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和上一篇文章一样，用到了 TM1638。计时器初值设为 23:57:45，计时到 23:59:59 时重置为 0点 0分 0秒。
（和上次的定时器一样，主函数中的delay是我自己写的，是为了便于调试，并没有真正起到延时1s的作用）
源の代码：
#include "TM1638.h"
#include "msp430f6638.h"
#include "stdint.h"
uint8_t num[8]; //各个数码管显示的值
uint8_t led_flag[8];
const uint8_t tab[] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x00};
void init_port(void) {
P3DIR |= BIT5;
P3DIR |= BIT4 + BIT2;
P1DIR |= BIT0; // ACLK set out to pins
P1SEL |= BIT0;
}
const uint8_t tab2[] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71};
void TM1638_Write(unsigned char DATA) { //写数据函数
unsigned char i;
DIO_OUT;
for(i=0;i<8;i++) {
CLK_low;
if(DATA & 0x01)
DIO_high;
else
DIO_low;
CLK_high;
DATA >>= 1;
}
}
unsigned char TM1638_Read(void) { //读数据函数
unsigned char i;
unsigned char temp=0;
DIO_IN;
STB_low;
for(i=0;i<8;i++) {
temp >>= 1;
CLK_low;
_delay_us(100);
if(DIO_READ)
temp |= 0x80;
else
temp &= 0x7f;
CLK_high;
}
return temp;
}
void Write_COM(unsigned char cmd) { //发送命令字
CLK_high;
STB_high;
STB_low;
TM1638_Write(cmd);
STB_high;
}
void Write_DATA(unsigned char add,unsigned char DATA) { //指定地址写入数据
Write_COM(0x44);
STB_low;
TM1638_Write(0xc0|add);
TM1638_Write(DATA);
STB_high;
}
void init_TM1638(void) {
unsigned char count = 0;
unsigned char times = 1;
while(times--) {
Write_allLED(tab2[count]);
count++;
if(count == 16)
count = 0;
_delay_ms(100);
}
Write_allLED(0xff);
_delay_ms(100);
Write_allLED(0);
}
void delay() {
for (int i=0; i<10; i++)
for (int j=0; j<1000; j++);
}
void Write_allLED(unsigned char DATA) {
unsigned char i;
Write_COM(0x8F);//显示控制
Write_COM(0x40); //数据命令
STB_low;
TM1638_Write(0xc0);
for(i=0;i<16;i++)
TM1638_Write(DATA);
STB_high;
}
void main(void) {
WDTCTL = WDTPW+WDTHOLD;
init_port();
init_TM1638();
int hourA = 2;
int hourB = 3;
int minuteA = 5;
int minuteB = 7;
int secondA = 4;
int secondB = 5;
while(1) {
secondB++;
if(secondB == 10) {
secondB = 0;
secondA++;
if(secondA == 6) {
secondA = 0;
minuteB++;
if(minuteB == 10) {
minuteB = 0;
minuteA++;
if(minuteA == 6) {
minuteA = 0;
hourB++;
if(hourB == 10) {
hourB = 0;
hourA++;
}
if(hourA == 2 && hourB == 4) {
hourA = 0;
hourB = 0;
}
}
}
}
}
Write_DATA(4*2,tab[hourA]);
Write_DATA(5*2,tab[hourB]);
Write_DATA(6*2,tab[15]);
Write_DATA(7*2,tab[minuteA]);
Write_DATA(0*2,tab[minuteB]);
Write_DATA(1*2,tab[15]);
Write_DATA(2*2,tab[secondA]);
Write_DATA(3*2,tab[secondB]);
delay();
}
}
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