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51單片機實驗仿真原理圖如下（proteus仿真工程文件可到本帖附件中下載）
程序源碼
- #include <reg51.h>
- typedef unsigned char uint8;
- typedef unsigned int uint16;
- code uint8 LED_CODE[] = {0xC0,0xF9,0xA4,0xB0};
- void delay(uint16 x)
- {
- uint16 i,j;
- for(i = x; i > 0; i --)
- for(j = 114; j > 0; j --);
- }
- void main()
- {
- uint8 i;
- while(1)
- {
- for(i = 0; i < 4; i ++)
- {
- P3 = 0x01 << i;
- P0 = LED_CODE[ i]; delay(500); } }}
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![_A6~`$ZA3O@7$])101)Y0Q9.png](http://c.51hei.com/d/forum/202002/17/145655a1emocluoyo6v6ol.png "_A6~`$ZA3O@7$])101)Y0Q9.png")
