#include "mbed.h"

DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
Serial device(p9,p10);

// Circular buffers for serial TX and RX data - used by interrupt routines
const int buffer_size = 255;
// might need to increase buffer size for high baud rates
char tx_buffer[buffer_size];
char rx_buffer[buffer_size];

volatile int tx_in=0;
volatile int tx_out=0;
volatile int rx_in=0;
volatile int rx_out=0;
/*NVIC_EnableIRQ(UART1_IRQn);*/
void Tx_interrupt();
void Rx_interrupt();

int main() {

    device.baud(9600);
 
// Setup a serial interrupt function to receive data
    device.attach(&Rx_interrupt, Serial::RxIrq);
// Setup a serial interrupt function to transmit data
    device.attach(&Tx_interrupt, Serial::TxIrq);

NVIC_EnableIRQ(UART1_IRQn);

    while(1) {
    led3=1;
    wait(0.3);
    led3=0; 
    wait(0.3);
   
    }
}

void Rx_interrupt() { 
   
    led1=1;
    led3=0; 
    wait(0.2);
    led1=0;
    wait(0.2);
     
    
    }
void Tx_interrupt() {
    led2=1;
    wait(0.3);
    led2=0;
    return;
    }