新手上路：M052的ADC采集问题

只看该作者 · 2015-4-13 16:35

自己修改的新唐例子程序，但发现无法采集，程序如下，求大神解答
#include <stdio.h>
#include "M051Series.h"
#include "lcd_driver.h"

void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock                                                                                     */
/*---------------------------------------------------------------------------------------------------------*/

/* Unlock protected registers */
   SYS_UnlockReg();

/* Enable ADC and PWM23 clock */
CLK->APBCLK = CLK_APBCLK_PWM23_EN_Msk | CLK_APBCLK_ADC_EN_Msk;

/* ADC clock source is 22.1184MHz, set divider to (3 + 1), ADC clock is 22.1184/4 MHz */
CLK->CLKDIV |= (3 << CLK_CLKDIV_ADC_N_Pos);

/* Update System Core Clock */
/* User can use SystemCoreClockUpdate() to calculate SystemCoreClock and CycylesPerUs automatically. */
SystemCoreClockUpdate();

/*---------------------------------------------------------------------------------------------------------*/

/* Set P1.0 to AIN0 function */
SYS->P1_MFP = SYS_MFP_P10_AIN0;

/* Disable digital input path of analog pin AIN0 to prevent leakage */
P1->OFFD |= 1 << GPIO_OFFD_OFFD_Pos;

/* Lock protected registers */
   SYS_LockReg();
}

void ADC_Init(void)
{
/* Set to convert ADC channel 0 */
ADC->ADCHER = 0x1;
/* Enable the ADC converter */
ADC->ADCR = ADC_ADCR_ADEN_Msk;
}

/* Main function  */
int main(void)
{
uint32_t u32Data, u32Sum, u32Count;
//    char adc_value[20];

/* Init System, IP clock and multi-function I/O
   In the end of SYS_Init() will issue SYS_LockReg()
   to lock protected register. If user want to write
   protected register, please issue SYS_UnlockReg()
   to unlock protected register if necessary */
SYS_Init();

/* Init ADC to get the value of variable resistor */
ADC_Init();
u32Data = 0 ;
u32Count = 0;
u32Sum = 0;

while(1)
{
      /* Start convert */
      ADC_START_CONV(ADC);

      /* Waiting for convert complete */
      while(ADC_IS_BUSY(ADC));

      /* Read the result from ADC */
      u32Data = ADC->ADDR[0] & ADC_ADDR_RSLT_Msk;

      /* Determine the sum */
      u32Sum += u32Data;
      u32Count++;
      if(u32Count == 128)
      {
         /* Determine the average */
         u32Data = u32Sum / 128;

         /* Reset count and sum */
         u32Count = 0;
         u32Sum = 0;
      }
}
}