Mercurial > hp34970-firmware / file comparison
comparison: lib/keypad/Keypad.cpp
lib/keypad/Keypad.cpp
- changeset 33
- 167010858b8d
- parent 28
- 424d792fea4f
- child 66
- 48f29a1d43d6
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| 32:bc1d6ecbb0cc | 33:167010858b8d |
|---|---|
| 43 for (row=0; row<(_ncols*_nrows); row++) | 43 for (row=0; row<(_ncols*_nrows); row++) |
| 44 _keys[row] = 0; | 44 _keys[row] = 0; |
| 45 | 45 |
| 46 while(_started) | 46 while(_started) |
| 47 { | 47 { |
| 48 // activate column col | |
| 48 _columns[col].write(1); | 49 _columns[col].write(1); |
| 49 ThisThread::sleep_for(5); | 50 ThisThread::sleep_for(5); |
| 50 for(row=0; row<_nrows; row++) | 51 for(row=0; row<_nrows; row++) |
| 51 { | 52 { |
| 52 if (_rows[row].read()) | 53 if (_rows[row].read()) |
| 53 { | 54 { |
| 54 if (_keys[row + _nrows*col] < 2) | 55 if (_keys[row + _nrows*col] < 2) // ensure only one key is pressed in this column |
| 55 { | 56 { |
| 56 _keys[row + _nrows*col]++; | 57 _keys[row + _nrows*col]++; |
| 57 if ((_keys[row + _nrows*col] == 2) && _kp_callback) | 58 if ((_keys[row + _nrows*col] == 2) && _kp_callback) |
| 58 _kp_callback.call(row, col); | 59 _kp_callback.call(row, col); |
| 59 } | 60 } |
| 81 _kr_callback = kr_callback; | 82 _kr_callback = kr_callback; |
| 82 } | 83 } |
| 83 | 84 |
| 84 void Keypad::start(void) | 85 void Keypad::start(void) |
| 85 { | 86 { |
| 86 if (_started) | 87 if (_started) |
| 87 return; | 88 return; |
| 88 _started = true; | 89 _started = true; |
| 89 _loop.start(callback(this, &Keypad::run)); | 90 _loop.start(callback(this, &Keypad::run)); |
| 90 } | 91 } |
| 91 | 92 |
| 92 void Keypad::stop(void) | 93 void Keypad::stop(void) |
| 93 { | 94 { |
| 94 _started = false; | 95 _started = false; |
