM8978_ADDR, reg, val);
}
}
void _wm8978InitAdc() {
// https://www.mouser.com/datasheet/2/76/WM8978_v4.5-1141768.pdf
// Sets ADC to around what AudioReactive expects, and loops line-in to line-out/headphone for monitoring.
// Registries are decimal, settings are 9-bit binary as that's how everything is listed in the docs
// ...which makes it easier to reference the docs.
//
_wm8978I2cBegin();
_wm8978I2cWrite( 0,0b000000000); // Reset all settings
_wm8978I2cWrite( 1,0b000001011); // Power Management 1 - power off most things
_wm8978I2cWrite( 2,0b110110011); // Power Management 2 - enable output and amp stages (amps may lift signal but it works better on the ADCs)
_wm8978I2cWrite( 3,0b000001100); // Power Management 3 - enable L&R output mixers
_wm8978I2cWrite( 4,0b001010000); // Audio Interface - standard I2S, 24-bit
_wm8978I2cWrite( 5,0b000000001); // Loopback Enable
_wm8978I2cWrite( 6,0b000000000); // Clock generation control - use external mclk
_wm8978I2cWrite( 7,0b000000100); // Sets sample rate to ~24kHz (only used for internal calculations, not I2S)
_wm8978I2cWrite(14,0b010001000); // 128x ADC oversampling - high pass filter disabled as it kills the bass response
_wm8978I2cWrite(43,0b000110000); // Mute signal paths we don't use
_wm8978I2cWrite(44,0b000000000); // Disconnect microphones
_wm8978I2cWrite(45,0b111000000); // Mute signal paths we don't use
_wm8978I2cWrite(46,0b111000000); // Mute signal paths we don't use
_wm8978I2cWrite(47,0b001000000); // 0dB gain on left line-in
_wm8978I2cWrite(48,0b001000000); // 0dB gain on right line-in
_wm8978I2cWrite(49,0b000000010); // Mixer thermal shutdown enable
_wm8978I2cWrite(50,0b000010110); // Output mixer enable only left bypass at 0dB gain
_wm8978I2cWrite(51,0b000010110); // Output mixer enable only right bypass at 0dB gain
_wm8978I2cWrite(52,0b110111001); // Left line-out enabled at 0dB gain
_wm8978I2cWrite(53,0b110111001); // Right line-out enabled at 0db gain
_wm8978I2cWrite(54,0b001000000); // Mute left speaker output
_wm8978I2cWrite(55,0b101000000); // Mute right speaker output
}
public:
WM8978Source(SRate_t sampleRate, int blockSize, float sampleScale = 1.0f, bool i2sMaster=true) :
I2SSource(sampleRate, blockSize, sampleScale, i2sMaster) {
_config.channel_format = I2S_CHANNEL_FMT_ONLY_LEFT;
};
void initialize(int8_t i2swsPin, int8_t i2ssdPin, int8_t i2sckPin, int8_t mclkPin) {
DEBUGSR_PRINTLN("WM8978Source:: initialize();");
// if ((i2sckPin < 0) || (mclkPin < 0)) { // WLEDMM not sure if this check is needed here, too
// ERRORSR_PRINTF("\nAR: invalid I2S WM8978 pin: SCK=%d, MCLK=%d\n", i2sckPin, mclkPin);
// return;
// }
// BUG: "use global I2C pins" are valid as -1, and -1 is seen as invalid here.
// Workaround: Set I2C pins here, which will also set them globally.
// Bug also exists in ES7243.
if ((i2c_sda < 0) || (i2c_scl < 0)) { // check that global I2C pins are not "undefined"
ERRORSR_PRINTF("\nAR: invalid WM8978 global I2C pins: SDA=%d, SCL=%d\n", i2c_sda, i2c_scl);
return;
}
if (!pinManager.joinWire(i2c_sda, i2c_scl)) { // WLEDMM specific: start I2C with globally defined pins
ERRORSR_PRINTF("\nAR: failed to join I2C bus with SDA=%d, SCL=%d\n", i2c_sda, i2c_scl);
return;
}
// First route mclk, then configure ADC over I2C, then configure I2S
_wm8978InitAdc();
I2SSource::initialize(i2swsPin, i2ssdPin, i2sckPin, mclkPin);
}
void deinitialize() {
I2SSource::deinitialize();
}
};
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 2, 0)
#if !defined(SOC_I2S_SUPPORTS_ADC) && !defined(SOC_I2S_SUPPORTS_ADC_DAC)
#warning this MCU does not support analog sound input