SimpleLink™ CC32xx Host Driver 3.0.1.46 Release Notes

Table of Contents

Introduction

The SimpleLink™ Wi-Fi® CC32XX/31XX device family is a single-chip with built-in Wi-Fi connectivity, created for IoT (Internet of Things) purposes. The CC32XX device is a wireless MCU that integrates a high-performance ARM® Cortex®-M4 MCU, allowing customers to develop an entire application with a single IC.

The Texas Instruments royalty-free SimpleLink host driver provides a complete software library, made especially for developing Wi-Fi® applications for the CC32XX/CC31XX network processors.

This is version 3_0_1_46 of the SimpleLink host driver.

Content and Documentation

The SimpleLink CC32XX/31XX is comprised of two components:

The Core driver, which is a generic NWP driver for the CC32XX/31XX SimpleLink products. The other is platform abstraction layer, which provides a means to communicate with the host platform hardware and operating system services.

The individual components have their own folders, refer to the table below.

Component	Source Directory
SimpleLink Wi-Fi host driver Core	source\ti\drivers\net\wifi\
SimpleLink Wi-Fi host driver platform files	source\ti\drivers\net\wifi\porting
SimpleLink Wi-Fi host driver API documentation	docs\wifi_host_driver_api

SimpleLink host driver has several build configurations:

Configuration
RTOS	Used for applications which are running with RTOS.
NO-RTOS	Used for applications which are running without an RTOS.

Documentation

CC323X\31X0 API guide - Overview of the host driver library’s API

What’s New

• Bug fixes
• Multiple Select support
• New API: sl_StartTLS - Initiate TLS connection that is blocked until the TLS handshake finish

Device Support

• CC3220 R\S\SF LAUNCHXL
• CC3120 BOOST
• CC3235 S\SF LAUNCHXL
• CC3135 BOOST

Fixed Issues

ID	Summary
CC3X20SDK-974	Change headers for host driver files.
CC3X20SDK-944	Incorrect “#ifdef SL_SUPPORT_IPV6” Scope
CC3X20SDK-935	Multiple Select: Error -98 returns on select.
CC3X20SDK-934	Multiple Select: Select does not return on timeout if fd lists are empty while multiple selects called
CC3X20SDK-933	Multiple Select: Error -10 on accept as a result of bad fdset returns in select, when max socket capacity is reached
CC3X20SDK-932	Multiple Select: Some selects do not return if multiple selects are called with writable fd set (TCP Client)
CC3X20SDK-906	Host driver prints Fatal errors with 4-bytes offset
CC3X20SDK-905	[REQ_EOU]: Support multiple select (BSD) calls

Known Issues

ID	Summary
CC3X20SDK-355	Host Driver - ‘Tiny’ mode not functional

Important notes

• BSD layer has been move from the Host driver to the SlNetSock Layer User can check errno after each call, to query which error occurred when using the SlNetSock Layer. To push the BSD support
  even further, six additional headers are included in the Host driver, under ‘bsd’ folder:
  • errno.h
  • netdb.h
  • sys/socket.h
  • sys/select.h
  • arpa/inet.h
  • netinet/in.h

  Users who wish to incorporate BSD to their code, should add the following
  include path to their projects: <SDK_INSTALL_DIR>\source\ti\net\bsd .

• The compilation flag SL_INC_STD_BSD_API_NAMING is deprecated.

• Host driver is now supporting multiple select callers:

  • Up until now, SimpleLink Host driver supported a single select action at any given time.

  • As a result, only one thread could have utilize select calls in order to monitor sockets for incoming traffic.

  • In version 3_0_1_46 we have now enable up to MAX_CONCURRENT_ACTIONS select callers at the same time.

  • MAX_CONCURRENT_ACTIONS is defined in user.h and is configurable by user.

  • Users must also be aware that for the sake of implementing this feature, an extra socket has been taken from the user socket’s pool, leaving total of 15 sockets, rather than 16.

  • If no more sockets are available in the time of a multiple select call (i.e all 16 sockets are open) select defaults to the legacy behavior, namely one caller at a time.

Technical Support and Product Updates

• Visit the E2E Forum