How to configure Slave in LIN module on MPC5777M EVM board ?

[anishchoudhary]

For LIN module on MPC5777M and MPC5748G EVM board ? I configure for LIN slave that you can find in following code

    LINFlexD_0.UARTCR.B.UART = 0 ;   // Disable the LINFlexd_UART to work with LINFlexD_LIN module
    LINFlexD_0.LINCR1.B.INIT = 1 ;  // For configuration come in INIT mode
    LINFlexD_0.LINCR1.B.SLEEP = 0 ;   // Avoid the sleep mode

    LINFlexD_0.LINIBRR.B.IBR = 480 ;   // Set the baud rate for slave ,same i configure in master side.
    LINFlexD_0.LINFBRR.B.FBR = 0 ;

    LINFlexD_0.LINCR2.R = 0x40 ;
    LINFlexD_0.LINTCSR.R = 0 ;

    LINFlexD_0.IFER.R = 0xF;                            // enable filters 0-3
    LINFlexD_0.IFMR.R = 0x0;                            // filters 0 - 3 are in identifier list mode.

   LINFlexD_0.IFCR[0].R = 0x1E37;
    LINFlexD_0.IFCR[1].R = 0x1C35;

    LINFlexD_0.IFCR[2].R = 0x1F36;
    LINFlexD_0.IFCR[3].R = 0x1F35;
    LINFlexD_0.IFCR[3].R = 0x1D35;

    LINFlexD_0.LINCR1.B.AUTOWU = 0x1u ;    // Enable the auto wake-up when the Rx Interrupt will coming
    LINFlexD_0.LINCR1.B.MBL = 0x3u ;
    LINFlexD_0.LINCR1.B.MME  = 0x0u ;    // set MME = 0 for salve mode
    LINFlexD_0.LINCR1.B.INIT = 0x0u ;      // Come out from LIN INIT mode

Please check the configuration that is correct or some other change must be needed ?

[PetrS]

Hi,

the configuration looks normal. Only you must be sure the module is in INIT mode before registers are set.

 Thus LINS status field should be checked, something like this

/* enter INIT mode */
  LINFlexD_0.LINCR1.B.INIT = 1 ;  // For configuration come in INIT mode
   LINFlexD_0.LINCR1.B.SLEEP = 0 ;   // Avoid the sleep mode

    /* wait for the INIT mode */
    while (0x1000 != (LINFlexD_0.LINSR.R & 0xF000)) {}

The instruction LINFlexD_0.LINCR2.R = 0x40 actually clears the LINCR2, reserved bits are written. If IOBE should be set use LINFlexD_0.LINCR2.R = 0x4000;

Then IFCR[3] is written twice, so second value is taken into account.

BR, Petr

[anishchoudhary]

  Hi

If i change line following line as per yours suggestion transmission also not happened :

           LINFlexD_0.LINCR2.R = 0x40u ; into 

           LINFlexD_0.LINCR2.R = 0x4000u;

so please make me sure which is right is above lines.