Hi, I am trying to wrap my head around a potential smartio use:
Goal: Deterministic cycling between three GPIO signals that control isolated FETs to toggle between three voltage levels on *one* output pin. To avoid shorts, only one signal may be high, and a dead time between switching would be helpful. In the end I'd like to have a function that enables the smartio voltage cycling like cycle_voltage(count,ontime,deadtime);
Signal pins: SIG_GND, SIG_MID, SIG_HIGH -> controlling the external 0V, 75V, 135V switching in my application:
SIG_HIGH=1 ________ 135V
| |
SIG_LOW=1 _______| | ______... 75V
| | |
SIG_GND=1 ____| |______ | 0V
Desired toggle behavior: 100-500uS signal high, then 0-1uS dead time, then signal high for next SIG_ pin.
Questions:
- I want to 1) cycle and 2) control signal high time for each signal and dead time from firmware. How do I think of this problem in terms of Chip inputs, clocks and perhaps chained LUTs?
- Can I link the SAR ADC's EOS trigger to start the smartio cycling?
- Alternatively, would it be possible in smartio to start the ADC on the first voltage cycling and snapshot scan every X cycles?
Thanks!
