56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
#include "ADC.h"
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#include "stm32f1xx_ll_bus.h" // Pour horloge
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const float MAX_VOLTS = 3.3;
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const float MAX_CONVERTED_VALUE = 4095.0;
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void ADC_conf(ADC_TypeDef *adc)
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{
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if (adc == ADC1) {
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LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC1);
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} else if (adc == ADC2) {
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LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_ADC2);
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}
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// Division de la frequence
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RCC->CFGR |= RCC_CFGR_ADCPRE_DIV6;
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// Fixe le nombre de conversion à 1
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adc->SQR1 &= ADC_SQR1_L;
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// Calibration
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adc->CR2 |= ADC_CR2_CAL_Msk;
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while ((adc->CR2 & ADC_CR2_CAL_Msk));
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}
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void ADC_start(ADC_TypeDef *adc)
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{
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adc->CR2 |= ADC_CR2_ADON;
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}
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uint16_t ADC_readRaw(ADC_TypeDef *adc, int channel)
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{
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// Indique la voie a convertir
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adc->SQR3 = channel;
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// Lancement de la conversion
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adc->CR2 |= ADC_CR2_ADON;
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while(!(ADC1->SR & ADC_SR_EOC)) {}
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return ADC1->DR & ADC_DR_DATA_Msk;
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}
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float ADC_convertToVolt(uint16_t value)
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{
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return ((double) value) / MAX_CONVERTED_VALUE * MAX_VOLTS;
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}
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float ADC_readVolt(ADC_TypeDef *adc, int channel)
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{
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return ADC_convertToVolt(ADC_readRaw(adc, channel));
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}
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