How do I use the GPIOs in Windows 10 IoT Enterprise LTSC?
The only example code I can find is in the SEMA utility, which only allows setting of GPIOs for ID 0, bits 0-7 (which is only 8 in total) and setting these does not provide expected results.
For example, setting GPIO 0 as output and low - I only see either 1.56v or 3.3v at pin CSIO0 pin A5 (CAM0_GPIO0_3V). Setting GPIO 0 as high seems to make no difference. I also tried with PSE off for GPIO 0. I see similar inconsistent results for the S_GPIO06_3V to S_GPIO13_3V pins on the 40 pin header.
This page says that SEMA only supports the PCA9535 I/O expander GPIO Access | ADLINK SEMA® (adlinktech.github.io)
According to the LEC-EL datasheet the onboard GPIO controllers are ELx6000 (GPIOs 0-3) and SX1509 (GPIOs 4-11), and the one on the I-Pi SMARC Plus datasheet (sheet 10) is also a SX1509.
