comparison: blackbox/driver/adc.c
blackbox/driver/adc.c
- changeset 7
- f4e250d5402b
- parent 0
- 9b7de464f0ea
equal
deleted
inserted
replaced
| 6:2405aff29a51 | 7:f4e250d5402b |
|---|---|
| 10 static uint8_t adcReference=(1<<REFS0); // = VCC 5V | 10 static uint8_t adcReference=(1<<REFS0); // = VCC 5V |
| 11 | 11 |
| 12 // get a sample from ADC chip. | 12 // get a sample from ADC chip. |
| 13 // chanell must be in range 0-7. | 13 // chanell must be in range 0-7. |
| 14 uint16_t getADC(int channel) { | 14 uint16_t getADC(int channel) { |
| 15 if (channel == 0) | 15 // if (channel == 0) |
| 16 adcReference = ((1<<REFS1) | (1<<REFS0)); // switch to 2.56V (~2x | 16 adcReference = ((1<<REFS1) | (1<<REFS0)); // switch to 2.56V (~2x |
| 17 //adcReference = (1<<REFS1); // switch to 1.1v (~4.5x) - not on ATMEGA16 | 17 //adcReference = (1<<REFS1); // switch to 1.1v (~4.5x) - not on ATMEGA16 |
| 18 else | 18 // else |
| 19 adcReference = (1<<REFS0); // switch to 5v (1x) | 19 // adcReference = (1<<REFS0); // switch to 5v (1x) |
| 20 ADMUX = adcReference + channel; | 20 ADMUX = adcReference + channel; |
| 21 // start one sample | 21 // start one sample |
| 22 ADCSRA |= (1<<ADSC); | 22 ADCSRA |= (1<<ADSC); |
| 23 // wait for the result | 23 // wait for the result |
| 24 loop_until_bit_is_clear(ADCSRA, ADSC); | 24 loop_until_bit_is_clear(ADCSRA, ADSC); |
