Quality RTOS & Embedded Software

LIBRARIES
WHAT'S NEW
FreeRTOS:
November 2021 release includes Cellular Interface library and improved MPU support, see blog post
FreeRTOS LTS:
LTS libraries are now included in our partner toolchains, see blog post
FreeRTOS:
FreeRTOS adds reference implementations for SMP, see blog post
FreeRTOS:
July 2021 release now includes the SNTP library, see blog post.
AWS Reference Integrations:
See our latest 202107.00 release's blog post.

Porting the Cellular Interface Library to another Modem

FreeRTOS now supports the AT commands of a TCP offloaded Cellular abstraction Layer. In order to add support for a new cellular modem, a developer can use the common component that has already implemented the 3GPP standard AT commands.

In order to port the common component:

  1. Implement the cellular modem porting interface defined in cellular_common_portable.h (Documentation).
  2. Implement the subset of the Cellular Interface library API's that use vendor-specific (non-3GPP) AT commands. The APIs to be implemented are the ones not marked with an "o" in this table.
  3. Implement the Cellular Interface library callback functions that handle vendor-specific (non-3GPP) Unsolicited Result Codes (URC). The URC handlers to be implemented are the ones not marked with an "o" in this table.

The Cellular common APIs document provides detailed information required for each step. We recommend that you start by cloning the implementation of one of the existing modems, then make modifications where your modem's vendor-specific (non-3GPP) AT commands are different.

Current Example Implementations:

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