Example TRK-MPC5604P Initialization of SBC chip MC33905 and FlexCAN

Document created by Lukas Zadrapa Employee on Feb 28, 2014Last modified by Diana Torres on Feb 24, 2017
Version 2Show Document
  • View in full screen mode


* Detailed Description:


* ------------------------------------------------------------------------------

* Test HW:  TRK-MPC5604P, SPC5604P

* Maskset:  0M36W

* Target :  RAM

* Terminal: no

* Fsys:     64 MHz PLL with 8 MHz crystal reference in RUN0. IRC in DRUN




you have to use an external power supply to the board

(SBC power)



The SBC chip must be initialized (via SPI interface) to turn on the CAN




For ease of use, install the VSUP shunt on (jumper J5).

This it to put 9 V on the SBC's DBG pin - refer to the SBC Data Sheet

for more details about the DBG pin of the SBC chip.



This code initializes the MCU, then sends commands to the SBC chip

over the SPI bus to turn on the CAN transceiver, then the FlexCAN_0

module transmits a message out of the board.


I/O configuration for the TRK-MPC5604P CAN example:


MCU_PB0 -> SBC_TXD  (MPC5604P CAN0TX PCR[16] ALT1 function)

MCU_PB1 <- SBC_RXD  (MPC5604P CAN0RX PCR[17] input function)


SPI bus between the MCU and SBC:


MCU_PC4 -> SBC_!CS    (MPC5604P DSPI_0 CS0  ALT1 function PCR[36])

MCU_PC5 -> SBC_CLK    (MPC5604P DSPI_0 SCK  ALT1 function PCR[37])

MCU_PC6 -> SBC_MOSI   (MPC5604P DSPI_0 SOUT ALT1 function PCR[38])

MCU_PC7 <- SBC_MISO   (MPC5604P DSPI_0 SIN  input function PCR[39])