ModbusTCP undefined reference to delayMicroseconds

[bungernaut]

I am trying get the EthernetModbusServerLED example to run on the Teensy4.1.
The example code is included in the ModbusTPC library: https://github.com/arduino-libraries...verLED.ino#L16
The only change I think is required is this line to NativeEthernet.h
I am using v1.0.5 of ArduinoModbus and have tried other versions.

The compilation errors on
C:\Users\bung\Documents\Arduino\libraries\ArduinoM odbus\src\libmodbus/modbus.c:162: undefined reference to `delayMicroseconds'

In file included from C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\ModbusRTUClient.cpp:27:0:
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\ModbusRTUClient.h: In constructor 'ModbusRTUClientClass::ModbusRTUClientClass(RS485Class&)':
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\ModbusRTUClient.h:44:25: warning: 'ModbusRTUClientClass::_rs485' will be initialized after [-Wreorder]
   RS485Class* _rs485 = &RS485;
                         ^
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\ModbusRTUClient.cpp:35:36: warning:   base 'ModbusClient' [-Wreorder]
   _rs485(&rs485), ModbusClient(1000)
                                    ^
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\ModbusRTUClient.cpp:34:1: warning:   when initialized here [-Wreorder]
 ModbusRTUClientClass::ModbusRTUClientClass(RS485Class& rs485) :
 ^
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\libmodbus\modbus.c: In function '_sleep_response_timeout':
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\libmodbus\modbus.c:161:5: warning: implicit declaration of function 'delay' [-Wimplicit-function-declaration]
     delay(ctx->response_timeout.tv_sec * 1000);
     ^
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\libmodbus\modbus.c:162:5: warning: implicit declaration of function 'delayMicroseconds' [-Wimplicit-function-declaration]
     delayMicroseconds(ctx->response_timeout.tv_usec);
     ^
C:\Users\bung\AppData\Local\Temp\arduino_build_329130\libraries\ArduinoModbus\libmodbus\modbus.c.o: In function `_sleep_response_timeout':
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\libmodbus/modbus.c:162: undefined reference to `delayMicroseconds'
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\libmodbus/modbus.c:162: undefined reference to `delayMicroseconds'
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\libmodbus/modbus.c:162: undefined reference to `delayMicroseconds'
C:\Users\bung\Documents\Arduino\libraries\ArduinoModbus\src\libmodbus/modbus.c:162: undefined reference to `delayMicroseconds'
collect2.exe: error: ld returned 1 exit status
Error compiling for board Teensy 4.1.

Here is the offending line https://github.com/arduino-libraries.../modbus.c#L162

[PaulStoffregen]

It's a bug in ArduinoModbus. Here's a fixed copy.

https://github.com/PaulStoffregen/ArduinoModbus

[bungernaut]

Confirmed, thanks!