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| Views: 1,609,257 | Main | Rules/FAQ | Memberlist | Active users | Last posts | Calendar | Stats | Online users | Search | 11-21-24 12:11 PM |
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| Main - Reverse-engineering - Touch Screen? | Show post layouts | New reply |
| gudenau |
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Member Normal user Level: 14 
Posts: 28/34 EXP: 11565 Next: 1506 Since: 07-29-15 From: /dev/random Last post: 3110 days ago Last view: 3056 days ago |
Anyone have info on how the 3DS gets its input from the touch screen? |
| profi200 |
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Member Who knows? Level: 19 Posts: 62/70 EXP: 34507 Next: 1270 Since: 05-21-15 From: Germany Last post: 2992 days ago Last view: 2860 days ago |
*cough* libnds *cough* |
| gudenau |
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Member Normal user Level: 14
Posts: 29/34 EXP: 11565 Next: 1506 Since: 07-29-15 From: /dev/random Last post: 3110 days ago Last view: 3056 days ago |
Posted by profi200 Is the hardware really the same though? I know it changed from DS to DSi and I don't want to use compatibility modes. |
| nocash |
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Normal user Level: 20 Posts: 32/77 EXP: 38996 Next: 3443 Since: 10-09-15 Last post: 2097 days ago Last view: 2013 days ago |
libnds should contain code for both DS and DSi modes (that code will require "low level" access to SPI bus).
don't know if 3DS comes up with a different mode, just try the DSi code. If it works, then DSi and 3DS are apparently accessing it the same way. calibration data could be read in DS fashion (from wifi flash), but there should be also a 3DS specific config file containing the same calibration values (probably also stored somewhere in RAM). |
| profi200 |
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Member Who knows? Level: 19 Posts: 63/70 EXP: 34507 Next: 1270 Since: 05-21-15 From: Germany Last post: 2992 days ago Last view: 2860 days ago |
xerpi is reverse engineering sysmodules right now to find out how to do it. Unfortunately the DSi touchscreen read code in libnds does not correctly work. I thought because it is backwards compatible that could work but it is different in 3DS mode. |
| xerpi |
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Newcomer Normal user Level: 5 Posts: 3/4 EXP: 484 Next: 45 Since: 11-11-14 Last post: 3157 days ago Last view: 3156 days ago |
Here's all the RE I've done to the GPIO module: http://pastie.org/private/b17vatmthopnxufqb5trw
I'm still trying to figure out how the GPIO registers work. |
| Dazzozo |
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Member Dev of "the best software that almost nobody will ever use" Level: 9 
Posts: 13/13 EXP: 2761 Next: 401 Since: 05-21-15 Last post: 3160 days ago Last view: 2993 days ago |
see http://3dbrew.org/w/index.php?title=Codec_Services&curid=2071&diff=16241&oldid=13745
These use SPI device 3, I think the legacy (TWL) device was 2. |
| gudenau |
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Member Normal user Level: 14
Posts: 30/34 EXP: 11565 Next: 1506 Since: 07-29-15 From: /dev/random Last post: 3110 days ago Last view: 3056 days ago |
Oh, so mr Linux was working on it. Cool.
Guess I'll just do other things... |
| xerpi |
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Newcomer Normal user Level: 5 Posts: 4/4 EXP: 484 Next: 45 Since: 11-11-14 Last post: 3157 days ago Last view: 3156 days ago |
Yesterday I finally got the touchscreen working on Linux after porting the RE'd code from the codec and SPI services. I'll post the pseudo-code to get the touchscreen initialized and read from it soon. |
| gudenau |
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Member Normal user Level: 14
Posts: 31/34 EXP: 11565 Next: 1506 Since: 07-29-15 From: /dev/random Last post: 3110 days ago Last view: 3056 days ago |
Posted by xerpi Nice, got ARM9 <-> ARM11 yet? |
| Main - Reverse-engineering - Touch Screen? | Show post layouts | New reply |
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