Applying a Prop to do JTAG reading and possibly writing
Buck Rogers
Posts: 2,161
in Propeller 1
Hello!
I have here a batch of sketches for the Uno and its friends for managing JTAG chains, as they apply to the boot stuff found on routers. Oddly enough they do detect and support within reason the basic JTAG chain, two of TI SCOPE octal buffer/driver parts.
And while I do know that what we use for managing the basic pixels such as the NeoPixel from Adafruit was ported from software they wrote for the Uno, I do not know if anyone has written something for the Prop.
So in the spirit of proving that if works on an Uno and on the Pi as it happens I want to see if it can be done using the Prop 1 design. Incidentally this would be hosted on a Pi who is also actively managing a cluster of One-Wire devices.
--
Gregg
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And this message is being sponsored by the league of voters for a better world for Elephants.
I have here a batch of sketches for the Uno and its friends for managing JTAG chains, as they apply to the boot stuff found on routers. Oddly enough they do detect and support within reason the basic JTAG chain, two of TI SCOPE octal buffer/driver parts.
And while I do know that what we use for managing the basic pixels such as the NeoPixel from Adafruit was ported from software they wrote for the Uno, I do not know if anyone has written something for the Prop.
So in the spirit of proving that if works on an Uno and on the Pi as it happens I want to see if it can be done using the Prop 1 design. Incidentally this would be hosted on a Pi who is also actively managing a cluster of One-Wire devices.
--
Gregg
---
And this message is being sponsored by the league of voters for a better world for Elephants.
Comments
https://www.parallax.com/product/32115
And they provide some code...
https://github.com/grandideastudio/jtagulator
I could have missed it but the only code I saw was for DETECTION of the bus. I hope I'm wrong because I'd really rather not do it myself. I've been planning on writing some code to program cplds from a SVF file stored on SD card. Shouldn't be too hard to do. I've just been stuck on figuring out my hardware design because the SD card chip select is controlled by the CPLD.
But yeah, totally doable
Huh?
I looked at his gadget shortly after it came out. Basically it does do what I want, but it is too complicated. This is one time when I need a simple solution. I can do it on the Pi via an Arduino, but I would rather do it with a Prop.