topic cannot get flashx drivers working in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/cannot-get-flashx-drivers-working/m-p/290150#M11518 <HTML><HEAD></HEAD><BODY><P>i'm devoloping a simple gui on k70 tower, using mqx 4.0.1 and egui 3 in codewarrior 10.3.</P><P>After an usuccesfully attemp with external nand flash, i'm trying with internal flash, using provided flashx drivers, to store some data.</P><P>I started from the demo, that works good, but it writes and read olny once.</P><P>Modifying the demo to make sequential writes and reads at the same memory address (e.g. seeking -4096 from the end), some times it misses a write, and reads the value written at the previous cycle, though write() function returns the actual size of bytes that had to be written. Some times it misses even more than 1 cycle. I can't recognize if it is a write or read issue.</P><P>This in ideal condition... if i change memory location (seek to), or change the length of data to be written (these are the only changes i made: seek to different location or the number of bytes to write/read), i get different erroneous behavior: such as never write, or read the correct value (the last written) only after a reset, or other erratics...</P><P></P><P>driver problem, hw problem...? ideas?</P><P></P><P>thanks</P><P><BR /> </P></BODY></HTML> Thu, 13 Jun 2013 10:50:56 GMT lorenzofornari 2013-06-13T10:50:56Z cannot get flashx drivers working https://community.nxp.com/t5/Kinetis-Microcontrollers/cannot-get-flashx-drivers-working/m-p/290150#M11518 <HTML><HEAD></HEAD><BODY><P>i'm devoloping a simple gui on k70 tower, using mqx 4.0.1 and egui 3 in codewarrior 10.3.</P><P>After an usuccesfully attemp with external nand flash, i'm trying with internal flash, using provided flashx drivers, to store some data.</P><P>I started from the demo, that works good, but it writes and read olny once.</P><P>Modifying the demo to make sequential writes and reads at the same memory address (e.g. seeking -4096 from the end), some times it misses a write, and reads the value written at the previous cycle, though write() function returns the actual size of bytes that had to be written. Some times it misses even more than 1 cycle. I can't recognize if it is a write or read issue.</P><P>This in ideal condition... if i change memory location (seek to), or change the length of data to be written (these are the only changes i made: seek to different location or the number of bytes to write/read), i get different erroneous behavior: such as never write, or read the correct value (the last written) only after a reset, or other erratics...</P><P></P><P>driver problem, hw problem...? ideas?</P><P></P><P>thanks</P><P><BR /> </P></BODY></HTML> Thu, 13 Jun 2013 10:50:56 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/cannot-get-flashx-drivers-working/m-p/290150#M11518 lorenzofornari 2013-06-13T10:50:56Z