A fast and easily customised operating system
for ARM devices
Input Streams
Programmer's Reference Manuals
» Part 15 – SWI Calls
» OS
» OS_Byte
» OS_Byte 2
» Input Streams
| # | Meaning |
|---|---|
| 0 | Keyboard input with serial input buffer disabled |
| 1 | Serial input |
| 2 | Keyboard input with serial input buffer enabled |
Notes
The difference between 0 and 2 is that the latter allows characters to be received into the serial buffer under interrupts as the same time as the keyboard is being used as the primary input. If the input streams are subsequently switched to the serial device, then those characters can then be read.