PIC16F887 串口 LCD1602 按键

#include

#include

#include

#include

#define uchar unsigned char

#define uint unsigned int

/* CONFIG1 */

#pragma config FOSC = XT        /* Oscillator Selection bits (XT oscillator: Crystal/resonator on RA6/OSC2/CLKOUT and RA7/OSC1/CLKIN) */

#pragma config WDTE = OFF       /* Watchdog Timer Enable bit (WDT disabled and can be enabled by SWDTEN bit of the WDTCON register) */

#pragma config PWRTE = OFF      /* Power-up Timer Enable bit (PWRT disabled) */

#pragma config MCLRE =ON        /* RE3/MCLR pin function select bit (RE3/MCLR pin function is digital input, MCLR internally tied to VDD) */

#pragma config CP = OFF         /* Code Protection bit (Program memory code protection is disabled) */

#pragma config CPD = OFF        /* Data Code Protection bit (Data memory code protection is disabled) */

#pragma config BOREN = OFF      /* Brown Out Reset Selection bits (BOR disabled) */

#pragma config IESO = OFF       /* Internal External Switchover bit (Internal/External Switchover mode is disabled) */

#pragma config FCMEN = OFF      /* Fail-Safe Clock Monitor Enabled bit (Fail-Safe Clock Monitor is disabled) */

#pragma config LVP = OFF        /* Low Voltage Programming Enable bit (RB3 pin has digital I/O, HV on MCLR must be used for programming) */

/* CONFIG2 */

#pragma config BOR4V = BOR40V   /* Brown-out Reset Selection bit (Brown-out Reset set to 4.0V) */

#pragma config WRT = OFF        /* Flash Program Memory Self Write Enable bits (Write protection off) */

void delaya_US( unsigned char n );

void LCD_CSH( void );

void LCD_WRITE_4( unsigned char R1, unsigned char FLAG );

void LCD_WRITE( unsigned char R1, unsigned char FLAG );

unsigned char LCD_READ( void );

void LCD_BUSY( void );

void delaya( unsigned int n );

/* LCD显示相关 */

#define DATA 1                                       /* LCD写数据时为1 */

#define COM 0                                       /* LCD写命令时为0 */

#define LINE1 0b10000000

#define LINE2 0b11000000

#define LCD_E RD6

#define LCD_RW RD5

#define LCD_RS RD4

/* ======延时(n×10)us */

void delaya_US( unsigned char n )

{

unsigned char j;

for ( j = 0; j < n; j++ )

{

NOP(); NOP();

}

}

/* LCD初始化 */

void LCD_CSH( void )

{

TRISD = 0x00;  /* RD方向输出 */

delaya( 20 );

LCD_WRITE_4( 0b0011, COM );

delaya( 5 );

LCD_WRITE_4( 0b0011, COM );

delaya_US( 10 );

LCD_WRITE_4( 0b0011, COM );

delaya_US( 10 );

LCD_WRITE_4( 0b0010, COM );

LCD_BUSY();

LCD_WRITE( 0b00101000, COM );

LCD_WRITE( 0b00001100, COM );

LCD_WRITE( 0b00000001, COM );

delaya( 2 );

LCD_WRITE( 0b00000110, COM );

}

/* LCD写4位命令 */

void LCD_WRITE_4( unsigned char R1, unsigned char FLAG )

{

LCD_RW = 0; NOP();

LCD_RS = FLAG;

PORTD &= 0xF0;

LCD_E = 1; NOP();

PORTD |= R1;

NOP(); NOP();

LCD_E = 0; NOP();

LCD_RS = 0; NOP();

PORTD &= 0xF0;

}

/* LCD写命令 */

void LCD_WRITE( unsigned char R1, unsigned char FLAG )

{

unsigned char R2;

LCD_BUSY();

LCD_RW = 0; NOP();

LCD_RS = FLAG;

R2 = (R1 >> 4) & 0x0F;

PORTD &= 0xF0; NOP();

LCD_E = 1;

PORTD |= R2;

NOP(); NOP();

LCD_E = 0;

R2 = R1 & 0x0F;

PORTD &= 0xF0; NOP();

LCD_E = 1; NOP();

PORTD |= R2;

NOP(); NOP();

LCD_E = 0; NOP();

LCD_RS = 0; NOP();

PORTD &= 0xF0;

}

/* 读LCD状态 */

unsigned char LCD_READ( void )

{

unsigned char R1;

TRISD = 0x0F;

LCD_RS = 0; NOP();

LCD_RW = 1;

NOP(); NOP();

LCD_E = 1;

NOP(); NOP();

NOP(); NOP();

R1 = 0;

R1 = (PORTD << 4) & 0xF0;

LCD_E = 0;

NOP(); NOP();

NOP(); NOP();

LCD_E = 1;

NOP(); NOP();

R1 |= (PORTD & 0x0F);

LCD_E = 0; NOP();

LCD_RW = 0;

TRISD = 0x00;

return(R1);

}

/* 检测LCD是否忙 */

void LCD_BUSY( void )

{

unsigned char R1;

do

{

R1 = LCD_READ();

}

while ( (R1 & 0x80) == 0x80 );

}

/* ======延时(n)ms */

void delaya( unsigned int n )

{

unsigned int j;

unsigned char k;

for ( j = 0; j < n; j++ )

for ( k = 246; k > 0; k-- )

NOP();

}

/*

 * ***********************************************************************

 * 显示屏字符串写入函数

 * ***********************************************************************

 */

void LCD_write_str( unsigned char x, unsigned char y, char *s )

{

if ( y == 0 )

{

LCD_WRITE( 0x80 + x, COM );

}else {

LCD_WRITE( 0xC0 + x, COM );

}

while ( *s )

{

LCD_WRITE( *s, DATA );

s++;

}

}

#define K1 RC0

#define K2 RC1

int Keyscan( void )

{

TRISC |= 0x03;                   /*按键是输入 */

if ( K1 == 0 )

{

delaya( 5 );

if ( K1 == 0 )

{

while ( K1 == 0 )

;       /* 等待按键松开 */

return(1);

}

}

if ( K2 == 0 )

{

delaya( 5 );

if ( K2 == 0 )

{

while ( K2 == 0 )

;  /* 等待按键松开 */

return(2);

}

}

return(0);

}

/*********************************************************************************

 * 【函 数 名】： void send_cmd(unsigned char dat)

 * 【功    能】： 串口发送数据命令

 **********************************************************************************/

void send( unsigned char dat )

{

TXREG = dat;

while ( TRMT != 1 )

;  /* 等待发送完成 */

}

/*********************************************************************************

 * 【函 数 名】： Print_Str(unsigned char *s)

 * 【功    能】： 串口发送 一个字符串

 **********************************************************************************/

void Print_Str( unsigned char *s )

{

while ( *s != '' )

{

send( *s++ );

}

}

void dispaly_rtctime(unsigned char h,unsigned char m,unsigned char s)

{

    char xianshi[15];

    char count=0;

    xianshi[count++]='0'+h%100/10;

    xianshi[count++]='0'+h%10;

     xianshi[count++]=':';

    xianshi[count++]='0'+m%100/10;

    xianshi[count++]='0'+m%10;

     xianshi[count++]=':';

    xianshi[count++]='0'+s%100/10;

    xianshi[count++]='0'+s%10;

    xianshi[count++]=0;

    LCD_write_str(0,0,xianshi);

}

#define LED RB0

int led_flash = 0;                  /* 为1就闪烁灯定时器闪烁  串口接受会改变这个值 */

unsigned int T1_10MS;                        /* 频率 */

char recdata;                        /* 接受字符 */

char rev_ifg = 0;

char rev_buffer[5];                  /* 装下信息 */

char rev_buffer_count = 0;

int time = 0;    /* 计时 */

char ledifg = 0;

int time1 = 0;

unsigned char rtc_hour = 23;

unsigned char rtc_min = 59;

unsigned char rtc_sec = 55;

void main( void )

{

int key = 0;

ANSEL = 0;                            /*选择ADC引脚 */

ANSELH = 0;

T1CON = 0b00100001;                   /* 内部时钟源 （F OSC /4） */

GIE = 1; PEIE = 1; TMR1IE = 1;

TMR1IF = 0;

T1_10MS = 100;                          /* 执行定时器中断的频率 */

T1_10MS = 1000000 / T1_10MS;            /* 多少时间 也就是选择频率 */

T1_10MS = (65535 - T1_10MS / 4);        /* 给到硬件定时器 */

TMR1H = T1_10MS >> 8;

TMR1L = T1_10MS;

/* 串口初始化 */

SPBRG = 25;                           /* 4mhz 9600 */

TXSTA = 0X24;

RCSTA = 0X90;

RCIE = 1;

CREN = 1;

SYNC = 0;

SPEN = 1;

GIE = 1;

PEIE = 1;

TRISC6 = 0;

TRISC7 = 1;

RC6 = 1;

RC7 = 1;

/* 小灯是输出 */

TRISB = 0x00;

LED = 1; /* 输出高 不亮的 */

    LCD_CSH();

delaya( 30 );

while ( 1 )

{

key = Keyscan();        /* key 有按键1或者2 否则就是0 */

if ( key != 0 )

{

led_flash = 0;  /*不再闪烁灯 */

}

}

}

void interrupt high_isr( void )         /* 也可以加 high_priority */

{

unsigned char xianshi[20];

if ( TMR1IF )                   /* 中断一次 */

{

/* 重新给时间 */

TMR1IF = 0;

TMR1H = T1_10MS >> 8;

TMR1L = T1_10MS;

time1++;

if ( time1 > 100 )

{

time1 = 0; /* 1s时间 */

            //更新时间

rtc_sec++;

if ( rtc_sec == 60 )

{

rtc_sec = 0;

rtc_min++;

if ( rtc_min == 60 )

{

rtc_min = 0;

rtc_hour++;

if ( rtc_hour == 24 )

{

rtc_hour = 0;

}

}

}

            //显示时间

            if(led_flash==0)

            {

                dispaly_rtctime(rtc_hour,rtc_min,rtc_sec);

            }

}

/*下面就是控制小灯闪烁 */

time++;

if ( time > 10 )

{

time = 0;

if ( led_flash == 1 )

{

ledifg = !ledifg;

if ( ledifg == 0 )

LED = 0;

else LED = 1;

}

}

}  else if ( RCIF )

{

/* 串口接受中断 */

RCIF = 0;

recdata = RCREG;

send( recdata );

        if ( rev_ifg == 2 )

{

            rev_buffer[rev_buffer_count++] = recdata;       /* 接受 */

if ( rev_buffer_count == 4 )

{

/* 接受到了4个字符 比如2房3床 就是接收到0203 */

                LCD_CSH();

                delaya( 30 );

LCD_write_str( 0, 0, rev_buffer );      /* 显示出来 */

                rev_ifg=0;