Joachim Andersen / keypad

11

Dependents:   Program_R11

keypad.cpp@10:9a9ec143840b, 2012-11-02 (annotated)

Committer:
gj_schoneveld
Date:
Fri Nov 02 22:42:28 2012 +0000
Revision:
10:9a9ec143840b
Parent:
0:2df66331c109
Child:
11:a45e64141ce6
A fork without short circuits

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yoonghm 0:2df66331c109 1 #include "keypad.h"
yoonghm 0:2df66331c109 2
yoonghm 0:2df66331c109 3 Keypad::Keypad(PinName row3, PinName row2, PinName row1, PinName row0,
yoonghm 0:2df66331c109 4 PinName col3, PinName col2, PinName col1, PinName col0,
yoonghm 0:2df66331c109 5 int debounce_ms):
gj_schoneveld 10:9a9ec143840b 6 _row0(row0), _row1(row1), _row2(row2), _row3(row3),
gj_schoneveld 10:9a9ec143840b 7 _cols(col0, col1, col2, col3)
gj_schoneveld 10:9a9ec143840b 8 {
yoonghm 0:2df66331c109 9 _debounce = debounce_ms;
gj_schoneveld 10:9a9ec143840b 10 _row0.mode(PullUp);
gj_schoneveld 10:9a9ec143840b 11 _row1.mode(PullUp);
gj_schoneveld 10:9a9ec143840b 12 _row2.mode(PullUp);
gj_schoneveld 10:9a9ec143840b 13 _row3.mode(PullUp);
gj_schoneveld 10:9a9ec143840b 14 _cols.mode(OpenDrain);
gj_schoneveld 10:9a9ec143840b 15 _cols.output();
gj_schoneveld 10:9a9ec143840b 16 _setupFallTrigger();
yoonghm 0:2df66331c109 17 }
yoonghm 0:2df66331c109 18
gj_schoneveld 10:9a9ec143840b 19 void Keypad::Start(void)
gj_schoneveld 10:9a9ec143840b 20 {
yoonghm 0:2df66331c109 21 _cols = 0x00;
yoonghm 0:2df66331c109 22 }
yoonghm 0:2df66331c109 23
gj_schoneveld 10:9a9ec143840b 24 void Keypad::Stop(void)
gj_schoneveld 10:9a9ec143840b 25 {
gj_schoneveld 10:9a9ec143840b 26 _cols = 0x0F;
gj_schoneveld 10:9a9ec143840b 27 }
gj_schoneveld 10:9a9ec143840b 28
gj_schoneveld 10:9a9ec143840b 29 void Keypad::CallAfterInput(uint32_t (*fptr)(uint32_t index))
gj_schoneveld 10:9a9ec143840b 30 {
yoonghm 0:2df66331c109 31 _input.attach(fptr);
yoonghm 0:2df66331c109 32 }
yoonghm 0:2df66331c109 33
gj_schoneveld 10:9a9ec143840b 34 void Keypad::_callback(int row, InterruptIn &therow)
gj_schoneveld 10:9a9ec143840b 35 {
yoonghm 0:2df66331c109 36 wait_ms(_debounce);
gj_schoneveld 10:9a9ec143840b 37 if (therow != 0)
yoonghm 0:2df66331c109 38 return;
yoonghm 0:2df66331c109 39
yoonghm 0:2df66331c109 40 int c = -1;
gj_schoneveld 10:9a9ec143840b 41 _cols = 0x0E;
yoonghm 0:2df66331c109 42 if (therow == 0)
yoonghm 0:2df66331c109 43 c = 0;
yoonghm 0:2df66331c109 44 else {
gj_schoneveld 10:9a9ec143840b 45 _cols = 0x0D;
yoonghm 0:2df66331c109 46 if (therow == 0)
yoonghm 0:2df66331c109 47 c = 1;
yoonghm 0:2df66331c109 48 else {
gj_schoneveld 10:9a9ec143840b 49 _cols = 0x0B;
yoonghm 0:2df66331c109 50 if (therow == 0)
yoonghm 0:2df66331c109 51 c = 2;
yoonghm 0:2df66331c109 52 else
yoonghm 0:2df66331c109 53 c = 3;
yoonghm 0:2df66331c109 54 }
yoonghm 0:2df66331c109 55 }
yoonghm 0:2df66331c109 56 _input.call(row * 4 + c);
yoonghm 0:2df66331c109 57 Start(); // Re-energize all columns
yoonghm 0:2df66331c109 58 }
yoonghm 0:2df66331c109 59
gj_schoneveld 10:9a9ec143840b 60 void Keypad::_cbRow0Fall(void)
gj_schoneveld 10:9a9ec143840b 61 {
yoonghm 0:2df66331c109 62 _callback(0, _row0);
yoonghm 0:2df66331c109 63 }
gj_schoneveld 10:9a9ec143840b 64 void Keypad::_cbRow1Fall(void)
gj_schoneveld 10:9a9ec143840b 65 {
yoonghm 0:2df66331c109 66 _callback(1, _row1);
yoonghm 0:2df66331c109 67 }
gj_schoneveld 10:9a9ec143840b 68 void Keypad::_cbRow2Fall(void)
gj_schoneveld 10:9a9ec143840b 69 {
yoonghm 0:2df66331c109 70 _callback(2, _row2);
yoonghm 0:2df66331c109 71 }
gj_schoneveld 10:9a9ec143840b 72 void Keypad::_cbRow3Fall(void)
gj_schoneveld 10:9a9ec143840b 73 {
yoonghm 0:2df66331c109 74 _callback(3, _row3);
yoonghm 0:2df66331c109 75 }
yoonghm 0:2df66331c109 76
gj_schoneveld 10:9a9ec143840b 77 void Keypad::_setupFallTrigger(void)
gj_schoneveld 10:9a9ec143840b 78 {
gj_schoneveld 10:9a9ec143840b 79 _row0.fall(this, &Keypad::_cbRow0Fall);
gj_schoneveld 10:9a9ec143840b 80 _row1.fall(this, &Keypad::_cbRow1Fall);
gj_schoneveld 10:9a9ec143840b 81 _row2.fall(this, &Keypad::_cbRow2Fall);
gj_schoneveld 10:9a9ec143840b 82 _row3.fall(this, &Keypad::_cbRow3Fall);
gj_schoneveld 10:9a9ec143840b 83 }