emNet ― The TCP/IP stack for embedded devices
emNet is an industry-leading dual IPv4/IPv6 TCP/IP stack for embedded systems.
Overview
SEGGER's network software is designed from the ground up for embedded systems. It is renowned for its high-performance and small memory footprint while still providing flexibility and extensibility. It is at the heart of many industrial and IoT applications, and provides support for a wide variety of standard protocols.
emNet has proven its value in numerous customer products and in SEGGER’s own products, such as J-Trace PRO, J-Link PRO, J-Link WiFi, Flasher PRO, Flasher PRO XL and Flasher ARM for almost two decades. More than an IP stack, it is a complete software package designed to meet all network demands including, and especially, the Internet of Things.
emNet works best with an RTOS to provide efficient and easy to use connection handling. While SEGGER recommends using embOS, support for other RTOSes is available upon request. Using emNet without an RTOS is also possible.
Key features
- Easy to use
- Wide variety of upper layer protocols available
- Standard socket API for user applications
- Zero-copy supported for ultra-high performance and efficiency
- Simple compile-time configuration
- Extensive runtime configuration
- IEEE 1588 PTP precision time protocol support
- Works with or without an RTOS
- Outstanding documentation
World class IP-based communication
In the world of embedded systems, IP based communication lays the groundwork for any modern device. High-layer IoT (Internet of Things) protocols such as MQTT (Message Queuing Telemetry Transport) still rely on the availability of a TCP/IP stack to provide lower layers of communication in standard protocols such as TCP. As an industry-leading IP stack specifically designed for embedded devices, emNet is an ideal choice to provide this component. It is straightforward to configure and integrate and can easily be fine-tuned to the varying requirements and constraints of your embedded systems.
Efficiency
emNet combines maximum performance with minimal memory requirements and simple integration without configuration effort.
Its design, which specifically targets embedded devices, makes it highly efficient in terms of flash, RAM and packet processing speed. This means that even small, low-frequency microcontrollers deliver excellent network performance.
Software products
emNet is offered in two different editions: emNet BASE, the stack itself, which includes the most important protocols related to Ethernet communication, and a PRO package, which includes many other features.
| Supported protocols | emNet BASE | emNet PRO |
|---|---|---|
| Add-ons | emNet BASE | emNet PRO |
mDNS server | ||
| NTP client | ||
PTP OC client | ||
| SNTP client | ||
Tail tagging | ||
| Related software products | emNet BASE | emNet PRO |
emFTP client (FTP client) | ||
emFTP server (FTP server) | ||
emMQTT (MQTT client) | ||
emNet CoAP client / server | ||
emNet WebSocket client / server | ||
emWeb (web server) |
Included Optional
[1] WiFi driver required
Depending on the engineer's needs, there are several protocols available as add-ons. There is also emNet PRO which bundles a device driver, web server functionality, SMTP email sender, plus more to satisfy a broad spectrum of use cases in an attractive package.
Drivers
emNet itself does not contain any hardware dependencies. Any form of hardware dependency is abstracted through a hardware abstraction layer such as an NI (Network Interface) driver. All hardware specific functions for a particular Ethernet controller are typically located in a single emNet driver file. Writing your own emNet drivers is also possible due to the simple but extensible and powerful driver API.
Range of supported Ethernet hardware
By design, emNet supports both internal and external Ethernet MACs (Medium Access Controller), enabling any standard microcontroller to connect to Ethernet.
With emNet, even small, ultra low-power microcontrollers with minimal flash memory and no on-chip MAC can be used.
Available emNet drivers
The following Ethernet drivers are available for emNet:
| Device | Driver | Part # |
|---|---|---|
| Altera | ||
| NIOSII TSE | NIOSII Altera Triple Speed Ethernet (TSE) (10/100MBit) | 7.01.52 |
| Analog Devices | ||
| ADIN1110 | ADIN1110 MAC-PHY external Ethernet-APL controller | 7.01.57 |
| ASIX | ||
| AX88180 | AX88180 | 7.01.49 |
| Davicom | ||
| DM9000 (external) | DM9000 | 7.01.06 |
| GigaDevice | ||
| GD32F450 | Synopsys | 7.01.28 |
| Infineon | ||
| XMC45xx | Synopsys | 7.01.28 |
| XMC47xx | Synopsys | 7.01.28 |
| Longsys | ||
| GT202 (external WiFi) | GT202 | 7.15.04 |
| Microchip (Atmel/Micrel/SMSC) | ||
| AT91CAP9 | CADENCE | 7.01.47 |
| AT91RM9200 | AT91RM9200 | 7.01.18 |
| AT91SAM7x | CADENCE | 7.01.47 |
| AT91SAM9260 | CADENCE | 7.01.47 |
| AT91SAM9263 | CADENCE | 7.01.47 |
| AT91SAM9G20 | CADENCE | 7.01.47 |
| AT91SAM9G45 | CADENCE | 7.01.47 |
| AT91SAM9X25 | AT91SAM9X (optimized legacy driver) | 7.01.19 |
| AT91SAM9X25 | CADENCE | 7.01.47 |
| AT91SAM9X35 | AT91SAM9X (optimized legacy driver) | 7.01.19 |
| AT91SAM9X35 | CADENCE | 7.01.47 |
| AT91SAM9XE | AT91SAM9X (optimized legacy driver) | 7.01.19 |
| AT91SAM9XE | CADENCE | 7.01.47 |
| ATSAM3X | CADENCE | 7.01.47 |
| ATSAM4E8CA | CADENCE | 7.01.47 |
| ATSAMA5D3x | CADENCE | 7.01.47 |
| ATSAMA5D4x | CADENCE | 7.01.47 |
| ATSAMV71 | CADENCE | 7.01.47 |
| ATWILC1000 (external WiFi) | ATWILC1000 | 7.15.01 |
| AVR32UC | AVR32UC | 7.01.30 |
| ENC424J600 (external) | ENCx24J600 | 7.01.34 |
| ENC624J600 (external) | ENCx24J600 | 7.01.34 |
| KSZ8851SNL (external) | KSZ8851SNL | 7.01.43 |
| LAN9115 (external) | LAN9xxx | 7.01.20 |
| LAN9118 (external) | LAN9118 | 7.01.07 |
| LAN91C111 (external) | LAN91C111 | 7.01.21 |
| LAN9215 (external) | LAN9xxx | 7.01.20 |
| LAN9221 (external) | LAN9xxx | 7.01.20 |
| LAN9221i (external) | LAN9xxx | 7.01.20 |
| PIC32MZ | PIC32MZ | 7.01.55 |
| NXP (Freescale) | ||
| I.MX25x | i.MX25x | 7.01.39 |
| Kinetis Kxx | Kinetis | 7.01.33 |
| I.MXRT10xx | Kinetis | 7.01.33 |
| I.MXRT11xx ENET | Kinetis | 7.01.33 |
| I.MXRT11xx ENET | Kinetis | 7.01.33 |
| I.MX6 Solo/DualLite | Kinetis | 7.01.33 |
| LPC17xx | LPC | 7.01.05 |
| LPC18xx | Synopsys | 7.01.28 |
| LPC23xx | LPC | 7.01.05 |
| LPC24xx | LPC | 7.01.05 |
| LPC32xx | LPC | 7.01.05 |
| LPC40xx | LPC | 7.01.05 |
| LPC43xx | Synopsys | 7.01.28 |
| LPC54xxx | Synopsys QOS | 7.01.56 |
| MCF5223x | MCF5223x | 7.01.25 |
| MCF5329 | MCF5329 | 7.01.14 |
| S32K | Kinetis | 7.01.33 |
| Redpine Signals | ||
| RS9113 (external WiFi) | RS9113 | 7.15.03 |
| Renesas | ||
| H8S2472 | H8S2472 | 7.01.09 |
| RX62N | EtherC | 7.01.31 |
| RX63N | EtherC | 7.01.31 |
| RX64M | EtherC | 7.01.31 |
| RX65N | EtherC | 7.01.31 |
| RX71M | EtherC | 7.01.31 |
| RZ/A1 | RZ/A1 | 7.01.53 |
| S7G2 | EtherC | 7.01.31 |
| SH7670 | SH7670 | 7.01.27 |
| V850 D70351x | V850 D70351x | 7.01.35 |
| V850JGH3 | V850JGH3 | 7.01.38 |
| Spansion (Fujitsu) | ||
| MB9Bx10T | Synopsys | 7.01.28 |
| ST | ||
| STM32F1 | Synopsys | 7.01.28 |
| STM32F2 | Synopsys | 7.01.28 |
| STM32F4 | Synopsys | 7.01.28 |
| STM32F7 | Synopsys | 7.01.28 |
| STM32MP1 | Synopsys QOS | 7.01.56 |
| STM32H7 | Synopsys QOS | 7.01.56 |
| STR912 | STR912 | 7.01.04 |
| TI (Luminary) | ||
| AM335x | CPSW | 7.01.48 |
| LM3S6965 | LM3S6965 | 7.01.22 |
| LM3S9B90 | LM3S9B90 | 7.01.23 |
| MSP432E | Synopsys | 7.01.28 |
| TM4C (Tiva C) | Synopsys | 7.01.28 |
| Toshiba | ||
| TMPM369 | TMPM369 | 7.01.36 |
| Xilinx | ||
| Zynq-7000 | CADENCE | 7.01.47 |
PHY compatibility
emNet provides support for virtually any Ethernet PHY transceiver due to its flexible PHY driver layer. A generic PHY driver that is compatible with almost all single port PHYs on the market that follow the IEEE 802.3u standard is included with emNet. Support for other PHY-like devices such as Ethernet switches is also possible.