freemodbus implementation on AM335x starter kit

Deep Gadhia

Prodigy 130 points

Hello Friends,

I'm using AM335x starter kit. Currently I am working on implementation of freemodbus over uart port using rs485 .

Can any one guide me basic steps for getting port specific files?

over 11 years ago

0 Biser Gatchev-XID over 11 years ago

TI__Guru**** 393215 points

Hi,

You can check on http://www.freemodbus.org/

0 Deep Gadhia over 11 years ago in reply to Biser Gatchev-XID

Prodigy 130 points

Thank you for solution.
I had already checked http://www.freemodbus.org/ and run some demo examples but I wanted to do same for AM335x starter kit. so, In port layer I can use board specific files. I had also build serial drivers which include soft UART files. I don't know how to get these files and use them.

0 Biser Gatchev-XID over 11 years ago in reply to Deep Gadhia

TI__Guru**** 393215 points

I don't understand what you want to do. Can you explain in more details? What software are you using on the SK?

0 Deep Gadhia over 11 years ago in reply to Biser Gatchev-XID

Prodigy 130 points

I wants to use uart port configuration for my project. I am using ti-sdk-am335x-evm-06.00.00.00 sdk. For uart drivers I had build uImage using pru-am335x-pru-linux-drivers. How can I use freemodbus protocol on this BSP layer?

0 Biser Gatchev-XID over 11 years ago in reply to Deep Gadhia

TI__Guru**** 393215 points

The available documentation for PRU soft UARTs can be found here: http://processors.wiki.ti.com/index.php/Soft-UART_Implementation_on_AM335X_PRU_-_Software_Users_Guide#Running_the_Soft-UART_Sample_Application Is there any specific reason to use soft UARTs? The AM335X has 6 hardware UARTs, without need to use the PRU. For freemodbus usage you should search for documentation on their site. This is a third-party product which isn't supported by TI.

0 Deep Gadhia over 11 years ago in reply to Biser Gatchev-XID

Prodigy 130 points

Thank you for suggestion.
I had doubt to use uart without PRU. Now its clear. Can you tell me where I can find AM335x sK board UART code?

0 Ivan Matrakov over 11 years ago in reply to Deep Gadhia

TI__Expert 4475 points

Hi Deep,

In sdk6 you can find the uart drivers in <>/arch/arm/mach-omap2/serial.c and <>/drivers/tty/serial/omap-serial.c, but it's good to migrate to sdk7 or sdk8 because this sdk6 is very old.

Ivan

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freemodbus implementation on AM335x starter kit