#include#include #inclde void delay(unsigned char time)//必须声明函数,否则会出现下面的错误: void main() { P0 = 0xfe;//P必须大写 while(1) { delay(200); P0 = _cror_(P0,1); } } void delay() { unsigned char I,j; for(i=0;i<=time;i++) { for(j=0;j<=200;j++) { _nop_();//空指令,根据单片机的机器周期计算 } } }
数据类型 |
位数 |
字节数 |
数值范围 |
说明 |
bit |
1 |
|
0 or 1 |
位型 |
Signed char |
8 |
1 |
-128——+127 |
有符号字节型 |
Unsigned char |
8 |
1 |
0~255 |
字符或者八位无符号整数 |
enum |
16 |
2 |
-32768~+32767 |
枚举型 |
Signed short |
16 |
2 |
-32768~+32767 |
有符号短整型 |
Unsigned short |
16 |
2 |
0~6535 |
无符号短整型 |
Signed int |
16 |
2 |
-32768~32767 |
|
Unsigned int |
|
|
|
|
Signed long |
|
|
|
|
Unsigned long |
|
|
|
|
float |
|
|
|
|
Sbit |
1 |
|
0 1 |
位型 |
Sfr |
8 |
1 |
0~255 |
8位特殊功能寄存器 |
Sfr16 |
|
|
|
|
|
|
|
|
|
#include#include #include sbit P0_0 = P0^0;//I/O口的定义方法,两者的区别,不这样定义的话就会说没有定义 sbit P0_1 = P0^1; sbit P0_2 = P0^2; sbit P0_3 = P0^3; sbit P0_4 = P0^4; sbit P0_5 = p0^5; sbit P0_6 = P0^6; sbit P0_7 = P0^7; void delay(unsigned char time);//函数声明,重要 void main() { while(1) { P0_0 = 0; delay(200); P0_1 = 0; delay(200); P0_3 = 0; delay(200); P0_4 = 0; delay(200); P0_5 = 0; delay(200); P0_6 = 0; delay(200); P0_7 = 0; delay(200); } void delay(unsigned char time) { unsigned char i,j; for(i=0;i<=time;i++) { for(j=0;j<=200;j++) { _nop_() } } } 控制亮灭程序: #include //端口定义已包含在此头文件中,故P0可以直接赋值 #include #include void delay(unsigned char time); void delay(unsigned char time) { unsigned i,j; for(i=0;i<=time;i++) { for(j=0;j<=200;j++) { _nop_(); } } } void main() { while(1) { P0 = 0x00; delay(200); P0 = 0xff; delay(200); } }
『本文转载自网络,版权归原作者所有,如有侵权请联系删除』