STC12单片机频率捕获程序

#include "stc.H" #include "delay.h" #define uchar unsigned char #define uint unsigned int uint temp; sbit RS = P2^4; //定义端口 sbit RW = P2^5; sbit EN = P2^6; #define RS_CLR RS=0 #define RS_SET RS=1 #define RW_CLR RW=0 #define RW_SET RW=1 #define EN_CLR EN=0 #define EN_SET EN=1 #define DataPort P0 /*------------------------------------------------ 判忙函数 ------------------------------------------------*/ bit LCD_Check_Busy(void) { DataPort= 0xFF; RS_CLR; RW_SET; EN_CLR; delayus(20); EN_SET; return (bit)(DataPort & 0x80); } /*------------------------------------------------ 写入命令函数 ------------------------------------------------*/ void LCD_Write_Com(unsigned char com) { while(LCD_Check_Busy()); //忙则等待 RS_CLR; RW_CLR; EN_SET; DataPort= com; delayus(20); EN_CLR; } /*------------------------------------------------ 写入数据函数 ------------------------------------------------*/ void LCD_Write_Data(unsigned char Data) { while(LCD_Check_Busy()); //忙则等待 RS_SET; RW_CLR; EN_SET; DataPort= Data; delayus(20); EN_CLR; } /*------------------------------------------------ 清屏函数 ------------------------------------------------*/ void LCD_Clear(void) { LCD_Write_Com(0x01); delayms(10); } /*------------------------------------------------ 写入字符串函数 ------------------------------------------------*/ void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s) { if (y == 0) { LCD_Write_Com(0x80 + x); //表示第一行 } else { LCD_Write_Com(0xC0 + x); //表示第二行 } while (*s) { LCD_Write_Data( *s); s ++; } } /*------------------------------------------------ 写入字符函数 ------------------------------------------------*/ void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data) { if (y == 0) { LCD_Write_Com(0x80 + x); } else { LCD_Write_Com(0xC0 + x); } LCD_Write_Data( Data); } /*------------------------------------------------ 初始化函数 ------------------------------------------------*/ void LCD_Init(void) { LCD_Write_Com(0x38); /*显示模式设置*/ delayms(10); LCD_Write_Com(0x38); delayms(10); LCD_Write_Com(0x38); delayms(10); LCD_Write_Com(0x38); LCD_Write_Com(0x08); /*显示关闭*/ LCD_Write_Com(0x01); /*显示清屏*/ LCD_Write_Com(0x06); /*显示光标移动设置*/ delayms(10); LCD_Write_Com(0x0C); /*显示开及光标设置*/ } void main(void) { LCD_Init(); // AUXR=(AUXR|0x40); BRT=256-250; WAKE_CLKO=(WAKE_CLKO|0x40); CMOD=0x00; CCAPM0=(CCAPM0|0x20); CCAPM0=(CCAPM0|0x01); CL=0; CH=0; EA=1; AUXR=(AUXR|0x10); CR=1; while(1) { LCD_Write_Char(0,0,temp/10000+0x30); LCD_Write_Char(1,0,temp/1000%10+0x30); LCD_Write_Char(2,0,temp%1000/100+0x30); LCD_Write_Char(3,0,temp%100/10+0x30); LCD_Write_Char(4,0,temp%10+0x30); delayms(100); } } void PCAinter(void) interrupt 7 { CCF0=0; temp=CCAP0H; temp<<=8; temp=CCAP0L; }