|
|
Post by gareth on Feb 13, 2015 4:50:18 GMT
In the component List for the Function Decoder it is said that either the 629 or the 675 can be used.
Does this also apply to the motor decoder?
Gareth |
|
Trond
Keen DIYer
Posts: 18 
|
Post by Trond on Feb 14, 2015 13:45:50 GMT
I think the only difference between the 629 and 675 is that the 675 has an AD converter.
|
|
|
|
Post by Paul Harman on Feb 17, 2015 19:12:23 GMT
Yes, the difference is just the A-D convertor which is on the 12F675 but not on the 12F629. Unfortunately Microchip decided to enable the A-D by default so unless the 12F629 code has specified instructions to switch off the analogue you can come unstuck. Since the motor decoder just uses code originally intended for the 12F629 with minimal modification there is no guarantee that it will work on the 12F675, I have tried it and it does work, but if it leaves the analogue inputs enabled (which I think it does) there might be high power consumption in the PIC and some strange things might happen. For a motor decoder it is best to use a 12F629. All the other decoder firmware has code to disable the analogue inputs so will be fine in either processor.
|
|
|
|
Post by gareth on Feb 19, 2015 16:01:19 GMT
The 12F629 seems to be a millstone around my neck. I have had countless problems when trying to use it. I have a QL200 Dev board and a PICKit2 (ver 2.6) and they both claim to protect the Occtal code but I have not had much success with it. I have made a simple veroboard project for a torch (Peter (Pelnet.co.uk) to prove to myself that the 12f629 is ok.
I have tried several times to build one of your decoders also those from Pacos site without success and yet I have no troubles with 12F675 projects hence my query.
|
|
suzie
Keen DIYer
Posts: 30
|
Post by suzie on Feb 20, 2015 18:38:22 GMT
Why not try putting the function decoder in a 12F675 and see if that works (PICkit2 will program it fine), then try the same code in a 12F629 which should behave exactly the same. Once you have shown that the '629 is OK you can try the motor decoder code in the '629. I am sure that the 12F629 is not haunted!
|
|
|
|
Post by gareth on Feb 26, 2015 17:09:07 GMT
I've just ordered a new batch of 675's and 629's from overseas (much cheaper than here-South Africa). When they arrive I'll start again.
|
|
