今天学习了七段数码管的显示，下午编写了一个表的程序
void display(uint8_t val, uint8_t bit);
const uint8_t code_pins[] = {1,2,3,4,5,6,7,8}; //a~h段输出引脚
const uint8_t bit_pins[] = {9,10,11,12}; //位
const uint8_t decode[] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71}; //共阴极译码值
uint8_t fen1=0;
uint8_t fen2=8;
uint8_t miao1=0;
uint8_t miao2=0;
void setup() {
for (int i = 0; i<8; i++) {
pinMode(code_pins[i], OUTPUT); // 送段值引脚初始化
}
for (int i = 0; i < 4; i++) {
pinMode(bit_pins[i], OUTPUT); // 送位值引脚初始化
}
}
void loop() {
for(int j=0;j<9;j++)
{display(fen1,0);
delay(24);
display(fen2,1);
delay(24);
display(miao1,2);
delay(24);
display(miao2,3);
delay(24);}
if(miao2<9)
miao2++;
else if(miao1<5)
{miao1++;miao2=0;}
else if(fen2<9)
{fen2++;miao1=0;miao2=0;}
else if(fen1<5)
{fen1++;fen2=0;miao1=0;miao2=0;}
else
{ fen1=0;
fen2=0;
miao1=0;
miao2=0;}
}
void display(uint8_t val, uint8_t bit) {
uint8_t code = decode[val];
for (int i = 0; i < 8; i++ ) {
digitalWrite(code_pins[i],code & ((uint8_t)1< for (int i = 0; i < 4; i++) { if (i == bit) { digitalWrite(bit_pins[i], LOW); // 选择位有效 } else { digitalWrite(bit_pins[i], HIGH); } } }