diff options
| -rw-r--r-- | examples/device/audio_4_channel_mic/src/main.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/examples/device/audio_4_channel_mic/src/main.c b/examples/device/audio_4_channel_mic/src/main.c index 1de4f9dac..10e6fe88a 100644 --- a/examples/device/audio_4_channel_mic/src/main.c +++ b/examples/device/audio_4_channel_mic/src/main.c @@ -104,39 +104,39 @@ int main(void) // Generate dummy data #if CFG_TUD_AUDIO_ENABLE_ENCODING uint16_t * p_buff = i2s_dummy_buffer[0]; - uint16_t dataVal = 1; + uint16_t dataVal = 0; for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++) { // CH0 saw wave *p_buff++ = dataVal; // CH1 inverted saw wave - *p_buff++ = 60 + AUDIO_SAMPLE_RATE/1000 - dataVal; - dataVal++; + *p_buff++ = 3200 + AUDIO_SAMPLE_RATE/1000 - dataVal; + dataVal+= 32; } p_buff = i2s_dummy_buffer[1]; for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++) { // CH3 square wave - *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 120:170; + *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 3400:5000; // CH4 sinus wave float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000); - *p_buff++ = (uint16_t)(sinf(t) * 25) + 200; + *p_buff++ = (uint16_t)((int16_t)(sinf(t) * 750) + 6000); } #else uint16_t * p_buff = i2s_dummy_buffer; - uint16_t dataVal = 1; + uint16_t dataVal = 0; for (uint16_t cnt = 0; cnt < AUDIO_SAMPLE_RATE/1000; cnt++) { // CH0 saw wave *p_buff++ = dataVal; // CH1 inverted saw wave - *p_buff++ = 60 + AUDIO_SAMPLE_RATE/1000 - dataVal; - dataVal++; + *p_buff++ = 3200 + AUDIO_SAMPLE_RATE/1000 - dataVal; + dataVal+= 32; // CH3 square wave - *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 120:170; + *p_buff++ = cnt < (AUDIO_SAMPLE_RATE/1000/2) ? 3400:5000; // CH4 sinus wave float t = 2*3.1415f * cnt / (AUDIO_SAMPLE_RATE/1000); - *p_buff++ = (uint16_t)(sinf(t) * 25) + 200; + *p_buff++ = (uint16_t)((int16_t)(sinf(t) * 750) + 6000); } #endif |