keypad test for the CORE-1000
Dependencies: mbed
main.cpp@4:3f409a9fadf9, 2017-02-03 (annotated)
- Committer:
- odb
- Date:
- Fri Feb 03 07:55:34 2017 +0000
- Revision:
- 4:3f409a9fadf9
- Parent:
- 2:b60cb847489c
CORE-1000 First
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
screamer | 0:005629fe3609 | 1 | #include "mbed.h" |
screamer | 0:005629fe3609 | 2 | |
odb | 4:3f409a9fadf9 | 3 | DigitalOut clkout(PA_8); |
odb | 4:3f409a9fadf9 | 4 | DigitalIn keyin(PB_4 ); |
odb | 4:3f409a9fadf9 | 5 | |
odb | 4:3f409a9fadf9 | 6 | int oldkey; |
odb | 4:3f409a9fadf9 | 7 | |
odb | 4:3f409a9fadf9 | 8 | int getkey(void) |
odb | 4:3f409a9fadf9 | 9 | { |
odb | 4:3f409a9fadf9 | 10 | int cnt; |
odb | 4:3f409a9fadf9 | 11 | int num = 0; |
odb | 4:3f409a9fadf9 | 12 | for(cnt = 1; cnt < 17; cnt++) |
odb | 4:3f409a9fadf9 | 13 | { |
odb | 4:3f409a9fadf9 | 14 | clkout = 0; |
odb | 4:3f409a9fadf9 | 15 | if(keyin == 0) |
odb | 4:3f409a9fadf9 | 16 | num = cnt; |
odb | 4:3f409a9fadf9 | 17 | clkout = 1; |
odb | 4:3f409a9fadf9 | 18 | } |
odb | 4:3f409a9fadf9 | 19 | return num; |
odb | 4:3f409a9fadf9 | 20 | } |
screamer | 0:005629fe3609 | 21 | |
screamer | 0:005629fe3609 | 22 | int main() { |
screamer | 0:005629fe3609 | 23 | while(1) { |
odb | 4:3f409a9fadf9 | 24 | int newkey = getkey(); |
odb | 4:3f409a9fadf9 | 25 | printf("key pressed = %d \n\r", newkey); |
odb | 4:3f409a9fadf9 | 26 | oldkey = newkey; |
odb | 4:3f409a9fadf9 | 27 | wait(0.2); |
screamer | 0:005629fe3609 | 28 | } |
screamer | 0:005629fe3609 | 29 | } |