![](https://csdnimg.cn/release/download_crawler_static/86316681/bg10.jpg)
Connection to target UM2288
16/87 UM2288 Rev 5
When a byte is sent, the VCOM transfers the data over USB to the ST-LINK embedded in
the Nucleo board. The ST-LINK transfers the data on UART lines to the STM32WBxx
controller.
For BLE, a special firmware in STM32WBxx called ‘transparent mode’ copies the data
received on the Rx pin to the BLE stack. Data sent back by the BLE stack follows the
reverse path.
The transparent mode firmwares are available in the STM32CubeWB Firmware Package
(see folder \Projects\NUCLEO-WB55.Nucleo\Applications\BLE\ble_transparent_mode).
The wireless stack firmware stm32wb5x_BLE_Stack_fw.bin is available in
\Projects\STM32WB_Copro_Wireless_Binaries.
For Thread, the ‘Thread_Cli_cmd’ firmware copies the data from the UART to the
OpenThread command line interpreter. Data sent back by the interpreter are forwarded to
the UART.
The CLI firmwares are available in the STM32CubeWB Firmware Package
(see folder \Projects\NUCLEO-WB55.Nucleo\Applications\Thread\Thread_Cli_Cmd).
The wireless stack firmware stm32wb5x_Thread_FTD_fw.bin is available in
\Projects\STM32WB_Copro_Wireless_Binaries.
Figure 11. VCOM connection Thread
For 802.15.4 RF tests, the Cli_Phy_802_15_4 firmware transfers the data from the UART to
the 802.15.4 wireless stack. Data sent back by the stack follows the reverse path.
The Cli_Phy_802_15_4_M4.bin firmware binary is provided in the tool folder:
• for Windows
®
<Documents>\STMicroelectronics\STM32CubeMonitor-RF\firmwares
• for Linux
®
, <userhome>/STMicroelectronics/STM32CubeMonitor-RF/firmwares
• for macOS
®,
it is inside the document folder provided in the setup package
The wireless stack firmware stm32wb5x_rfmonitor_phy802_15_4_fw.bin is available in
\Projects\STM32WB_Copro_Wireless_Binaries
When the ST-LINK part is replaced by a USB to serial converter, the VCOM driver may be
installed automatically on the computer. For the converter without automatic driver setup,
the user must install the VCOM driver manually.
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