| kristianpaul | hmm why detect silently return nothing after cable milkymist set on urjtag.. | 00:14 |
|---|---|---|
| kristianpaul | hmm debug seems not help that much. | 00:31 |
| viric | hellekin: I was just trolling a bit for fun. Don't take me serious on that :) | 08:57 |
| apelete | Good morning #qi-hardware | 09:28 |
| apelete | I am planning to solder a serial console output port on my ben nanonote by following the wiki instructions here: http://en.qi-hardware.com/wiki/Serial_console | 09:31 |
| apelete | but then I stumble upon the UBB: http://en.qi-hardware.com/wiki/UBB | 09:31 |
| apelete | can the UBB be used to make a serial output port more easily ? | 09:32 |
| larsc | no | 09:35 |
| apelete | larsc: no ? | 09:36 |
| larsc | well, you can have UART on the UBB, but that's gpio bitbanging based uart | 09:36 |
| apelete | larsc: I don't get it, what do you mean ? what I need is a serial output to debug uboot and the kernel during aerly boot | 09:39 |
| apelete | is that possible using a UBB or not ? | 09:39 |
| larsc | no | 09:40 |
| larsc | (well it is, given you invest enough time to implement it, but not out of the box) | 09:41 |
| apelete | larsc: ok, so txd, rxd and gnd pins accessible under the ben's battery cannot be accessed with a UBB | 09:42 |
| larsc | yes | 09:44 |
| apelete | larsc: thanks a lot. it's a pity though :) | 09:44 |
| larsc | the UBB pins go straigth to the MMC pins of the JZ4740. And since there is no internal pin muxer you can only either use them as GPIOs or MMC. | 09:48 |
| hellekin | viric :P :P | 10:15 |
| hellekin | :) | 10:15 |
| kristianpaul | wpwrak: about FPGA Programming for the Masses you pointed latelly, dont you think fpgas may take advantage if the model of running apps on a operating systems change to the app be the operating system, so it can be easilly tied to a hw modelated on a fpga? | 15:00 |
| whitequark | masses can't figure out threads, much less fpgas | 15:04 |
| whitequark | kristianpaul: besides, I think that it makes much more sense to use FPGA as a reconfigurable coprocessor alongside a 'proper' host CPU | 15:04 |
| whitequark | such as parallella with the ARM core powerful enough to run ubuntu and gcc, and the SIMD array. it's the same overall design | 15:06 |
| whitequark | the article correctly notes that for any particular workload, FPGA is far more power (and cost) efficient | 15:06 |
| whitequark | but what it doesn't note is that for an arbitrary workload, traditional CPU still excel | 15:07 |
| kristianpaul | threads, :) | 15:07 |
| larsc | well, a bit simplified, but still, cpus are good for sequential stuff, fpgas for parallel | 15:08 |
| whitequark | larsc: that's only a part of the story | 15:09 |
| kristianpaul | sure sure, looks a network sw, it have a cpu for the general stuff and ASICs for the custom sw routing fabric | 15:09 |
| whitequark | what will you choose, a real, hardware and fast (way faster than its fpga analogue) ARM core running linux, or a hypothetical ideal-for-linux core on an FPGA? | 15:09 |
| whitequark | and not all parallel workloads can work on an FPGA | 15:10 |
| kristianpaul | larsc: but how to agree in that parallel computing, when at the end talking with the fpga relays on a memory maped sutff not something you could ask your kernel do for you, unless you write a driver ;) | 15:10 |
| larsc | well these days we have stuff like OpenCL to offload tasks for example to the graphics card | 15:14 |
| larsc | the same can be done with reconfigurable fpgas | 15:14 |
| larsc | the problem though is, you can't really built bitstreams on demand these days | 15:14 |
| whitequark | ... yet | 15:15 |
| viric | apelete: when I started debugging kernel things, I wrote this: http://viric.name/cgi-bin/nanonixos/doc/trunk/doc/kerneldbg/index.wiki | 17:13 |
| apelete | viric: wow, thanks | 17:19 |
| apelete | viric: so you soldered a serial port on the nanonote to achieve this ? | 17:20 |
| viric | nah | 17:23 |
| viric | I soldered thin wires to the pads below the battery | 17:23 |
| viric | so I can have the battery in | 17:23 |
| apelete | viric: ok, that's what I meant by "soldered a serial port" | 17:24 |
| viric | ok | 17:24 |
| viric | then I have a ftdi cable, for 3.3v | 17:25 |
| apelete | I bought an FTDI cable too. I was wondering if the "soldering wires" option was the only one to get a serial output on the nanonote | 17:26 |
| apelete | but it seems there's no other way. soldering it will be. | 17:27 |
| guanucoluis1 | hi all, anyone used a jtag-broad based ft2232d? | 17:29 |
| viric | board? | 17:31 |
| viric | doesn't the sheevaplug use that? | 17:32 |
| guanucoluis1 | yes, board, sorry | 17:32 |
| --- Mon Mar 4 2013 | 00:00 | |
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