https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT101x-LPSPI-API-Master-Blocking-Transfer-No-SDI-Signal/m-p/1308087#M15290 <P>Hi,<BR />Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.<BR />For the SPI master device, the SDI pin is a MISO pin of the SPI interface, it doesn't have signals otherwise, the slave device transfers the data to the master device.<BR />Hope this is clear.<BR />Have a great day,<BR />TIC</P> <P>-------------------------------------------------------------------------------<BR />Note:<BR />- If this post answers your question, please click the "Mark Correct" button. Thank you!</P> <P>&nbsp;</P> <P>- We are following threads for 7 weeks after the last post, later replies are ignored<BR />Please open a new thread and refer to the closed one, if you have a related question at a later point in time.<BR />-------------------------------------------------------------------------------</P> Thu, 15 Jul 2021 03:17:52 GMT jeremyzhou 2021-07-15T03:17:52Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT101x-LPSPI-API-Master-Blocking-Transfer-No-SDI-Signal/m-p/1307995#M15285 <P>On a custom RT1011 platform I am trying to bring up some SPI peripherals, but I see no signal on the SDI pin configured in the pin mux tool. I do see the SPI clock signal on the scope from its configured pin with the expected number of cycles as the number of bits I am writing.</P><P>I am using the LPSPI1 peripheral, SCK on GPIO_AD_06, SDI on GPIO_AD_03, SDO on GPIO_AD_04, CS not used, LPSPI API Master Blocking Transfer. What am I missing here?</P> Wed, 14 Jul 2021 23:25:06 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT101x-LPSPI-API-Master-Blocking-Transfer-No-SDI-Signal/m-p/1307995#M15285 vishayp 2021-07-14T23:25:06Z https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT101x-LPSPI-API-Master-Blocking-Transfer-No-SDI-Signal/m-p/1308087#M15290 <P>Hi,<BR />Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.<BR />For the SPI master device, the SDI pin is a MISO pin of the SPI interface, it doesn't have signals otherwise, the slave device transfers the data to the master device.<BR />Hope this is clear.<BR />Have a great day,<BR />TIC</P> <P>-------------------------------------------------------------------------------<BR />Note:<BR />- If this post answers your question, please click the "Mark Correct" button. Thank you!</P> <P>&nbsp;</P> <P>- We are following threads for 7 weeks after the last post, later replies are ignored<BR />Please open a new thread and refer to the closed one, if you have a related question at a later point in time.<BR />-------------------------------------------------------------------------------</P> Thu, 15 Jul 2021 03:17:52 GMT https://community.nxp.com/t5/i-MX-RT-Crossover-MCUs/RT101x-LPSPI-API-Master-Blocking-Transfer-No-SDI-Signal/m-p/1308087#M15290 jeremyzhou 2021-07-15T03:17:52Z