Software reset - What am I doing wrong?

[Christopher4187]

For some reason, I need to reset the 18F4550 every single time whenever it's powered up. I don't understand why, perhaps it's because the 18F is on a demo board, but I've never had to do it before. Anyhow, accessing the reset button is a PITA so I want to use a software reset but nothing works like I want it to. I've tried using the power up timer but it doesn't seem to do anything.

I've also tried:

@ RESET
@ clrf PCLATH
@ goto 0
STKPTR=$FF

Some don't work and some keep the 18F in a continual reset loop. What am I doing wrong?

[mackrackit]

Can you post your code and configs along with what demo board you are using?

[Christopher4187]

I'm using the MCP2515 Demo boards from Microchip. I thought about that being an issue but it can't be because their code doesn't require a reset. If I was able to understand C I'd be able to solve this problem as they provide the source code to you. I'm pretty sure I copied the configs line-for-line from the source code. Anyhow, here it is:

DEFINE OSC 20
' ==============================================================================
'                        CONFIGS
'===============================================================================


@ __CONFIG _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
@ __CONFIG _CONFIG1H, _FOSC_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
@ __CONFIG _CONFIG2L, _PWRT_ON_2L & _BOR_ON_2L & _BORV_3_2L & _VREGEN_ON_2L
@ __CONFIG _CONFIG2H, _WDT_OFF_2H & _WDTPS_32768_2H 
@ __CONFIG _CONFIG3H, _CCP2MX_ON_3H & _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _MCLRE_ON_3H
@ __CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _ICPRT_ON_4L & _XINST_OFF_4L

'==============================================================================
'                 SETTINGS
' ==============================================================================
        
 TRISA   = %00010110: PORTA = %00000000 
 TRISB   = %00010001: PORTB = %00010000   
 TRISC   = %00000000: PORTC = %00000001
 TRISD   = %00011100: PORTD = %00000000
 TRISE   = %00010000: PORTE = %00010111
 ADCON0  = %00111100
 ADCON1  = 15
 ADRESH  = %00000000 
 ADRESL  = %00000000
 CMCON   = 7
 SSPSTAT = %01100100      
 SSPCON1 = %00100001 
 BAUDCON = %00001111

[mackrackit]

I am not sure if this will help or if the CAN module needs it set, but try turning the ICPRT off.
@ __CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _ICPRT_ON_4L & _XINST_OFF_4L

[Christopher4187]

That gives me a code programming error at 0006. Not sure why but I'm trying to figure it out. The issue isn't with the CAN module, I've isolated the problem to the 18F4550.

[mackrackit]

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