PIC16C74 MCU display program

Single chip microcomputer STM32L151CCU6

1206RGB (single)

Crystal oscillator

Mobile phone crystal 3.2*2.5mm 3225 26M (26.000MHZ) 7.5PF 10PPM 20PPM 30PPM

PIC16C74 MCU display program

/*******************************************
************PIC16C74 MCU Control**************
********************************************/
#include //
#include //
#include //
#defineucharunsignedchar//
#defineuintunsignedint//
//---------------------------------------
#defineBIAS0X50//1/2 bias, 4 back pole
#defineRC2560X30//System clock is selected as on-chip RC oscillator
#defineWDTDIS10X0A//Disable WDT overflow flag output
#defineTIMERDIS0X08//Time base output disable
#defineSYSEN0X02//Open the system clock
#defineLCDON0X06//Open bias generator
#defineSYSDIS0X00//Turn off the system clock and bias generator

#defineKEY_UPRB7//
#defineKEY_DOWNRB6//
#defineKEY_SETRB5//
//--------------------------------------
//staticunsignedcharKeyV, TempKeyV; / / key value
Unsignedcharbuf0, buf1, buf2, buf3, buff;//
Unsignedcharbuf[4];//
Unsignedchark,data,sreg,disppoint;//
Unsignedinti;//
Consttable[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xd8,0x80,0x90};//
//*********************************
/*delay function*/
//*********************************
Voiddelay_10ms()//
{uintj;//
For(j=0;j<1000;j++)//
{;}//
}//
//*********************************
Voiddelay_1ms()//
{uintj;//
For(j=0;j<100;j++)//
{;}//
}//
//**********************************
Voiddelay1s()//delay 1S
{
Uchari;//
Uintj;//
For(i=0;i<10;i++)//
For(j=0;j<1300;j++);//
}//
//**********************************
/ / button waiting program
//**********************************
Voidkeywait()//
{
While((PORTB&0xF0)!=0xF0)//
{;}//
}//
//********************************


//********************************
Voidbuf_initial()//
{
Buf0=0x00;//
Buf[0]=buf0;//
Buf1=0x00;//
Buf[1]=buf1;//
Buf2=0x00;//
Buf[2]=buf2;//
Buf3=0x00;//
Buf[3]=buf3;//
Sreg=0x00;//
}//
//**********************************
Voidput_num(charc)
{
PORTC=table[c&0x0f];//
}
//**********************************
Voiddisplay()//
{
Disppoint=0;//
Put_num(buf[disppoint]);//
RC0=0;//
Delay_1ms();//
RC0=1;//

Disppoint++;//
Put_num(buf[disppoint]);//
RC1=0;//
Delay_1ms();//
RC1=1;//

Disppoint++;//
Put_num(buf[disppoint]);//
RC2=0;//
Delay_1ms();//
RC2=1;//

Disppoint++;//
Put_num(buf[disppoint]);//
RC3=0;//
Delay_1ms();//
RC3=1;//
}

//**********************************
//AD conversion initialization subroutine //
//*********************************
Voidad_initial()//
{
ADCON0=0B01001001;//fosc/8RA1/AN1ADON=1
ADCON1=0B00000010;//AN0-AN4=AVREF=VDD
ADIE=1;//
PEIE=1;//
}
//**********************************
//Key processing subroutine //
//**********************************
Voidkeywork()//
{
If((PORTB&0xFF)!=0xFF)//If P1.2--P1.4 is not all 1, there may be a key press
{
Delay_10ms();//delay debounce
If((PORTB&0xFF)!=0xFF)//Reread P1.2-P1.4 bit, if it is still not all 1, there is a key press
{
If((PORTB&0xF0)!=0xF0)//Reread P1.2-P1.4 bit, if it is still not all 1, there is a key press
{
//-------------------------------------------
If(KEY_SET==0)//Press the SET button, such as exiting in the SET state, otherwise enter
{
RC4=!RC4;
Keywait();
Return;
}
Elseif (KEY_DOWN==0) / / press the DOWN button
{
RC3=!RC3;
Keywait();
Return;
}
Elseif (KEY_UP==0) / / press the UP button
{
RC2=!RC2;
Keywait();
Return;
}

}
}
}
}

//--------------------------------------



//--------------------------------------
//Tmr0 interrupt program
Voidinterruptclkint(void)
{
TMR0=0x13;//
T0IF=0;//
CLRWDT();//
Sreg=sreg+1;//
If(sreg==40)//
{//
Sreg=0;//
Buf[3]++;
If(buf[3]>9)
{buf[3]=0;
Buf[2]++;
If(buf[2]>9)
{buf[2]=0;
Buf[1]++;
If(buf[1]>9)
{buf[1]=0;
Buf[0]++;
If(buf[0]>9)buf[0]=0;
}
}
}
}
}
/*******************************Main function ****************** **************/
Main()//main function
{
OPTION=0B00000000;//
STATUS=0X00;//
ADCON1=0B00000000;//
INTCON=0X00;//
PIE1=0B00000000;//
PIR1=0X00;//
T1CON=0B00000000;//

T0CS=0;//
PSA=1;//
T0IF=0;//
T0IE=1;//

TRISB=0XFF;//
TRISC=0X00;//
PORTB=0XFF;//
PORTC=0X00;//
Buf_initial();//
While(1)//
{
Keywork();//
}
}