Posted on May 17, 2011 at 14:05i configured ADC1 in independent mode, it is working fine. I want to configure in dual mode ADC1 with channel0 and ADC2 with channel1 and after conversion transmitting the counts through USART to Hyperterminal, i able read the ADC1 channel0 counts but ADC2 channel1 counts, i have written my code as below, please tell me what is the fault in the code...
#include<stm32f10x_lib.h>
#include<math.h>
#define CFGR_REG_VAL 0x001D8402; //value to be written into RCC CFGR register
#define PSC_VALUE 0x0000 //value to be written into Prescalar register of Timer3
#define ARR_VALUE 0x1C20 //0x2D0//10us //value to be written into autoreload register
void RCC_Configuration(void);
void GPIOA_Config(void);
void USART_Configuration(void);
void ADC_DualMode_Config(void);
unsigned int i_ADC_val,ADC_val[2048]={0},temp_count=0,Y=0;
unsigned int x,i,temp1,temp2;
unsigned char temp[9]={0};
float RMS_val=0.0,DC_val=0.0;
main()
{
RCC_Configuration();
GPIOA_Config();
USART_Configuration();
ADC_DualMode_Config();
/*ADC enable*/
ADC1->CR2|=0x00500000;//0x00001;
//ADC2->CR2|=0x00500000;//0x00001;
while(1)
{
if((ADC1->SR & 0x2))
{
temp1=(ADC1->DR & 0X00000FFF);
temp2=((ADC1->DR & 0X0FFF0000)>>16);
temp[0] =(temp1/1000)+0X30;//(temp1 & 0x000000F)+0x30;
temp1=temp1%1000;
temp[1]=(temp1/100)+0X30;//((temp1 & 0x00000F0)>>4)+0x30;
temp1=temp1%100;
temp[2]=(temp1/10)+0X30;
temp1=temp1%10;
temp[3]=temp1+0X30;
temp[4]=' ';
temp[5] =(temp2/1000)+0X30;//(temp2 & 0x000000F)+0x30;
temp2=temp2%1000;
temp[6]=(temp2/100)+0X30;//((temp2 & 0x00000F0)>>4)+0x30;
temp2=temp2%100;
temp[7]=(temp2/10)+0X30;
temp2=temp2%10;
temp[8]=temp2+0X30;
USART1->CR1|=0x00002000; //USART ENABLE
for(i=0;i<9;i++)
{
while((USART1->SR & 0x40)==0);
x= USART1->SR;
USART1->DR=temp[i];
}
while((USART1->SR & 0x40)==0);
x= USART1->SR;
USART1->DR=0X0A;
while((USART1->SR & 0x40)==0);
x= USART1->SR;
USART1->DR=0X0D;
USART1->CR1&=0xFFFFDFFF;
}
}
}
/*RCC Configuration*/
void RCC_Configuration(void)
{
RCC->CSR|=0x01000000;
RCC->CR=0x00010080; //external highe speed clock enabled
if ((RCC->CR & RCC_HSE_ON))
{ // if HSE enabled
while ((RCC->CR & RCC_FLAG_HSERDY)==0 ); // Wait for HSERDY = 1 (HSE is ready)
//Flash access control reg
FLASH->ACR=0X12; //prefetch buffer enabled and flash latacy(2 wait state)
RCC->CFGR= CFGR_REG_VAL
RCC->CR|=0x01000000; //PLL enable
if (RCC->CR & RCC_PLL_ON)
{ // if PLL enabled
while ((RCC->CR & RCC_FLAG_PLLRDY) == 0); // Wait for PLLRDY = 1 (PLL is ready)
}
while ((RCC->CFGR & 0x0000008) ==0);
}
}
/*End of RCC Configuration*/
/*GPIO Configuration Function*/
void GPIOA_Config(void)
{
RCC->APB2ENR|=0x00000004; //GPIOA clock enable
AFIO->MAPR=0x00000000;
GPIOA->CRH = (GPIOA->CRH & 0xFFFFF00F)|0x4B0;
//GPIOA->CRL &= 0xFF00; //PA0 and PA1 configured as Analog inputs
}
/*End of GPIO Configuration Function*/
/*USART Configuration Function*/
void USART_Configuration(void)
{
RCC->APB2ENR|=0x00004000; //USART1 clock enable
USART1->BRR=0x271; //0x271-115200 //0x1D4C;9600 baud rate
USART1->CR1=0x0000004D; //TCIE(transmit complete interrupt enable)
USART1->CR2=0x000; //eable clock
}
/*End of USART Configuration Function*/
/*ADC Configuration Function*/
void ADC_DualMode_Config(void)
{
/*ADC1 Configuration*/
RCC->APB2ENR|=0x601; //Enable ADC1, ADC2 and AFIO peripheral clock
ADC1->CR1=0x60100;
ADC1->CR2=0x000E0003;
ADC1->SQR3=0x0;
/*end of ADC1 Configuration*/
/*ADC2 Configuration*/
ADC2->CR1=0x60100;
ADC2->CR2=0x000E0003;
ADC2->SQR3=0x1;
/*end of ADC2 Configuration*/
}
/*End of ADC Configuration Function*/
