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| 15:30.27 | T0mW | Does anyone know if there is an interrupt request input on the Minnow expansion header? |
| 15:30.47 | T0mW | Can any of the GPIOs be configured as IRQs? |
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| 16:50.40 | T0mW | prpplague: ping |
| 16:51.06 | prpplague | T0mW: pong |
| 16:51.21 | T0mW | prpplague: can any of the minnow GPIOs be configured as IRQ inputs? |
| 16:52.13 | T0mW | prpplague: I've been looking at minnow for use in a project but I need two IRQ from the expansion bus. |
| 16:57.38 | prpplague | T0mW: yes, they all can support IRQ generation from what i understand |
| 16:57.50 | prpplague | T0mW: probably best to join #minnowboard and ask dvhart |
| 16:58.14 | T0mW | prpplague: great! ah, ok, I did look for the IRC channel up on elinux but did not see it. |
| 16:58.16 | prpplague | T0mW: or zenlinux |
| 16:58.30 | prpplague | T0mW: guess we need to get that posted |
| 16:58.36 | T0mW | heh |
| 16:58.40 | T0mW | yup |
| 16:58.53 | T0mW | prpplague: hey, stop working and do some documentation. |
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| 17:34.31 | wmat | adds it |
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| 20:32.35 | KolgVX | anyone used the stk200 and stk300 from kanda for AVR? |
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| 21:08.52 | KolgVX | is it even possible to run an OS on less than 1kb of ram? |
| 21:09.02 | KolgVX | and an ip stack on top of that |
| 21:09.48 | SpeedEvil | IP, possibly not. |
| 21:09.56 | SpeedEvil | UDP - sure |
| 21:10.02 | SpeedEvil | For small packets only. |
| 21:10.24 | SpeedEvil | And 'OS' - for some definitions, yes. |
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| 21:16.35 | txrxcx | im thinking what would be more rewarding. implementing my own protocol for wireless sensor networks or implement an existing one. |
| 21:19.47 | txrxcx | i mean on one hand ill repeat others mistakes by making my own on the other hand i will understand the issues involved more i think |
| 21:20.28 | _av500_ | every man should design a mesh network once in his life |
| 21:23.58 | txrxcx | http://www.atmel.com/devices/ATMEGA1281.aspx <- whats the ram of that thing? |
| 21:27.35 | _av500_ | you mean the number mentioned in the first sentence? |
| 21:27.47 | _av500_ | it's blurred on my copy of the internet |
| 21:31.41 | txrxcx | can you create a reasonable mesh network with 500bytes of ram for each node? |
| 21:32.28 | txrxcx | I want to create a really low power mesh network |
| 21:37.55 | _av500_ | it says 8kb SRAM |
| 21:56.52 | txrxcx | How would you suggest I power 10 MCU:s simultaenously? |
| 21:57.35 | _av500_ | ? |
| 22:06.24 | SpeedEvil | It makes very little sense if you're making your own device not to pick one with 64K RAM |
| 22:06.40 | SpeedEvil | The price difference may be almost negligible |
| 22:07.39 | SpeedEvil | http://www.digikey.com/product-detail/en/LPC810M021FN8FP/568-10182-5-ND/3925130 for example |
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| 22:10.35 | txrxcx | im more interested in the power difference |
| 22:11.03 | SpeedEvil | Again, there can be almost none. |
| 22:11.05 | txrxcx | but i guess i start wirh something bigger so it doesnt become to hard |
| 22:11.09 | SpeedEvil | What is your planned power source. |
| 22:11.56 | txrxcx | researching. batteries in the end, but for the start, can i power 10 nodes from the computer? maybe I need a proper lab power supply. |
| 22:14.27 | SpeedEvil | hahahhhhahahhahh |
| 22:15.14 | SpeedEvil | That chip above draws one microamp in its lowest power config - oscilator running and able to wake up from a counter. You can run 500000 of them from a USB port |
| 22:15.41 | SpeedEvil | Actively running at maximum speed, you can run about 300 of them per port. |
| 22:16.11 | SpeedEvil | 50mA is _huge_ these days from a mobile CPU POV :) |
| 22:16.18 | txrxcx | ok, no need to laugh at the noob. |
| 22:16.25 | txrxcx | but ty for the advice |
| 22:16.28 | SpeedEvil | Sorry :) |
| 22:16.48 | SpeedEvil | Seriously - battery life and power use has gotten so much better in the last couple of decades. |
| 22:17.09 | SpeedEvil | It's - almost - to the point that for some apps, even with a really modest battery, it's easy. |
| 22:17.25 | txrxcx | but how would you hook it up, powering them from the USB? |
| 22:18.01 | SpeedEvil | Sleep for a minute on a low power 1uA clock, wake up for 10ms running at 3mA, read some sensors, squirt a packet over wireless, go to sleep 100ms later. |
| 22:18.07 | _av500_ | power supplies are cheap |
| 22:18.12 | SpeedEvil | you're awake 1/600th of the time or so. |
| 22:18.37 | SpeedEvil | txrxcx: Basically for that chip, you'd just need a 3.3V regulator |
| 22:19.35 | txrxcx | you are talking about my chip? |
| 22:19.52 | SpeedEvil | No - the one I linked |
| 22:20.27 | SpeedEvil | The AVR - 2.7-5.5V - so you could connect it stratight to USB |
| 22:20.48 | SpeedEvil | What is your experience? |
| 22:21.04 | SpeedEvil | It may be better to go with something either pre-constructed, or in an easy to prototype with form. |
| 22:21.24 | SpeedEvil | DIP is a bit silly these days - but it is very easy to prototype with. |
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