The Nucleus®I2C software from Mentor Graphics Corp. (Wilsonville, OR) is now available for developing appli cations needing access to on-board peripherals connect ed via the I2C bus. Demand is increasing for using the low-cost I2C bus to connect peripherals, such as liquid crystal displays (LCDs), light emitting diodes (LEDs), and non-volatile ran dom access memory (NVRAM), with the central processing unit (CPU). The software, when used in conjunction with products from the Nucleus RTOS portfolio, provides a solu tion for device integration and communication for a wide range of applications, such as consumer electronics, medical devices, industrial control, automotive infotainment, and mobile platforms.
The Nucleus I2C software is an embedded implementation of the I2C Bus Specification Version 2.1. The implementation provides the user with two sets of APIs. The first, called auto mated APIs, automates the start, transmit/receive, and stop functions for the developer and provides the result. The sec ond, called fine control APIs, gives developers full control on the behavior of an I2C node's communication. This allows the developer to design an application according to its requirements.
The software supports both 7-bit and 10-bit addressing schemes according to specification, along with special address schemes. The Nucleus I2C software stack also provides support for handling an indefinite number of communication chan nels (data transfer between master and slaves on multiple I2C networks).
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