I'm trying to program a PIC18F67J60 with a PicKit 2 but the device won't program.
The output from MPLABX PicKit 2 log is:
Found PICkit 2 - Operating System Version 2.32.0
Target power not detected - Powering from PICkit 2 3.25
2014-01-03 11:35:52
PIC18F67J60 found (rev = 0x3)
Erasing Target
Programming Program Memory (0x0 - 0x3f)
Programming Program Memory (0x1ff80 - 0x1fff7)
Verifying Program Memory (0x0 - 0x3f)
Verifying Program Memory (0x1ff80 - 0x1fff7)
Programming Configuration Memory
Verifying Configuration Memory
PK2Error0027: Failed verify (Address = 0x1fff9 - Expected Value 0xf4 - Value Read 0x0)
PK2Error0027: Failed verify (Address = 0x1fff9 - Expected Value 0xf4 - Value Read 0x0)
The code is basically just blink an LED:
#include <xc.h>
#include <stdio.h>
#include <stdlib.h>
//general defines
#define _XTAL_FREQ 25000000
// CONFIG1L
#pragma config WDT = OFF // Watchdog Timer Enable bit (WDT disabled (control is placed on SWDTEN bit))
#pragma config STVR = OFF // Stack Overflow/Underflow Reset Enable bit (Reset on stack overflow/underflow disabled)
#pragma config XINST = OFF // Extended Instruction Set Enable bit (Instruction set extension and Indexed Addressing mode disabled (Legacy mode))
// CONFIG1H
#pragma config CP0 = OFF // Code Protection bit (Program memory is not code-protected)
// CONFIG2L
#pragma config FOSC = HS // Oscillator Selection bits (HS oscillator)
#pragma config FOSC2 = OFF // Default/Reset System Clock Select bit (INTRC enabled as system clock when OSCCON<1:0> = 00)
#pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor enabled)
#pragma config IESO = OFF // Two-Speed Start-up (Internal/External Oscillator Switchover) Control bit (Two-Speed Start-up disabled)
// CONFIG2H
#pragma config WDTPS = 32768 // Watchdog Timer Postscaler Select bits (1:32768)
// CONFIG3L
// CONFIG3H
#pragma config ETHLED = OFF // Ethernet LED Enable bit (RA0/RA1 function as I/O regardless of Ethernet module status)
/*
*
*/
int main(int argc, char** argv) {
//OSCCONbits.SCS = 0b10;
TRISB = 0x00;
while(1){
LATBbits.LATB0 = 1;
for(unsigned char i = 0; i < 25; i++)
__delay_ms(10);
LATBbits.LATB0 = 0;
for(unsigned char i = 0; i < 25; i++)
__delay_ms(10);
}
return (EXIT_SUCCESS);
}
Using PK2CMD I can see that the device is recognised with the auto detect however when I try to flash the HEX straight into the PIC I get this terminal output:
> pk2cmd -PPIC18F67J60 -M -F main.hex
PICkit 2 Program Report
3-1-2014, 11:34:51
Device Type: PIC18F67J60
Program Memory Errors
Address Good Bad
01FFFE 00FFFF 00F000
Which seems a different problem to the MPLABX output. Could this just be a bad chip (unlikely?) - any suggestions would be great.
UPDATE:
Schematic below:
Vcc is 3.3V so ENVREG is ties high to use the built in regulator to reg down to the 2.5V the chip actually uses, as a result the VDDCORE/VCAP is tied to ground with a 10uF electrolytic. X1 is 25MHz and I have tried the Pickit 2 MCLR straight into the pin, as it is here and also without the 0.1uF cap (as the datasheet suggests)
UPDATE 2:
I tried erasing the device with the following using PK2CMD
> ./pk2cmd -PPIC18F67J60 -E
Erasing Device...
Operation Succeeded
but sadly I still get the same error when trying to program - is there an alternative way to erase or is CP being set permanent on these chips?
UPDATE 3:
Interestingly if I unplug the PicKit 2 and run the circuit on external power only the LED is on - not pulsing, just on. Not sure if that is of interest but it's something.
And the device checksum in the project view in MPLAB for the device is Checksum: 0xC0C2
