CAN ReceiveĀ 

Target Category: C2407, Cortex M3, Delfino, F280x, F281X, Piccolo, STM32

Target Sub-Category: CAN

Description: The CAN Receive block implements a controller area network (CAN) version 2.0. This block generates code to receive up to four 2-byte integers from a CAN bus. Use CAN Config to configure the network.

CAN Device: Indicates the CAN device.

Data Pins: Controls the number of 2-byte integers to be received.

Data Pin Configuration

Byte Offset into CAN Package: Specifies the byte offset into the 8-byte packet. Offset 0 starts with the first element in the packet.

Pin: Indicates the pin to be configured.

Radix Point: Sets the binary point.

Type: Specifics the data type. Scaled_Int is 16- or 32-bit, depending on word size.

Word Size: Specifies the word size in bits.

Mailbox Number: Defines the mailbox to be used.

Masking Register: Represents a hexadecimal number used to mask off a portion of the identifier that would normally be used to match a CAN message identifier. For STM32 targets, the masking register is optional. In this case, to use it, you must activate the Use Mask parameter.

Message ID: Indicates the CAN message ID used to specify the network address.

Mux Pin: Selects the physical pin on the device a given function is on.

Note: Some F280x and MSP430 devices have different functions for the same physical pin on the chip. This is referred to as multiplexing, or muxing, for short, and is done because pins are expensive. Because multiple functions compete for a given pin, you must choose what function a pin has. For flexibility, in some cases Texas Instruments provides multiple pins for a given function. For instance, the CANTXB function can be on pin 8, 12, or 16. Pin 8 is shared with ePWM5A and ADCSOCA0; pin 12 is shared with TZ1 and SPISIMOB; and pin16 is shared with SPISIMOA and TZ5. If you want ePWM5A on a pin, you cannot use pin 8 for CANTXB, but rather use pin 12 or 16.

Number of Outputs: Controls the number of 2-byte integers to be received.

Receive extended frames: When activated, uses CAN 2.0 29-bit identifiers. When Receive extended frames is not activated, it uses 11-bit identifiers.

Set address dynamically: Changes address from which to receive as the algorithm runs.

Use Mask: For STM32 targets, you must activate Use Mask in order to enter the masking value.