File content as of revision 119:d879334e3d87:

#include "mbed.h"
#include <string.h>

RawSerial pc(PA_2, PA_3, 115200); // USART2
//Serial pc(USBTX, USBRX);
//RawSerial phone(PA_10, PA_9, 115200);
DigitalOut rLed(D3);
DigitalOut gLed(D4);

char buf[256];
int index = 0;

void rx_handler(void) {
    int ch = pc.getc();
    pc.putc(ch);
//    phone.putc(ch);
    
    if(ch == 0x0D) {
                while(!pc.writeable());
                pc.putc(0x0A);
//                phone.putc(0x0A);
                
                if(strcmp(buf,"Rled on") == 0) {
                    rLed = 1;
                    pc.printf("Rled status: %s\r\n", "on");
//                    phone.printf("Rled status: %s\r\n", "on");
                    
                } else if(strcmp(buf,"Rled off") == 0){
                    rLed = 0;
                    pc.printf("Rled status: %s\r\n", "off");
//                    phone.printf("Rled status: %s\r\n", "off");
                    
                } else if(strcmp(buf,"Rled status") == 0){
                    pc.printf("Rled status: %s\r\n", rLed? "on" : "off");
//                    phone.printf("Rled status: %s\r\n", rLed? "on" : "off");
                    
                } else if(strcmp(buf,"Gled on") == 0) {
                    gLed = 1;
                    pc.printf("Gled status: %s\r\n", "on");
//                    phone.printf("Gled status: %s\r\n", "on");
                    
                } else if(strcmp(buf,"Gled off") == 0){
                    gLed = 0;
                    pc.printf("Gled status: %s\r\n", "off");
//                    phone.printf("Gled status: %s\r\n", "off");
                    
                } else if(strcmp(buf,"Gled status") == 0){
                    pc.printf("Gled status: %s\r\n", gLed? "on" : "off");
//                    phone.printf("Gled status: %s\r\n", gLed? "on" : "off");
                    
                } else {
                    pc.printf("Undefined command\r\n");
//                    phone.printf("Undefined command\r\n");
                }
                strncpy(buf,"",index);
                index = 0;
    } else {
    
        buf[index] = ch;
        index ++;
    }
            
}
int main() {
    
    strcpy(buf,"");
    
    pc.attach(&rx_handler);
    pc.printf("\r\n Welcome to UART Lab_3_4!\r\n");
    pc.printf("Enter 'Rled/Gled on/off/status'\r\n");
    
//    phone.attach(&rx_handler);
//    phone.printf("\r\n Welcome to UART Lab_3_4!\r\n");
//    phone.printf("Enter 'Rled/Gled on/off/status'\r\n");
    
    while(true) {
    }
}