UART and MODBUS 232 material

[flowcode-developer]

Hello,
I am new here. I recently got Flowcode V10, professional license, and AVR chip pack. I was wondering where I can get info for UART and MODBUS 232. For now, I want to do something simple like sending a message from ATMEGA2560 to Docklight. I want them to communicate with each other. Wondering if you all have some resources that I can check out to get started? Thank you

[BenR]

Hello and welcome

Some examples can be found on our help wiki
https://www.flowcode.co.uk/wiki/index.p ... s:_System)

If you need something specific to get you started then let us know and we can maybe put something together for you.

[medelec35]

Hello.
Have you tried the wiki?
For example here for the modbus and here for the uart?

Edit Ben has beat me to it so apologies for any duplicated information.

[flowcode-developer]

Hello and welcome

Some examples can be found on our help wiki
https://www.flowcode.co.uk/wiki/index.p ... s:_System)

If you need something specific to get you started then let us know and we can maybe put something together for you.

I did see it. I like it but for me it is a bit overwhelming. I was looking for resources that breakdown as to how and why you would use the flow pieces in the case.

[flowcode-developer]

Hi so I tried out this code but something is not right. When I go to debug it shows that the UART is receiving but the COM is not sending. For the COM simulation I am using Docklight program. I have the settings correct BAUD 9600, no parity, 8 data bits, 1 stop bit. I think I am doing something wrong with my code? I would appreciate your help. I attached my code.

[mnfisher]

Hi,

There are several problems with your code: It is very difficult to 'catch' RS23s UART comms using ReceiveString (set timeout to 255) - it is much better to use an receive interrupt. Also the requested number of characters is undefined (in) - and 'in' is not altered by the call to ReceiveString. You'll need to save the returned string somewhere too.

A simple example - sorry for a different MCU, but it should need much changing apart from the target. I also just 'echo' the string back to the sender (PuTTY on my PC). One 'quirk' with FC is that Channel1 UART uses the Rx0 interrupt :-

rs232.fcfx

(14.08 KiB) Downloaded 336 times

Martin