Main board 18F14K50 USB Firmware

[bitfogav]

Ive just added a New Article USB Interface Firmware Code is ported using Swordfish. I Hope that someone will find it useful.

[ljohnway]

The ZIP file I downloaded (several times) appears corrupt. Please could you re-post?
Thanks.

[David John Barker]

The file has been uploaded - please try again...

[Jerry Messina]

I noticed a couple of issues with the code while using it.

First, it looks like the led events are backwards. The events turn off different leds than the code turns on.
Change:

Code: Select all

' OnTimer1 event...
Event OnTimer1()
   Timer.Items(0).Interval = ledOnTime
   Low(txLED)
End Event

' OnTimer2 event...
Event OnTimer2()
   Timer.Items(1).Interval = ledOnTime
   Low(rxLED)
End Event


To:

Code: Select all

' OnTimer1 event... (CDC.DataAvailable)
Event OnTimer1()
   Timer.Items(0).Interval = ledOnTime
   Low(rxLED)      ' was txLED
End Event

' OnTimer2 event... (USART.DataAvailable)
Event OnTimer2()
   Timer.Items(1).Interval = ledOnTime
   Low(txLED)      ' was rxLED
End Event


I was also having a problem getting a consistent 100ms pulse out of the RESET line... I measured anywhere from 2ms-88ms in 10 tries.
I had a lot better luck with the following
Change:

Code: Select all

' ISRTimer module - used for blinky LEDs...
#option TIMER_AVAILABLE = 3
Include "ISRTimer.bas"


To:

Code: Select all

' ISRTimer module - used for blinky LEDs...
#option TIMER_AVAILABLE = 3
' added to ensure proper timing
#option TIMER_AUTO_RELOAD = FALSE
Include "ISRTimer.bas"


[David John Barker]

Thanks for that Jerry, I've amended the wiki entries...

[bitfogav]

Thank you Jerry, I've updated the zip file on the wiki.

[Jerry Messina]

And now it's my turn.

See http://www.sfcompiler.co.uk/forum/viewtopic.php?t=1784 for a number of important bug fixes to the SF USB v142 lib