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audio codec example refactured

This commit is contained in:
Christoph Haberer 2017-04-27 10:21:45 +02:00
parent b9d6eb9779
commit 59a58e7522
1 changed files with 13 additions and 20 deletions
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13
STM32/libraries/BoardExamples/examples/Discovery407VG/STM32F4_Discovery_CS43L22_AudioCodecBasicTest/STM32F4_Discovery_CS43L22_AudioCodecBasicTest.ino
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@ -10,7 +10,6 @@
*/ */
// The CS43L22 is a Low Power, Stereo DAC w/Headphone & Speaker Amps // The CS43L22 is a Low Power, Stereo DAC w/Headphone & Speaker Amps
// //
// related links: // related links:
@ -39,12 +38,9 @@ void codec_writeReg(unsigned char reg, unsigned char data)
error = Wire.endTransmission(); error = Wire.endTransmission();
} }
// each register retries until success
// if communication fails the device will hang
// codec setup from // codec setup from
// https://github.com/mubase/STM32F4-Arduino-core/blob/master/cores/maple/libmaple/stm32f4codec/codec.h // https://github.com/mubase/STM32F4-Arduino-core/blob/master/cores/maple/libmaple/stm32f4codec/codec.h
// TBD: to be refactured // TBD: to be refactured
void codec_reg_setup(void) void codec_reg_setup(void)
{ {
Wire.begin(); Wire.begin();
@ -89,14 +85,12 @@ void setup()
void loop() void loop()
{ {
static uint16_t n; static uint16_t n;
I2S.write(n += 300); // produce sound: simple triangle waveform I2S.write(n += 300); // produce sound: simple triangle waveform
if ( digitalRead( USER_BTN ) ) if ( digitalRead( USER_BTN ) ) // sound on/off when button pressed
{ {
while (1) // stop sound when user button pressed while(1);
{
}
} }
} }
@ -105,4 +99,3 @@ void loop()