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Add documentation for the RGB LED

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Signed-off-by: Joachim Strömbergson <joachim@assured.se>
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Joachim Strömbergson 2022-12-19 13:22:22 +01:00
parent f09fcfadb8
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doc/system_description/fpga.md
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@ -150,6 +150,9 @@ includes:
- Read access to the 32 bit FPGA design version, expressed as an integer
- Control and status access for the RGB LED on TKey board
- Setting bit 0 high turns on the Blue LED.
- Setting bit 1 high turns on the Green LED.
- Setting bit 2 high turns on the Red LED.
- Control and status access for the 4 GPIOs on the TKey board
- GPIO 1 and 2 are inputs and provide read access to the

3
doc/system_description/software.md
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@ -521,7 +521,8 @@ Assigned core prefixes:
| `VERSION` | r | r | 4B | u32 | 1 | Current version. |
| `SWITCH_APP` | r/w | r | 1B | u8 | | Write anything here to trigger the switch to application mode. Reading |
| | | | | | | returns 0 if device is in firmware mode, 0xffffffff if in app mode. |
| `LED` | w | w | 1B | u8 | | |
| `LED` | r/w | r/w | 1B | u8 | | Control of the color LEDs in RBG LED on the board. |
| | | | | | | Bit 0 is Blue, bit 1 is Green, and bit 2 is Red LED. |
| `GPIO` | r/w | r/w | 1B | u8 | | Bits 0 and 1 contain the input level of GPIO 1 and 2. |
| | | | | u8 | | Bits 3 and 4 store the output level of GPIO 3 and 4. |
| `APP_ADDR` | r/w | r | 4B | u32 | | Firmware stores app load address here, so app can read its own location |