PIC12F508 MCU Learning Part 3 - Wake up by pressing a button-EEWORLD

Collect

The PIC12F508 microcontroller has no interrupts, and key interrupts can only be used in a query mode.

The compiler used is XC8, and the compilation environment IDE used is MPLAB X IDE.

The downloader is PICKIT3.

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

// __________________

// VDD-| 1 8 |-VSS

// GP5-| 2 27 |-GP0/DAT

// GP4-| 3 26 |-GP1/CLK

//GP3/RMCLR--| 4 25 |-GP2

// |________________|

// 12F508

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

//Watchdog sleep wakeup

//Button wake up

#include

// #pragma config statements should precede project file includes.

// Use project enums instead of #define for ON and OFF.

// CONFIG

#pragma config OSC = IntRC // Oscillator Selection bits (internal RC oscillator)

#pragma config WDT = ON // Watchdog Timer Enable bit (WDT Enable )

#pragma config CP = OFF // Code Protection bit (Code protection off)

#pragma config MCLRE = OFF // GP3/MCLR Pin Function Select bit (GP3/MCLR pin function is digital input, MCLR internally tied to VDD)

#define uchar unsigned char

#define uint unsigned int

#define LED1 GP5

#define LED2 GP4

#define KEY GP3

bit KEY_F;

uchar count;

//flying GP3_F;

void Init()

{

TRIS=~0x3F; //GP3 input, other outputs

// OPTION = 0x07; //This register is reset to 1 on power-on

// OPTION=nGPWU|nGPPU|PSA|PS1|PS2; //Pin interrupt wake-up disable weak pull-up disable timer allocation watchdog time is 18Ms*64=1.152S

OPTION=0x1E; // Pin interrupt wake-up enable weak pull-up enable The timer allocates the watchdog time to be 18Ms*64=1.152S

// TMR0=0x63; //10ms

}

void main()

{

Heat();

while(1)

{

if((GPWUF==1)&&(KEY==0)) //Interrupt wakeup caused by pin

{

LED2=~LED2;

}

if(nTO==0) //Reset caused by watchdog

{

LED1=~LED1;

}

KEY_F=KEY; //Read the key status before sleep.

SLEEP();

}

Keywords：PIC12F508 Reference address：PIC12F508 MCU Learning Part 3 - Wake up by pressing a button

Previous article：Fan controller made by PIC12F508
Next article：PIC12F508 MCU Learning Part 1 - Timer

Popular Resources
Popular amplifiers