Receiving Data Frames; Data Frame Receive Procedure - Mitsubishi Electric M32R Series User Manual

Mitsubishi 32-bit risc single-chip microcomputers

Table of Contents

13.6 Receiving Data Frames

The following describes the procedure for receiving data frames.

(1) Initializing the CAN Message Slot Control Register

Initialize the CAN Message Slot Control Register for the slot in which you want to receive by

writing H'00 to the register.

(2) Confirming that reception is idle

Read the CAN Message Slot Control Register after being initialized and check the TRSTAT

(Transmit/Receive Status) bit to see that reception has stopped and remains idle. If this bit = 1, it

means that the CAN module is accessing the message slot, so you need to wait until the bit is

(3) Setting the receive ID

Set the ID you want to receive in the message slot.

(4) Setting the Extended ID Register

Set the corresponding bit of the Extended ID Register to 0 when you want to receive a standard

frame or 1 when you want to receive an extended frame.

(5) Setting the CAN Message Slot Control Register

Write H'40 to the CAN Message Slot Control Register to set the RR (Receive Request) bit to 1.

13.6 Receiving Data Frames