Update portserial_m.c

add macro to aviod compile error with: rt_pin_mode(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_MODE_OUTPUT);

Update portserial_m.c
add macro to aviod compile error with: rt_pin_mode(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_MODE_OUTPUT);
eea0b9eb · shauew · GitHub · 361a1b24 · eea0b9eb
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components/net/freemodbus/port/portserial_m.c components/net/freemodbus/port/portserial_m.c +2 -0

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--- a/components/net/freemodbus/port/portserial_m.c
+++ b/components/net/freemodbus/port/portserial_m.c
@@ -57,7 +57,9 @@ BOOL xMBMasterPortSerialInit(UCHAR ucPORT, ULONG ulBaudRate, UCHAR ucDataBits,
     * set 485 mode receive and transmit control IO
     * @note MODBUS_MASTER_RT_CONTROL_PIN_INDEX need be defined by user
     */
+#if defined(RT_MODBUS_MASTER_USE_CONTROL_PIN)
    rt_pin_mode(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_MODE_OUTPUT);
+#endif

    /* set serial name */
    if (ucPORT == 1) {