| 01:21.48 | *** join/#openjtag wookey (n=wookey@stoneboat.aleph1.co.uk) |
| 01:22.28 | *** join/#openjtag nslu2-log (n=nslu2-lo@limax.nslu2-linux.org) |
| 01:30.02 | *** join/#openjtag purl (i=ibot@pdpc/supporter/active/TimRiker/bot/apt) |
| 01:30.02 | *** topic/#openjtag is this is the place to discuss bootloaders and JTAG |
| 03:08.51 | *** join/#openjtag davygravy (n=davygrav@h75-100-81-36.75-100.unk.tds.net) |
| 03:45.50 | *** join/#openjtag bjdooks (n=ben@89.145.97.151) [NETSPLIT VICTIM] |
| 03:53.15 | *** join/#openjtag jkilb_ (n=jkilb@p5B2085E4.dip0.t-ipconnect.de) |
| 03:55.51 | *** join/#openjtag aproemel (n=aproemel@p57BD12D8.dip0.t-ipconnect.de) |
| 04:19.47 | *** join/#openjtag davygravy (n=davygrav@h75-100-81-36.75-100.unk.tds.net) |
| 06:05.01 | *** join/#openjtag drath_ (i=vmaster@p5B07F722.dip.t-dialin.net) |
| 12:37.07 | *** join/#openjtag nslu2-log_ (n=nslu2-lo@nslu2-linux/dyoung) |
| 12:55.07 | *** join/#openjtag prpplague (n=dave@mail.americanmicrosystems.com) |
| 14:07.32 | prpplague | drath: hey, just out of curiosity, does openocd have strongarm support? |
| 15:05.27 | drath | prpplague: no, strongarms have no debug unit |
| 15:05.45 | drath | prpplague: they have a jtag port, but that's limited to boundary scan |
| 15:28.33 | prpplague | drath: ahh |
| 15:28.53 | prpplague | drath: i knew they had jtag, just didn't know what level of debug was supported |
| 15:39.46 | ali_as | Has anyone scanned the instruction space to see if there is anything hidden? |
| 15:41.29 | bjdooks | the last time we played was with boundary scan a long time agop |
| 15:42.39 | ali_as | Hi ben. What sort of transfer rates should I be getting on the oki module through ethernet? |
| 15:44.01 | ali_as | I'm using wget from an ftp server and I get about 800k/sec with the default bus timings. I can tighten the bus timings and get 860k/sec but now I'm stuck. |
| 15:45.11 | ali_as | (ftp server on local network, tried more than one, wireshake indicates delay is with the oki reply and no obvious protocol problems). |
| 15:52.14 | ali_as | 2-12-7 is the default bus timing, 1-4-3 seems to work fine but with less than a 10% change, suggests that something else is limiting the speed. Both lights are on, and I take this to assume 100Mbit line rate. The dm9000 app notes suggest with the 16bit bus 140Mbit bandwidth is feasable. |
| 16:05.43 | bjdooks | ali_as: speed is also controlled by how fast you can process the data and turn it around |
| 16:06.29 | bjdooks | it sounds like you've hit the cpu limit |
| 16:06.34 | ali_as | I'm wgetting to /dev/null. |
| 16:06.38 | ali_as | Hmm. |
| 16:07.46 | ali_as | Has the thing ever been benched with a data rate over 10Mbit? |
| 16:09.54 | bjdooks | I've not got any figures |
| 16:10.45 | ali_as | No optimisation was done whe you wrote the driver? |
| 16:11.42 | bjdooks | It isn't just the driver, rember you've also got an IP, TCP and a sockets layer in there as well. |
| 16:12.30 | ali_as | Will they move the data round or just bother with the header? |
| 16:13.08 | ali_as | This is a bit of a blow as my design goal is 1M/sec through jtag and in/out of ethernet. |
| 16:13.49 | bjdooks | the IP layer needs to process the packets, do a checksum, then lookup the protocol, pass to TCP which then does another chgecksum, matches it against an open stream, checks to see where the data is within the stream (possibly queueing for more data, etc) |
| 16:14.54 | bjdooks | and then it may be copied to userspace during the read or write calls |
| 16:14.54 | ali_as | Hmm, the dm9000 will do the checksum though? Different checksum? |
| 16:15.05 | bjdooks | no, the dm9000 does an ethernet layer CRC |
| 16:15.34 | ali_as | I'd call crc a checksum but fair enough, ethernet layer. |
| 16:15.50 | bjdooks | CRCs are generally better than checksums |
| 16:17.26 | ali_as | So to even test the speed of the device I need to be writing to the chip directly. |
| 16:17.39 | bjdooks | pretty much |
| 16:18.54 | ali_as | I think I have a new slogan "Embedded linux - your clock cycles at work". |
| 16:20.35 | ali_as | Does uclinux allow an easy way of locking out ethernet activity? |
| 16:20.58 | ali_as | ie, so it won't try to talk to the chip when I am. |
| 16:21.24 | bjdooks | no idea. |
| 16:21.39 | ali_as | Ok, thanks Ben. |
| 16:24.22 | bjdooks | has to go, 2.6.25 patchset to finish up |
| 16:24.44 | ali_as | Later Ben. |
| 17:16.22 | *** join/#openjtag pleemans (n=peter@d51A5E76A.access.telenet.be) |
| 18:07.05 | *** join/#openjtag pleemans (n=peter@d51A5E76A.access.telenet.be) |
| 18:07.05 | *** join/#openjtag drath (i=vmaster@p5B07F722.dip.t-dialin.net) |
| 18:11.08 | *** join/#openjtag drath_ (i=vmaster@p5B07F722.dip.t-dialin.net) |
| 18:14.25 | *** join/#openjtag pleemans (n=peter@d51A5E76A.access.telenet.be) |
| 19:31.57 | *** join/#openjtag prpplague^2 (n=dave@mail.americanmicrosystems.com) |
| 20:35.40 | *** join/#openjtag davygravy (n=davygrav@h75-100-81-36.75-100.unk.tds.net) |
| 20:42.21 | *** join/#openjtag davygravy (n=davygrav@h75-100-81-36.75-100.unk.tds.net) |