I have a custom board with Blackfin DSP and External SDRAM 64 MB and FreeRTOS. Reading from SDRAM using task with priority 6. In a test I read about 20000 words. Each word is twice consecutively, some the of words read do not match between the first read and second read. The two reads are done immediately one after the other.
If I repeat the same test using the highest priority, I do not get any errors.
If do the same test without FreeRTOS, I do not get any errors.
For normal operations I need to keep reading the SDRAM at low priority.
Any suggestions how to solve this issue ?d Where I need to look to find the cause of this issue ?