Revision 0:cfa060762ad7, committed 2015-02-17
- Comitter:
- wenrui
- Date:
- Tue Feb 17 20:35:43 2015 +0000
- Child:
- 1:e004fff01d0d
- Commit message:
- part4;
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/keypad.lib Tue Feb 17 20:35:43 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/yoonghm/code/keypad/#da060f8c03e8
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Feb 17 20:35:43 2015 +0000
@@ -0,0 +1,72 @@
+#include "mbed.h"
+
+PwmOut buzzer(p21);
+PwmOut speaker(p26);
+
+Serial pc(USBTX, USBRX);
+DigitalOut cols[4]= {p20,p19,p18,p17};
+InterruptIn rows[4]={p25,p22,p23,p24};
+
+double HZc[] = { 1209.0, 1336.0, 1477.0, 1633.0}; // Colum
+double HZr[] = {697.0, 770.0, 852.0, 941.0}; //Row
+char Keytable[] = { '1', '2', '3', 'A',
+ '4', '5', '6', 'B',
+ '7', '8', '9', 'C',
+ '*', '0', '#', 'D'
+ };
+
+void start(int row){
+ double high = 0, low = 0;
+ if(rows[row].read() == 0) return;
+ for(int i = 0; i < 4; ++i){
+ cols[i].write(0);
+ if(rows[row].read() == 0){
+ high = HZc[i];
+ low = HZr[row];
+ pc.printf("input row %d col %d %c \n", row, i, Keytable[row * 4 + i]);
+ break;
+ }
+ }
+ buzzer.period(low);
+ speaker.period(high);
+ buzzer = 0.5;
+ speaker = 0.5;
+}
+
+void stop(){
+ buzzer.period(0);
+ speaker.period(0);
+ buzzer = 0;
+ speaker = 0;
+ for(int i = 0; i < 4; ++i) cols[i] = 1;
+}
+
+
+
+void row0Rise(){
+ start(0);
+}
+void row1Rise(){
+ start(1);
+}
+void row2Rise(){
+ start(2);
+}
+void row3Rise(){
+ start(3);
+}
+
+void rowFall(){
+ stop();
+}
+
+int main() {
+ rows[0].rise(&row0Rise);
+ rows[1].rise(&row1Rise);
+ rows[2].rise(&row2Rise);
+ rows[3].rise(&row3Rise);
+ for(int i = 0; i < 4; ++i) rows[i].fall(&rowFall);
+ while(1) {
+ ;
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld Tue Feb 17 20:35:43 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/9ad691361fac
\ No newline at end of file
Wenrui Meng
