topic Re: twrk60f120m problem with ser-module in Kinetis Microcontrollers

twrk60f120m problem with ser-module

okaner — Sun, 16 Jun 2013 18:56:38 GMT

Hi.

I am newbei with tower modules. I am trying to use RS-485 port of TWR-SER module.

First I check the which UART module used for RS-485. then realised that same UART5 is used for also OSBDM/Serial Bridge.

For RS485 on TWR-SER --> "ELE_RX" and "ELE_TX" nets "A43" and "A44" pins on elevator connectors.

On TWRK60F120M --> "A43" and "A44" pins are connected to "PTE9" and "PTE8"

on TWRK60F120M --> "PTE9" and "PTE8" nets are also used for OSBDM.

Does it mean I cannot use OSBDM and serial port of TWR-SER module at the same time?

Re: twrk60f120m problem with ser-module

Kan_Li — Mon, 17 Jun 2013 05:47:34 GMT

There should be no problem using TWR-K60F120M with TWR-SER together, but if you want to use OSBDM as the console and TWR-SER as RS-485 port in the same time, you'd better use a different UART port to connect with the RS-485, otherwise , the data sent from MCU to OSBDM will also be transmitted thru the RS-485 port, that might interfere the 485 communication.

Re: twrk60f120m problem with ser-module

okaner — Mon, 17 Jun 2013 06:02:42 GMT

Thank you for your answer, Yes I want to use "OSBDM as the console and TWR-SER as RS-485 port at the same time". But they are both connected to UART5, If I dont miss something. How can I change TWR-SER RS485 UART port it is physically connected to "A43" and "A44" on TWR-SER, and this pins are UART5 on TWR-K60F120M. OSBDM as the console port is also UART5 on TWR-K60F120M.

Re: twrk60f120m problem with ser-module

Kan_Li — Mon, 17 Jun 2013 06:20:10 GMT

There are 3 jumps on the TWR-SER, you may connect other UART's TX, RX and RTS to the pin 3 of the jumps. Please refer to the following for details:

My suggestion is soldering 3 wires from PTB2(UART0_RTS) to pin3 of J18, from PTB17(/UART0_TX) to pin3 of J19, from PTB16(UART0_RX) to pin3 of J17. These 3 pins of PTB2/16/17 can be found from J3 on TWR-K60F120M.

Hope that helps,

B.R

Kan

Re: twrk60f120m problem with ser-module

okaner — Mon, 17 Jun 2013 10:55:53 GMT

Thank you, I was thinking of doing such a thing.

Re: twrk60f120m problem with ser-module

okaner — Mon, 17 Jun 2013 11:33:00 GMT

I want to ask one more thing. Lets say I want to use UART3. There are two RX and two TX for UARTs. For example

PTB10 -> UART3 RX

PTB11 -> UART3 TX

and also

PTC16 -> UART3 RX

PTC17 -> UART3 TX

How can I configure the rx and tx pins? Is there configuration file or somthing like this, I am using MQX 4.0.1

Thank you...

Re: twrk60f120m problem with ser-module

okaner — Mon, 17 Jun 2013 12:15:57 GMT

I found in "Freescale_MQX_4_0\mqx\source\bsp\twrk60f120m\init_gpio.c"

I think I should call this function _mqx_int _bsp_serial_io_init(uint_8 dev_num, uint_8 flags);

Re: twrk60f120m problem with ser-module

Kan_Li — Tue, 18 Jun 2013 01:27:55 GMT

Yes, that is the right place to change the pin assignment for serial port.

Re: twrk60f120m problem with ser-module

coryf — Wed, 17 Dec 2014 23:13:27 GMT

I kept banging my head against the wall tying to find the software bug in my code that didn't exist. My project requires 2 UART interfaces (one for the machine and one for debug), I too was using the TWR-K60 kit. I don't understand why Freescale would make the OSBDM and TWR-SER share the same UART interface... Anyway I got the parts below from DigiKey and made a little patch cable! This article helped me figure out my problem so I figured I might help the next guy who is looking for the parts to do the job.

Qty PN

1 > SFSD-10-28-H-10.00-SR ($7.86ea)

3 > PPPC031LFBN-RC ($0.49ea)