MSP430数码管的使用Ⅰ

首先应该了解数码管及其工作原理。了解你使用的是共阴还是共阳数码管，其次了解数码管的段选位选。

接下来是一个例程

#include

typedef unsigned char uchar;

#define wei_h P5OUT |= BIT5

#define wei_l P5OUT &= BIT5

#define duan_l P6OUT &= ~BIT6

#define duan_h P6OUT |= BIT6

uchar table[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

uchar num = 0;

void main( void )

{

P1DIR = 0XFF;P1OUT = 0XFF;

P2DIR = 0XFF;P2OUT = 0XFF;

P3DIR = 0XFF;P3OUT = 0XFF;

P4DIR = 0XFF;P4OUT = 0XFF;

P5DIR = 0XFF;P5OUT = 0XFF;

P6DIR = 0XFF;P6OUT = 0XFF;

// Stop watchdog timer to prevent time out reset

WDTCTL = WDT_ADLY_1_9;

IE1 |= WDTIE;

P6DIR |= BIT2;P6OUT |= BIT2;

P5DIR = 0XFF;

P4DIR = 0XFF;

P5OUT = 0X00;

P4OUT = 0XFF;

_BIS_SR(LPM3_bits + GIE);

}

#pragma vector = WDT_VECTOR

__interrupt void watchdog_timer(void)

{

P4OUT = table[num];

duan_h;

duan_l;

P4OUT = ~(1 << num);

wei_h;

wei_l;

num++;

if(num == 8)

num = 0;

}

MSP430的输出方向的设置非常重要。切勿忘记。