问题描述
我有一个字符串数组,其中包含 16个十六进制值。我需要将它们转换为字节以将其写入Modbus的设备寄存器(每个寄存器的大小为16位)。我们有 8个寄存器,可以写入16个十六进制值。因此,我将它们转换为short,然后从short转换为byte,以便将其写入设备寄存器。
这是我的代码-
String[] advanceByte = { "00","00","07","46","01","02","03","00"};
short[] hexToShort = new short[16];
for (int i = 0; i < 16; i++) {
hexToShort[i] = Short.parseShort(advanceByte[i],16);
}
// Converting Integer to Byte
byte[] byteData = new byte[16];
for (int i = 0; i < advanceByte.length; i++) {
byteData`[i] = (byte) hexToShort[i];
}
for (int i = 0; i < byteData.length - 1;) {
byte[] byteArr1 = {(byte) byteData[i],(byte) byteData[i + 1]};
try {
trans = new ModbusSerialTransaction(serialConnection);
SimpleRegister myregister;
myregister = new SimpleRegister(byteArr1[0],byteArr1[1]);
writeSingleRegisterRequest = new WriteSingleRegisterRequest();
writeSingleRegisterRequest.setUnitID(slave_Address);
writeSingleRegisterRequest.setHeadless();
writeSingleRegisterRequest.setReference(ref2); //register number
myregister.setValue(byteArr1);
Register[] register = {myregister};
writeSingleRegisterRequest.setRegister(myregister);
trans.setRequest(writeSingleRegisterRequest);
trans.execute();
i = i + 2;
ref2++;
} catch (com.ghgande.j2mod.modbus.ModbusException exception) {
advancedStatus = false;
System.out.println("Table 4x4 data Writing Exception");
System.out.println("Exception Occured ----" + exception);
}
serialConnection.close();
}
每当我通过 QModMaster 从寄存器读取写入的数据时,前导零都将丢失。
需要帮助来解决此问题。
这是我从其他应用程序读取它们时的结果。结果,前导零缺失。 这是预期的结果。
解决方法
我在您的代码中唯一看到的错误是转换。我认为您应该避免进行String to Short
转换,尤其是当您可以直接转换hex to byte
时。
您应该已经做了类似的事情-
String[] advanceByte = { "00","00","07","46","01","02","03","00"};
byte[] byteData = new byte[16];
for (int i = 0; i < advanceByte.length; i++) {
byteData[i] = Byte.parseByte(advanceByte[i],16);
}
for (int i = 0; i < byteData.length - 1;) {
byte[] byteArr1 = {(byte) byteData[i],(byte) byteData[i + 1]};
try {
trans = new ModbusSerialTransaction(serialConnection);
SimpleRegister myregister;
myregister = new SimpleRegister(byteArr1[0],byteArr1[1]);
writeSingleRegisterRequest = new WriteSingleRegisterRequest();
writeSingleRegisterRequest.setUnitID(slave_Address);
writeSingleRegisterRequest.setHeadless();
writeSingleRegisterRequest.setReference(ref2); //register number
myregister.setValue(byteArr1);
Register[] register = {myregister};
writeSingleRegisterRequest.setRegister(myregister);
trans.setRequest(writeSingleRegisterRequest);
trans.execute();
i = i + 2;
ref2++;
} catch (com.ghgande.j2mod.modbus.ModbusException exception) {
advancedStatus = false;
System.out.println("Table 4x4 data Writing Exception");
System.out.println("Exception Occured ----" + exception);
}
serialConnection.close();
}
,
我唯一看到的是QModMaster程序没有显示前导零,而是正确传输了值
不要将值与其字符串表示形式混淆,Modbus会传输值而不是表示形式,然后可以将这些值显示为十六进制,十进制,二进制等。并且QModMaster作者决定不显示前导零。
您的问题应该从“我有一个包含16个字节值的十六进制表示形式的字符串数组”开始。