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This commit is contained in:
Kai Lauterbach 2024-02-09 21:31:21 +01:00
parent c099bb3a53
commit 7633963ea7
1 changed files with 4 additions and 2 deletions
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6
ESP32_Oscilloscope/i2s.ino
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@ -32,9 +32,11 @@ void ADC_Sampling(uint16_t *i2s_buff){
} }
*/ */
void ADC_Sampling(uint16_t *i2s_buff){ void ADC_Sampling(uint16_t *i2s_buff){
size_t bytes_read; for (int i = 0; i < B_MULT; i++) { size_t bytes_read;
for (int i = 0; i < B_MULT; i++) {
i2s_read(I2S_NUM_0, (void*)&i2s_buff[i * NUM_SAMPLES], NUM_SAMPLES * sizeof(uint16_t), &bytes_read, portMAX_DELAY); i2s_read(I2S_NUM_0, (void*)&i2s_buff[i * NUM_SAMPLES], NUM_SAMPLES * sizeof(uint16_t), &bytes_read, portMAX_DELAY);
for(size_t ix = 0; ix < bytes_read/2; ix++) i2s_buff[(i * NUM_SAMPLES) + ix] &= 0x0FFF; // 16bit to 12bit conversion  for(size_t ix = 0; ix < bytes_read/2; ix++)
i2s_buff[(i * NUM_SAMPLES) + ix] &= 0x0FFF; // 16bit to 12bit conversion 
} }
} }