Hello everyone,
I'm new here and in the first please excuse my extremly bad english. I'm a native speaken german. (Hi Tim, I see
you're staying here more often as in mikrocontroller.net).
So, why I'm writing the first post ever EEVblog has a simple reason (okay perhaps more reasons): At the first, thanks a lot to all the people who made it possible to handle with the ultra low cost Padauk controllers. I've build a Easy-PDK-Programmer :-) on breadboard and it works great, but due to the facts that a.) the used controller is currently rare and as a consequence of this, he is expensive.
The next thing ist, hobbiest aren't able to build a programmer what is a little bit pitty. So I thought an ATMega can do the job and I thought a lots of people have done such a thing, but terrifyingly I only found to projects to build a programmer that isn't based of the EASY-PDK. One is from socram8888 and I didn't get him to work. Voltage supply is the greatest problem, and the second project is from tim__ , sometimes it does the job and mor sometimes not.
So began to design an own ATmega based programmer for Padauk and I have done something like the Easy-Programmer with the voltages: An (old) switching regulator MC34063 works as a step-up converter und like Easy-Programmer I'll have an OP-Amp LM356 to generate the V_pp and V_dd. So, at the moment I can reliable flash a PFS154 Chip, but I can ONLY flash this type.
But... I want to flash a PFS173 too, and the second challenge begin. At the moment I can do :
- reading the device-ID (0EA2)
- erasing the device
- reading a word from the flash
But I cant write anything. After a write access not only one bit is writen. So I know, something with the protocol went wrong or something with the voltages (I use 8V for writing, 9V for erasing), or both went wrong.
So I'm slowly running out of ideas.
Has anywhere a documentation and / or oscillographs from the programming algorithm for PFS173 (like the analysis document on Tim's github
https://github.com/cpldcpu/SimPad/blob/master/Protocol/PDKprogrammingsequence20v0.5.pdf )
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So thanks a lot for reading ... and excuse the horrible english.
JJ / Ralph S.
Perhaps you want to have a look at my github ?
https://github.com/jjflash65/Padauk-pfs154