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--- avr:t84:usense [2014/09/07 19:43] – [Pictures] redox
+++ avr:t84:usense [Unknown date] (current) – removed - external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-# USense
-## Overview
-Well, this project is a little, quick, and fun one. Basically, the idea was to see what could be done with some RGB leds and capacitive touch inputs.
-## Pictures
-{{:avr:t84:usense:usense1.jpg?200|}} {{:avr:t84:usense:usense2.jpg?200|}} {{:avr:t84:usense:usense3.jpg?200|}}
-## PCB
-Always print the PCB at 300DPI. The text acts as a fool-proof system. It should be readable on your final board.
-B
-### Version 0
-Before designing a board, I wanted to try the "capacitive input" stuff, so I designed this quick PCB
-{{ :avr:t84:usense:sense_a.jpg?200 |Test PCB}}
-### Version 1
-{{ :avr:t84:usense:usense_a.jpg?200 |USense version 1}}
-First version, used mostly for the firmware development and debug. The actual board is quite messy now, but still works. In this version, I thought I would put four leds on the board, but one was already enough...
-### Version 2
-{{ :avr:t84:usense:usense_c.jpg?200 |Usense version  2}}
-I think this is the "Release" version.
-## Firmware
-### Test firmware
-Since I don't have too much spare time, I  only wrote a quick firmware to test the board and be able to give the v2 to a friend.
-- The RGB led pulses/fades from one color to another automatically
-- One capacitive input increases the fading speed
-- The other decreases the speed
-- The two combined change the color changing cycle
-### Protocol
-<code>
-Messages are 8 bytes long (since it is the limit for wMaxPacketSize for low-speed USB devices)
-[ Mode ] [ Val0 ] [ Val1 ] [ Val2 ] [ Val3 ] [ Val4 ] [ Val5 ] [ Val6 ]
-* PC > USense *********************************************************
-[ 0x01 ] Fade On
-    [ 0xRR ] Maximum brightness Red
-    [ 0xGG ] Maximum brightness Green
-    [ 0xBB ] Maximum brightness Blue
-[ 0x02 ] Fade Off
-[ 0x03 ] Get Fade
-[ 0x04 ] Set Fade Steps
-    [ 0xVV ] 0x00-020
-[ 0x05 ] Get Fade Steps
-[ 0x06 ] Set Fade Delay
-[ 0x07 ] Get Fade Delay
-[ 0x10 ] Set Fixed color
-    [ 0xRR ] [ OxGG ] [ 0xBB ]
-[ 0x11 ] Get LEDs color
-[ 0x12 ] LEDs Off
-[ 0x20 ] Get Touch
-[ 0x21 ] Enable Touch INT
-[ 0x22 ] Disable Touch INT
-[ 0x23 ] Get Touch INT
-[ 0x24 ] Enable Touch ACT
-[ 0x25 ] Disable Touch ACT
-[ 0x26 ] Get Touch ACT
-[ 0x30 ] Get Fade Mode
-[ 0x31 ] Set Fade Mode
-[ 0x80 ] Reset
-* Usense > PC *********************************************************
-Usually, it's just an Ack so:
-[ 0xRR ] [ 0xAA ]
-        [ 0xRR ] The request code (see PC > USense)
-        [ 0xAA ] Ack (0x42) or NAck (0xFF) Value for the previous request
-For the "Get" requests, it's an Ack, then the value:
-[ 0xRR ] [ 0xAA ] [ 0xV1 ] [ 0xV2 ] ...
-        [ 0xRR ] The request code (see PC > USense)
-        [ 0xAA ] Ack (0x42) or NAck (0xFF) Value for the previous request
-        [ 0xV1 ] ... The returned Value
-ex:
-Get LEDs color
-[ 0x11 ] [ 0x42 ] [ 0xRR ] [ 0xGG ] [ 0xBB ] [ 0xrr ] [ 0xgg ] [ 0xbb ]
-    in capital letters: Value
-    in small letters: maximum fvalue for fading stuff
-Get Touch
-[ 0x23 ] [ 0x42 ] [ 0xVV ] Returns Inputs mask
-        [ 0xVV ] Touch inputs mask (0b1 means pressed, 0b0 means released)
-Special case: for the "INT" messages, the auto-ack is 0x24 instead of 0x42
-ex: Touch INT
-[ 0x23 ] [ 0x24 ] [ 0xVV ] Touch INT message
-        [ 0xVV ] See above
-</code>