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m05e00 values ok prescaler and 8bits

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hugo LAMY
2025-03-14 14:15:49 +01:00
parent 847f969a53
commit 6ef217c05e
3 changed files with 19 additions and 9 deletions
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module05/ex00/adc.c
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@@ -19,9 +19,8 @@ void adc_init(uint8_t prescaler_value) {
uint16_t adc_read(uint8_t channel) {
CLEAR(PRR, PRADC); // 24.3 : ensure power reduction is disabled for ADC, (10.11.3 : PRR – Power Reduction Register)
ADMUX = (ADMUX & 0b11110000) | (channel & 0b1111); // Table 24-4 : Select ADC channel, (Table 14-6 : alternate function for RV1 on PC0 -> ADC0)
// ADMUX |= (1 << ADLAR); // 24.9.3 : enable left adjust result
ADMUX |= (1 << ADLAR); // 24.9.1 : enable left adjust result
ADCSRA |= (1 << ADSC); // 24.9.2 : Start conversion, ADSC: ADC Start Conversion
while (ADCSRA & (1 << ADSC)); // Wait for completion
// return ADCH; // 24.9.3 : ADC updated only when ADCH is read, not ADCL, so for 8 bits precision uses left adjust result to only read ADCH
return ADC;
return ADCH; // 24.9.3 : ADC updated only when ADCH is read, not ADCL, so for 8 bits precision uses left adjust result to only read ADCH
}