Drivers; St-Link/V2-1 Firmware Upgrade; Figure 5. Usb Composite Device - ST STM32F779I-EVAL User Manual

UM2036
Known limitation:
•
Activating the readout protection on ST-LINK/V2-1 target, prevents the target
application from running afterwards. The target readout protection must be kept
disabled.
For all general information concerning debugging and programming features common
between ST-LINK/V2 and ST-LINK/V2-1 versions, refer to ST-LINK/V2 in-circuit
debugger/programmer for STM8 and STM32 User manual (UM1075).
Note: 1 ETM can only work at 50 MHz clock by default because the ETM signals are shared with
other peripherals. If a best performance of ETM is required (e.g. 84 MHz/98 MHz), R31,
R34, R35, R37, R39, R42, SB7, SB8, SB25, SB27 and SB28, must be removed to reduce
the stub on the ETM signals. In this way SAI, Ethernet and camera are not functional and
NOR Flash and SRAM addresses are limited to A18.
Note: 2 When JP28 is open, the NRST of the ST-LINK MCU (U21) is pulled high. When JP28 is
closed, ST-LINK MCU is reset.
6.1.1

Drivers

Before connecting the STM32F779I-EVAL evaluation board to a Windows 7, Windows 8 or
Windows XP PC via USB, a driver for ST-LINK/V2-1 must be installed. It can be
downloaded from the
In case the STM32F779I-EVAL evaluation board is connected to the PC before installing
the driver, the PC device manager may report some STM32F779I-EVAL interfaces as
"Unknown". To recover from this situation, after installing the dedicated driver, the
association of "Unknown" USB devices found on the STM32F779I-EVAL evaluation board
to this dedicated driver, must be updated in the device manager manually.
Note: It is recommended to proceed using USB Composite Device, as shown in
6.1.2

ST-LINK/V2-1 firmware upgrade

The ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the
USB port. As the firmware may evolve during the life time of the ST-LINK/V2-1 product (for
example a new functionality, bug fixes, support for new microcontroller families), it is
recommended to visit the
board and periodically, to stay up-to-date with the latest firmware version.
www.st.com website.

Figure 5. USB composite device

www.st.com website before starting to use the STM32F779I-EVAL
DocID029088 Rev 3
Hardware layout and configuration
Figure 5.
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