I am new to KEIL and start learning for an project. I have got the message error shown below : Error: L6218E: Undefined symbol ADC_RegularChannelConfig (referred from main_test_adc.o).
I searched about this error but I still don't know how to solve it. I am using uvision 4 and stm32f103rb processor and write a simple program using ADC. Please help me if you encounter similar problem before. I really appreciate everyone's help. :)