Hello, I've experienced an issue using MFS and a file writing task on
both a K60 custom board, and a K64F FRDM board: When the fopen() or
write() function is called the function will never return and the task will
cease operating. There are no errors thrown and I don't know where to
look to figure out why the function ceased. If I step through line by line
in the debugger eventually the debugger will just stop responding as
It happened first with a custom K60 based board, using MFS on the
Internal Flash (to facilitate developing the file logic until a new board with
better storage was developed). When a specialized test task wrote to
Flash it worked, and when ONLY the file writing task (not the webserver,
telnet server, sensor reading, or data uploading tasks) it also worked.
But when all the tasks were running the file writing would silently stop
the task. By lowering the priority of the file writing task to the lowest
priority it began to function properly.
Now, on the K64F FRDM board we are attempting to refactor that task
to use the SD card. The internal flash writing still works. We have also
used the SD card example application to verify the SD card writing
works. I moved the SD card initialization into our full project and it
installs and uninstalls the SD card appropriately, but whenever we try to
write to it the task silently fails again.
Any idea where or how I could try and Troubleshoot this, or what might
be happening? Because of the task priority and the way it just ceases, I
wondered if there's some sort of deadlock that occurs with the file
writing task and one of the others. Priority doesn't seem to be helping
the SD card case though.
We're using CodeWarrior Version: 10.5