RTOS - Nucleus Embedded Real Time Operating System - Source Code/Royalty Free - from Accelerated Technology, Embedded Systems Division of Mentor Graphics

Nucleus Bus Support services offers a wide array of bus-based systems. Busses can be used to control peripherals on a single platform, or to coordinate with controllers in separate devices.

Nucleus Bus Support accommodates the following key technologies:

Controller Area Network (CAN)
Supports communications between controllers and is the basis for the CANopen module.
CANOpen
Supporting the highest levels of CAN, Nucleus Bus Support provides CANOpen compliant support enabling communications for internal machine networks and embedded systems.
PCI/PCI-X
Whether through an expansion card or within an integrated circuit, PCI provides a high performance basis for communicating with and controlling peripherals.
Serial Peripheral Interface (SPI)
SPI is a light-weight, low-speed bus optimized for embedded devices. Though SPI can be used to connect many peripherals to a master, it’s a bus interface optimized with a single master connected to a single peripheral.
Inter-Integrated Circuit (I²C)
A lower cost solution than SPI, I²C is also slower. It does, however, serve as a versatile means of communicating to peripherals within a device.

Bus Support Diagram

Key Benefits

Built-in hardware abstraction allows you to easily port from one system to another

To ease porting bus protocols from one system to another; the hardware-specific information is abstracted to a simple, easy-to-modify module. The result is a single API visible to all peripheral drivers in a system.

Support for wide range of communication protocols

From the highest level of CAN, to PCI and PCI-X, to the light-weight, low-speed capabilities of SPI, Nucleus Bus Support offers these protocols and more. The highly versatile I²C is also supported, an ideal means of communicating to peripherals within a device.

Easy to use with readily available source code

Nucleus Bus Support is shipped with source code and is ANSI C compliant

Key Features

CAN/CANOpen

Designed for automotive/industrial control applications
Supports CAN 2.0A/B message frame formats
Contains COM 2.2.2 with support for UUDT and USDT Protocols
Error detection and error signaling capabilities
Supports broadcast messages
CiA DS-401, 404, and 405 standard

I2C

Two-level API: the higher-level API does everything for the user and provides the end result, while the lower-level API provides fine control on the low-level details of the protocol
Hardware driver integration
Multiple ports

PCI/PCI-X

Contains higher-level functions to perform PCI and PCI-X initialization and provides the device driver interface
Target specific libraries include low-level routines and data support
- Provides PCI host bridge configuration
- Provides PCI device configurations and target support data
Supports PCI-X 2.0 standard

SPI

Master/Slave support: SPI supports both SPI master and slave devices
Interrupt/Polling support
Hardware driver integration
Multiple controller support

Nucleus Bus Support