I 2 C M A S T E R / S L A V E I N T E R F A C E

Software driver

Code

Name

Master/slave

Description

 

 

 

 

0xB

S_TX_DATA_1ST

Slave

TX data required in register TX_DATA, first byte

 

 

 

of transaction

 

 

 

 

0xC

S_RX_DATA_1ST

Slave

RX data available in register RX_DATA, first

 

 

 

byte of transaction

 

 

 

 

0XD

S_TX_DATA

Slave

TX data required in register TX_DATA

 

 

 

 

0xE

S_RX_DATA

Slave

RX data available in register RX_DATA

 

 

 

 

0XF

S_GCA

Slave

General call address

 

 

 

 

S o f t w a r e d r i v e r

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I2C master software driver

I2C slave high level driver

The I2C master software driver uses three commands only:

M_READ to start a read sequence

M_WRITE to start a write sequence

M_STOP to give up the I2C bus

If, during a read or write sequence, another M_READ or M_WRITE is requested by the ARM CPU, a restart is performed on the I2C bus. This opens the opportunity to provide a new slave device address in the MAster Address register before the command request.

The I2C slave high level driver identifies one command: S_STOP, to discontinue a transaction. After this command, the slave remains inactive until the next start condition on the I2C bus. If a slave is accessed by a master, it generates S_RX_DATA and S_TX_DATA interrupts (see “Master/slave interrupt codes” on page 455). To distinguish the transactions from each other, special S_RX_DATA_1ST and S_TX_DATA_1ST interrupts are generated for the transmitted byte.

456Hardware Reference NS9215

Page 456
Image 456
Digi NS9215 manual F t w a r e d r i v e r, I2C master software driver I2C slave high level driver

NS9215 specifications

The Digi NS9215 is a powerful solution designed for industrial applications that require reliable connectivity and robust performance. Built on a foundation of advanced technologies, the NS9215 serves as a versatile networking device that meets the demands of automation, remote monitoring, and data acquisition.

One of the standout features of the Digi NS9215 is its multi-protocol support. It is capable of handling various communication protocols, including Ethernet, Serial, and Wireless, making it ideal for integration into heterogeneous environments. This flexibility enables users to connect legacy devices to modern networks seamlessly, facilitating smoother data communication across different platforms.

The NS9215 is equipped with powerful processing capabilities, featuring an integrated processor that ensures efficient data handling. This enables the device to perform complex data tasks without compromising performance. Its high-speed connectivity options also allow for rapid data transmission, which is crucial for real-time applications in industrial settings.

Another critical characteristic of the Digi NS9215 is its reliability in harsh environments. Built to withstand extreme temperatures, humidity, and electrical interference, this device assures consistent operation even in challenging conditions. Its rugged design minimizes the risk of failure, making it suitable for deployment in various industrial environments.

Security is a top priority for the Digi NS9215. It comes with advanced security features that protect sensitive data during transmission and prevent unauthorized access. Employing encryption protocols and secure authentication methods, the NS9215 ensures that data integrity and confidentiality are maintained throughout its operation.

The user-friendly interface of the NS9215 allows for easy configuration and management. This ease of use reduces the time required for installation and setup, enabling quick deployment in field operations. Additionally, remote management capabilities enhance operational efficiency, allowing users to monitor device performance and make adjustments from anywhere.

Furthermore, the NS9215 supports extensive scalability options. As organizations grow and evolve, the ability to scale up or adapt the networking capabilities becomes essential. With its modular design, the NS9215 can easily accommodate additional devices and protocols, ensuring longevity and continued relevance in a rapidly changing technological landscape.

In conclusion, the Digi NS9215 is a robust networking device designed for a wide range of industrial applications. Its multi-protocol support, reliability, security features, user-friendly interface, and scalability make it a valuable addition to any industrial network infrastructure, delivering performance and efficiency that businesses can depend on for critical operations.