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標題: 請教一下單片機代碼讀取P1.0 P1.1adc為啥讀取不到數值 [打印本頁]

作者: 宏達工控 時間: 2025-7-26 12:41
標題: 請教一下單片機代碼讀取P1.0 P1.1adc為啥讀取不到數值
#include <STC15F2K60S2.H>
void InitADC(void)
{
P1ASF = 0x03;
ADC_RES = 0;
ADC_CONTR = 0x80;
_nop_();          // 等待ADC穩定
_nop_();
_nop_();
_nop_();

}
unsigned int GetADCResult(unsigned char ch)
unsigned int result;
ADC_CONTR = (ADC_CONTR & 0xF8) | (ch & 0x07);
ADC_CONTR |= 0x08;
_nop_();
_nop_();
while (!(ADC_CONTR & 0x10));
ADC_CONTR &= ~0x10;
result = (ADC_RES << 2) | (ADC_RESL & 0x03);

return result;
}
void main(void)
{
unsigned int voltage = 0;  //
unsigned int current = 0;  //
while(1)
{
                     // 采集電壓值(通道0:P1.0)
      voltage = GetADCResult(0);
      // 電壓轉換.最大數3000
   voltage = (voltage * 3000) / 1023; //3000

                     //voltage = 2999;
                     // 采集電流值(通道1:P1.1)
   current = GetADCResult(1);
current = (current * 1000) / 1023;
}

作者: WL0123 時間: 2025-7-26 16:37
P1M0 = 0x00; P1M1 = 0x03; 設置P1.0、P1.1為高祖模式

#include <STC15F2K60S2.H>
#include <intrins.h>
void InitADC(void)
{
P1ASF = 0x03;
ADC_RES = 0;
ADC_RESL = 0;
ADC_CONTR = 0x80;
_nop_(); // 等待ADC穩定
_nop_();
_nop_();
_nop_();
}
unsigned int GetADCResult(unsigned char ch)
{
unsigned int result;
ADC_CONTR = (ADC_CONTR & 0xF8) | (ch & 0x07);
ADC_CONTR |= 0x08;
_nop_();
_nop_();
_nop_();
_nop_();
while (!(ADC_CONTR & 0x10));
ADC_CONTR &= ~0x10;
result = (ADC_RES << 2) | (ADC_RESL & 0x03);
return result;
}
void main(void)
{
unsigned int voltage = 0; //
unsigned int current = 0; //
P1M0 = 0x00; P1M1 = 0x03;
InitADC();
while(1)
{
// 采集電壓值(通道0:P1.0)
voltage = GetADCResult(0);
// 電壓轉換.最大數3000
voltage = ((long)voltage * 3000) / 1024; //3000
//voltage = 2999;
// 采集電流值(通道1:P1.1)
current = GetADCResult(1);
current = ((long)current * 1000) / 1024;
}
}

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