File content as of revision 1:6926cb0de2b0:

#include "mbed.h"

 
 #include "hal/i2c_api.h"
 #include "platform/SingletonPtr.h"
 #include "platform/PlatformMutex.h"
 //#include "platform/NonCopyable.h"
 
 #if DEVICE_I2C_ASYNCH
 #include "platform/CThunk.h"
 #include "hal/dma_api.h"
 #include "platform/FunctionPointer.h"
 #endif 
// Read temperature from LM75BD

I2C Master(PC_9, PA_8);
Serial pc(USBTX,USBRX); 
const int addr = 0xA0;

int main() {
    char cmd[2];
    char buffer[20];
    char slave_buffer[20];
    char msg[] = "Hi 0xA0";
    char msg_all[] = "Slave!";
    while (1) {
                
        if(pc.readable()) {
            pc.gets(buffer, sizeof(buffer));
            pc.printf("buffer : %s\n",buffer);
            if(buffer[0]!='\0'|| buffer[0]!='\r'|| buffer[0]!='\n'||buffer!='\0'){
                int i=atoi(buffer);
                switch (i) {
                    case I2C::MasterGeneralCall:
                        //write(int address, const char *data, int length, bool repeated = false);
                        Master.write(addr, msg_all, strlen(msg_all) + 1, false); // Includes null char
                        printf("write msg_all G: %s\n", msg_all);
                    break;
                    case I2C::MasterWrite:
                        Master.write(addr, msg, strlen(msg) + 1, false);
                        printf("write msg to A: %s\n", msg);
                    break;
                    case I2C::MasterRead:
                        Master.read(addr,slave_buffer, 20);
                        printf("Read A: %s\n", slave_buffer);
                    break;
                }
            
            }
            for(int i = 0; i < 10; i++) buffer[i] = 0;    // Clear buffer
        }
    }
}