Clemens Valens
mbed with Nintendo DS touchpad, accelerometer & touchpad.
touchpad.cpp@0:0a76ae27065b, 2010-05-05 (annotated)
- Committer:
- Clemo
- Date:
- Wed May 05 12:10:15 2010 +0000
- Revision:
- 0:0a76ae27065b
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| Clemo | 0:0a76ae27065b | 1 | /* |
| Clemo | 0:0a76ae27065b | 2 | Touchpad driver. |
| Clemo | 0:0a76ae27065b | 3 | |
| Clemo | 0:0a76ae27065b | 4 | CPV, 3/9/2009 |
| Clemo | 0:0a76ae27065b | 5 | */ |
| Clemo | 0:0a76ae27065b | 6 | |
| Clemo | 0:0a76ae27065b | 7 | #include "touchpad.h" |
| Clemo | 0:0a76ae27065b | 8 | |
| Clemo | 0:0a76ae27065b | 9 | |
| Clemo | 0:0a76ae27065b | 10 | void TouchpadChannel::initialise(int min, int quantise_step) |
| Clemo | 0:0a76ae27065b | 11 | { |
| Clemo | 0:0a76ae27065b | 12 | m_min = min; |
| Clemo | 0:0a76ae27065b | 13 | m_quantise_step = quantise_step; |
| Clemo | 0:0a76ae27065b | 14 | m_filter.initialise(8); |
| Clemo | 0:0a76ae27065b | 15 | m_quantised = -1; |
| Clemo | 0:0a76ae27065b | 16 | } |
| Clemo | 0:0a76ae27065b | 17 | |
| Clemo | 0:0a76ae27065b | 18 | |
| Clemo | 0:0a76ae27065b | 19 | int TouchpadChannel::quantise(void) |
| Clemo | 0:0a76ae27065b | 20 | { |
| Clemo | 0:0a76ae27065b | 21 | m_quantised = -1; |
| Clemo | 0:0a76ae27065b | 22 | int raw = m_filter(); |
| Clemo | 0:0a76ae27065b | 23 | if (raw>m_min) |
| Clemo | 0:0a76ae27065b | 24 | { |
| Clemo | 0:0a76ae27065b | 25 | m_quantised = 0; |
| Clemo | 0:0a76ae27065b | 26 | while(raw>m_quantise_step) |
| Clemo | 0:0a76ae27065b | 27 | { |
| Clemo | 0:0a76ae27065b | 28 | raw -= m_quantise_step; |
| Clemo | 0:0a76ae27065b | 29 | m_quantised += 1; |
| Clemo | 0:0a76ae27065b | 30 | } |
| Clemo | 0:0a76ae27065b | 31 | } |
| Clemo | 0:0a76ae27065b | 32 | return m_quantised; |
| Clemo | 0:0a76ae27065b | 33 | } |
| Clemo | 0:0a76ae27065b | 34 | |
| Clemo | 0:0a76ae27065b | 35 | |
| Clemo | 0:0a76ae27065b | 36 | //=============================================== |
| Clemo | 0:0a76ae27065b | 37 | |
| Clemo | 0:0a76ae27065b | 38 | |
| Clemo | 0:0a76ae27065b | 39 | Touchpad::Touchpad(PinName x0, PinName x1, PinName y0, PinName y1) |
| Clemo | 0:0a76ae27065b | 40 | { |
| Clemo | 0:0a76ae27065b | 41 | m_x0 = x0; |
| Clemo | 0:0a76ae27065b | 42 | m_x1 = x1; |
| Clemo | 0:0a76ae27065b | 43 | m_y0 = y0; |
| Clemo | 0:0a76ae27065b | 44 | m_y1 = y1; |
| Clemo | 0:0a76ae27065b | 45 | m_ch_x.initialise(0.1*0xffff,0.16*0xffff); |
| Clemo | 0:0a76ae27065b | 46 | m_ch_y.initialise(0.1*0xffff,0.22*0xffff); |
| Clemo | 0:0a76ae27065b | 47 | } |
| Clemo | 0:0a76ae27065b | 48 | |
| Clemo | 0:0a76ae27065b | 49 | |
| Clemo | 0:0a76ae27065b | 50 | int Touchpad::read(PinName drive_hi, PinName drive_lo, PinName read_hi, PinName read_lo) |
| Clemo | 0:0a76ae27065b | 51 | { |
| Clemo | 0:0a76ae27065b | 52 | DigitalOut out1(drive_hi); |
| Clemo | 0:0a76ae27065b | 53 | DigitalOut out0(drive_lo); |
| Clemo | 0:0a76ae27065b | 54 | AnalogIn in1(read_hi); |
| Clemo | 0:0a76ae27065b | 55 | AnalogIn in0(read_lo); |
| Clemo | 0:0a76ae27065b | 56 | out0 = 0; |
| Clemo | 0:0a76ae27065b | 57 | out1 = 1; |
| Clemo | 0:0a76ae27065b | 58 | return in1.read_u16(); |
| Clemo | 0:0a76ae27065b | 59 | } |
| Clemo | 0:0a76ae27065b | 60 | |
| Clemo | 0:0a76ae27065b | 61 | |
| Clemo | 0:0a76ae27065b | 62 | void Touchpad::tick(void) |
| Clemo | 0:0a76ae27065b | 63 | { |
| Clemo | 0:0a76ae27065b | 64 | m_ch_x.tick(read_x()); |
| Clemo | 0:0a76ae27065b | 65 | m_ch_y.tick(read_y()); |
| Clemo | 0:0a76ae27065b | 66 | } |