STM32F4_ADC_CR1
.ier = STM32F4_ADC_CR1,
.ier_eoc = { STM32F4_ADC_CR1, STM32F4_EOCIE },
.ier_ovr = { STM32F4_ADC_CR1, STM32F4_OVRIE },
.res = { STM32F4_ADC_CR1, STM32F4_RES_MASK, STM32F4_RES_SHIFT },
stm32_adc_set_bits(adc, STM32F4_ADC_CR1, STM32F4_SCAN);
stm32_adc_clr_bits(adc, STM32F4_ADC_CR1, STM32F4_SCAN);