How to see if CORE works with midibox16E Firmware

Nat · August 27, 2003, 2:54am

Is there an easy way to test the core with the Midibox16E firmware running on a PIC16F877A ?

Is it possible to test the core with a del ?

I have tried the Test_TX firmware and had no luck so I’d like to try the real firmware.

Thanks

nat

Nat · August 27, 2003, 3:04am

I was also wondering, is this power supply correct ?

INPUT : 120VAC 60Hz 15 watts

Output : 13VAC 700mA

I’ve been trying to make my core work for a month and i’m getting pretty desperated…

Steven_C · August 27, 2003, 5:38am

If this power supply is for the core (?) then it should be fine, as long as you have installed the bridge rectifier.

What is a del?

Have you read the recent posts on solutions to programming the pic16877A?

If you still have problems, then I can program the firmware for you. I have a spare pic16f877, so I can program it, post it to you, and you can swap me your pic16f877A (saves time, you sending to me and then back again ;))

Nat · August 27, 2003, 6:34am

Oups A del is a LED in french Got mixed up

Thanks for the offer, i’ll troubleshoot some more but if nothing works i’ll send you a pic with the Encoder package.

The strange thing is that the programmation goes fine. It verifies ok. I can then remove the PIC and put it back again, do a read all and the program code is intact…

This gives me the impression the PIC is programmed correctly… The crystal is good also, 20.000 Mhz with 18 pf capacitance, parrallel… I really have no clue

Ian_Hurlock · August 27, 2003, 1:59pm

Hi Nat

Should the capacitors for the xtal 18pf ???

I think the 877 oscillator will not function with this value.

I think they are 33pf each.

Regards

Ian

Nat · August 27, 2003, 4:53pm

The Crystal has a 18pf load capacitance, the capacitors next to the crystal are 33pf…

Ian_Hurlock · August 28, 2003, 2:20pm

Sorry Nat

Read that wrong :-/

Ian

Nat · August 28, 2003, 11:16pm

Np

So anyone can tell if the 16E firmaware sends stuff at startup ?

Thanks

Nat

T.K · August 30, 2003, 7:53pm

You could manually trigger MIDI events by using a cable, connected to ground, and tapping it to the DIN chain input. However, if the Tx firmware doesn’t work, the MB16E won’t work, too -> Hardware issue

Best Regards, Thorsten.

Nat · August 30, 2003, 9:36pm

Thanks, I will have to make sure the PIC is working properly.