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audio codec example corrected

This commit is contained in:
Christoph Haberer 2017-04-27 09:50:38 +02:00
parent 22ed7e5245
commit b9d6eb9779
1 changed files with 18 additions and 54 deletions
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72
STM32/libraries/BoardExamples/examples/Discovery407VG/STM32F4_Discovery_CS43L22_AudioCodecBasicTest/STM32F4_Discovery_CS43L22_AudioCodecBasicTest.ino
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@ -26,69 +26,33 @@ I2SClass I2S(SPI3, PC12 /*sd*/ , PA4 /*ws*/, PC10 /*ck*/, PC7/* MCK*/); // setup
#define SERIALINTERFACE SerialUSB
#define AUDIOCODEC_CHIP_SELECT PD4
#define AUDIOCODEC_CS PD4
#define CODEC_I2C_ADDR 0x4A // i2c address ( 2*0x4A = 0x94 )
#define CODEC_ADDR 0x4A // i2c address ( 2*0x4A=0x94)
void codec_writeReg(unsigned char reg, unsigned char data)
{
Wire.beginTransmission(CODEC_I2C_ADDR);
uint8_t error;
Wire.beginTransmission(CODEC_ADDR);
Wire.write(reg);
Wire.write(data);
error = Wire.endTransmission();
}
enum CodecRegister {
ID = 1,
POWER_CTL1 = 2,
POWER_CTL2 = 4,
CLOCKING_CTL = 5,
INTERFACE_CTL1 = 6,
INTERFACE_CTL2 = 7,
PASSTHROUGH_A = 8,
PASSTHROUGH_B = 9,
ANALOG_ZC_SR = 0xa,
PASSTHROUGH_GANG_CTL = 0xc,
PLAYBACK_CTL1 = 0xd,
MISC_CTL = 0xe,
PLAYBACK_CTL2 = 0xf,
PASSTHROUGH_A_VOL = 0x14,
PASSTHROUGH_B_VOL = 0x15,
PCMA_VOL = 0x1a,
PCMB_VOL = 0x1b,
BEEP_FREQ_ON_TIME = 0x1c,
BEEP_VOL_OFF_TIME = 0x1d,
BEEP_TONE_CFG = 0x1e,
TONE_CTL = 0x1f,
MASTER_A_VOL = 0x20,
MASTER_B_VOL = 0x21,
HEADPHONE_A_VOL = 0x22,
HEADPHONE_B_VOL = 0x23,
SPEAKER_A_VOL = 0x24,
SPEAKER_B_VOL = 0x25,
CHANNEL_MIXER_AND_SWAP = 0x26,
LIMIT_CTL1_THRESHOLDS = 0x27,
LIMIT_CTL2_RELEASE_RATE = 0x28,
LIMITER_ATTACK_RATE = 0x29,
OVERFLOW_AND_CLOCK_STATUS = 0x2e,
BATTERY_COMPENSATION = 0x2f,
VP_BATTERY_LEVEL = 0x30,
SPEAKER_STATUS = 0x31,
CHARGE_PUMP_FREQUENCY = 0x34
};
// each register retries until success
// if communication fails the device will hang
// codec setup from
// https://github.com/mubase/STM32F4-Arduino-core/blob/master/cores/maple/libmaple/stm32f4codec/codec.h
// TBD: to be simplified and reworked
// TBD: to be refactured
void codec_reg_setup(void)
{
Wire.begin();
codec_writeReg(0x02, 0x01); // power save registers -> all on
codec_writeReg(0x00, 0x99);
codec_writeReg(0x47, 0x80); //inits
codec_writeReg(0x0d, 0x03); // playback ctrl
codec_writeReg(0xd, 0x3); // playback ctrl
codec_writeReg(0x32, (1 << 7)); // vol
codec_writeReg(0x32, (0 << 7)); // vol
codec_writeReg(0x00, 0x00); // inits
@ -101,24 +65,23 @@ void codec_reg_setup(void)
codec_writeReg(0x80, 0x0a); // both channels on
codec_writeReg(0x1f, 0x0f);
codec_writeReg(0x02, 0x9e);
}
void setup()
{
pinMode(USER_BTN, INPUT); //user button for sound stop, mandatory for STM MCUs if you want to use the button
pinMode(AUDIOCODEC_CHIP_SELECT, OUTPUT); // the chip select pin of the codec needs to be enabled
pinMode(AUDIOCODEC_CS, OUTPUT); // the chip select pin of the codec needs to be enabled
//digitalWrite(AUDIOCODEC_CHIP_SELECT, HIGH);
//digitalWrite(AUDIOCODEC_CS, HIGH);
// start I2S
// I2S will also produce MCK for the codec of aroung 12Mhz
// without MCK the CS43L22 is not working
I2S.begin(I2S_PHILIPS_MODE, 44000, 16);
// MCK is running, enable codec
digitalWrite(AUDIOCODEC_CHIP_SELECT, HIGH);
// start the I2C driver for codec register setup
Wire.begin();
digitalWrite(AUDIOCODEC_CS, HIGH); // enable codec
Wire.begin(); // start the I2C driver for codec register setup
codec_reg_setup();
}
@ -128,9 +91,9 @@ void loop()
static uint16_t n;
I2S.write(n += 300); // produce sound: simple triangle waveform
if ( digitalRead( USER_BTN ) ) // stop sound when user button pressed
if ( digitalRead( USER_BTN ) )
{
while (1)
while (1) // stop sound when user button pressed
{
}
@ -142,3 +105,4 @@ void loop()