topic QSPI flash verify error in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/QSPI-flash-verify-error/m-p/1066969#M156797 <HTML><HEAD></HEAD><BODY><DIV class="" style="color: #777777; padding: 0px;">Hello, community.</DIV><DIV class="" style="color: #777777; padding: 0px;"></DIV><DIV class="" style="color: #777777; padding: 0px;">I am trying to implement a writing function to<SPAN>&nbsp;</SPAN><SPAN style="color: #51626f; background-color: #ffffff;">QSPI flash on iMX7Dual</SPAN>.<BR />However, a verify error occurs.<BR />In other words, what is written is different from what is read immediately after.<P></P>When I check the memory dump of the debugger, it seems that it is written correctly to the specified address of QSPI flash.<BR />CPU MMU and cache are disabled.<P></P>I'm guessing that QSPI flash has memory like cache. And I'm guessing that the flash is written correctly, but the same contents are not reflected in the memory (or vice versa).<BR />If so, please tell me the function, command, etc. that flushes the memory.<BR />What else could be the cause?</DIV><DIV class="" style="color: #777777; padding: 0px;"></DIV><DIV class="" style="color: #777777; padding: 0px;">Best regards,</DIV><DIV class="" style="color: #777777; padding: 0px;">Yuichi Takeda</DIV></BODY></HTML> Mon, 11 May 2020 02:13:46 GMT yuichi_takeda 2020-05-11T02:13:46Z QSPI flash verify error https://community.nxp.com/t5/i-MX-Processors/QSPI-flash-verify-error/m-p/1066969#M156797 <HTML><HEAD></HEAD><BODY><DIV class="" style="color: #777777; padding: 0px;">Hello, community.</DIV><DIV class="" style="color: #777777; padding: 0px;"></DIV><DIV class="" style="color: #777777; padding: 0px;">I am trying to implement a writing function to<SPAN>&nbsp;</SPAN><SPAN style="color: #51626f; background-color: #ffffff;">QSPI flash on iMX7Dual</SPAN>.<BR />However, a verify error occurs.<BR />In other words, what is written is different from what is read immediately after.<P></P>When I check the memory dump of the debugger, it seems that it is written correctly to the specified address of QSPI flash.<BR />CPU MMU and cache are disabled.<P></P>I'm guessing that QSPI flash has memory like cache. And I'm guessing that the flash is written correctly, but the same contents are not reflected in the memory (or vice versa).<BR />If so, please tell me the function, command, etc. that flushes the memory.<BR />What else could be the cause?</DIV><DIV class="" style="color: #777777; padding: 0px;"></DIV><DIV class="" style="color: #777777; padding: 0px;">Best regards,</DIV><DIV class="" style="color: #777777; padding: 0px;">Yuichi Takeda</DIV></BODY></HTML> Mon, 11 May 2020 02:13:46 GMT https://community.nxp.com/t5/i-MX-Processors/QSPI-flash-verify-error/m-p/1066969#M156797 yuichi_takeda 2020-05-11T02:13:46Z