Zilog EZ80F91AZA - Manual (Page 17)

UM007518-1211 Board Support Package Configuration
Zilog Real-Time Kernel: eZ80
®
CPU
User Manual
7
RZK provides a very simple and generic device driver model that can be used to develop
drivers for different types of devices; RZK BSP is based on this device driver model.
The RZK device driver model contains a hardware abstraction layer called the DDF,
which provides a common interface to gain access to various devices. DDF accesses these
devices using the global device table. The driver functions are connected to this device
table. Each device is identified by its handle, which is the pointer to the device entry in the
device table
usrDevBlk .
The RZK DDF provides APIs that perform operations on any of the drivers present in the
BSP. These APIs are briefly described in Table 2.
For details about DDF APIs, refer to the Zilog Real-Time Kernel Reference Manual
(RM0006) .
Board Support Package Configuration
This section discusses the available RZK BSP configurations.
UART Configuration
The configurable parameters for the UART driver are located in the uart_conf.c source
file that accompanies the RZK release in the following path:
\Program Files\Zilog\

ZDSII_eZ80Acclaim!_A.B.C\ZTP\ZTPX.Y.Z_Lib\RZK\Conf
To change any of the UART parameters, you must include this file in the project and set
the appropriate values, as defined in Table 3.
Table 2. RZK Device Driver Framework APIs
DDF API Description
RZKDevAttach Attaches the device for communication
RZKDevDetach Detaches the device from communication
RZKDevOpen Opens the device for communication
RZKDevRead Reads from the device
RZKDevWrite Writes to the device
RZKDevIOCTL Performs I/O control operations
RZKDevClose Closes the device for communication
Note: