Wenrui Meng / Mbed 2 deprecated ese519-hw2-part4

ese519 hw2 part 4

Dependencies:   keypad mbed

main.cpp@0:cfa060762ad7, 2015-02-17 (annotated)

Committer:
wenrui
Date:
Tue Feb 17 20:35:43 2015 +0000
Revision:
0:cfa060762ad7
Child:
1:e004fff01d0d
part4;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wenrui 0:cfa060762ad7 1 #include "mbed.h"
wenrui 0:cfa060762ad7 2
wenrui 0:cfa060762ad7 3 PwmOut buzzer(p21);
wenrui 0:cfa060762ad7 4 PwmOut speaker(p26);
wenrui 0:cfa060762ad7 5
wenrui 0:cfa060762ad7 6 Serial pc(USBTX, USBRX);
wenrui 0:cfa060762ad7 7 DigitalOut cols[4]= {p20,p19,p18,p17};
wenrui 0:cfa060762ad7 8 InterruptIn rows[4]={p25,p22,p23,p24};
wenrui 0:cfa060762ad7 9
wenrui 0:cfa060762ad7 10 double HZc[] = { 1209.0, 1336.0, 1477.0, 1633.0}; // Colum
wenrui 0:cfa060762ad7 11 double HZr[] = {697.0, 770.0, 852.0, 941.0}; //Row
wenrui 0:cfa060762ad7 12 char Keytable[] = { '1', '2', '3', 'A',
wenrui 0:cfa060762ad7 13 '4', '5', '6', 'B',
wenrui 0:cfa060762ad7 14 '7', '8', '9', 'C',
wenrui 0:cfa060762ad7 15 '*', '0', '#', 'D'
wenrui 0:cfa060762ad7 16 };
wenrui 0:cfa060762ad7 17
wenrui 0:cfa060762ad7 18 void start(int row){
wenrui 0:cfa060762ad7 19 double high = 0, low = 0;
wenrui 0:cfa060762ad7 20 if(rows[row].read() == 0) return;
wenrui 0:cfa060762ad7 21 for(int i = 0; i < 4; ++i){
wenrui 0:cfa060762ad7 22 cols[i].write(0);
wenrui 0:cfa060762ad7 23 if(rows[row].read() == 0){
wenrui 0:cfa060762ad7 24 high = HZc[i];
wenrui 0:cfa060762ad7 25 low = HZr[row];
wenrui 0:cfa060762ad7 26 pc.printf("input row %d col %d %c \n", row, i, Keytable[row * 4 + i]);
wenrui 0:cfa060762ad7 27 break;
wenrui 0:cfa060762ad7 28 }
wenrui 0:cfa060762ad7 29 }
wenrui 0:cfa060762ad7 30 buzzer.period(low);
wenrui 0:cfa060762ad7 31 speaker.period(high);
wenrui 0:cfa060762ad7 32 buzzer = 0.5;
wenrui 0:cfa060762ad7 33 speaker = 0.5;
wenrui 0:cfa060762ad7 34 }
wenrui 0:cfa060762ad7 35
wenrui 0:cfa060762ad7 36 void stop(){
wenrui 0:cfa060762ad7 37 buzzer.period(0);
wenrui 0:cfa060762ad7 38 speaker.period(0);
wenrui 0:cfa060762ad7 39 buzzer = 0;
wenrui 0:cfa060762ad7 40 speaker = 0;
wenrui 0:cfa060762ad7 41 for(int i = 0; i < 4; ++i) cols[i] = 1;
wenrui 0:cfa060762ad7 42 }
wenrui 0:cfa060762ad7 43
wenrui 0:cfa060762ad7 44
wenrui 0:cfa060762ad7 45
wenrui 0:cfa060762ad7 46 void row0Rise(){
wenrui 0:cfa060762ad7 47 start(0);
wenrui 0:cfa060762ad7 48 }
wenrui 0:cfa060762ad7 49 void row1Rise(){
wenrui 0:cfa060762ad7 50 start(1);
wenrui 0:cfa060762ad7 51 }
wenrui 0:cfa060762ad7 52 void row2Rise(){
wenrui 0:cfa060762ad7 53 start(2);
wenrui 0:cfa060762ad7 54 }
wenrui 0:cfa060762ad7 55 void row3Rise(){
wenrui 0:cfa060762ad7 56 start(3);
wenrui 0:cfa060762ad7 57 }
wenrui 0:cfa060762ad7 58
wenrui 0:cfa060762ad7 59 void rowFall(){
wenrui 0:cfa060762ad7 60 stop();
wenrui 0:cfa060762ad7 61 }
wenrui 0:cfa060762ad7 62
wenrui 0:cfa060762ad7 63 int main() {
wenrui 0:cfa060762ad7 64 rows[0].rise(&row0Rise);
wenrui 0:cfa060762ad7 65 rows[1].rise(&row1Rise);
wenrui 0:cfa060762ad7 66 rows[2].rise(&row2Rise);
wenrui 0:cfa060762ad7 67 rows[3].rise(&row3Rise);
wenrui 0:cfa060762ad7 68 for(int i = 0; i < 4; ++i) rows[i].fall(&rowFall);
wenrui 0:cfa060762ad7 69 while(1) {
wenrui 0:cfa060762ad7 70 ;
wenrui 0:cfa060762ad7 71 }
wenrui 0:cfa060762ad7 72 }