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| 14:37.17 | [g2] | vmaster ping |
| 14:39.12 | vmaster | hey g2 |
| 14:39.22 | [g2] | hey vmaster |
| 14:39.40 | vmaster | anything in special, or just general? |
| 14:39.46 | [g2] | I'm probably going to be getting some little ARM chips |
| 14:40.05 | [g2] | I need serial and an SD card |
| 14:40.17 | [g2] | actually two serial ports would be nice |
| 14:40.22 | vmaster | heh, that's something they all have |
| 14:40.36 | vmaster | maybe one of the smallest of both families lack the second uart |
| 14:41.18 | [g2] | I don't need the smallest I don't think the cost is much of an issue as these things are <$10 |
| 14:41.55 | [g2] | I a little interested in tools (compilers/JTAG) I'll be using openocd :) |
| 14:41.56 | vmaster | they all have SPI interfaces, so interfacing to SD shouldn't be a problem |
| 14:42.27 | [g2] | so any chips you really like ? |
| 14:42.47 | [g2] | or any to say away from ? |
| 14:43.01 | vmaster | not really, they're mostly the same |
| 14:43.10 | vmaster | the LPCs can run a bit faster, especially the newer ones |
| 14:43.16 | vmaster | up to 70MHz operation |
| 14:43.25 | vmaster | the SAM7X has an integrated ethernet controller |
| 14:43.38 | vmaster | the SAM7 have USB device ports |
| 14:43.46 | vmaster | the LPC214x has USB, too |
| 14:44.14 | vmaster | running out of flash, the SAM7 are slower |
| 14:44.33 | vmaster | you can get cheap devboards for both families from sparkfun |
| 14:44.48 | vmaster | the OpenOCD supports both families, including programming the on-chip flash |
| 14:45.13 | vmaster | the LPC22xx have an external address bus |
| 14:46.19 | vmaster | the memory accelerator module (MAM) of the LPCs allows them to work almost at full speed from flash, only very jumpy code is penalized |
| 14:46.49 | vmaster | the LPC2000 group at yahoogroups is very active, you'll get immediate help for almost every problem, and Philips monitors the group |
| 14:47.47 | vmaster | both families are in-system programmable via UART, the SAM7 also via USB, iirc |
| 14:47.53 | p2-mate | MAM is a fancy new name for cache ? |
| 14:48.05 | vmaster | a very simple form of cache |
| 14:48.41 | vmaster | the flash is internally 128-bit wide |
| 14:48.41 | vmaster | and the MAM is made of two 128-bit latches |
| 14:48.50 | vmaster | so even if a flash access takes two or three cycles, the MAM allows the core to continue full-speed |
| 14:49.32 | p2-mate | as long as it correctly predicts the next 128bit access |
| 14:49.36 | vmaster | yep |
| 14:50.11 | vmaster | the general opinion in the lpc2000 seems to be that the MAM works reasonably well for real world code |
| 14:50.22 | vmaster | s/lpc2000/lpc2000-group/ |
| 14:50.30 | p2-mate | which isn't too easy as it's not part of the CPU core (think of function returns using blr) |
| 14:51.04 | p2-mate | s/blr/bl |
| 14:51.26 | [g2] | sounds like the LPC2K family is a winner |
| 14:51.42 | vmaster | heh, that's probably because i used the more than the sam7 |
| 14:51.48 | vmaster | str7 seems to be competitive, too |
| 14:52.17 | [g2] | have you used the sparkfun boards ? |
| 14:53.20 | vmaster | i have a LPC2294 header board, a SAM7H64 header board and the SAM7EX dev board |
| 15:07.15 | [g2] | vmaster do you use gcc as a compiler ? |
| 15:07.29 | [g2] | gcc/binutils/gdb etc.. |
| 15:15.27 | vmaster | yeah, sure |
| 15:16.16 | vmaster | i use the toolchain from codesourcery, since gnuarm stopped providing ia-32 linux binaries |
| 15:16.25 | vmaster | or the ELDK from Denx |
| 15:16.51 | vmaster | people are using the OpenOCD with Eclipse, but I prefer commandline gdb |
| 15:19.36 | prpplague | vmaster: you like the lpc and sam series? |
| 15:20.22 | vmaster | mhh, yeah, they're nice and cheap |
| 15:21.48 | prpplague | yea, just wish they had a little bigger flash/ram combo |
| 15:22.03 | prpplague | thats one reason we are doing the arm9 device in a 40-pin dip package |
| 15:22.14 | vmaster | mhh, they're about to get bigger variants out |
| 15:22.22 | vmaster | LPC2880 for example |
| 15:22.56 | prpplague | still not big enough to run uclinux effectively |
| 15:23.40 | vmaster | mhh, no, but they're powerfull replacements for all the 8/16 bitters out there |
| 15:23.50 | prpplague | oh yea |
| 15:24.19 | vmaster | uclinux is going to need a device with an external bus, isn't it? |
| 15:24.26 | vmaster | even a meg of flash is too little |
| 15:24.39 | vmaster | and you'll need several megs of RAM |
| 15:24.57 | prpplague | vmaster: you can do it with 1mb ram and 1mb flash |
| 15:25.07 | prpplague | its tight but it's doable |
| 15:25.20 | vmaster | heh, yeah, but that's academic, imho |
| 15:25.28 | prpplague | vmaster: yea |
| 15:25.39 | prpplague | vmaster: effective use would be 1mb flash and 2mb ram |
| 16:11.22 | key2 | is there only one kind of AMR JTAG connector ? |
| 16:11.35 | key2 | or each constructor would use its own pinout |
| 16:19.58 | prpplague | key2: there is an official document from IEEE that describes "standard" pinouts |
| 16:20.21 | prpplague | key2: however, most manufacturers do not implement the "standard" pinouts due to space restrictions |
| 16:20.53 | prpplague | key2: most production device simple have test pads which are used with what they call a "needle bed" |
| 16:21.12 | vmaster | most ARM dev boards i've seen use the 20-pin ARM JTAG |
| 16:21.43 | prpplague | vmaster: yea? |
| 16:22.02 | prpplague | vmaster: i don't own a single arm dev board that has a 2x10 header |
| 16:22.08 | prpplague | vmaster: everyone i have is 2x7 |
| 16:22.18 | prpplague | vmaster: (that has a header) |
| 16:22.29 | key2 | prpplague: I have a 2x5 connector |
| 16:22.46 | prpplague | key2: arm? |
| 16:22.54 | key2 | prpplague: and since the chip its connected to is BGA, i won't really be able to figure out what is what |
| 16:22.54 | key2 | prpplague: yeah |
| 16:22.58 | key2 | prpplague: the conexant cx82100 |
| 16:23.04 | prpplague | key2: thats a non-standard connector but is common |
| 16:23.57 | key2 | prpplague: well when I look at the connector, it has the Gnd on two pins one in front of the otherone |
| 16:24.07 | key2 | and in none of the 2x5 jtag pinout i've seen, i could see that |
| 16:24.08 | key2 | .. |
| 16:24.24 | vmaster | the 2x7 is the old ARM standard |
| 16:24.34 | prpplague | vmaster: yea |
| 16:24.36 | vmaster | they've moved to the 2x10 to have a GND for every signal |
| 16:24.48 | prpplague | vmaster: the 2x10 with the offset gnd lines is much better |
| 16:24.58 | prpplague | vmaster: just the extra pins makes it a pain |
| 16:25.23 | prpplague | key2: yea thats probably just for cross-talk protection |
| 16:25.36 | prpplague | key2: this a dev board? |
| 16:25.42 | key2 | prpplague: no |
| 16:25.50 | prpplague | ahh |
| 16:25.58 | prpplague | key2: fun fun |
| 16:26.24 | prpplague | key2: usually what i have to do for hacking is sacrifice a board and depopulate it with a head gun |
| 16:26.26 | prpplague | heat |
| 16:26.48 | key2 | prpplague: and then u look with what ? |
| 16:27.07 | prpplague | key2: find the bga package listing in the datasheets |
| 16:27.17 | prpplague | key2: locate the jtag pins on the bga package |
| 16:27.28 | prpplague | key2: they tone it out with a multimeter |
| 16:27.31 | prpplague | then |
| 16:27.33 | prpplague | argh |
| 16:27.35 | prpplague | i can't type today |
| 16:27.49 | key2 | prpplague: yeah I got it |
| 16:27.57 | key2 | but I'll have to sacrify one of the board :) |
| 16:28.42 | prpplague | yea |
| 16:28.49 | prpplague | price of hacking |
| 16:29.00 | prpplague | key2: i usually get 3 of whatever i am hacking |
| 16:29.07 | prpplague | key2: one to de populate |
| 16:29.15 | prpplague | key2: one for dev platform |
| 16:29.23 | prpplague | key2: one as a reference device |
| 16:30.32 | key2 | prpplague: I have an other pb here |
| 16:30.37 | key2 | it uses an ARM9TDMI |
| 16:30.44 | key2 | and it has its own MAC interface |
| 16:30.53 | key2 | and the current kernel is vxwork |
| 16:31.07 | key2 | so I dunno how am gonna manage to get the eth working since I don't have those drivers |
| 16:31.29 | prpplague | key2: this a hobby hack? |
| 16:31.37 | key2 | yeah |
| 16:31.53 | prpplague | ahh |
| 16:31.57 | prpplague | key2: what device? |
| 16:33.02 | key2 | bewane |
| 16:35.39 | prpplague | key2: hmm nothing poping up on google |
| 16:47.22 | key2 | prpplague: its a bewan ATA |
| 16:48.47 | key2 | http://www.bewan.com/bewan/products/voip/bphonebox.php |
| 16:49.42 | prpplague | ahh |
| 16:49.44 | prpplague | lots of fun there |
| 16:50.36 | key2 | prpplague: it's a cx82100 |
| 16:50.39 | key2 | i have the datasheet |
| 16:52.36 | key2 | 'http://www.tranzistoare.ro/datasheets/2300/500021_DS.pdf |
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| 18:27.03 | key2 | someone knows what's the .DLF file format ? |
| 18:52.39 | prpplague | key2: http://filext.com/detaillist.php?extdetail=DLF |
| 19:22.52 | key2 | prpplague: I get a vxWorks.z but the file is not a correct archive |
| 19:22.57 | key2 | it doesnt have the header |
| 19:23.04 | key2 | have an idea of how I could uncompress it ? |
| 19:23.30 | prpplague | sorry now |
| 19:23.34 | prpplague | no |
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