Our setup uses a DRS4 evaluation board (version 2.0).
Although we trigger the board at a rate of ~4kHz (on channel2), readout through USB2 is only happening at a rate of ~125Hz.
After some investigation, we could pin down that it is due to the time it takes to complete the following commands: musb_write() and musb_read() which both take ~150 microsecond to complete. Because they are called multiple times, reading out 1 trigger takes ~8 millisecond which explains the 125Hz we're seeing.
Is ~150 us to complete a musb_read()/musb_write() command expected?
Is there any way we could speed up the readout rate of the DRS4 board so that data acquisition through USB2 is closer to our trigger rate of 4kHz?
Any feedback you might have on this topic would be greatly appreciated.