Low Power ADC readback issue on STM32L052x6

Posted on May 03, 2016 at 23:27

We set ADC1 on the M0 micro-controller to listen to a GPIO pin. Under low power mode, the reading is shifted.

The low power mode for ADC setup is as following:

    .Instance = ADC1,

    .Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2,

    .Init.OversamplingMode = DISABLE,

    .Init.DataAlign = ADC_DATAALIGN_RIGHT,

    .Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD,

    .Init.LowPowerAutoWait = DISABLE,

    .Init.LowPowerAutoPowerOff = DISABLE,

    .Init.LowPowerFrequencyMode = ENABLE,

    .Init.ContinuousConvMode = ENABLE,

    .Init.DiscontinuousConvMode = DISABLE,

These lines are taken from samples from the dev package. Some how, the readings are shifted. Does anyone have any idea?