Simplicity SDK Platform - CPC Version 4.8.0 - Release Notes (Jan 22, 2026)#
Simplicity SDK Platform Version 6.0.0
Simplicity SDK Version 2025.12.0
The Co-Processor Communication (CPC) framework enables secure and efficient data exchange between two processors over a shared serial link, acting as a multiplexer to support multiple applications simultaneously. Designed with a Linux host (CPC daemon) as the primary device and an EFR(M) device as the secondary, CPC ensures reliable, in-order, error-free communication over encrypted UART or SPI connections.
Release Summary#
Key Features | API Changes | Bug Fixes | Chip Enablement
Key Features#
Added soft reset capability allowing the host to reset the device without performing a hard reset (for future usage).
Removal of legacy workaround in the secondary SPI driver for MMLDMA SYNC descriptor.
API Changes#
None.
Bug Fixes#
Host (CPC daemon) fixes: corrected CLI option handling for WSTK IP, improved WSTK configuration parsing, restored missing unit/perf/multithreading test scripts, and resolved a compilation error caused by version struct changes.
Chip Enablement#
None.
Key Features#
New Features | Enhancements | Removed Features | Deprecated Features
New Features#
Soft reset capability (for future usage).#
Added the ability for the host to reset the device without performing a hard reset. This feature is reserved for future functionality and provides a more graceful reset mechanism.
Enhancements#
Secondary SPI driver: removed workaround for MMLDMA SYNC descriptor bug.#
Removed a legacy workaround in the SPI secondary driver after upstream descriptor fixes, reducing code complexity and potential maintenance overhead.
Removed Features#
None.
Deprecated Features#
None.
API Changes#
New APIs | Modified APIs | Removed APIs | Deprecated APIs
New APIs#
New API Signature | Deprecated API replaced by this (if any) |
|---|---|
None | None |
Modified APIs#
None.
Removed APIs#
None.
Deprecated APIs#
None.
Bug Fixes#
Services (Host / CPC daemon)#
| ID | Issue Description | GitHub / Salesforce Reference (if any) | Affected Software Variants, Hardware, Modes, Host Interfaces |
|---|---|---|---|
| N/A | cpc: Fixed CLI handling in CPCd where --wireless-kit-ip was not recognized, ensuring both -w and --wireless-kit-ip function correctly. | None | Software: Linux host CPC daemon; Hardware: WSTK; Mode: WSTK validation; Host Interface: Board controller IP over network |
| N/A | cpc: Improved parsing and output formatting for WSTK configuration (-w) in CPCd to reflect accurate speeds and handshake reporting. | None | Software: Linux host CPC daemon; Hardware: WSTK; Mode: WSTK configuration; Host Interface: Board controller |
Chip Enablement#
None.
Application Example Changes#
New Examples#
None.
Modified Examples#
None.
Removed Examples#
None.
Deprecated Examples#
None.
Known Issues and Limitations#
None.