Merge pull request #1747 from shauew/patch-1

Update portserial_m.c
2018-08-30 06:46:15 +08:00 · 2018-08-30 06:46:15 +08:00 · eada5059da
parent 361a1b2498 eea0b9ebf2
commit eada5059da
1 changed files with 2 additions and 0 deletions
--- 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) {