Hi,
I would like to ask a question on EDMA transfer time.
I use AB synchronized DMA transfer and tested with different ACNT-BCNT combinations, which resulted in the table and graph below:
This immediately reveals a linear relationship between data bytes count and transfer time, which could roughly be:
T(ms) = 26 + 3.35×10-3D
In which T is transfer time in ms, and D is data amount in kilo bytes.
I have several questions:
1. Is this result the same as TI's internal test result? If not, did I missed any configuration that could improve performance?
2. Is there any way to reduce the 26ms set up time? Regardless of the amount of data being transferred, this 26ms is always required even if only 100 bytes are transferred. Is it possible to make this 26ms smaller?
3. On OMAP L138, is the performance of EDMA3 comparable with here the case of DM6437?
Zheng