如何在 stm32f429zi 中使用循环模式？

Question

I am working on the DMA Peripheral, and i have some confusion about the circular mode`s parameters. i have tried to sort it out on my own. so i put an example and i want someone to tell me if i correctly understood it or i need someone to explain it for me Assume that I want to keep transferring 128 Half-word from a peripheral to a memory. assume:-

PSIZE=Half-Word(2bytes)
MSIZE=WORD(4bytes) 
PBURST=16

so according to the PSIZE being a half-word that means the beat is a half-word so in each burts i am going to transfer 16beats which are 16half-words correct? according to the reference manual it is noted that

NDTR=multipleof(PBURST * (MSIZE/PSIZE)) 

so in my example the NDTR is multiple of (32) correct? up till now if i am correct, what is the value that should be written in the NDTR according to these configurations?and if i am wrong please guide me to the correct answer

Answer 1

I think the documentation is self explanatory: