topic Re: TRK-KEA128 only communicating one way in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/TRK-KEA128-only-communicating-one-way/m-p/640985#M38821 <HTML><HEAD></HEAD><BODY><P>Hi</P><P></P><P>First of all, sorry for the later reply.</P><P></P><P>I had tested your code with two TRK-KEA128 board without any problem.</P><P>Please check attached video for the detailed info.</P><P>Below is TRK-KEA128 CAN PHY schematics, please check the STB_CAN pin voltage (it must be in low voltage, otherwise the CAN communication couldn't work)</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/13919iC52BD23BF1AD05B2/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P><BR />Wish it helps.</P><P></P><P>Have a great day,<BR />Ma Hui<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 09 Feb 2017 06:25:25 GMT Hui_Ma 2017-02-09T06:25:25Z TRK-KEA128 only communicating one way https://community.nxp.com/t5/Kinetis-Microcontrollers/TRK-KEA128-only-communicating-one-way/m-p/640984#M38820 <HTML><HEAD></HEAD><BODY><P>I have two microcontollers programmed such that when you press a button on one, it will send a message to the other to turn on a light. The message is sent via an interrupt on the button, but the communication only works one way. As in, if I set them both up to run, I can press the buttons on MCU 1 to turn on the lights on the MCU 2, but when I press the button on MCU 2, the light will not turn on on MCU 1. In fact, whichever MCU I press the button on first after running will work until I press a button on the other MCU, then the communication no longer works in either direction.</P><P style="min- padding: 0px;">&nbsp;</P><P><span class="lia-inline-image-display-wrapper" image-alt="175105_175105.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/122779i107556749749B94C/image-size/large?v=v2&amp;px=999" role="button" title="175105_175105.png" alt="175105_175105.png" /></span><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_3.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/12281i2950D192B10E5F9D/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_3.png" alt="pastedImage_3.png" /></span></P><P>I have a breakpoint set shortly after the MCU receives the message, and it will always stop at this breakpoint after pressing a button on the other MCU... but once I press a button on the receiving MCU, neither MCU will break after a button is pressed. I don't know if there is possibly a problem with the initial hardware setup before my code runs, but does anyone have an idea of why the message can only be distributed one direction?</P><P style="min- padding: 0px;">&nbsp;</P><P>My project is attached below:</P><P style="min- padding: 0px;">&nbsp;</P><P>Thank you,</P><P>Tyler</P></BODY></HTML> Tue, 24 Jan 2017 20:46:35 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/TRK-KEA128-only-communicating-one-way/m-p/640984#M38820 tylertrigg 2017-01-24T20:46:35Z Re: TRK-KEA128 only communicating one way https://community.nxp.com/t5/Kinetis-Microcontrollers/TRK-KEA128-only-communicating-one-way/m-p/640985#M38821 <HTML><HEAD></HEAD><BODY><P>Hi</P><P></P><P>First of all, sorry for the later reply.</P><P></P><P>I had tested your code with two TRK-KEA128 board without any problem.</P><P>Please check attached video for the detailed info.</P><P>Below is TRK-KEA128 CAN PHY schematics, please check the STB_CAN pin voltage (it must be in low voltage, otherwise the CAN communication couldn't work)</P><P><span class="lia-inline-image-display-wrapper" image-alt="pastedImage_1.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/13919iC52BD23BF1AD05B2/image-size/large?v=v2&amp;px=999" role="button" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P><P><BR />Wish it helps.</P><P></P><P>Have a great day,<BR />Ma Hui<BR />-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 09 Feb 2017 06:25:25 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/TRK-KEA128-only-communicating-one-way/m-p/640985#M38821 Hui_Ma 2017-02-09T06:25:25Z