ColdFire/68K Microcontrollers and ProcessorsのトピックFlexcan Overrun problem https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Flexcan-Overrun-problem/m-p/181153#M7381 <HTML><HEAD></HEAD><BODY><DIV>Hi,</DIV><DIV>&nbsp;</DIV><DIV>I'am busy with the development of a CAN driver for the CF5329.</DIV><DIV>Message buffer 0-14 are set to receive and buffer 15 is my TX buffer.</DIV><DIV>When I receive a message, it is always posted into the message buffer 0. (No masking is active)</DIV><DIV>Is there a way to use all the receive buffers.</DIV><DIV>&nbsp;</DIV><DIV>When my timer intu routine takes to long (300µs) can messages are lost in MBUF0. The overrun flag is set. But the other message buffers are still empty.</DIV><DIV>I use the can bus with a speed of 500k.</DIV><DIV>Everything is working fine but when my timer intu function takes more time than the time of a can frame, can frames are lost.....</DIV><DIV>&nbsp;</DIV><DIV>Thanks in advance</DIV></BODY></HTML> Thu, 21 Aug 2008 22:05:16 GMT Koen 2008-08-21T22:05:16Z Flexcan Overrun problem https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Flexcan-Overrun-problem/m-p/181153#M7381 <HTML><HEAD></HEAD><BODY><DIV>Hi,</DIV><DIV>&nbsp;</DIV><DIV>I'am busy with the development of a CAN driver for the CF5329.</DIV><DIV>Message buffer 0-14 are set to receive and buffer 15 is my TX buffer.</DIV><DIV>When I receive a message, it is always posted into the message buffer 0. (No masking is active)</DIV><DIV>Is there a way to use all the receive buffers.</DIV><DIV>&nbsp;</DIV><DIV>When my timer intu routine takes to long (300µs) can messages are lost in MBUF0. The overrun flag is set. But the other message buffers are still empty.</DIV><DIV>I use the can bus with a speed of 500k.</DIV><DIV>Everything is working fine but when my timer intu function takes more time than the time of a can frame, can frames are lost.....</DIV><DIV>&nbsp;</DIV><DIV>Thanks in advance</DIV></BODY></HTML> Thu, 21 Aug 2008 22:05:16 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Flexcan-Overrun-problem/m-p/181153#M7381 Koen 2008-08-21T22:05:16Z Re: Flexcan Overrun problem https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Flexcan-Overrun-problem/m-p/181154#M7382 <HTML><HEAD></HEAD><BODY>Hi,<BR /><BR />In order to use your 15 MBs, you may disable one by one upon each frames reception.&nbsp; This way, let's say 10 frames arrive into your FlexCAN, they'll go into MB 0 to 9.&nbsp; After you can read them and reactivate them.<BR /><BR /><BR /><DIV></DIV></BODY></HTML> Tue, 26 Aug 2008 01:51:13 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Flexcan-Overrun-problem/m-p/181154#M7382 francois_boucha 2008-08-26T01:51:13Z