Function HAL_SetCounterDownSource 

pub unsafe extern "C" fn HAL_SetCounterDownSource(
    counterHandle: HAL_CounterHandle,
    digitalSourceHandle: HAL_Handle,
    analogTriggerType: Type,
    status: *mut i32,
)

Sets the source object that causes the counter to count down.

@param counterHandle the counter handle @param digitalSourceHandle the digital source handle (either a HAL_AnalogTriggerHandle of a HAL_DigitalHandle) @param analogTriggerType the analog trigger type if the source is an analog trigger