TS-4100 FPGA
From embeddedTS Manuals
The TS-4100 FPGA registers are accessed over I2C. The /sys/class/gpio driver provides access to the IO using these registers. See the #GPIO section for more information on the recommended method for IO access.
The FPGA is available at I2C addresses 0x28-0x2f. First write the address which is 16-bits, followed by the data which is 8-bits.
| Address | Bits | Description |
|---|---|---|
| 0:128 | 7 | GPIO mode |
| 6:0 | Crossbar Value | |
| 129:256 | 6:3 | Reserved (Write 0) |
| 2 | Input Data | |
| 1 | Output Data | |
| 0 | Output Enable |