data transmission based on ModBus Protocol

[AliBahar]

Hi friends
I want to create function which performs data communication based on Modbus Protocol using C programming (ANSI C).
I ll appreciate for any useful proposals and guidances.

 

[ud23]

https://www.modbus.org/docs/Modbus_over_serial_line_V1.pdf

 

[paulfjujo]

hello,

RTU or ASCII ?
Master or Slave (or both!) ?
RS232 or TCP/IP ?

some example on MikroE site..

i tested a Pic as master for an modbus 8 I/O +4EA slave interface.

Modicon PLC was (is ?) a reference for modbus application.

 

[AliBahar]

RTU or ASCII ?
Master or Slave (or both!) ?
RS232 or TCP/IP ?

you are right. I had to determine more specifications.
RTU, Master and Slave and rs232.
I want to create function which can be supportable with all micro-controllers and all C compilers.

 

[FvM]

I want to create function which can be supportable with all micro-controllers and all C compilers.

If "supportable" is aware of the need to write a platform specific wrapper for UART and particularly timer functions, this can work.

Did you already review the code links at modbus.org site? https://www.modbus.org/tech.php