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7 years, 5 months ago.
TOUCHSCREEN INIT FAIL when using external power source
Hi, Im using stm32f469I-Disco.
When I plug in ST-LINK everything is fine, But when I connect with my circuit board which has VTX-214-005-107, 7.5V, 666mA supply to Vin. "TOUCHSCREEN INIT FAIL".
Can anyone tell me why?
Thank you Thach
1 Answer
5 years, 1 month ago.
Hi there, the values of your power supply looks good. The red LED5 indicate to you correctness of the power supply.
You probably need to switch the position of the jumper on the JP2 header, from the position "STLK" to position "E5V" for the external power supply.
Some more info you can find in the manufacturer's user manual of the stm32f469I-Disco (page 12-14) https://www.st.com/content/ccc/resource/technical/document/user_manual/b7/34/4d/b8/bc/ae/47/1f/DM00218846.pdf/files/DM00218846.pdf/jcr:content/translations/en.DM00218846.pdf