p270_s1.c

来自「msp430开发版程序」· C语言 代码 · 共 31 行

//单通道多次转换举例 P270
//#include  "msp430x44x.h"

/*
将8路精密可调电阻电路板接到P6口，然后运行仿真，查看结果
*/

#include  "msp430x14x.h"
#define Num_of_Results  8
static unsigned int results[Num_of_Results];
void main(void)
{
	WDTCTL = WDTPW + WDTHOLD;
	P6SEL |= 0x01;  //使能A/D通道A0
	ADC12CTL0 = ADC12ON + SHT0_8 + MSC;
	ADC12CTL1 = SHP + CONSEQ_2;  //单通道多次转换
	ADC12IE = 0x01;  //使能中断ADC12IFG.0
	ADC12CTL0 |= ENC;  //使能转换
	_EINT();
	ADC12CTL0 |= ADC12SC;  //开始转换
	_BIS_SR(LPM0_bits);	
}

#pragma vector = ADC_VECTOR
__interrupt void ADC12ISR (void)
{
	static unsigned int index = 0;
	results[index] = ADC12MEM0;
	index = (index+1)%Num_of_Results;	
}