Ave, Today i encounter another problem with Keil libraries... The problem applies to fopen() function in update mode "w+" and SPI Flash memory. In such situation fopen() returns NULL. There is no problem when accessing uSD card nor SPI Flash without "+" qualifier (i.e. "w" or "a"). Documentation says it should work. Particulary I need to create *.json file and I need to overwrite data inside the file. Is there any solution/workaround for this? Finally I can use row data on SPI Flash memory but FAT file system is better solution.
My IDE is MDK Proffessional 4.54
Best regards, Slavo