| Electronics > Beginners |
| Bit of a noob, needing project assistance. |
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| starhawk:
It's all together... and... Keyboard controller is whacked. All three LEDs come on and stay on. I sadly recognize this symptom... Of course the chip is proprietary, and eBay doesn't carry keyboard controller PCBs. And, the last time I blew one up, I found out that SolidTek doesn't deal in "small parts" -- they said forget it, buy a new one. I have another one, but it's USB, and although I'm about to check, I'm reasonably sure its PCB is different inside. These keyboards are not internally consistent. Some have a single-protocol PCB, some have a dual-protocol one, and the way the keyboard proper attaches to the controller PCB is sometimes different. Of course I can't replace it for less than $25ish... which I don't have right now |O |
| Ian.M:
Looks like you've screwed the pooch. That's an unfortunate consequence of making a serious wiring mistake (and not catching it before power-up) when hacking stuff together to fit inside a difficult to replace device - yes old PS2 Keyboards are readily available, but finding the exact same one so you can swap controllers and salvage the work you've put in to modding its case is difficult and expensive. An additional consistency issue is likely to be the layout and connections of the keyboard matrix. Even if the the controller board looks identical, if its off a slightly different model, it may have the wrong firmware for the matrix in your keyboard and at best the key mapping will be scrambled and at worst it may damage the controller if a key shorts two scan outputs together instead of connecting a scan output to an input as it normally should. |
| starhawk:
Controller and connectors were different. Swapped both in, after fixing a little 'misfeature' and wiring it up -- keyboard uses jumper leads to select USB or PS/2 or both -- so I had to add the leads for PS/2. Easy peasy. Now it doesn't want to work the SD card. The card is fine -- either I goofed the wiring or the extra volt being put out by my 3.3v regulator is making a difference -- or, which I vaguely remember from the last time I did this, the card absolutely has to be FAT32 formatted. (The one I'm using is so small it can only be FAT16 formatted... why use my 512mb card when I can't even fill up a 16mb one? Yes, megs, not gigs!) |
| Ian.M:
So run a SD card test sketch, e.g. the one at https://www.arduino.cc/en/Tutorial/CardInfo |
| starhawk:
FAT32, strictly. Everything's working except for the keyboard now |O I guess they didn't bother with the PS/2 firmware for the chip on this model, since it's USB. Let me re-check the PS/2 keyboard, and if I can get it working with a USB-to-PS/2 adapter I'll re-solder it in the morning. Some of my worst work was on that keyboard. |
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