Merge pull request #1747 from shauew/patch-1

Update portserial_m.c

Merge pull request #1747 from shauew/patch-1
Update portserial_m.c
eada5059 · Bernard Xiong · GitHub · 361a1b24 · eea0b9eb · eada5059
隐藏空白更改
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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) {