CPCd 4.6.0

Changed in release 4.6.0

• Introduced experimental support for NETLINK-SDIO on the SiWx917m platform.
• Increased the maximum supported SPI USART bitrate, allowing the Host to configure higher data transfer speeds for improved
  performance.
• Enhanced CPCd error handling for improved management of invalid packets received
• Refined the error messages printed by CPCd for improved clarity.

Fixed in release 4.6.0

• Fixed an issue where some Linux SPI drivers would skip over a transfer of 0 bytes. This caused CPCd and secondary
  to lose synchronization and cause a “The IRQ it stuck abnormally long in the de-asserted state."
• Fixed a rare race condition in the SPI driver on systems with high interrupt latency which could lead to CPC system
  losing communication with the host.
• Resolved an issue in CPC Journal where the ID and timestamp were displayed incorrectly, ensuring accurate data
  representation.

CPCd 4.4.5

Fixed in release 4.4.5

• Fixed a rare race condition in the SPI driver on systems with high interrupt latency
  which could lead to CPC system loosing communication with the host.
• Fixed an issue where some Linux SPI drivers would skip over a transfer of 0 bytes.
  This caused the primary and secondary to lose synchronization and cause a
  "The IRQ it stuck abnormally long in the de-asserted state.".

CPCd 4.5.2

Fixed in release 4.5.2

• Removed limitation on socket buffer when writing to endpoint using libcpc.
• Improved various warning message displayed

CPCd 4.5.1

Fixed in release 4.5.1

• Resolved the issue with the CPCd version in the Debian package.
• Fixed an issue where the value of errno was overwritten resulting in an endpoint being closed.

CPCd 4.5.0

Changed in release 4.5.0

• Fixed potential overflow when application version string is too long.
• Introduced a new script, on the secondary side, to enhance the configuration validation process for projects that utilize a VCOM based interface. The script specifically focuses on validating the setting SL_BOARD_VCOM_ENABLE to ensure it is correctly enabled when working with a VCOM interface.

Fixed in release 4.5.0

• Resolved an issue where the initialization between CPCd/Secondary would fail at runtime if the request for the application version couldn't be acknowledged.
• Addressed an issue causing negative RTO (retransmit timeout) calculation.

CPCd 4.4.2

Changed in release 4.4.2

• Enhanced CPCd logging by eliminating redundant and misleading data (re-sync mentions in the UART driver traces).
• Firmware upgrade speed over the SPI interface has been improved.

CPCd 4.3.3

Fixed in release 4.3.3

• Addressed a critical issue impacting CPCd functionality on big-endian platforms.
• Fixed an issue within CPCd where it now intelligently responds with a helpful message when encountering invalid input arguments.
• Rectified several instances of false-positive memory leaks identified by valgrind.

CPCd 4.4.1

Changed in release 4.4.1

• CPCd now provides a helpful message and exits when presented with an invalid input argument.
• Improved the CPCd EZSP firmware upgrade driver for enhanced speed and verbosity.
• Restored the capability to employ sysfs for GPIO management.

Fixed in release 4.4.1

• Addressed an issue on CPCd where a re-transmission failed to occur during the shutdown of the remote endpoint.

CPCd 4.4.0

Changed in release 4.4.0

CPC has evolved to a connection-oriented protocol for endpoints, streamlining the determination of the connection status with remote
endpoints. Notably, CPCd maintains backward compatibility with the previous version (Protocol V4), ensuring a smooth transition for
existing implementations.

• In CPCd, eliminated dependency on sysfs or libgpiod for GPIO control.
• Restricted Libcpc APIs from being called in the reset callback.
• Enhanced the libcpc reset callback to consistently detect CPCd exits, ensuring detection even when the process is not blocked on a
  file descriptor or hasn't called a CPC API previously.
• Removed the limitation of one application process/libcpc per CPCd instance, providing increased flexibility and scalability.

Fixed in release 4.4.0

• Resolved issues with CPCd on big-endian platforms.
• Addressed potential segmentation fault in the UART validator of CPCd.
• Resolved a libcpc case where, if no reset_callback was provided to cpc_init, the application process would forcefully
  exit upon secondary reset.
• During the Firmware upgrade, capped SPI Bus frequency at 4 MHz to prevent peripheral incompatibility, especially when the bootloader utilizes a
  USART and CPC EUSART.

CPCd 4.3.2

Fixed in release 4.3.2

• Corrected RTT value printing.
• Resolved issues on big-endian platform.
• Fixed a memory leak when transmitting a packet acknowledgement
• Resolved a CRC verification issue affecting supervisory frame