Other Parts Discussed in Thread: TSWDC155EVM, ADS9219,
Tool/software:
I'm using the TSWDC155EVM with a ADS9219EVM and trying to use the SYNC to trigger a transient signal input to the ADS9219 (ChA).
I know that the SYNC is meant for the ADC, but I would like to use it for the additional purpose of triggering a transient input signal, which is working.
However, there is a large delay (about one second) between the SYNC signal and the data collected and returned to the GUI. The delay also varies enough that just delaying the transient signal by a constant is not a solution. Probed the SPI between the FPGA and the ADS9219 and noticed that there is activity both before and after the SYNC. Trying to understand the delay I started to look into the GUI software part which is available as python code (.py). The GUI Start capture button triggers code in GUI_bridge.py. It appears to me that the Start capture button executes many steps through the USB connection to the FPGA resulting in the delay and variation of the delay.
Is there any thing I can do to control the delay and variation in delay?
Sven.
