Posted on October 26, 2010 at 13:07hi.
i cant understand why EOC wont go up to ''1'' after conversion. i can see the result in ADC->DR but the flag wont go up.
why?
thanks.
#include ''stm32F10x.h''
#define CCR_ENABLE_Set ((uint32_t)0x00000001)
void setsystemclock(void);
__IO uint16_t ADCConvertedValue;
int temp=0;
int main(void)
{
setsystemclock(); //set system clock to 24Mhz3
//rcc CONFIGURATION
RCC->AHBENR=RCC_AHBENR_DMA1EN; //dma clock enable
RCC->APB2ENR=RCC_APB2ENR_IOPCEN | RCC_APB2ENR_ADC1EN; //portc and ADC clock enable.
//GPIO CONFIGURATION
GPIOC->CRL=0x0;// ADC1_IN14
//ADC configuration
ADC1->CR1=ADC_CR1_SCAN;
ADC1->CR2=ADC_CR2_ALIGN | ADC_CR2_EXTSEL;// |ADC_CR2_DMA ; //data align right , software start
ADC1->SMPR1=0;// 1.5 cycles conversion time
ADC1->SQR3=0xe;//channel number 14 PC4 first conversion
//ADC1->CR2 |=ADC_CR1_SCAN ; /* Enable ADC1 DMA */
ADC1->CR2 |=ADC_CR2_ADON; /* Enable ADC1 */
ADC1->CR2 |=ADC_CR2_RSTCAL ;//reset calibration
while ((ADC1->CR2 & ADC_CR2_RSTCAL) != 0x00); //wait for end of ADC1 reset calibration register
ADC1->CR2 |=ADC_CR2_CAL;/* Start ADC1 calibaration */
while((ADC1->CR2 & ADC_CR2_CAL) != 0x00);/* Check the end of ADC1 calibration */
ADC1->CR2 |=ADC_CR2_SWSTART |ADC_CR2_EXTTRIG; /* Start ADC1 Software Conversion */
while(1)
{
temp=ADC1->SR+1;
if((temp&ADC_SR_EOC)>0)
{
temp=ADC1->DR;
ADC1->CR2 |=ADC_CR2_SWSTART |ADC_CR2_EXTTRIG;
temp=temp+1;
}
}
}
void setsystemclock(void)
{
RCC->CR |= RCC_CR_HSEON;
// Wait until it's ready
while ((RCC->CR & RCC_CR_HSERDY) == 0)
;
// Select PREDIV1 as PLL source and sett PLL mul to 3 (set bit 0)
// for 8*3 = 24 MHz
RCC->CFGR |= RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL_0;
// Start PLL
RCC->CR |= RCC_CR_PLLON;
// Wait until it's ready
while ((RCC->CR & RCC_CR_PLLRDY) == 0)
;
// Select PLL as system clock
RCC->CFGR |= RCC_CFGR_SW_PLL;
// Here we can check if PLL is used, and maybe disable HSI
// Disable HSI
RCC->CR &= ~RCC_CR_HSION;
RCC->CFGR|=RCC_CFGR_MCO_2; //sys clock output
}
