IOBus Struct Reference
I/O bus descriptor. More...
#include <hal_pal.h>
Collaboration diagram for IOBus:
Data Fields | |
| ioportid_t | portid |
| Port identifier. | |
| ioportmask_t | mask |
| Bus mask aligned to port bit 0. | |
| uint_fast8_t | offset |
| Offset, within the port, of the least significant bit of the bus. | |
Detailed Description
I/O bus descriptor.
This structure describes a group of contiguous digital I/O lines that have to be handled as bus.
- Note
- I/O operations on a bus do not affect I/O lines on the same port but not belonging to the bus.
Field Documentation
◆ portid
| ioportid_t IOBus::portid |
Port identifier.
Definition at line 187 of file hal_pal.h.
Referenced by palReadBus(), palSetBusMode(), and palWriteBus().
◆ mask
| ioportmask_t IOBus::mask |
Bus mask aligned to port bit 0.
- Note
- The bus mask implicitly define the bus width. A logic AND is performed on the bus data.
Definition at line 193 of file hal_pal.h.
Referenced by palReadBus(), palSetBusMode(), and palWriteBus().
◆ offset
| uint_fast8_t IOBus::offset |
Offset, within the port, of the least significant bit of the bus.
Definition at line 197 of file hal_pal.h.
Referenced by palReadBus(), palSetBusMode(), and palWriteBus().
