A fast and easily customised operating system
for ARM devices
KeyV
Programmer's Reference Manuals
» Part 1 - Introduction
» Vectors
» Software Vector Numbers
» KeyV
Key Vector (19)
| Entry | |
|---|---|
| R0 | Reason Code |
Use
This vector has multiple uses, depending on the reason code in R0.
Reason Codes
| # | |
|---|---|
| 0 | Keyboard present |
| 1 | Key released |
| 2 | Key pressed |
| 3 | Notify driver of LED state |
| 4 | Enable keyboard device drivers |
| 5-11 | Reserved for system use |