#include "mbed.h"

#if defined(TARGET_LPC1768)
#define UART_TX             p9
#define UART_RX             p10
#define FLOW_CONTROL_RTS    p30
#define FLOW_CONTROL_CTS    p29
#define RTS_CHECK_PIN       p8

#elif defined(TARGET_SAMR21G18A)
#define UART_TX             PA04
#define UART_RX             PA05
#define FLOW_CONTROL_RTS    PA06
#define FLOW_CONTROL_CTS    PA07
#define RTS_CHECK_PIN       PB03

#elif defined(TARGET_SAMD21J18A) /*USB debug port is not having RTS and CTS pins in expansion connectors in D21 Xplained Pro Board*/
#define UART_TX             PA22 /* Short this pin to PA04 */
#define UART_RX             PA23 /* Short this pin to PA05 */
#define FLOW_CONTROL_RTS    PA24
#define FLOW_CONTROL_CTS    PA25
#define RTS_CHECK_PIN       PB03

#elif defined(TARGET_SAMD21G18A) /*USB debug port is not having RTS and CTS pins in expansion connectors in W25 Xplained Pro Board*/
#define UART_TX             PA16 /* Short this pin to PB10 */
#define UART_RX             PA17 /* Short this pin to PB11 */
#define FLOW_CONTROL_RTS    PA18
#define FLOW_CONTROL_CTS    PA19
#define RTS_CHECK_PIN       PB03

#elif defined(TARGET_SAMG55J19) 
#define UART_TX             PA28 
#define UART_RX             PA27 
#define FLOW_CONTROL_RTS    PA31
#define FLOW_CONTROL_CTS    PA30
#define RTS_CHECK_PIN       PA18

#else
#error This test is not supported on this target
#endif

Serial pc(UART_TX, UART_RX);

#ifdef RTS_CHECK_PIN
InterruptIn in(RTS_CHECK_PIN);
DigitalOut led(LED1);
static void checker(void) {
  led = !led;
}
#endif

int main() {
    char buf[256];

    pc.set_flow_control(Serial::RTSCTS, FLOW_CONTROL_RTS, FLOW_CONTROL_CTS);
#ifdef RTS_CHECK_PIN
    in.fall(checker);
#endif
    while (1) {
        pc.gets(buf, 256);
        pc.printf("%s", buf);
    }
}