Analog Devices VisualDSP++ 5.0 Service Manual page 402

Device Driver Model Overview
Figure 10-1. System Design and Hierarchy
• Device Manager – The device manager provides the single point of
access into the device driver model. The device manager provides
the API into the model. All interaction between the client and
device drivers occurs through the device manager. In addition to
providing the API, the device manager ensures that the client
makes calls into the API in the proper sequence, performs synchro-
nization services as needed, and controls all peripheral DMA (via
the system services DMA manager) for devices that are supported
by peripheral DMA.
10-4
APPLICATION
RTOS (OPTIONAL)
DEVICE MANAGER
PHYSICAL
DRIVER
SYSTEM SERVICES
VisualDSP++ 5.0 Device Drivers and System
Services Manual for Blackfin Processors
. . .
PHYSICAL
DRIVER