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| xobs | Hi all. I created a "quickstart" repo, where all you need is any ARM compiler and a copy of "make". It's at http://github.com/im-tomu/tomu-quickstart | 09:25 |
|---|---|---|
| tpb | Title: GitHub - im-tomu/tomu-quickstart: A quicker way to get started building samples (at github.com) | 09:25 |
| xobs | I started working on captouch, in case anyone feels like poking at that. It definitely needs tuning. My current work is in the "captouch" directory. | 09:26 |
| xobs | I did some of the work on the flight I just got off of. It works by writing status data to the serial port. | 09:28 |
| xobs | I snuck in the captouch trick from MadHacker, too, so there are more options for inputs. | 09:34 |
| xobs | But it's largely untested. I don't have a portable scope for the plane, for example. | 09:35 |
| MadHacker | xobs: Sound card? | 10:19 |
| MadHacker | The sample rate is a bit limited, but it's more than zero. | 10:19 |
| MadHacker | Also, just had a fun thought. Because you have two adjacent touch pads, and because you can get some "pressure" sensing from the cap touch waveform, you can potentially sense "drags" across them. | 10:22 |
| MadHacker | So you can have two touches plus two drag directions plus touch in the centre (across both) for user interactions. | 10:23 |
| MadHacker | On metal-cased laptops I wonder if you can tell the difference between a user isolated from the case and touching the case, too? | 10:25 |
| MadHacker | Sorry, just throwing some ideas out there. | 10:26 |
| xobs | Ideas are good. | 10:32 |
| xobs | I need to hook up a scope to figure out why only one of the pads is reliably doing touch sensing. | 10:32 |
| MadHacker | Is there an ADC on either pin? | 10:43 |
| MadHacker | Croc-clip the two together maybe. | 10:43 |
| MadHacker | (or paperclip, even) | 10:43 |
| MadHacker | + then use one as an ADC to diagnose the other. | 10:43 |
| MadHacker | Or between two tomus. | 10:43 |
| xobs | There is an ADC on each pin. | 10:51 |
| xobs | Rather, there is an ADC on PE12 and PE13, which are the compliments of PC0 and PC1. | 10:51 |
| MadHacker | You won't have the ADC bandwidth to sample the waveform directly, I guess, but you can probably configure it to run like a sampling oscilloscope with a little careful timing, because it's a repetitive waveform you're trying to sample. | 10:54 |
| xobs | Timing isn't so great on Tomu, because of the lack of a crystal. The MCU does, however, do some clever clock recovery to get it to +/- 1% of 24 MHz. | 11:39 |
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| MadHacker | Did anyone get dirtypcbs to do a batch of tomu boards? Turn out OK? | 11:58 |
| xobs | I got Hackvana to. They turned out alright, aside from my bad PCB design. | 12:04 |
| xobs | dirtypcbs seemed alright, too. | 12:04 |
| xobs | Though I never actually powered those up. | 12:05 |
| MadHacker | I've ordered some up, then, and I'll give them a go. | 12:06 |
| MadHacker | I'll let you know how I get on. | 12:06 |
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