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Appendix. Restore the pre-load firmware
Once the user has used the WICED SDK to build and download an image to the SN8000 EVK, the
preloaded image in the STM32 is erased. The following procedure may be used to reload the original
firmware through the serial port.
1.
Place the STM32 onboard the SN8000 EVB into boot mode to prepare to load image through
USART1.
a.
Unplug the mini-USB cable from the SN8000 EVB. Configure the EVB to be powered
by the USB.
b.
Pull up STM BOOT0 by placing the jumper on CN20.
c.
Reconnect the mini-USB cable to the SN8000 EVK. Press and release reset button.
Download and install the tool "STM32 and STM8 Flash loader demonstrator" from ST website
2.
(www.st.com) to the PC. The keyword to search is "flash loader". The snapshots shown below
are based on STMSW-MCU005 (version 2.6.0). More details can be found in [5].
3.
Double click the installer in the package. Once the installation process is completed, check the
option to launch the program then click on finish.
Page 24 of 30
SN8000 EVK User Guide
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