Software reset - What am I doing wrong?

[mackrackit]

Is your programmer erasing the device before loading the new code?

[Christopher4187]

That was part of my issue from the very beginning. I've used the 18F4550 for a number of projects and in all of them I used the ICSP. I've never had a problem. With these demo boards the erase always fails. I had to go into options -> more options -> erase -> and uncheck configuration/user ID and calibration. It still erases because when I hit the erase the program is wiped clean but I don't know what these two settings do.

You think this is my issue? I don't understand how the ICPRT setting affects the 18F powering up.

[mackrackit]

I have never had this problem before either and the 4550 or 2550 is what I use the most.

I normally have the MCLRE off and alway have the ICPRT off. The ICPRT is only available on the 44 pin packages and yes I use those too.

I have been reading section 25.9 of the data sheet trying to understand this.

[mackrackit]

Never mind.
I looked at the schematic for the demo board and ICPRT has to be ON.

[Christopher4187]

This is what Microchip uses for the config files. When their program is loaded, the power up sequence works fine so I don't think my issue is in the config file. If I can get the software reset to work correctly I would be golden.

#pragma config PLLDIV   = 5         // (20 MHz crystal on PICDEM FS USB board)
        #pragma config CPUDIV   = OSC1_PLL2   
        #pragma config USBDIV   = 2         // Clock source from 96MHz PLL/2
        #pragma config FOSC     = HSPLL_HS
        #pragma config FCMEN    = OFF
        #pragma config IESO     = OFF 
        #pragma config PWRT     = OFF 
        #pragma config BOR      = OFF
        #pragma config BORV     = 3
        #pragma config VREGEN   = ON      //USB Voltage Regulator
        #pragma config WDT      = OFF
        #pragma config WDTPS    = 32768
        #pragma config MCLRE    = ON
        #pragma config LPT1OSC  = OFF
        #pragma config PBADEN   = OFF
      #pragma config CCP2MX   = ON
        #pragma config STVREN   = ON
        #pragma config LVP      = OFF
        #pragma config ICPRT    = ON       // Dedicated In-Circuit Debug/Programming
        #pragma config XINST    = OFF       // Extended Instruction Set
        #pragma config CP0      = OFF
        #pragma config CP1      = OFF
      #pragma config CP2      = OFF
      #pragma config CP3      = OFF
        #pragma config CPB      = OFF
      #pragma config CPD      = OFF
        #pragma config WRT0     = OFF
        #pragma config WRT1     = OFF
      #pragma config WRT2     = OFF
      #pragma config WRT3     = OFF
        #pragma config WRTB     = OFF       // Boot Block Write Protection
        #pragma config WRTC     = OFF
      #pragma config WRTD     = OFF
        #pragma config EBTR0    = OFF
        #pragma config EBTR1    = OFF
      #pragma config EBTR2    = OFF
      #pragma config EBTR3    = OFF
        #pragma config EBTRB    = OFF

EDIT: My configs do match Microchips, I just changed them today to try and rectify this issue.

[Christopher4187]

I need to clear my head and rethink this. I just turned off the power up timer and it's a little better. Removing the power-up timer no longer shuts down the CAN network but my program still doesn't work. This was a significant issue because if the 18F wasn't reset before the CAN network came on line, my car would be disabled (i.e. no throttle and all warning lights illuminated.)

I must have changed the settings along the way and forgot I did so. Let me do some more investigating as this issue is most likely caused by me. Thanks for turning on that proverbial light bulb in my head.

[Christopher4187]

And the second problem is solved! But, it creates another issue. I use a serial LCD and when I used the HSPLL, I couldn't get the LCD to work correctly. Perhaps someone reading this thread has encountered this before.

I'm using a 20mhz crystal. I use $4054 for the LCD speed. I defined my OSC as 20. If I use the HSPLL setting, what speed do I have to set the LCD at?