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12F675

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rthuey

Member
I was able to program a 12F675 with this;

C:
/*Configuration Bits - not set in code
BG1:BG0 (Bandgap Calibration Bits for BOD and POR voltage)= DEFAULT
FOSC2:FOSC0 (Oscillator selection Bits) = 100
INTOSC oscillator:        I/O function on GP4/OSC2/CLKOUT pin,
                          I/O function on GP5/OSC1/CLKIN
WDTE - Watchdog Timer Enable bit - WDT disabled
PWRTE - Power-up Timer bit - PWRT disabled
MCLRE - GP3/MCLR pin function select - GP3/MCLR pin function is MCLR
BOREN - Brown-out detect Enable bit - BOD disabled
CP - Code Protection bit - Program Memory code protection is disabled
CPD - Data Code Protection bit - Data memory code protection is disabled
*/

// Header Files
#include <xc.h>        //Header file for libpicio (pic_read, pic_write, ...)

#define Sys_tick_counter 8 //Timer1 interrupt count to make a half second flag
#define Button GPIO2
#define Output GPIO5

//Variables
unsigned int Sys_tick=0; //timer1 overflow/interrupt count value
unsigned int Count=0; //timer1 overflow/interrupt count value

// Functions in the program
void Init (void);

//  Function:        Sets up the PIC12F675 I/O ports functionality
void Init (void)
{
    VRCON=0x00;         //Disable voltage reference
    CMCON=0b00000111;         //Disable comparator
    ANSEL=0x00;            //A/D disabled
    GPIO=0;             //Clear GPIO
    TRISIO=0b00011111;        //Set  AND GPIO5 as outputs and GPIO0, GPIO1, GPIO2, GPI03 and GPIO4 as inputs
    WPU=0;             //Disable all weak pull up
    T1CON = 0b00000100;         //Timer1 setup
    PIE1 = 0b0000001;           //Timer1 interrupt enabled
    INTEDG = 1;                 //Interrupt set on rising edge
    INTCON=0b11010000;        //Global Interrupt Enabled and interrupt-on-change Enabled
    TMR1ON=1;                   //Timer1 ON
}

// Interrupt Sub Routine
void interrupt isr(void)
{
    if((INTE==1) && (INTF==1)) //If interrupt-on-change Enable bit and GPIF: interrupt-on-change Flag bit equal 1, interrupt.
    {
        INTF = 0;
        INTE = 0;
        if (Count < 46)
        {
            Count += 5;
        }
//        SLEEP();
//        NOP();
    }

    if((TMR1IE) && (TMR1IF)) //If TMR1 Overflow Interrupt Enable bit and TMR1IF: TMR1 Overflow Interrupt Flag bit equal 1, interrupt.
    { // every 65,5ms
        TMR1IF = 0;
        Sys_tick++;
        if (Sys_tick >= Sys_tick_counter)
        {
            INTE = 1;
            Sys_tick=0;
            if (Count)
            {
                Count--;
            }
            if (Count>=25)
            {
                Output = 1;
            }
            else
            {
                Output = 0;
//                SLEEP();
//                NOP();
            }
        }
//        else
//        {
//            if (Count<25)
//            {
//                SLEEP();
//                NOP();
//            }
//        }
    }
}

// Main Program
void main(void)
{
    Init();        //Initialize
//    SLEEP();        //Powerdown Mode ON
//    NOP();
    while(1)
    {
        NOP();
    }
}

Inserted into this circuit it works as advertised. The SQ-SEN-200 is an omni-directional movement detector.

nfic.jpg





I get a blinking light when ever there is movement.


Can the same program on the same chip be used with this circuit from the manufacturer website?

flexic.jpg


I started with a 4.7m on R1 and a 1m on R2. A 10pf on C1. Not sure where to lead in as High_Z on the chip nor do i know where or how to place the LED.
I tried Pin 5 as the High_Z and putting a 510 resistor off of Pin 4 followed by one lead of the LED. With the other lead of the LED going to ground. I was not able to light the LED this way.
 
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DerStrom8

Super Moderator
Would you mind putting the code in code tags to preserve the spacing? It makes it much easier to follow. Thanks!
 
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