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| 15:11.53 | mattylad | Hi all. I came here from the openjtag wiki. Was wondering if there were any schematics for a FTDI 2232C based JTAG dongle? |
| 15:12.20 | mattylad | (I've seen the block diagram in CVS) |
| 15:12.21 | kay2 | mattylad: on ftdi's webpage |
| 15:12.37 | kay2 | look at the jtag session |
| 15:12.46 | kay2 | but this shit can't bitbang anyways |
| 15:12.51 | wookey_ | guys - I haven't been around for a while - what's the status of the JTAG dongle design, software etc? |
| 15:12.53 | kay2 | so not worth anything |
| 15:13.06 | kay2 | wookey_: not much |
| 15:13.11 | wookey_ | Balloon 3 is about to get first production run |
| 15:13.21 | kay2 | wookey_: AchiestDragon making he geeps hoping that it would be THE jtag tool |
| 15:13.45 | wookey_ | and we need some of what you've been doing - we are happy to combine forces if it makes sense/helps |
| 15:14.00 | wookey_ | e.g use your dongle design to save us doing one |
| 15:14.16 | wookey_ | The guy who knows about this stuff is Dave Bisset |
| 15:15.08 | wookey_ | Anyone interested should look at the JTAG section on http://balloonboard.org/docs/Developers_Meeting_20060606.pdf |
| 15:15.21 | wookey_ | to see where we are at. |
| 15:15.51 | wookey_ | Dave has done yet another JTAG programming tool called bflash |
| 15:16.18 | wookey_ | He said the open stuff he looked at didn't do multiple chains to his satisfaction so he did his own :-( |
| 15:16.29 | wookey_ | but now we need a free version of XJTAG |
| 15:17.09 | wookey_ | g2 was interested in this stuff - I see he's not around right now |
| 15:19.08 | mattylad | kay2; I've seen the USB to JTAG interaface on ftdi's webpage. Is that the one you mean? |
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| 15:31.47 | p2-mate | wookey_: it works for arm7 and some arm9s |
| 15:31.55 | p2-mate | wookey_: xscale is being worked on |
| 15:32.26 | wookey_ | p2-mate: (hi) OK, cool. It needs software work or hardware work? |
| 15:32.30 | p2-mate | wookey_: software work |
| 15:32.46 | wookey_ | Is anyone making devices or pcbs so we can just get one? |
| 15:33.14 | p2-mate | wookey_: the FTDI 2232C eval board should do |
| 15:39.42 | p2-mate | you can't go beyond 12 (or was it 16) Mhz anyway |
| 15:39.55 | kay2 | p2-mate: on jtag ? |
| 15:39.56 | p2-mate | and on some boards you can't reach that anyway |
| 15:39.58 | p2-mate | kay2: yes |
| 15:40.13 | kay2 | With a MIPS i have no problem going over 70Mhz |
| 15:40.16 | kay2 | bitbanging |
| 15:40.22 | kay2 | what u talkin about |
| 15:40.25 | kay2 | EJTAG.. |
| 15:41.04 | p2-mate | the CPU can generate it, the JTAG controller on ARM can't cope with it |
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| 15:47.38 | kay2 | on MIPS it works |
| 15:47.43 | kay2 | dunno about arm tho |
| 16:11.36 | vmaster | imho you don't need >10 mhz |
| 16:11.54 | vmaster | at ~1.5mhz i can download >100kb to a ARM7/9 target |
| 16:12.44 | vmaster | well, probably only for boundary-scanning |
| 16:13.39 | vmaster | because of the overly long scan chains |
| 16:14.12 | vmaster | but XScale, ARM7/9, MIPS, all have shorter scan chains specifically for debugging and flashing |
| 16:49.27 | p2-mate | is there a free EJTAG implementation BTW ? |
| 16:52.22 | vmaster | mhh, not that I know of |
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| 17:43.13 | vmaster | wookey: regarding the FT2232: currently there's |
| 17:43.28 | vmaster | only the eval board or the Amontec JTAGkey (~120 euros) |
| 17:43.43 | vmaster | but olimex is about to release a similar device at ~60 euros |
| 18:43.13 | prpplague | vmaster: oh yea? |
| 18:43.24 | prpplague | vmaster: i was considering ordering hte jtag key |
| 18:43.36 | prpplague | vmaster: even though i already have th ft2232 board |
| 18:44.42 | vmaster | http://www.olimex.com/dev/arm-usb-ocd.html |
| 18:45.03 | vmaster | sparkfun is going to stock them |
| 18:47.25 | prpplague | vmaster: yea i saw sparkfun added openocd to the forum |
| 18:48.00 | prpplague | vmaster: lovely |
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