| --- Mon Aug 20 2012 | 00:00 | |
| kristianpaul | http://www.reddit.com/r/IAmA/comments/ybmmh/we_are_engineers_and_scientists_on_the_mars/c5u4y7c?context=3 | 14:06 |
|---|---|---|
| xiangfu | can I read the 'reg' variable out by using jtag, or what should I do that I can keep a value for jtag reading? | 14:11 |
| xiangfu | kristianpaul, ^ | 14:11 |
| kristianpaul | hmm | 14:12 |
| kristianpaul | i would read it by a tx-only serial port, to be honest i havent use much jtag besides programing the rom.. | 14:13 |
| xiangfu | ok. | 14:14 |
| kristianpaul | or you can shift it and stream it by a pin? lol wich is mostly same serial port but at a faster rate of course | 14:15 |
| kristianpaul | ah, http://www.xess.com/appnotes/FpgasNowWhatBook.pdf page 74 | 14:17 |
| kristianpaul | xiangfu:^^ | 14:17 |
| xiangfu | downloading.. | 14:17 |
| xiangfu | thanks kristianpaul | 14:17 |
| kristianpaul | but it seems receive aid form another firmware... | 14:18 |
| kristianpaul | xiangfu: can you bit drive individually both TDI and TDP from jtag? | 14:23 |
| kristianpaul | i explain, use it as general porpuse I/O ? | 14:23 |
| xiangfu | kristianpaul, you mean the fpga chip pins(TDI / TDO). | 14:27 |
| xiangfu | but it's 'dedicate pins' which can only used as jtag stuff. | 14:27 |
| kristianpaul | hmm | 14:27 |
| kristianpaul | no i mean on the jtag serial/port.. | 14:28 |
| xiangfu | kristianpaul, I think we can. | 14:39 |
| --- Tue Aug 21 2012 | 00:00 | |
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