EthercatDevice_DmpHID.uartIs485()

[EthercatDevice_DmpHID_Generic]

描述

Check if the specified UART port of the EtherCAT slave device is in RS485 mode.

衍生類別：

語法

int uartIs485(int dev);

參數

• [in] int dev
  The specified UART port of the EtherCAT slave device.
  • 0 for COM1.
  • 1 for COM2.

回傳值

Return whether the specified UART port of the EtherCAT slave device is in RS485 mode.

• 1 means RS485.
• 0 means non-RS485.

If the return value is smaller than 0, it means an 錯誤代碼.

備註

This function must be called after a successful execution of EthercatMaster::begin(). This function is blocking and cannot be called within the Cyclic Callback.

範例

#include "Ethercat.h"

EthercatMaster master;
EthercatDevice_QECR11HU9S slave;

void setup() {
  Serial.begin(115200);
  
  master.begin();
  slave.attach(0, master);
  Serial.print("RS485 mode: ");
  Serial.println(slave.uartIs485(0));
}

void loop() {
  // ...
}

Please see EthercatDevice_DmpHID_Generic 類別 for more QEC HID slave instructions and API usage.