Search found 23 matches

Hi,

I have analyzed this code and right now I think that I understand it.

It goes like this:

MASTER

in send_start function we set modbus_serial_new=FALSE so it means that we are waiting f ...

Ok thanks a lot for answers,

In my system everybody uses exactly Modbus_over_serial_line_V1_02 spec so i will try to do it like it is described in this document.

I see the problem. The idea of t ...

hi,

thanks for answer. I see that during this 3,5Tz nothing is received by slave because line is in logic one during this time.

But how we handle this:
reset the receive state machine if a paus ...

Hello,

Can somebody explain me how we handle receiving this 3,5 length at front of ADU and at end of ADU?

if master sends request, at the beginning minimum 3,5 Tz should be sent, so how we handl ...

Ok i get it, so normally I don't even need 16 bit d value because it can be used if I want to operate in one 16 bit variable instead of two 8bit variables.

Tkats ok,

Can You explain me another t ...

Hi Ttelmah,

I understand what is union and for what is it but my question was a little different.

I asked for what is 16 bit variable modbus_serial_crc.d and not what is union Smile

in modbus.c ...

Hello,

can someone help me and explain for what is 16 bit variable modbus_serial_crc.d in modbus.c driver file?

modbus_serial_crc.b is used do calculate CRC code but where we use modbus_serial_c ...

I think that i gave too many questions at one time so nobody wants to answer it Smile

5) I get answer for this. In modbus_exception_rsp function in modbus.c file is added one bit in MSB "func|0x8 ...

are these bound ok or You are laughing at me beacuse they are unnecessary for some reason? Smile

hello,

I am trying to use modbus with my PIC16f628A microcontroller and I started to read and analyze example codes given from CCS modbus.c, ex_modbus_slave.

I have few questions about using som ...

Ok i created two functions and tested them on device, they works Smile

thanks for help

LCD array of 32 signs is located in RAM memory starting from 0x20

#define LCD_data_address 0x20

cha ...

Ok something I am doing wrong:

#define LCD_data_address 0x20
char LCDtext[32];
#locate LCDtext = LCD_data_address

int get_value(*(int8 *)(LCD_data_address + int off ...

Thanks a lot, I will try it in a moment Smile

Hello,

I am looking for some solution to my program. I am trying to write a LCD routine to display some text from specified RAM memory in a loop.

I want to allocate some array 2x16 int8 LCDtex ...

Why did you start a new thread on this issue? You've already got the the same problem being discussed in your original thread.

John

Hello John, this is not the same problem. this is another thin ...