Seeed
MaKey MaKey mbed version, http://makeymakey.com/
Revision 0:4755a81efb1d, committed 2014-05-26
- Comitter:
- yihui
- Date:
- Mon May 26 08:03:17 2014 +0000
- Commit message:
- initial
Changed in this revision
diff -r 000000000000 -r 4755a81efb1d USBDevice.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBDevice.lib Mon May 26 08:03:17 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/USBDevice/#33920e3786aa
diff -r 000000000000 -r 4755a81efb1d main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon May 26 08:03:17 2014 +0000
@@ -0,0 +1,64 @@
+#include "mbed.h"
+#include "USBKeyboard.h"
+
+#define LOG(args...) // printf(args)
+
+#define THRESHOLD 2
+#define TOUCH_N 6
+
+BusOut leds(LED1, LED2, LED3, LED4);
+Ticker tick;
+USBKeyboard keyboard;
+
+uint8_t key_map[TOUCH_N] = {RIGHT_ARROW, LEFT_ARROW, DOWN_ARROW, UP_ARROW, ' ', '\n'};
+PinName touch_pin[TOUCH_N] = {A0, A1, A2, A3, A4, A5};
+DigitalInOut *p_touch_io[TOUCH_N];
+
+uint8_t touch_data[TOUCH_N] = {0, };
+
+void detect(void)
+{
+ for (int i = 0; i < TOUCH_N; i++) {
+ uint8_t count = 0;
+ DigitalInOut *touch_io = p_touch_io[i];
+
+ touch_io->input();
+ touch_data[i] <<= 1;
+ while (touch_io->read()) {
+ count++;
+ if (count > THRESHOLD) {
+ touch_data[i] |= 0x01;
+ break;
+ }
+ }
+ touch_io->output();
+ touch_io->write(1);
+
+ if (0x01 == touch_data[i]) { // a measurement is about the threshold, get a touch
+ leds = 1 << i;
+ keyboard.putc(key_map[i]);
+ LOG("No %d key is touched\r\n", i);
+ } else if (0x80 == touch_data[i]) { // last 7 measurement is under the threshold, touch is released
+ leds = 0x00;
+ LOG("No %d key is released\r\n", i);
+ }
+ }
+}
+
+int main()
+{
+ // setup
+ for (int i = 0; i < TOUCH_N; i++) {
+ p_touch_io[i] = new DigitalInOut(touch_pin[i]);
+ p_touch_io[i]->mode(PullDown);
+ p_touch_io[i]->output();
+ p_touch_io[i]->write(1);
+ }
+
+ tick.attach(detect, 1.0 / 64.0);
+
+ while(1) {
+ // do something
+ wait(1);
+ }
+}
diff -r 000000000000 -r 4755a81efb1d mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon May 26 08:03:17 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/0b3ab51c8877 \ No newline at end of file