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| 05:14.15 | johnrw | blogic ping |
| 05:14.54 | johnrw | you might want to talk to noz before ordering one. |
| 05:19.05 | johnrw | Hmm, Dec 04... and still no answer... http://forum.embedded-projects.net/viewtopic.php?pid=3139 |
| 05:21.05 | johnrw | From what I gather... Benedikt has a USB ARM debugger here on this page... but it's a ftdi based device... http://www.embedded-projects.net/index.php?page_id=256 |
| 05:23.18 | johnrw | but the usbprog device... noz got... here... http://www.embedded-projects.net/index.php?page_id=165 is not really ready for serious debugging. Noz hasn't been able to get it working on a XScale board. |
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| 08:45.49 | noz | blogic: That's true, I haven't got the USBprog working with openocd. I think it's a problem in the adapter specific code in openocd, rather than a problem with the USBprog itsefl |
| 08:45.53 | noz | *itself |
| 08:47.05 | noz | urjtag doesn't have support for the USBprog, but there is tentative openwince (precursor to urjtag) support, so a port is not impossible |
| 08:47.50 | noz | So, by all means go ahead and buy one, but it'll be a work-in-progress (but I'll have someone to talk to about it!) |
| 10:53.19 | blogic | noz: so which dongle works ? |
| 10:57.21 | blogic | ah i get it |
| 10:58.53 | blogic | so, how likley is it to get mips debugging if i have a ftdi based dongle |
| 10:58.55 | blogic | ? |
| 10:59.00 | blogic | or is that lso WIP ? |
| 11:06.12 | roxfan | afaik urjtag uses boundary scan to do the flashing, while openocd tries to use xscale's jtag debug |
| 11:06.30 | roxfan | and the latter requires separate srst and trst signals |
| 11:07.25 | roxfan | does usbprog provide that? |
| 11:16.07 | blogic | no idea |
| 11:16.14 | blogic | i will have to look into it in detail |
| 11:16.40 | blogic | wisches the bdi was cheaper :) |
| 11:17.19 | roxfan | well, that was to johnrw i guess |
| 11:17.29 | roxfan | i don't think it applies to mips |
| 11:18.58 | blogic | ah sorry |
| 11:20.02 | blogic | so, how slow are the usbprog and the ftdi dongle ? |
| 11:20.18 | blogic | i mena, what clock speed can you get on the jtag ? |
| 11:22.27 | roxfan | not too great with ftdi |
| 11:23.40 | blogic | ok |
| 11:23.47 | blogic | still, better than buying a bdi |
| 11:24.01 | blogic | i normally only need it to get the kernel to a point where serial works |
| 11:24.09 | blogic | after that the rest is a piece of cake |
| 11:24.35 | blogic | and i recently found out that without jtag it takes days to weeks and with a bdi you need 1 night |
| 11:24.57 | blogic | so if it ia slow jtag, well then it takes 2 night, which is still better than weeks |
| 11:25.07 | blogic | but i am not telling you anything new i guess ;) |
| 11:25.38 | roxfan | days to weeks? o.o |
| 11:26.03 | blogic | hmm |
| 11:26.13 | blogic | i did the infineon danube last year |
| 11:26.36 | blogic | there was a really crappy 2.4 kernel as a reference and we rewrot the whole code for 2.6.25 |
| 11:26.48 | blogic | took 2 weeks to get serial going |
| 11:26.52 | blogic | 4 weeks for mtd |
| 11:26.59 | blogic | and ... 8 months for pci :) |
| 11:27.11 | roxfan | so how did you work without jtag? |
| 11:27.25 | blogic | ermm |
| 11:27.32 | blogic | readying the code and datasheet |
| 11:27.46 | blogic | and nbd helped me |
| 11:27.53 | blogic | he is kinda a wizard |
| 11:28.16 | blogic | but 2 weeks ago, we were working on the new ralink wisocs |
| 11:28.25 | roxfan | so let me guess... you flashed code directly to the chip and tried to run it blind? |
| 11:28.28 | blogic | and it was a piece of cake as we had a bdi |
| 11:28.36 | blogic | roxfan: yeah :) |
| 11:28.40 | roxfan | ouch |
| 11:28.43 | blogic | until serial worked |
| 11:29.08 | blogic | and then merged that as a hack into the kernel a EARLY_PRINTK |
| 11:29.17 | blogic | the pci was more tricky though |
| 11:29.54 | blogic | the infineon has a EBU that endianess swaps only 1 way under certain conditions. so the code needed a lot of work arounding to detect and handle that |
| 11:30.02 | blogic | its an amazingly shitty design |
| 11:30.59 | blogic | hacking kernel arch support is great fun |
| 11:31.00 | blogic | ) |
| 11:31.57 | blogic | and by looking at the nicks in the channel i guess i am not the only one here that thinks so |
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| 15:05.28 | johnrw | last night, at the last, I finally got a combination that was able able to set a hard break in the kernel. I have an Olimex, OpenOCD(svn pulled less than 12 hours ago) and used the OpenWrt generated gdb. |
| 15:05.53 | johnrw | Olimex-Arm-USB |
| 15:09.28 | blogic | johnrw: what baord ? |
| 15:11.04 | johnrw | On that USR8200 with a ixp425 chip(rare but they do exist, but it has the A0 stepping) |
| 15:11.35 | blogic | that was the one with firewire on it ? |
| 15:11.44 | johnrw | Yes |
| 15:12.11 | roxfan | olimex has separate trst and srst |
| 15:12.29 | johnrw | That's how I set it up. |
| 15:12.33 | roxfan | so openocd can enter dbg mode on xscale |
| 15:13.36 | johnrw | I had always been able to set a hardware breakpoint in OpenOcd... just couldn't get gdb to work with OpenOCD... |
| 15:16.15 | johnrw | I had tried the "newer" svn openocd... but since it was such a work in progress... there was a lot of challenge in configuring it... because the docs were talking about the old openocd. They have changed it, alot. |
| 15:17.25 | johnrw | But I gave it another try last night... and it worked out of the make... using the ftd2xx library. |
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| 16:22.22 | johnrw | blogic: I have a few of these usr8200's... and when I setup openocd, the settings that work on 1 board... don't work on another. Ie. On 1 board... I can use jtag speed 0(full speed), but on another board, i couldn't use full speed... so I clocked it down to jtag speed 16 in openocd.cfg |
| 16:23.38 | johnrw | The one that works at full speed is a ixp422 B0 stepping. The A0 ixp425 is the one that needs the 16 divisor. |
| 16:24.29 | johnrw | I know your looking for mips... but I am just showing how none of this is an exact science... |
| 16:25.01 | johnrw | unless of course, conservative timings are used, I guess. |
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