I am having a general problem getting read back using the ROI mode. In the transparent mode everything looks good. These are the steps that I take:
1) configure register (b"11111111",addr = "1100")
2) configure write shift register (b"11111111", addr = "1101")
3) assert DENABLE and DWRITE
4) wait for trigger
5) on trigger deassert DWRITE
6) Strobe RSRLOAD
7)Set drs4 address to enable all channels (address = "1001")
8)give n SRCLK pulses
9) goto 3 and repeat.
Am I missing something? Everything looks straight forward based on the manual yet in the readout mode I only get noise. I do get the stop position on SROUT and the refclk is at 475 KHz as desired and I get the desired behaviour for DTAP toggling at the same frequency as refclk.