STM32+74HC595源码三位数码管显示时间，按键调节时间加减，一个按键执行 -

#include "stm32f10x.h"
#include "HC595.h"
#include "delay.h"
#include "key.h"
#define uint unsigned int
#define uchar unsigned char
//初始化PA0、PA1和PA2为输出口，并使能这个端口的时钟
//HC595 IO初始化
void HC595_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能PA端口时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2; //端口配置
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2); //PA0,1,2 输出高
}
void HC595_Display(unsigned char Bai, unsigned char Shi, unsigned char Ge)
{
uchar k;
uchar n = Ge;
uchar m = Shi;
uchar x = Bai;
for(k=0;k<8;k++)
{
if(n&0x80) HC595_SDI = 1;
else HC595_SDI = 0; //判断当前发送位数据
n <<= 1; //左移一位
HC595_CLK = 0;
//delay_ms(1);
HC595_CLK = 1; //移位寄存器操作
//delay_ms(1);
}
for(k=0;k<8;k++)
{
if(m&0x80)HC595_SDI =1;
else HC595_SDI = 0; //判断当前发送位数据
m <<= 1; //左移一位
HC595_CLK = 0;
//delay_ms(1);
HC595_CLK = 1; //移位寄存器操作
//delay_ms(1);
}
for(k=0;k<8;k++)
{
if(x&0x80)HC595_SDI =1;
else HC595_SDI = 0; //判断当前发送位数据
x <<= 1; //左移一位
HC595_CLK = 0;
//delay_ms(1);
HC595_CLK = 1; //移位寄存器操作
//delay_ms(1);
}
HC595_LE = 1;
//delay_ms(1);
HC595_LE = 0; //锁存数据
//delay_ms(1);
}
//void HC595_Off(void)
//{
// //OE = 1;
//}
//void SMG(void)
//{
//
// u8 key;
// int a=0;//b=0, c=0;
// unsigned char Bai_Wei,Shi_Wei,Ge_Wei; //千位，百位，十位，个位Qian_Wei,
// //数码管编码
// unsigned char table[] =
// {0xc0,0xf9,0xa4,0xb0,0x99,
// 0x92,0x82,0xf8,0x80,0x90,
// 0xff,0x00,0x90,0x86,0xaf,
// 0xc0,0x89,0xc7,0x8e,0xc1,0x7f};
// //0,1,2,3,4,5,6,7,8,9,全暗,全亮,g,E,r,O,H,L,F,U,小数点,共阳数码管使用
//
//
// key=KEY_Scan(0); //扫描按键
// if(key==KEY_LEFT)
// {
// a++;
//
// }
// Bai_Wei = table[a];
// Shi_Wei = table[2];
// Ge_Wei = table[3];
// HC595_Display(Bai_Wei,Shi_Wei,Ge_Wei);
//}

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//2位数码管测试代码
//樊川技术
//实验现象：3位数码管轮流显示数码管编码表里面的字符
#include "led.h"
#include "delay.h"
#include "sys.h"
#include "HC595.h"
#include "key.h"
#include "time.h"
unsigned char Qian_Wei,Bai_Wei,Shi_Wei,Ge_Wei; //千位，百位，十位，个位
float d=0;
//数码管编码
unsigned char table[] =
{0xc0,0xf9,0xa4,0xb0,0x99,
0x92,0x82,0xf8,0x80,0x90,
0xff,0x00,0x90,0x86,0xaf,
0xc0,0x89,0xc7,0x8e,0xc1,0x7f};
//0,1,2,3,4,5,6,7,8,9,全暗,全亮,g,E,r,O,H,L,F,U,小数点,共阳数码管使用
unsigned char table1[] =
{0xc0,0xf9,0xa4,0xb0};
//0,1,2,3,4,5,6,7,8,9,全暗,全亮,g,E,r,O,H,L,F,U,小数点,共阳数码管使用
int KEY_ING=1;
int main(void)
{
u8 key;
int a=0,b = 0,c = 0;
SystemInit(); //系统时钟初始化为72M SYSCLK_FREQ_72MHz
delay_init(72); //延时函数初始化
NVIC_Configuration(); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
LED_Init(); //LED端口初始化
HC595_Init();
KEY_Init();
TIM4_Init(1000,36000-1); //定时500ms
// //清空LED数码管
// Bai_Wei = table[10];//清空LED
// Shi_Wei = table[10];//清空LED
// Ge_Wei = table[10];//清空LED
// HC595_Display(Bai_Wei, Shi_Wei,Ge_Wei);
// delay_ms(3000);
while(1)
{
key=KEY_Scan(0); //扫描按键
switch(key)
{
case KEY_DOWN: KEY_ING=1;break; //按下K_DOWN按键熄灭D2指示灯
case KEY_LEFT: c=c+5;break; //按下K_LEFT按键点亮D3指示灯
case KEY_RIGHT: c=c-5;break; //按下K_RIGHT按键熄灭D3指示灯
}
if(c == 10)
{
c = 0;
b++;
}
if(c == -5)
{
c = 5;
b--;
}
if(b == -1)
{
b = 9;
a--;
}
if(b == 10)
{
b = 0;
a++;
}
if(a == 3)
{
b= 0;
c= 0;
}
if(a <0)
{
a=0;
b=0;
c= 0;
}
d=a*10+b+0.1*c;
Bai_Wei = table1[a];
Shi_Wei = table[b];
Ge_Wei = table[c];
HC595_Display(Bai_Wei,Shi_Wei,Ge_Wei);
}
}

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