Steins7
f9113fc410
* improved Makefile * fixed openocd script - removed uneeded file * minor cosmetic tweaks
42 lines
889 B
C
42 lines
889 B
C
#include "adc.h"
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extern Clock_t sysclks;
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int adc_init(ADC_TypeDef* adc) {
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// enable adc clock
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if(adc == ADC1) RCC->APB2ENR |= 0x1 << 9;
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else if(adc == ADC2) RCC->APB2ENR |= 0x1 << 10;
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else return -1; //no such adc
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// enable adc
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adc->CR2 |= 0x1;
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// configure regular channels
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adc->CR1 = 0; //reset value
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adc->CR1 |= 0x1 << 23; //enable analog watchdog
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adc->CR1 |= 0x1 << 11; //discontinuous mode
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// set trigger to manual
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adc->CR1 |= 0x7 << 3;
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adc->SMPR2 |= 0x3FFFFFFF;
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// calibrate
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adc->CR2 |= 0x1 << 2;
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while((adc->CR2 >> 2) & 0x1);
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return 0;
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}
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uint16_t adc_read(ADC_TypeDef* adc, uint8_t channel) {
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adc->SQR1 &= ~(0xF << 20); //one conversion only
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adc->SQR3 = (adc->SQR3 & ~(0x1F)) | channel; //set channel
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//adc->CR2 |= 0x1 << 22; //start convertion
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adc->CR2 |= 0x1;
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while(!((adc->SR >> 1) & 0x1)); //waiting for convertion
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return adc->DR & 0xFFF;
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}
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