蓝桥杯之动态数码管快捷编写
1、参加蓝桥杯的同学一定能看懂,按我的步骤打开,我的是2017年的版本,你们根据自己需要自己找合适的吧
2、打开C程序、点击复制代码、粘贴到keil4
3、复制代码后、你需要修改这三处
在【1】处加头文件:#include "intrins.h"
在【2】处修改晶振:18432000L 改成 11059200L
在【3】处修改点亮灯的方式为:P2 = 0x80; P0 = ~P0; P2 = 0;
4、修改好的程序如下,你们检查自己的是否正确
5、修改完成无误后,烧写看到现象:【8个led开始亮灭,周期1s】
6、上一个步骤只是一个测试程序,接下来教你怎样写:动态数码管
7、自己先拿电脑上的画板把共阳极的段码自己画一遍,正确的段码为:0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90
8、修改程序如下
9、我这里给出源代码、但是你们一定要先按照的我的步骤【自己写一遍】,这样才有效果!!!
/*------------------------------------------------------------------*/
/* --- STC MCU Limited ---------------------------------------------*/
/* --- STC89-90xx Series 16-bit Timer Demo -------------------------*/
/* --- Mobile: (86)13922805190 -------------------------------------*/
/* --- Fax: 86-755-82905966 ----------------------------------------*/
/* --- Tel: 86-755-82948412 ----------------------------------------*/
/* --- Web: www.STCMCU.com -----------------------------------------*/
/* If you want to use the program or the program referenced in the */
/* article, please specify in which data and procedures from STC */
/*------------------------------------------------------------------*/
#include "reg51.h"
#include "intrins.h"
typedef unsigned char BYTE;
typedef unsigned int WORD;
//-----------------------------------------------
/* define constants */
#define FOSC 11059200L
#define T1MS (65536-FOSC/12/1000) //1ms timer calculation method in 12T mode
/* define SFR */
sbit TEST_LED = P1^0; //work LED, flash once per second
/* define variables */
WORD count; //1000 times counter
BYTE T_display[10] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
BYTE T_buff[8] = {0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
//-----------------------------------------------
/* Timer0 interrupt routine */
void tm0_isr() interrupt 1 using 1
{
static BYTE i = 0;
TL0 = T1MS; //reload timer0 low byte
TH0 = T1MS >> 8; //reload timer0 high byte
if (count-- == 0) //1ms * 1 -> 1ms
{
count = 1; //reset counter
P2 = 0xE0;P0 = T_display[i]; P2 = 0;
//duan_xuan
P2 = 0xC0;P0 = T_buff[i]; P2 = 0; //wei_xuan
if(++i == 8) i = 0;
}
}
//-----------------------------------------------
/* main program */
void main()
{
P2 = 0x80;P0 = 0xFF; P2 = 0;
P2 = 0xA0;P0 = 0x00; P2 = 0;
TMOD = 0x01; //set timer0 as mode1 (16-bit)
TL0 = T1MS; //initial timer0 low byte
TH0 = T1MS >> 8; //initial timer0 high byte
TR0 = 1; //timer0 start running
ET0 = 1; //enable timer0 interrupt
EA = 1; //open global interrupt switch
count = 0; //initial counter
while (1); //loop
}
10、执行成功后,你们将看到动态数码管的显示效果(01234567)了,我这种方法也是视频里老师教的(谢谢老师,老师莫生气哦),只不过我把内容细化了一下,哈哈,大家一起学习嘛!共同进步!!