int main() {
int n;
short vref = *(short*)((void*)0x1FFFF7BA);
REG_L(RCC_BASE, RCC_AHBENR) |= (1 << 17); // port A clock
REG_L(RCC_BASE, RCC_AHB2ENR) |= (1 << 9); // ADC clock
REG_L(GPIOA_BASE, GPIO_MODER) |= 1;
uartEnable();
adcEnable();
REG_L(ADC_BASE, ADC_CHSELR) |= (1 << 5); // ADC from PA5
REG_L(ADC_BASE, ADC_CHSELR) |= (1 << 17); // ADC from vrefint
while(1) {
REG_L(GPIOA_BASE, GPIO_BSRR) |= (1 << 0);
sends("on\n");
adcRead(2);
sends("adc=0x");
sendHex(adc[0], 3);
n = (intDiv(3300 * (int) adc[0], adc[1]) * vref) >> 12;
sends(", V=");
sendDec(n);
sends("mv, T=");
sendDec(intDiv(((n - 2980) + 5), 10) + 25);
sends("\n");
n=250000; while(--n);
REG_L(GPIOA_BASE, GPIO_BSRR) |= (1 << 16);
sends("off\n");
n=1000000; while(--n);
}
}
inline void initA2D(void) /* Analóg-digitális átalakító inicializálása */
{
adcSetVoltageReference(ADC_VR_AVCC);
adcSetPrescaler(ADC_PRESCALER128);
adcEnable();
}
