Seeed / Mbed 2 deprecated MaKeyMaKey_mbed_version

MaKey MaKey mbed version, http://makeymakey.com/

Dependencies:   USBDevice mbed

main.cpp@0:4755a81efb1d, 2014-05-26 (annotated)

Committer:
yihui
Date:
Mon May 26 08:03:17 2014 +0000
Revision:
0:4755a81efb1d
initial

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 0:4755a81efb1d 1 #include "mbed.h"
yihui 0:4755a81efb1d 2 #include "USBKeyboard.h"
yihui 0:4755a81efb1d 3
yihui 0:4755a81efb1d 4 #define LOG(args...) // printf(args)
yihui 0:4755a81efb1d 5
yihui 0:4755a81efb1d 6 #define THRESHOLD 2
yihui 0:4755a81efb1d 7 #define TOUCH_N 6
yihui 0:4755a81efb1d 8
yihui 0:4755a81efb1d 9 BusOut leds(LED1, LED2, LED3, LED4);
yihui 0:4755a81efb1d 10 Ticker tick;
yihui 0:4755a81efb1d 11 USBKeyboard keyboard;
yihui 0:4755a81efb1d 12
yihui 0:4755a81efb1d 13 uint8_t key_map[TOUCH_N] = {RIGHT_ARROW, LEFT_ARROW, DOWN_ARROW, UP_ARROW, ' ', '\n'};
yihui 0:4755a81efb1d 14 PinName touch_pin[TOUCH_N] = {A0, A1, A2, A3, A4, A5};
yihui 0:4755a81efb1d 15 DigitalInOut *p_touch_io[TOUCH_N];
yihui 0:4755a81efb1d 16
yihui 0:4755a81efb1d 17 uint8_t touch_data[TOUCH_N] = {0, };
yihui 0:4755a81efb1d 18
yihui 0:4755a81efb1d 19 void detect(void)
yihui 0:4755a81efb1d 20 {
yihui 0:4755a81efb1d 21 for (int i = 0; i < TOUCH_N; i++) {
yihui 0:4755a81efb1d 22 uint8_t count = 0;
yihui 0:4755a81efb1d 23 DigitalInOut *touch_io = p_touch_io[i];
yihui 0:4755a81efb1d 24
yihui 0:4755a81efb1d 25 touch_io->input();
yihui 0:4755a81efb1d 26 touch_data[i] <<= 1;
yihui 0:4755a81efb1d 27 while (touch_io->read()) {
yihui 0:4755a81efb1d 28 count++;
yihui 0:4755a81efb1d 29 if (count > THRESHOLD) {
yihui 0:4755a81efb1d 30 touch_data[i] |= 0x01;
yihui 0:4755a81efb1d 31 break;
yihui 0:4755a81efb1d 32 }
yihui 0:4755a81efb1d 33 }
yihui 0:4755a81efb1d 34 touch_io->output();
yihui 0:4755a81efb1d 35 touch_io->write(1);
yihui 0:4755a81efb1d 36
yihui 0:4755a81efb1d 37 if (0x01 == touch_data[i]) { // a measurement is about the threshold, get a touch
yihui 0:4755a81efb1d 38 leds = 1 << i;
yihui 0:4755a81efb1d 39 keyboard.putc(key_map[i]);
yihui 0:4755a81efb1d 40 LOG("No %d key is touched\r\n", i);
yihui 0:4755a81efb1d 41 } else if (0x80 == touch_data[i]) { // last 7 measurement is under the threshold, touch is released
yihui 0:4755a81efb1d 42 leds = 0x00;
yihui 0:4755a81efb1d 43 LOG("No %d key is released\r\n", i);
yihui 0:4755a81efb1d 44 }
yihui 0:4755a81efb1d 45 }
yihui 0:4755a81efb1d 46 }
yihui 0:4755a81efb1d 47
yihui 0:4755a81efb1d 48 int main()
yihui 0:4755a81efb1d 49 {
yihui 0:4755a81efb1d 50 // setup
yihui 0:4755a81efb1d 51 for (int i = 0; i < TOUCH_N; i++) {
yihui 0:4755a81efb1d 52 p_touch_io[i] = new DigitalInOut(touch_pin[i]);
yihui 0:4755a81efb1d 53 p_touch_io[i]->mode(PullDown);
yihui 0:4755a81efb1d 54 p_touch_io[i]->output();
yihui 0:4755a81efb1d 55 p_touch_io[i]->write(1);
yihui 0:4755a81efb1d 56 }
yihui 0:4755a81efb1d 57
yihui 0:4755a81efb1d 58 tick.attach(detect, 1.0 / 64.0);
yihui 0:4755a81efb1d 59
yihui 0:4755a81efb1d 60 while(1) {
yihui 0:4755a81efb1d 61 // do something
yihui 0:4755a81efb1d 62 wait(1);
yihui 0:4755a81efb1d 63 }
yihui 0:4755a81efb1d 64 }