I try to using the bare-metal programming this is my code RCC->AHB2ENR |= (1UL<<0);  // Enable clock to GPIO port ARCC->AHB2ENR |= (1UL<<13); // Enable clock to ADC1,2 GPIOA->MODER |= (1UL<<0);  // Set PA0 to analog modeGPIOA->MODER |= (1UL<<1);// GP...