FrançaisMicrochip 12F683
25 Jun 2012 Comments Off on Microchip 12F683
dans Uncategorized Tags: blinking, code source, microchip, microcontroleur, PIC12F, PIC12F683
This is a sample code showing a minimal configuration of a PIC12F683 to get on GPIO2 a high level (logical 1) of a duration of one cycle of 500ns (8MHz = 2MIPS on 8bits architecture). The aim is to validate a simple design by verifying :
- The MPU is well powered,
- Its main oscillator is working.
To do that, one file have to be added to a blank project in MPLABX using Hi-Tech PICC compilers :
#include <htc.h>
/////////// Configuration Bits : Read datasheet page 84, 12.1 Configuration bits //////////////
__CONFIG(FCMEN_OFF \
& IESO_OFF \
& BOREN_OFF \
& CPD_OFF \
& CP_OFF \
& MCLRE_ON \
& PWRTE_ON \
& WDTE_OFF \
& FOSC_INTOSCIO);
void main(void) {
//// Internal oscillator configuration (datasheet page 20, 3.2 Oscillator control) //////////
OSCCONbits.IRCF = 0b111; // 8Mhz
OSCCONbits.SCS = 0; // System clock configuration is defined by configuration bits
///// Configuration of digital IO ///////////////////////////////////////////////////////////
ANSELbits.ANS2 = 0; // GPIO2 is digital
TRISIObits.TRISIO2 = 0; // GPIO2 is an output
while(1) {
GPIObits.GP2 = 1;
GPIObits.GP2 = 0;
}
}