Problema cu PIC12F683

[lama]

Salut.

M-am apucat de un pic12f683 si cum era de asteptat ca exemplu am  un blinker(ca test).

Problema ca , codul de mai jos merge cand i-a alimentarea din clona de PicKit2. Cand alimentez extern(de la 12V) extern ledul sta tot timpul aprins.

Vre-o idee ce gresesc?

 

 

 

PS: cu alimentare externa am pus MCLR la + si a inceput sa functioneze. Nu mai pricep ...

/*************************************************************************                                                                       **   Processor:     12F683                                               **                                                                       **   Pin assignments:                                                    **   GP0 - ISCPDATA														**   GP1 - buton															**   GP2 - PWM															**   GP3 - MCLR															**   GP4 - Test Led		       	                                        **   GP5 - Touch	with GP1 as load	       								*							       	                                        		*************************************************************************/#include <htc.h>/***** CONFIGURATION *****/__CONFIG(	FCMEN_OFF &  // Fail Clock Monitor Enable 	IESO_OFF &  // Internal External Switch Over 	BOREN_OFF &  // Brown-out detect modes 	CP_OFF &  // Protection of data block 	CPD_OFF &  // Protection of program code 	MCLRE_OFF &  // Master clear reset	PWRTE_OFF &  // Power up timer enable 	WDTE_OFF &  // Watchdog timer enable 	FOSC_INTOSCIO  // Oscillator configurations: internal); // Define oscillator frequency#define _XTAL_FREQ 8000000void main(void){	OSCCON = 0b01110001;	// 8Mhz INT OSC		// Set up the PIC12F683 IO pins	TRISIO = 0b00000000;	// Set all IO pins to output	ANSEL  = 0b00000000;	// Disable analogue inputs	//ADCON0=	GPIO   = 0b00000000;	// Set all pins to zero	OPTION_REG = 0b00000000;	// Set the option register (page 12 of DS)	WPU    = 0b00000000;	// Set weak pull-up off on all pins	CMCON0 = 7;		// Disable Comparator on 12F683	while(1)	{		GP4=1; __delay_ms(1000); GP4=0;__delay_ms(1000);	}}

Editat Martie 19, 2015 de lama

[costi002]

Mclr, daca este activ, trebuie pus intotdeauna la Vcc prin 10k

[lama]

Mclr, daca este activ, trebuie pus intotdeauna la Vcc prin 10k

PAi nu pare valabil la acest chip. Cel putin asa am dedus eu din datasheet. La 675, 629 asa este dar la acesta pare ca nu.

Si daca va uitati pe schema asa am si pus, la Vcc prin 10k.

Editat Martie 19, 2015 de lama

[Mircea]

Daca LED-ul e pus si in montaj dupa cum e pus pe schema sigur altundeva e defectul.