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| 15:08.31 | *** topic/#openjtag is this is the place to discuss bootloaders and JTAG |
| 16:02.35 | ali_as | What MCU? |
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| 16:16.20 | atlas | ali_as: h8s/2148b |
| 16:23.31 | ali_as | By connect to JTAG do you mean debug? |
| 16:24.13 | ali_as | Or just read/write flash? |
| 16:24.54 | ali_as | (external flash). |
| 16:34.19 | ali_as | If you have a boundary scan file for the chip urjtag may be of use along with any compatable interface. For debug I don't know, you may be stuck with renasas tools. |
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| 19:09.03 | atlas | ali_as: thank you. i'm primarily interested in reading flash |
| 19:12.57 | atlas | ali_as: what kind of hardware does urjtag require? |
| 19:15.47 | atlas | ali_as: nm. i already have a flyswatter and supported olimex pod |
| 19:16.46 | atlas | now to see if it allows me to play with this mcu |
| 19:26.27 | atlas | ali_as: what makes you suggest urjtag? |
| 19:27.26 | atlas | if the renesas is anything like arm, it requires accessing the mcu through mcu instructions and then reading off results off the data bus. |
| 19:29.26 | atlas | that would require an understanding of the instruction register size, the available scan chains, how to interact with the mcu, and an understanding of the timing of instructions to know when to inject/pull-off the data |
| 19:30.33 | atlas | it looks like a cool tool, but not much different from openocd which i already use. |
| 19:32.35 | atlas | but if you know something about urjtag that would lend itself to this i'm very interested |
| 19:33.34 | ali_as | urjtag is one of the few ones I know that can do boundary scan. |
| 19:35.46 | ali_as | MIPS uses a similar method for debug. SH4 I don't know about, the only Renasas chip I've looked at was SH4 and we didn't use JTAG. |
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