Seeed Arch Max
STM32F407VET6
TARGET_ARCH_MAX
/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F4/TARGET_STM32F407VG

ST Nucleo F411RE
STM32F411RET6 
TARGET_NUCLEO_F411RE

ST Nucleo F446RE
STM32F446RET6
TARGET_NUCLEO_F446RE

LPCXpresso4337
NXP LPC4337 Cortex-M4
TARGET_LPC4337

DISCO-F746NG
TARGET_DISCO_F746NG

    printf("\r\nTarget   : ");
#if defined(TARGET_NUCLEO_F411RE)
    printf("NUCLEO F411RE\r\n");
#elif defined(TARGET_NUCLEO_F446RE)
    printf("NUCLEO F446RE\r\n");
#elif defined(TARGET_ARCH_PRO)
    printf("Seeed Arch PRO\r\n");
#elif defined(TARGET_ARCH_MAX)
    printf("Seeed Arch Max\r\n");
#elif defined(TARGET_LPC4337)
    printf("LPC4337\r\n");
#elif defined(TARGET_DISCO_F746NG)
    printf("DISCO_F746NG\r\n");
#else
    printf("Unknown\r\n");
#endif

LEDs on LPCXpresso4337:
DigitalOut myledR(LED1);
DigitalOut myledG(P2_7);
DigitalOut myledB(LED2);


#if defined TARGET_NUCLEO_F411RE
Serial pc(D1, D0);  // tx, rx, Nucleo F411RE
#elif defined(TARGET_ARCH_MAX)
Serial pc(D6, D7);  // tx, rx, Arch Max
#elif defined(TARGET_LPC4337)
Serial pc(P2_10, P2_11); // TX, RX
#else
Serial pc(USBTX, USBRX);
#endif