I'm trying to compile a source code from https://www.st.com/resource/en/application_note/dm00050879.pdf in Keil. I get the following errors
Error: L6218E: Undefined symbol ADC_GetConversionValue (referred from main.o).
Error: L6218E: Undefined symbol ADC_GetFlagStatus (referred from main.o).
Error: L6218E: Undefined symbol ADC_SoftwareStartConv (referred from main.o).
I'm a beginner here, how to resolve them ?
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