Hello @SamJ and thank you for posting your question in our STM32 Community :)
I advice you to have a look to the following resources which can help you to go further in your application:
In the STM32CubeF4 MCU package, you may find the example you need for your board:
\STM32Cube_FW_F4_V1.27.0\Projects\STM32F429I-Discovery\
I hope this resources are helpful for you.
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Thanks
Imen
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