ColdFire/68K Microcontrollers and Processors中的主题 Re: Coldfire 52234 FEC issue https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Coldfire-52234-FEC-issue/m-p/213127#M10605 <HTML><HEAD></HEAD><BODY><DIV>Hi,</DIV><DIV>&nbsp;</DIV><DIV>How many frame are you able to receive before the FEC locks up?&nbsp; I might be your release_RxBuffer_descr()&nbsp;&nbsp;function that's in cause.&nbsp; Make shure the Wrap bit stays set to one.</DIV><DIV>&nbsp;</DIV><DIV>Francois&nbsp;&nbsp;</DIV></BODY></HTML> Sun, 11 Jan 2009 01:50:16 GMT francois_boucha 2009-01-11T01:50:16Z Coldfire 52234 FEC issue https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Coldfire-52234-FEC-issue/m-p/213126#M10604 <HTML><HEAD></HEAD><BODY><DIV> </DIV><SPAN>Hi everybody,</SPAN><BR /><BR /><SPAN>I'm wondering about a strange behaviour of the 52234's FEC. I have</SPAN><BR /><SPAN>set up the FEC to handle only one receive BD which buffer size is</SPAN><BR /><SPAN>2048 bytes. In presence of a heavily loaded network I get a FEC lock</SPAN><BR /><SPAN>even if I always free the unique receive BD every time its E bit is set</SPAN><BR /><SPAN>to 0 by the FEC DMA engine. When I say FEC lock I intend that no</SPAN><BR /><SPAN>more RXF interrupts are rised.</SPAN><BR /><BR /><SPAN>I suspect the FEC locks because may happen that the receive FIFO is</SPAN><BR /><SPAN>full and there are no free receive BDs to write in the OV bit. Is my</SPAN><BR /><SPAN>assumption correct ? Can you explain me this FEC behaviour ?</SPAN><BR /><BR /><SPAN>Best Regards</SPAN><BR /><BR /><SPAN>/Alessandro</SPAN><BR /><BR /><DIV> </DIV></BODY></HTML> Wed, 31 Dec 2008 07:37:39 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Coldfire-52234-FEC-issue/m-p/213126#M10604 Alessandro 2008-12-31T07:37:39Z Re: Coldfire 52234 FEC issue https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Coldfire-52234-FEC-issue/m-p/213127#M10605 <HTML><HEAD></HEAD><BODY><DIV>Hi,</DIV><DIV>&nbsp;</DIV><DIV>How many frame are you able to receive before the FEC locks up?&nbsp; I might be your release_RxBuffer_descr()&nbsp;&nbsp;function that's in cause.&nbsp; Make shure the Wrap bit stays set to one.</DIV><DIV>&nbsp;</DIV><DIV>Francois&nbsp;&nbsp;</DIV></BODY></HTML> Sun, 11 Jan 2009 01:50:16 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/Coldfire-52234-FEC-issue/m-p/213127#M10605 francois_boucha 2009-01-11T01:50:16Z