Please help me analyze problems about the FATFS and STM32F4
I would like to realize the data which will record by TF, A frame of data which has 2048 bytes will be recorded every 20ms. The writing time of every frame of data canâ€™t ever 20ms. Because of the data was found to be lose,I opened a timing counter to calculate time in the program. As a result, the biggest time arrived 200ms !! Itâ€™s so big ! Then I opened a relief area of 20 frames, but the data lost as normal.
The transmission mode of SDIO is DMA.
Didnâ€™t the data write in ? How do you think about it?
The driving of SDIO is using atom.
The loss rate of data <=1%.
Please help me to find the reasons and measures,thank you in advance!
PS: the STM32F4's datasheet:http://www.kynix.com/uploadfiles/pdf659 ... 01CCU6.pdf
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