topic SPI baud rate in MQX Software Solutions https://community.nxp.com/t5/MQX-Software-Solutions/SPI-baud-rate/m-p/385126#M12832 <HTML><HEAD></HEAD><BODY><P>I tested the MQX SPI example in folder MQX/examples/spi. I used the Vybrid pcm052 board / M4 processor. I changed the baud rate to 1000. I read back the baud rate, it returned 1017 ... no problem here.</P><P></P><P>On the scope, I measure a clock rate of 2600 Hz which gives 333 byte/s (1/2600 * 8bit). I'm a little bit confused.</P><P></P><P>Can anybody explain me why ?</P></BODY></HTML> Fri, 13 Mar 2015 18:19:32 GMT hardwaredevelop 2015-03-13T18:19:32Z SPI baud rate https://community.nxp.com/t5/MQX-Software-Solutions/SPI-baud-rate/m-p/385126#M12832 <HTML><HEAD></HEAD><BODY><P>I tested the MQX SPI example in folder MQX/examples/spi. I used the Vybrid pcm052 board / M4 processor. I changed the baud rate to 1000. I read back the baud rate, it returned 1017 ... no problem here.</P><P></P><P>On the scope, I measure a clock rate of 2600 Hz which gives 333 byte/s (1/2600 * 8bit). I'm a little bit confused.</P><P></P><P>Can anybody explain me why ?</P></BODY></HTML> Fri, 13 Mar 2015 18:19:32 GMT https://community.nxp.com/t5/MQX-Software-Solutions/SPI-baud-rate/m-p/385126#M12832 hardwaredevelop 2015-03-13T18:19:32Z Re: SPI baud rate https://community.nxp.com/t5/MQX-Software-Solutions/SPI-baud-rate/m-p/385127#M12833 <HTML><HEAD></HEAD><BODY><P>Are you sure, that bus clock at your board has right value?</P><P>I suppose that you used twrvf65gs10 BSP as base for your own BSP. Correct?</P><P>Unfortunately I was not able found value of external crystal/resonator at pcm052 board.</P><P>Main oscillator at twrvf65gs10 has clock 24MHz. Ratio between set and generated baudrate is approximately 2.5~2.6. This leads to 62MHz crystal at your board or some different clock settings. Is it possible?</P><P></P><P></P><P>I hope it helps you.</P><P></P><P>Have a great day,<BR />RadekS</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Tue, 17 Mar 2015 14:32:59 GMT https://community.nxp.com/t5/MQX-Software-Solutions/SPI-baud-rate/m-p/385127#M12833 RadekS 2015-03-17T14:32:59Z