Enum embassy_stm32::can::OperatingMode

pub enum OperatingMode {
    InternalLoopbackMode,
    ExternalLoopbackMode,
    NormalOperationMode,
    RestrictedOperationMode,
    BusMonitoringMode,
}

Different operating modes

Variants

InternalLoopbackMode

This mode can be used for a “Hot Selftest”, meaning the FDCAN can be tested without affecting a running CAN system connected to the FDCAN_TX and FDCAN_RX pins. In this mode, FDCAN_RX pin is disconnected from the FDCAN and FDCAN_TX pin is held recessive.

ExternalLoopbackMode

This mode is provided for hardware self-test. To be independent from external stimulation, the FDCAN ignores acknowledge errors (recessive bit sampled in the acknowledge slot of a data / remote frame) in Loop Back mode. In this mode the FDCAN performs an internal feedback from its transmit output to its receive input. The actual value of the FDCAN_RX input pin is disregarded by the FDCAN. The transmitted messages can be monitored at the FDCAN_TX transmit pin.

NormalOperationMode

The normal use of the Fdcan instance after configurations

RestrictedOperationMode

In Restricted operation mode the node is able to receive data and remote frames and to give acknowledge to valid frames, but it does not send data frames, remote frames, active error frames, or overload frames. In case of an error condition or overload condition, it does not send dominant bits, instead it waits for the occurrence of bus idle condition to resynchronize itself to the CAN communication. The error counters for transmit and receive are frozen while error logging (can_errors) is active. TODO: automatically enter in this mode?

BusMonitoringMode

In Bus monitoring mode (for more details refer to ISO11898-1, 10.12 Bus monitoring), the FDCAN is able to receive valid data frames and valid remote frames, but cannot start a transmission. In this mode, it sends only recessive bits on the CAN bus. If the FDCAN is required to send a dominant bit (ACK bit, overload flag, active error flag), the bit is rerouted internally so that the FDCAN can monitor it, even if the CAN bus remains in recessive state. In Bus monitoring mode the TXBRP register is held in reset state. The Bus monitoring mode can be used to analyze the traffic on a CAN bus without affecting it by the transmission of dominant bits.

Trait Implementations

impl Clone for OperatingMode

fn clone(&self) -> OperatingMode

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for OperatingMode

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Format for OperatingMode

fn format(&self, f: Formatter<'_>)

Writes the defmt representation of self to fmt.

impl PartialEq for OperatingMode

fn eq(&self, other: &OperatingMode) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for OperatingMode

impl Eq for OperatingMode

impl StructuralPartialEq for OperatingMode