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| Sniffing the Rigol's internal I2C bus |
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| rmd79:
Thanks for the info sptm14, I opened my MSO1074Z-S today to see what the situation was regarding possible candidates for JTAG headers. I have a 6-pin header and two 10-pin headers on the board. My guess based on the PCB traces is that the 10-pin header nearest to the Hynix ram is probably the JTAG header, and my hope is that this header follows the usual 10-pin ARM JTAG pinout (I haven't poked around at it yet) Are you able to confirm if my assumptions are correct? I've attached a photo from inside my scope for reference. |
| sptm14a:
--- Quote from: rmd79 on September 03, 2014, 08:08:59 am --- Are you able to confirm if my assumptions are correct? --- End quote --- Yes, the 10-pin header next to the hynix dram chip is the JTAG you need (there are several jtag interfaces on the board). Pinout is not standard ARM, here it is, left to right as shown on your picture: top row: tck,tms,tdi,trst,3.3v bottom row: XXX,tdo,srst,gnd,gnd |
| rmd79:
--- Quote from: sptm14a on September 03, 2014, 07:42:46 pm ---top row: tck,tms,tdi,trst,3.3v bottom row: XXX,tdo,srst,gnd,gnd --- End quote --- Thanks for this, really appreciated. I've got some JTAG adaptors on the way so hopefully I'll be able to play with this really soon :) |
| rmd79:
--- Quote from: rmd79 on September 04, 2014, 01:02:28 am ---Thanks for this, really appreciated. I've got some JTAG adaptors on the way so hopefully I'll be able to play with this really soon :) --- End quote --- Well I tried the first JTAG adaptor without success (but also no smoke, so thats always nice). I bought a cheap ST-Link v2 JTAG/SWD dongle, but no luck with that so far. I'm completely new to JTAG, so I'm not really sure what I'm doing. I tried to get OpenOCD v0.8.0 working with the ST-Link adaptor connected to the scope. I made a short cable to convert the standard 20-pin ARM connector to the 10 pin one in the scope, but all I've been able to get OpenOCD to do so far is reset the scope when it tries to connect. I played around with the reset_config options a little but still had the same results. OpenOCD can detect the ~3.3v from the scope, so the dongle appears to at least partially work. I've got an Olimex ARM-USB-OCD-H adaptor on its way, so maybe I'll have better luck with that. The more I've been reading to try to solve the various problems I've run into so far, the more its becoming clear that the ST-Link adaptors are a little bit "special" (not in a good way). |
| radiogeek97:
About to pull trigger on a dsa815tg, prob from tequipment, BUT I saw a post by "pinkman" in this thread that made refrence to a new boot loader/ firmware that may have locked out the "upgrade process" to turn on options. Is this true ? ????. If so could an owner downgrade the FW and then "activate the options" Any advice would as always be welcomed |
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