Aslam Ahamed
/
PCF8574_I2C_4x4_Keypad
Hello World example for the PCF8574
Fork of PCF8574_HelloWorld by
main.cpp
- Committer:
- aslam
- Date:
- 2015-05-20
- Revision:
- 2:92715b8bee8f
- Parent:
- 1:873215cad8d2
File content as of revision 2:92715b8bee8f:
#include "mbed.h" #include "PCF8574.h" #define BAUD 9600 InterruptIn event(p12); Serial pc(USBTX, USBRX); PCF8574 io(p9,p10,0x40); int data1 , data2; void display(int data) { switch (data) { case 238: pc.printf("SW1 \n\r"); break; case 237: pc.printf("SW2 \n\r"); break; case 235: pc.printf("SW3 \n\r"); break; case 231: pc.printf("SW4 \n\r"); break; case 222: pc.printf("SW5 \n\r"); break; case 221: pc.printf("SW6 \n\r"); break; case 219: pc.printf("SW7 \n\r"); break; case 215: pc.printf("SW8 \n\r"); break; case 190: pc.printf("SW9 \n\r"); break; case 189: pc.printf("SW10 \n\r"); break; case 187: pc.printf("SW11 \n\r"); break; case 183: pc.printf("SW12 \n\r"); break; case 126: pc.printf("SW13 \n\r"); break; case 125: pc.printf("SW14 \n\r"); break; case 123: pc.printf("SW15 \n\r"); break; case 119: pc.printf("SW16 \n\r"); break; } } void trigger() { //event.fall(NULL); //printf("triggered!\n"); io.write(0x0f); data1 = io.read(); io.write(0xf0); data2 = io.read(); display(data1+data2); //wait(0.2); //event.fall(&trigger); } int main() { pc.printf("Start\n\r"); event.fall(&trigger); //event.rise(&trigger); while(1) { } }