基于MSP430F149單片機的ADC轉(zhuǎn)換

ID:207177 · 發(fā)表于 2017-7-29 11:40

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程序功能：MCU的片內(nèi)ADC對P6.0端口，P6.1端口的電壓進行轉(zhuǎn)換
      將模擬電壓值顯示在1602液晶上。
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測試說明：調(diào)節(jié)電位器R7的旋鈕觀察液晶顯示數(shù)字變化。
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#include  <msp430x14x.h>
#include  "BoardConfig.h"
#include  "cry1602.h"

#define Num_of_Results 32
#define keyin  (P1IN&0x0f)

uchar shuzi[] = {"0123456789."};
uchar tishi[] = {"The volt is:"};

static uint results[Num_of_Results],results1[Num_of_Results]; //保存ADC轉(zhuǎn)換結(jié)果的數(shù)組                                                    // is not used for anything.
void Trans_val(uint Hex_Val);

/************************主函數(shù)****************************/
void main(void)
{
  WDTCTL = WDTPW+WDTHOLD;                //關(guān)閉看門狗
  BoardConfig(0xb8);                      //關(guān)閉數(shù)碼管、流水燈、4245
  LcdReset();                            //復(fù)位1602液晶
  DispNChar(2,0,12,tishi);                //顯示提示信息
  Disp1Char(11,1,'V');                   //顯示電壓單位
  P6DIR|=BIT3;
  P6OUT|=BIT3;//背光顯示
  P6SEL|=0X03;
  ADC12CTL0 &= ~(ENC);       //設(shè)置ENC為0，從而修改ADC12寄存器的值
  ADC12CTL0 = ADC12ON+SHT0_2+MSC;          // 打開ADC，設(shè)置采樣時間

  //ADC12MCTL0=INCH_0;
  //ADC12MCTL1=INCH_1;
while(1)
{
ADC12CTL0 &= ~(ENC);
if(keyin!=0x0f)
{
   ADC12CTL0 = ADC12ON+SHT0_2+MSC+REFON;
   ADC12CTL1 = SHP+CONSEQ_2+CSTARTADD_1;    // 使用采樣定時器
   ADC12MCTL1=INCH_1;
   ADC12IE = 0x02;                         // 使能ADC中斷
   static uint index = 0;

   results1[index++] = ADC12MEM1;             // Move results
   if(index == Num_of_Results)
   {
         uchar i;
         unsigned long sum = 0;

         index = 0;
         for(i = 0; i < Num_of_Results; i++)
         {
            sum += results1[i];
         }
         sum >>= 5;                         //除以32

         Trans_val(sum);

   }
}
else if (keyin==0x0f)
{
   ADC12CTL1 = SHP+CONSEQ_2+CSTARTADD_0;    // 使用采樣定時器
   ADC12MCTL0=INCH_0;
   ADC12IE = 0x01;                         // 使能ADC中斷
   static uint index = 0;

   results[index++] = ADC12MEM0;             // Move results
   if(index == Num_of_Results)
   {
         uchar i;
         unsigned long sum = 0;

         index = 0;
         for(i = 0; i < Num_of_Results; i++)
         {
            sum += results[i];
         }
         sum >>= 5;                         //除以32

         Trans_val(sum);

   }
}

ADC12CTL0 |= ENC;                      // 使能轉(zhuǎn)換
ADC12CTL0 |= ADC12SC;                   // 開始轉(zhuǎn)換
}
  //  _EINT();
  //  LPM0;
}

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