Software reset - What am I doing wrong?

[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?

[mackrackit]

I did not notice that...
With the configs posted use
DEFINE OSC 48

[Christopher4187]

No dice. I tried using all of the prescalers from 4 to 48 but none work. By using the Define OSC 48, my program will not work. Any other adjustments you can think of?

[Christopher4187]

I just ran a loop increasing the communication speed of the LCD by 1 and then displaying the speed. When I was able to read the information on the LCD, that is the speed to use. It looks like something from $40E2 to $40F6 works. I need to do a little more testing to find out if there any differences in that range. I'm not sure if this the right way to go about solving this problem but it works......for now.