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- #include "msp430g2231.h"
-
- void main(void)
- {
- WDTCTL = WDTPW + WDTHOLD; // Stop WDT
- ADC10CTL0 = ADC10SHT_2 + ADC10ON + ADC10IE; // 转换时钟选择 ADC10ON(打开ADC10), interrupt enabled(使能中断)
- ADC10CTL1 = INCH_1; // input A1(选择输入通道A1,对应P1.1口)
- ADC10AE0 |= 0x02; // PA.1 ADC option select (使能P1.1模拟输入)
- P1DIR |= 0x01; // Set P1.0 to output direction (P1.0为输出模式)
-
- for (;;)
- {
- ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start (ADC10开始采样转换)
- __bis_SR_register(CPUOFF + GIE); // LPM0, ADC10_ISR will force exit (开总中断,低功耗模式)
- /*******翻转P1.0口状态******/
- if (ADC10MEM < 0x1FF)
- P1OUT &= ~0x01; // Clear P1.0 LED off
- else
- P1OUT |= 0x01; // Set P1.0 LED on
- }
- }
-
- // ADC10 interrupt service routine
- #pragma vector=ADC10_VECTOR
- __interrupt void ADC10_ISR(void)
- {
- __bic_SR_register_on_exit(CPUOFF); // Clear CPUOFF bit from 0(SR)
- }
呵呵,又是抄的官方例程,结合手册分析起来不是很难,由于我手头没有什么模拟输出设备,所以该程序下载到板子上的效果是LED0一直亮着,找一条杜邦线,一头连在板子的地端(GND),另一头接在P1.1口,LED0灭
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