picc/driver/modbus.c

[Guest]

Hello all,

I tried to use Modbus.C provided in the driver folder.
I used the wizard, to create A master and a slave project.

I encountered many problems , i wonder if as there is no example of using this library, it is or not good ?

minor problem ! :

for exemple the wizard generates some
fprintf(PC," text");

that means that you have to declare another useRS232 using other pins than the ones used for rs485 . but in modbus .c the rs485 is delcared like this

#use rs232(baud=MODBUS_SERIAL_BAUD, xmit=MODBUS_SERIAL_TX_PIN, rcv=MODBUS_SERIAL_RX_PIN, parity=N , force_sw , stream=MODBUS_SERIAL)

and the force_sw flag cannot allow you to declare another users232

Major Problem

for my slave i do not use the Int Interrupts.
By llookng the modbus.c looks like SLave check for incoming messages in int_timer2.

but i cannot find anywhere an enable_interrupts( timers2)

so i wonder if this code libary has een tested , or i simply should not be in the directory?

( by the way i guess the master works fine , i sends something on the RS485 bus, ( i check with an oscilloscope ) )