USB firmware development now available for STR7 and STR9 MCUs

7 February 2007 DSP, Micros & Memory

STMicroelectronics is offering a USB software Developer Kit for the STR7 and STR9 microcontroller families that it says will greatly simplify the implementation of embedded software to handle the relatively complex USB interface standard. USB is now very widely used in embedded systems, due to both its flexibility and simplicity for the user and also the availability of high-performance MCUs with integrated USB modules.

Both of ST's 32-bit ARM-based STR7 and STR9 MCU families include many variants with USB ports, alongside a broad range of other standard interfaces. The USB Developer Kit - which will be available to users as a free download from ST's website - supports STR71x and STR91x devices with USB, as well as the recently-announced STR75x family. It allows easy software development for all the USB transfer types, and includes an implementation of DFU (Device Firmware Update) to provide the capability to update system firmware through the USB interface.

The kit also includes a 'Virtual COM' demo (CDC class) to emulate the classic RS232 interface on USB, for users that want to benefit from the ubiquity of USB, but retain legacy software. The software kit includes a library of drivers.

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