topic Re: Flexcan example on tower K60 in Kinetis Microcontrollers

Flexcan example on tower K60

Abhitechmania — Wed, 09 Nov 2011 09:13:36 GMT

Hello all,

I have just started trying the tower system (K60) for Keil development environment. I have successfully used UART on SER but I am facing problems with CAN on SER board. The keil has successfully built the flexcan example. I have also made necessary jumper changes on SER (shunting between 5-6 and 7-8). The terminal utilty also shows that data is being transmitted

"Data transmit: 1

FLEXCAN tx update message. result: 0x0"

But I dont see any activity on pin 1 and 3 of J7 using oscilloscope.

Could you help out with this.

Thanks in advance,

Abhinav

Re: Flexcan example on tower K60

LuisCasado — Wed, 09 Nov 2011 10:44:29 GMT

Hello,

What project are you running?

Best Regards,

Luis

Re: Flexcan example on tower K60

Abhitechmania — Wed, 09 Nov 2011 10:58:18 GMT

example flexcan from \mqx\examples\can directory.

Kind regards,

Abhinav

Re: Flexcan example on tower K60

LuisCasado — Wed, 09 Nov 2011 23:22:32 GMT

Hello,

I think the example needs an external CAN node. Try the attached example implementing loopback mode for testing.

Luis

Re: Flexcan example on tower K60

Abhitechmania — Thu, 10 Nov 2011 10:25:24 GMT

Thanks Luis, It works fine. I have few more questions

1. Does the can message is available on J7 pin 1 &3 in loopback mode?

2. Can you tell me the setting of jumpers of tower(K60) and SER and other settings to get flexcan running? I will use can analyzer from vector (http://www.vector.com/vi_cancardxl_en.html) .

Regards,

Abhinav

Re: Flexcan example on tower K60

Abhitechmania — Tue, 15 Nov 2011 10:12:11 GMT

has anyone got flexcan demo working? I donot get any output from J7 pin 1 and 3. The program is running fine in debug mode but there is no signal on J7.

Re: Flexcan example on tower K60

LuisCasado — Tue, 15 Nov 2011 21:12:41 GMT

Re: Flexcan example on tower K60

LuisCasado — Wed, 16 Nov 2011 10:49:50 GMT

Hello,

Can you measure activity in pin 1 C_TXD (TJA1050)?

Best Regards,

Re: Flexcan example on tower K60

Abhitechmania — Wed, 16 Nov 2011 11:37:27 GMT

no, there is no acitvity on pin 1 C_TXD (TJA1050) also. It gives an constant voltage of 3.3 volts. I tried the same demo but with code warrior but still nothing. Is there any hardware bug in the tower system ? FYI, I have

TWR-K60: 700-26548 REV A & SCH-

26548 REV C

Regards,

Abhinav

Re: Flexcan example on tower K60

LuisCasado — Wed, 16 Nov 2011 11:44:00 GMT

Hi,

As far as I know, No. Check the IOMUX configuration for CAN pins.

Recheck you are using CAN1 interface in the PTE24, PTE25 pins and also check pin B42 in the elevator.

Best Regards,

Re: Flexcan example on tower K60

Abhitechmania — Tue, 22 Nov 2011 08:54:28 GMT

Thanks Luis,

I did not see an errata for CAN. Now that I incorporated it worked fine. One thing more Contrary to what is mentioned in user manual, pin 1-2 of J7 should be shunted to activate the can driver IC.

Kind regards,

Abhinav

Re: Flexcan example on tower K60

Abhitechmania — Fri, 25 Nov 2011 09:38:06 GMT

srry its J5..

Re: Flexcan example on tower K60

LANCO_M4 — Sat, 03 Dec 2011 11:21:19 GMT

I think I am haivng the same problem with my tower. Is there a solution? I am little confused by the statement "Now that I incorporated it worked fine" what was incorporated?

Re: Flexcan example on tower K60

unmannedrussery — Thu, 26 Jan 2012 00:31:35 GMT

Abhinav or others... Did you ever get a specific solution to this problem? I've been playing around with the FlexCAN demo all day on MQX 3.8 without any success. As others have commented, the terminal output is pretty unhelpful... it says that setup succeeded and that the message is transmitting correctly:

*********FLEXCAN TEST PROGRAM.*********
Message format: Standard (11 bit id)
Message buffer 0 used for Tx and Rx.
Interrupt Mode: Enabled
Operation Mode: TX and RX --> Normal
***************************************

selected frequency (Kbps) is: 125
Data length: 1
FLEXCAN reset. result: 0x0
FLEXCAN initilization. result: 0x0
FLEXCAN mode selected. result: 0x0
FLEXCAN global mask. result: 0x0
FLEXCAN Error ISR install, result: 0x0
FLEXCAN Bus off ISR install, result: 0x0
FLEXCAN error interrupt enable. result: 0x0
FLEXCAN rx remote mailbox initialization. result: 0x0
FLEXCAN rx mailbox initialization. result: 0x0
FLEXCAN mailbox activation. result: 0x0
FLEXCAN RX ISR install. result: 0x0
FLEXCAN RX remote ISR install. result: 0x0
FLEXCAN tx remote mailbox initialization. result: 0x0
FLEXCAN tx mailbox initialization. result: 0x0
FLEXCAN tx mailbox activation. result: 0x0
FLEXCAN TX ISR install. result: 0x0
FLEXCAN TX remote ISR install. result: 0x0
FLEXCAN started. result: 0x0
Data transmit: 0
Data transmit: 1
FLEXCAN tx update message. result: 0x0
Data transmit: 2
FLEXCAN tx update message. result: 0x0
Data transmit: 3
FLEXCAN tx update message. result: 0x0

I think the software end of it is working correctly, as I'm able to see the message data increment in the mailbox register (0x400A_4058) if I view memory while running the code. I've tried putting a logic analyzer on pin 42 of the A-side expansion port, but the signal doesn't change (sampled at 1MHz for 5 seconds) and the bus just stays high.

I've established that the CAN transceiver works correctly by stimulating pins 1 and 3 of J7 on the TWR-SER with a CAN-USB module. I'm able to view the data stream on the A-side expansion port, Pin 41 (CAN_RX). However, the FlexCAN demo code doesn't acknowledge receipt of the message (sent with message id 0x123).

Are there any known issues with the TWR-K60N512 or TWR-SER that would prevent the FlexCAN demo from working out of the box? I've tried the following with no success:

- K60 Mask set 0M33Z errata fix e2583, by placing "OSC_CR |= OSC_CR_ERCLKEN_MASK;" at line 333 of kflexcan.c.

- Shorting pins 1-2 of J7, as suggested by Abhinav.

Any advice or experience would be greatly appreciated!!

Robert

Re: Flexcan example on tower K60

unmannedrussery — Thu, 26 Jan 2012 02:34:06 GMT

Update... FIXED!

The problem is with the TWR SER jumper setup specified in TWRSERUM.pdf (or at least my interpretation of that setup). The table for J5 says shorting pins 1-2 "Put[s] CAN transceiver into sleep mode". This is actually incorrect.

Installing this jumper connects the "S" pin on the transceiver to ground, which puts the transceiver into normal operation or high speed mode (see pg. 4 of the datasheet http://www.nxp.com/documents/data_sheet/TJA1050.pdf).

So for this demo to work, you must short pins 1-2 of J5 on the TWR SER board. I had tried this earlier, but was doing it with a loose piece of wire (I'm short on 0.1" jumpers), and must not have had the two pins shorted effectively.

Regards,

-Robert

Re: Flexcan example on tower K60

Abhitechmania — Mon, 06 Feb 2012 15:34:13 GMT

I mistakenly wrote pins 1-2 of J7. It should be pins 1-2 of J5 (see reply next to that). A nice explanation is given by Robert in the latest message.

Re: Flexcan example on tower K60

sruthyuk — Thu, 01 Oct 2015 05:45:23 GMT

Hi friend

Could you please post the example code for testing flexcan by enabling loop back mode used in TWR-K60F120M and the steps for testing CAN?? I have been trying to test the flexcan1 using can_loopback_node codeflexcan testing in TWR-K60F120M by writing a character through uart5 and reading it in the console, but have no ideas yet now. Also tell the jumper setings in TWR SER and pins in elevator you have used.

With Regards

Sruthy uk

Re: Flexcan example on tower K60

sruthyuk — Thu, 26 Nov 2015 10:59:24 GMT

Hi Luis,

Did you tested CAN communication between two tower boards or between two CAN module in MK60F512 tower board??Is there any sample code for testing CAN communication in KDS2.0??

With regards,

sruthy uk

Re: Flexcan example on tower K60

LuisCasado — Thu, 26 Nov 2015 11:43:14 GMT

Hello,

Between two [TWR-K60 + TWR-SER]

Code is for MQX and MQX 4.2 supports KDS. So you should be able to run the same code.

Best Regards,

Luis

Re: Flexcan example on tower K60

sruthyuk — Sat, 05 Dec 2015 15:26:48 GMT

Hi,

But this code is for MQX project. This code cant be used in my project.

with regards

sruthy uk