ChipSHOUTER Users Manual
: Simple EMFI Target (CW322)
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Simple EMFI Target (CW322)
Figure 6: CW322 Simple Target
The CW322 (Simple Target) is an easy to use target with the
ChipSHOUTER platform, and a good first introduction to EMFI.
The board features an STM32F303K8T6 that is pre-programmed
with very simple firmware, some of which is shown in Listing
1. The microcontroller simply uses two loops to multiply 300
by 300 and check the result. The board features 3 LEDs that
indicate the state of the device.
The START LED shows when the device begins code execu-
tion and will light whenever the device is reset. The RUN
LED blinks as the code is properly executed, if this light
stops blinking the device has frozen. The FAULT LED blinks
whenever the multiplication returns an incorrect value. This
normally never happens, but this abnormal behaviour can be
reliably induced by the ChipSHOUTER.
