diff options
| -rw-r--r-- | components/net/freemodbus/port/portserial_m.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/components/net/freemodbus/port/portserial_m.c b/components/net/freemodbus/port/portserial_m.c index eb50cf51d3..f68794a617 100644 --- a/components/net/freemodbus/port/portserial_m.c +++ b/components/net/freemodbus/port/portserial_m.c @@ -130,12 +130,16 @@ void vMBMasterPortSerialEnable(BOOL xRxEnable, BOOL xTxEnable) /* enable RX interrupt */ serial->ops->control(serial, RT_DEVICE_CTRL_SET_INT, (void *)RT_DEVICE_FLAG_INT_RX); /* switch 485 to receive mode */ +#if defined(RT_MODBUS_MASTER_USE_CONTROL_PIN) rt_pin_write(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_LOW); +#endif } else { /* switch 485 to transmit mode */ +#if defined(RT_MODBUS_MASTER_USE_CONTROL_PIN) rt_pin_write(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_HIGH); +#endif /* disable RX interrupt */ serial->ops->control(serial, RT_DEVICE_CTRL_CLR_INT, (void *)RT_DEVICE_FLAG_INT_RX); } |