MPC5748G UART misses a printf character

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MPC5748G UART misses a printf character

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kfirbs
Contributor III

 

Trying to set baudrate of uart to 115200 on DEVKIT for MPC5748G, is missing a character once in a while, according to my calculation the baudrate is 115273 when the mantissa is 43 and fraction 6, psb:

void uart_init()
{
    uint32_t Fraction;
    uint32_t Integer;

    LINFlexD_2.LINCR1.B.INIT = 1;  /* Enter Initialization Mode */
    LINFlexD_2.LINCR1.B.SLEEP = 0; /* Exit Sleep Mode */
    LINFlexD_2.UARTCR.B.UART = 1;  /* UART Enable, Req'd before UART configuration */
    LINFlexD_2.UARTCR.B.RxEn = 1;
    LINFlexD_2.UARTCR.B.TxEn = 1;
    LINFlexD_2.UARTCR.B.RFBM = 0;
    LINFlexD_2.UARTCR.B.WL0 = 0x1;
    LINFlexD_2.UARTCR.B.PCE = 1;
    //LINFlexD_2.UARTCR.R = 0x0033;     /* UART Enable, 1 byte tx, no parity, 8 data*/
    LINFlexD_2.UARTSR.B.SZF = 1;    /* CHANGE THIS LINE   Clear the Zero status bit */
    LINFlexD_2.UARTSR.B.DRFRFE = 1; /* CHANGE THIS LINE  Clear DRFRFE flag - W1C */

    BaudRate = (80 * 1000000) / 115200;
    Integer = BaudRate / 16;
    Fraction = BaudRate - (Integer * 16);

    LINFlexD_2.LINIBRR.R = Integer;
    LINFlexD_2.LINFBRR.R = Fraction;
    LINFlexD_2.LINCR1.B.INIT = 0; /* Exit Initialization Mode */

    SIUL2.MSCR[PC8].B.SSS = 1; /* Pad PC8: Source signal is LIN2_TX  */
    SIUL2.MSCR[PC8].B.PUS = 1; /* by Kfir: Tx need to be pulled up - prevent junk chars  */
    SIUL2.MSCR[PC8].B.PUE = 1; /* by Kfir: Tx need to be pulled up - prevent junk chars  */
    SIUL2.MSCR[PC8].B.OBE = 1; /* Pad PC8: OBE=1. */
    SIUL2.MSCR[PC8].B.src=3; /* Pad PC8: Full strength slew rate */
    SIUL2.MSCR[PC9].B.IBE = 1; /* Pad PC9: Enable pad for input */
    SIUL2.IMCR[202].B.SSS = 2; /* LIN2_RX : connected to pad PC9 */
}

 

The character miss happens both when putty is set to 115200 and 115273.

example:

"result": "PASS", "file": "

output:

"rsult": "PAS", "file":

What can be the reason?

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