E T H E R N E T C O M M U N I C A T I O N M O D U L E

Sample hash table code

S a m p l e h a s h t a b l e c o d e

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This sample C code describes how to calculate hash table entries based on 6-byte Ethernet destination addresses and a hash table consisting of two 32-bit registers (HT1 and HT2). HT1 contains locations 31:0 of the hash table; HT2 contains locations 63:32 of the hash table.

The pointer to the hash table is bits [28:23] of the Ethernet destination address CRC. The polynomial is the same as that used for the Ethernet FCS:

G(x) = x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1

static ETH_ADDRESS mca_address[MAX_MCA];

/*list of MCA addresses*/

static INT16 mca_count;

/*# of MCA addresses*/

/ *

 

*

 

* Function: void eth_load_mca_table (void)

 

*

 

* Description:

 

*

 

*This routine loads the MCA table. It generates a hash table for

*the MCA addresses currently registered and then loads this table

*into the registers HT1 and HT2.

*

*Parameters:

*none

*Return Values:

*none

*

*/

static void eth_load_mca_table (void)

{

WORD32 has_table[2];

//create hash table for MAC address eth_make_hash_table (hash_table);

334Hardware Reference NS9215

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Digi NS9215 manual M p l e h a s h t a b l e code

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.

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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.

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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.