急求两位的（共阳）数码管倒计（倒计时从99到0）时（动态扫描的方法）
int a=2;//定义数字接口2 连接a 段数码管int b=3;// 定义数字接口3 连接b 段数码管
int c=4;// 定义数字接口4 连接c 段数码管
int d=5;// 定义数字接口5 连接d 段数码管
int e=6;// 定义数字接口6 连接e 段数码管
int f=7;// 定义数字接口7 连接f 段数码管
int g=8;// 定义数字接口8 连接g 段数码管
int dp=9;// 定义数字接口9 连接dp 段数码管
void digital_0(void) //显示数字0
{
unsigned char i;
digitalWrite(g,HIGH);
digitalWrite(dp,HIGH);
for(i=2;i<=7;i++)
digitalWrite(i,LOW);
}
void digital_1(void) //显示数字1
{
unsigned char i;
digitalWrite(b,LOW);//给数字接口3 引脚高电平，点亮b段
digitalWrite(c,LOW);//点亮c 段
for(i=5;i<=9;i++)//熄灭其余段
digitalWrite(i,HIGH);
digitalWrite(a,HIGH);
}
void digital_2(void) //显示数字2
{
digitalWrite(a,LOW);
digitalWrite(b,LOW);
digitalWrite(d,LOW);
digitalWrite(e,LOW);
digitalWrite(g,LOW);
digitalWrite(c,HIGH);
digitalWrite(f,HIGH);
digitalWrite(dp,HIGH);
}
void digital_3(void) //显示数字3
{
unsigned char i;
for( i=2;i<=5;i++)//熄灭其余段
digitalWrite(i,LOW);
digitalWrite(g,LOW);
digitalWrite(f,HIGH);
digitalWrite(e,HIGH);
digitalWrite(dp,HIGH);
}
void digital_4(void) //显示数字4
{
digitalWrite(b,LOW);
digitalWrite(c,LOW);
digitalWrite(f,LOW);
digitalWrite(g,LOW);
digitalWrite(a,HIGH);
digitalWrite(d,HIGH);
digitalWrite(e,HIGH);
digitalWrite(dp,HIGH);
}
void digital_5(void) //显示数字5
{
digitalWrite(a, LOW);
digitalWrite(c, LOW);
digitalWrite(d, LOW);
digitalWrite(f, LOW);
digitalWrite(g, LOW);
digitalWrite(b,HIGH);
digitalWrite(e,HIGH);
digitalWrite(dp,HIGH);
}
void digital_6(void) //显示数字6
{
unsigned char i;
for(i=4;i<=8;i++)
digitalWrite(i,LOW);
digitalWrite(b,HIGH);
digitalWrite(dp,HIGH);
}
void digital_7(void) //显示数字7
{
unsigned char i;
for(i=2;i<=4;i++)
digitalWrite(i,LOW);
for(i=5;i<=9;i++)
digitalWrite(i,HIGH);
}
void digital_8(void) //显示数字8
{
for( int i=2;i<=8;i++)
digitalWrite(i,LOW);
digitalWrite(dp,HIGH);
}
void digital_9(void) //显示数字9
{
unsigned char i;
for(i=2;i<=5;i++)
digitalWrite(i,LOW);
digitalWrite(f,LOW);
digitalWrite(g,LOW);
digitalWrite(e,HIGH);
digitalWrite(dp,HIGH);
}
void setup()
{
int i;//定义变量
for(i=2;i<=11;i++)
pinMode(i,OUTPUT);//设置2～11 引脚为输出模式
digitalWrite(10,HIGH);
digitalWrite(11,HIGH);
} 本帖最后由 275891381 于 2016-11-16 22:35 编辑
int weixuan_yinjiao={2,3};
int smg_yinjiao={4,5,6,7,8,9,10,11};
byte yangji= {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xff};//0-9和空
byte yinji={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x00};//yinji0-9 和空
void setup() {
for(int i=0;i<8;i++)
pinMode(smg_yinjiao, OUTPUT);
for(int i=0;i<2;i++)
pinMode(weixuan_yinjiao, OUTPUT);
for(int i=0;i<2;i++)
digitalWrite(weixuan_yinjiao, 1);
}
void smg(int num,int dian,int jixing)
{
int temp;
if(jixing==1)
temp=yangji;
else
temp=yinji;
for (int s = 0; s < 8; s++)
{
digitalWrite(smg_yinjiao, temp&0x01);
temp=temp>>1;
}
if(dian==1)
digitalWrite(smg_yinjiao, 0);
}
void saomiao(int num,int time_jiange,int jixing)
{
smg(num/10,0,jixing);
digitalWrite(weixuan_yinjiao,~jixing);
digitalWrite(weixuan_yinjiao,jixing);
delay(time_jiange);
smg(num%10,0,jixing);
digitalWrite(weixuan_yinjiao,jixing);
digitalWrite(weixuan_yinjiao,~jixing);
delay(time_jiange);
}
long time_old0=millis();
int k=0;
void loop() {
if(millis()-time_old0>1000)
{
k++;
time_old0=millis();
}
saomiao(k,10,0);
}
//扫描函数里面的delay最好也改成millis()控制不然系统就饿没空干别的了 275891381 发表于 2016-11-16 22:27
谢谢啊！等着晚上试试，还请大神赐教
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