INIT UART LINFlex_0 gives IVOR1 error MPC5744P

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INIT UART LINFlex_0 gives IVOR1 error MPC5744P

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prasan
Contributor I

We are testing UART of MPC5744P

we didn't  get any error while using channel 1 " initLINFlexD_1" 

but for initLINFlexD_0,  we are getting IVOR1 error at Register 0x1001010.

It is stopping at

void initLINFlexD_0 ( unsigned int MegaHertz, unsigned int BaudRate ) {
  unsigned int Fraction;
  unsigned int Integer;

  LINFlexD_0.LINCR1.B.INIT = 1;     /* Enter Initialization Mode */ ///////////////STOPPING HERE//////////////////


  LINFlexD_0.LINCR1.B.SLEEP = 0;    /* Exit Sleep Mode */
  LINFlexD_0.UARTCR.B.UART = 1;     /* UART Enable- Req'd before UART config.*/
  LINFlexD_0.UARTCR.R = 0x0033;     /* UART Ena, 1 byte tx, no parity, 8 data*/
  LINFlexD_0.UARTSR.B.SZF = 1;      /* CHANGE THIS LINE   Clear the Zero status bit */
  LINFlexD_0.UARTSR.B.DRFRFE = 1;   /* CHANGE THIS LINE  Clear DRFRFE flag - W1C */

  BaudRate  = (MegaHertz * 1000000) / BaudRate;
  Integer   = BaudRate / 16;
  Fraction  = BaudRate - (Integer * 16);

  LINFlexD_0.LINIBRR.R = Integer;
  LINFlexD_0.LINFBRR.R = Fraction;

  LINFlexD_0.LINCR1.B.INIT = 0;     /* Exit Initialization Mode */

  UARTFirstTransmitFlag_0 = 1;        /* Indicate no Tx has taken place yet */

  /* Configure LINFlexD_0 TxD Pin. */
  SIUL2.MSCR[PB2].B.SSS = 0b0001; //Pad PF14: Set to LINFlex_0 TxD. Must choose this option because F14 leads to LIN PHY of motherboard
  SIUL2.MSCR[PB2].B.OBE = 1; //Enable output buffer
  SIUL2.MSCR[PB2].B.SRC = 3; //Full drive-strength without slew rate control

  /* Configure LINFlexD_0 RxD Pin. */
  SIUL2.MSCR[PB3].B.IBE = 1; //Pad PF15: Enable input buffer
  SIUL2.IMCR[165].B.SSS = 0b0001; //Connect LINFlexD_0 signal to PTB3
}

Did anybody faced this error, if yes how to solve it?

Thanks in advance,

Vella

1 Reply

185 Views
PetrS
NXP TechSupport
NXP TechSupport

Hi,

do you have LINFlex_0 clocked through ModeEntry module?

You can refer to this example https://community.nxp.com/docs/DOC-104681 

BR, Petr