topic Re: How to: KSDK-based Modbus RTU Packet Assembler in MQX in Kinetis Microcontrollers

How to: KSDK-based Modbus RTU Packet Assembler in MQX

dave408 — Sat, 26 Sep 2015 16:03:27 GMT

This is a document I created that outlines the process for getting a Kinetis processor to assemble Modbus RTU packets under KSDK 1.2 and MQX. Credit goes to mjbcswitzerland for sharing his uTasker approach to this problem.

Re: How to: KSDK-based Modbus RTU Packet Assembler in MQX

peterfurey — Fri, 16 Oct 2015 15:45:20 GMT

Hi Dave,

Thank you for posting this, I'm trying to do something similar and its been a frustrating process.

Was curious where you are declaring:

uint8_t rx_callback_buff[256]

and

g_rxbuff[]

Thanks,

Peter

Re: How to: KSDK-based Modbus RTU Packet Assembler in MQX

dave408 — Mon, 19 Oct 2015 18:04:00 GMT

Hi peterfurey, it doesn't *really* matter where you put those declarations. I have g_rxbuff[] in Events.c where my PIT ISRs reside. I put the rx_callback_buff[] declaration in my modbus listener class' implementation file.