CAN Rx block

This block implements receiving data by CAN interface on STM microcontrollers.

Contents

• Inputs
• Outputs
• Block parameters
• CubeMX settings

Inputs

None

Outputs

• Status – status of receive operation (1 – new message available)
• Id – id of received frame
• DLC – data length of received frame
• Data – received data

Block parameters

• Module number – number of CAN module used in model
• ID Type – type of ID to receive
• Init filter in loop –
• Type – type of filter (IDMASK – ID and mask / IDLIST – 2 IDs)
• Config FIFO – FIFO to receive frames to
• ID/ID1 – ID or ID1 setting for filter (11 bit for standard, 29 for extended)
• Mask/ID2 – Mask or ID2 setting for filter (11 bit for standard, 29 for extended)
• Data length (bytes) – Max data length to receive per frame
• Num of buffer – Frame buffer (software fifo) size
• Data output mode – Data output layout (vectors or matrix)
• Timeout [ms] – Receive timeout
• Sample time – period of function refreshing (-1 means that a particular block takes sample time from its input block or if it doesn’t have any input block it takes the fastest sample time in a model)

CubeMX settings

• Connectivity->CANx->Activated
• Connectivity->CANx->NVIC Settings tab->CANx RX0 interrupts enabled
• Connectivity->CANx->NVIC Settings tab->CANx RX1 interrupts enabled