getResponseBuffer()
描述
讀取 ModbusMasterNode
類別中的私有陣列 readData
的數值。
readData
是使用 Read 功能碼讀回 Slave 裝置暫存器後存放的陣列。
語法
node1.getResponseBuffer(index, mode)
參數
node1
: ModbusMasterNode
物件。
index
: readData
陣列的索引值。
mode
:從 readData
陣列中讀取數據的模式,其引數為 MODBUS_DATAMODE_BIT
或 MODBUS_DATAMODE_UINT16
,若不給予引數將預設為 MODBUS_DATAMODE_UINT16
。
回傳
int
:從 readData
陣列中取出的數值,錯誤則回傳 0xFFFF 。
範例
#include <Modbus86.h> ModbusMaster bus1; ModbusMasterNode node1; uint8_t result; uint32_t receiveData; void setup() { while(!Serial); Serial1.begin(115200); bus1.begin(MODBUS_RTU, Serial1); node1.attach(16, bus1); result = node1.readCoils(5, 2); if (result != MODBUS_SUCCESS) { Serial.print("readCoils => ErrorCode: "); Serial.println(result); } else { Serial.print("From Coil Status receiveData: "); receiveData = node1.getResponseBuffer(0) | (node1.getResponseBuffer(1) << 16); Serial.println(receiveData); } } void loop() { }
See Also
- clearResponseBuffer()
- readCoils()
- readDiscreteInputs()
- readHoldingRegisters()
- readInputRegisters()
- readWriteMultipleRegisters()
The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.