420F Robot , RH System. Communication with RS232 device

[teknikjocke]

Hello all.

I have a question regarding my 420F robot , with RH system.

I would like the robot to communicate  with a RS232 device. I belive i have a com port on the CPU board , but I dont know how to program this. Anyone have any good ideas ? or perhaps any example programs to slove this ?

Thanks.

Teknikjocke

[teknikjocke]

No one with experience about this kind of problem ?

TeknikJocke

[BabakRobot]

Hi,

You can use file open with "p2:" name and read and write ability and you can write and read data with readfile and writefile commands.

Please test it.

[teknikjocke]

Hi everyone.


I have tested and managed to get the "write" command to work (i´m sending and recieving data from a system)

Does anyone have experience with the "read" command ? When i try to program it the same way as the "write" , the programs just halts on that line. What is the robot waiting for ? Do i have to specifie the message to "read" somewhere ?

Teknikjocke

[M.Fotovat]

Hi,
you need to have KFLOPPY software to emulate.

[teknikjocke]

M.Fotovat

Thanks for your reply.

Do I really need KFLOPPY to send and recieve data through the RS 232 port ? (The port on the board , not on the front  panel)

I know I need it when I copy and transfer programs etc , but in this application i'm only reading dand writing data (ASCII).

As I wrote , i have managed to write data thrugh the port , and I have no KFLOPPY in the recieving end. Im communicating with a ink printer.



Teknikjocke

[murrellr]

I believe the READ statement is blocking and buffered by default.  This is OK for files, but would cause a program to suspend, waiting for its input buffer to fill.  Its been a long time since I did serial communications in KAREL.  Take a look at the GET_PORT_ATTR and SET_PORT_ATTR builtins.  I believe you can turn off buffering and do look-ahead reads to see if there is anything to READ.