testing of the CORE module for SID use...

Testing/Troubleshooting
1

i have just terminated my CORE module for my SID project.

i will do the test in the following days, because i lack the connector for the power supply,. so there is time for some questions! :slight_smile:

  1. is there any kind of test i can do (apart the voltage control) in order to be sure that the core works, after PIC programming and PC MIDI connection? (some sort of sysex/MIDI communication with MIDI-OX for example…)

  2. i have used a TL05 voltage regulator without heatsink… is it safe??

  3. i will not mount the LCD screen. will i have to connect the two trimmers P1 and P2? should i connect a resistor or leave the contacts open??

  4. all the connectors not used in the SID configurations should be leaved open, right? :slight_smile:

  5. i have a power supply at 16V 800-900mA (don’t remember…) is it OK for powering both module??

thank you very much!!

matteo

2

Hi Matteo,

  1. is there any kind of test i can do (apart the voltage control) in order to be sure that the core works, after PIC programming and PC MIDI connection? (some sort of sysex/MIDI communication with MIDI-OX for example…)

yes, you could send a “ping” command to the core: f0 00 00 7E 46 00 0F F7

The same string should be returned.

  1. i have used a TL05 voltage regulator without heatsink… is it safe??

Yes, because the power consumption is very low.

  1. i will not mount the LCD screen. will i have to connect the two trimmers P1 and P2? should i connect a resistor or leave the contacts open??

In this case P1 and P2 are not required

  1. all the connectors not used in the SID configurations should be leaved open, right? :slight_smile:

yep :slight_smile:

  1. i have a power supply at 16V 800-900mA (don’t remember…) is it OK for powering both module??

yes, perfect. You could also use a PSU with 200 mA

Best Regards, Thorsten.

3

how can i send a ping to the core? with midiox?

4

yep

5

but how   ???

:-/

6

Open MIDI-OX , open the SysEx window and send this command:

f0 00 00 7E 46 00 0F F7

7

I have just finished building my MIDI core (based on the PIC 16F877) and all was working fine, then after a while, things stopped working.

I re-sent the SYS-EX file, and unlike before, no return on information.

I tried re-programming the chip, but again no joy.

After reading the above message i tried to ‘ping’ my core, but nothing came back.

Have i blown something, could anyone suggest what, and how i might find out?

Many Thanks

Michael

8

have you checked all connections, voltage on the supply pin of the chip etc?

9

I’ve tested all the voltages and they seem fine.

I’ve tried the test programs on my chip, and the test_txrx one which should just pass MIDI information through does pass information through, but its generally nothing like what i sent in.

It seems very strange because like i said everything was working, i just left it for half an hour and when i came back things didn’t seem to respond.

Thanks

Michael