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| 03:50.29 | XandriX | prpplague: man that flyswatter2 looks freaking tempting |
| 03:50.31 | XandriX | no fair :P |
| 03:50.39 | prpplague | XandriX: ?? |
| 03:50.55 | prpplague | XandriX: why no fair? |
| 03:50.58 | XandriX | haha sorry about that i was rambling |
| 03:51.38 | XandriX | it was a joke in the sense that in my current situation i could only go for the flyswatter 1 lol |
| 03:51.46 | prpplague | ahh |
| 03:51.47 | prpplague | hehe |
| 03:52.51 | XandriX | still the original flyswatter pretty much covers my needs |
| 03:52.59 | XandriX | someone gave me an stm32f103vet6 dev board |
| 03:53.02 | prpplague | yea |
| 03:53.05 | prpplague | decent tool |
| 03:53.42 | XandriX | and that devboard needs a jtag adapter to program it |
| 03:54.09 | XandriX | if i could find my goodfet i could maybe use that but id rather have something a bit more suited for arm |
| 03:54.46 | XandriX | goodfet can do arm stuff but id haveto build a home made connector and i dont feel like doing so haha |
| 03:55.08 | XandriX | great stuff it is indeed :) |
| 03:56.32 | XandriX | does tincantools ship to canada ? |
| 04:00.30 | prpplague | XandriX: yes they do, plus there are several canadia distributors available |
| 04:00.50 | prpplague | XandriX: if purchase directly from tct, use the USPS shipping method for best rate |
| 04:04.14 | XandriX | figured as much |
| 04:04.36 | XandriX | if all goes well next paycheq i shall order i flyswatter1 i cant wait to mess around with this board |
| 04:05.01 | XandriX | its this one http://www.lctech-inc.com/Hardware/Detail.aspx?id=e01121ab-4a77-43b9-af9a-f94315a10054 |
| 04:09.23 | XandriX | so if im not mistaken i would need the 14 pin to 20 pin arm jtag adapter for the flyswatter 1 to |
| 04:09.48 | prpplague | yea |
| 04:09.58 | prpplague | make sure you get the adapter for the Flyswatter1 |
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| 04:13.34 | XandriX | noted :) |
| 04:14.22 | XandriX | the guy who gave it to me owns a shop and sells some of these boards i will mention to him that unlike the arduino's he sells that one actualy needs a programmer / jtag interface hehe |
| 04:17.19 | XandriX | hrm |
| 04:17.37 | XandriX | not that much of a price difference if i wer to take the flyswatter 2 wich already comes with a 20 pin arm interface and cable |
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| 15:41.19 | T0mW | I'm having the devils own time of getting a 640x480 18bit LVDS working with an i915 controller. Anyone have experience with these things? I've tried VGA16, VESA, and i915. All work in some fashion but not 100%. |
| 15:41.56 | T0mW | What I'm trying to do is open the /dev/fb0 in KD_GRAPHICS mode and write onto the framebuffer. |
| 15:42.49 | T0mW | I can do that, but, organization of the display is "wrong". |
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| 18:15.44 | T0mW | nm it is working now, uvesafb was the solution |
| 18:16.02 | T0mW | prpplague: ping |
| 18:16.15 | prpplague | T0mW: pong |
| 18:16.34 | T0mW | prpplague: 18bit video with lvds, I see not a lot of drivers support this? |
| 18:17.05 | prpplague | T0mW: well from the software perspective, LVDS is irrelevant |
| 18:17.10 | T0mW | prpplague: I was able to get an i915 working correctly using the uvesafb, but it is rgb565 |
| 18:17.20 | T0mW | not in rgb666 |
| 18:17.45 | prpplague | T0mW: but yes, rgb666 is not as common as a default |
| 18:18.01 | prpplague | T0mW: what people do is support RGB888 and drop the two lsb off each color |
| 18:19.04 | T0mW | prpplague: yeah, ok, but the display shows up as another resolution when you go from 18 to 24 bit. |
| 18:19.18 | T0mW | it stretches |
| 18:20.17 | prpplague | T0mW: that sounds like there is a mismatch somewhere then |
| 18:20.27 | T0mW | prpplague: like using the vesa driver, the color report from the framebuffer info is 32bit, but the console text extends well below the bottom of the lcd. |
| 18:20.55 | prpplague | T0mW: i'd start by looking at the lcd panel |
| 18:20.59 | prpplague | T0mW: is it native lvds? |
| 18:21.11 | T0mW | prpplague: yes, 640x480-18 |
| 18:21.37 | prpplague | T0mW: got a datasheet? |
| 18:21.47 | T0mW | prpplague: naw, advantech unit |
| 18:22.02 | T0mW | prpplague: private labeled |
| 18:22.38 | prpplague | T0mW: and the lvds interface on the host device? |
| 18:22.41 | T0mW | prpplague: do you use a driver specific to the chipset, or do you use the vesa driver with 16bit. |
| 18:22.46 | prpplague | T0mW: is that native or something added on? |
| 18:23.00 | T0mW | prpplague: yes, lvds is internal to the display electronics. |
| 18:23.09 | prpplague | T0mW: ahh ok |
| 18:23.45 | prpplague | T0mW: so i suspect the driver is improperly formating the data then |
| 18:23.59 | prpplague | T0mW: not much you can do unless you have source and can verify the data format |
| 18:24.07 | T0mW | prpplague: the lvds board on the display is branded 'Ampire' another marking is 'Phico' |
| 18:26.53 | prpplague | T0mW: yea, too many variables |
| 18:27.18 | prpplague | T0mW: 1) you need to verify the format the lcd panel is expecting, i.e. data order |
| 18:27.36 | T0mW | prpplague: ok, just thought I'd pick your brain a bit. thanks. |
| 18:28.02 | prpplague | T0mW: 2) you'll need to find out if the firmware on the board you have supports that format |
| 18:28.10 | T0mW | prpplague: probably should pick up a kyocera lvds display and try it out. |
| 18:28.35 | prpplague | T0mW: i created a man-in-the-middle lvds module so i can connect up an oscope or la to check timings |
| 18:28.36 | T0mW | prpplague: heh, probably does, with a Windows driver... |
| 18:29.17 | T0mW | prpplague: still -2F here |
| 18:31.06 | T0mW | prpplague: important thing is that it is now working, now I can draw directly onto the frame buffer. |
| 18:31.40 | T0mW | prpplague: screw it, I've been trying to get them to let me get one of the Minnow boards to investigate replacing the $500+ PC104 module with that. |
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| 19:26.47 | T0mW | prpplague: quick question. With a TFT display, we have HLINE, VLINE, CLK signals, etc. Does the LVDS encode not only data across the 3 color channels, but also the sync signals as well? |
| 19:30.49 | prpplague | T0mW: correct |
| 19:31.08 | T0mW | prpplague: ah, then that could explain things. Thanks. |
| 19:31.16 | prpplague | T0mW: the sn75lvds83b datasheet has a wonderful diagram of the encoding schemes |
| 19:31.21 | prpplague | T0mW: let me get yo a link |
| 19:31.47 | T0mW | the uvesafb driver uses the video bios to perform the framebuffer ops, that is why I could only get this stupid thing working. Must be that the i915 chipset assumes a standard signal rate and the display is not. |
| 19:32.19 | prpplague | T0mW: http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=sn75lvds83b&fileType=pdf |
| 19:32.40 | prpplague | T0mW: yea, another great reason to hate using embedded x86 |
| 19:33.29 | T0mW | prpplague: yeah. I started this project when ARM was still dreaming of multi-cores. |
| 19:40.04 | T0mW | understand that, the sn75lvds83b is a glorified parallel to serial shift register. |
| 19:40.20 | T0mW | dumb data pusher |
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| 20:05.01 | prpplague | T0mW: right, so your x86 board and the lvds display have matching pairs like that |
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| 21:10.48 | MonMotha | T0mW: Yep, the LVDS displays then have the opposite at the other end (probably integrated into another chip). It just de-serializes the data lines and expects the right bits to be in the right place. |
| 21:10.53 | MonMotha | there's a lot of names for the scheme; "PanelLink" is a popular one |
| 21:10.55 | MonMotha | they're generally all the same just under different trade names. Just have to know how many lanes you have |
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