TCP server example

[gianca...@gmail.com]

I have read the documentation and consult the examples (bandwitch-server-one.c) but there is something that I don't understand (my english is not good and google help me ... :) ).

How/when should I use the values ​​of my registers in library code?

My program manages 3 sets of registers

0-1000

5000-7000

10000-12000

all contain 2 bytes, reading and writing.

I understand that

1) I have to create a ctx = modbus_new_tcp ("127.0.0.1", 1502);

2) I put the socket in listen state socket = modbus_tcp_listen (ctx, 1);

3) I wait for accept connection modbus_tcp_accept (ctx, & s);

4) I allocate mb_mapping  mb_mapping = 

 modbus_mapping_new (MODBUS_MAX_READ_BITS, 0,

                                    MODBUS_MAX_READ_REGISTERS, 0);

5) Receive the request rc = modbus_receive (ctx, query);

6) Respond with modbus_reply (ctx, query, rc, mb_mapping);

7) Free the resources

ok? But when/where should  I use the values of my registers ​​0-1000 / 5000-7000 etc.?

I'm sure this is a stupid question, thank you for your time

[gianca...@gmail.com]

I read another example (unit-test-server.c), the solution is in mb_mapping->XXX

  /* Initialize values of INPUT REGISTERS */

    for (i=0; i < UT_INPUT_REGISTERS_NB; i++) {

        mb_mapping->tab_input_registers[i] = UT_INPUT_REGISTERS_TAB[i];;

[Stéphane Raimbault]

Yes you can access the data via mb_mapping->tab_input_registers pointer. The documentation isn't very clear on that subject.

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