Problem with LINFlexD LIN frame transmit

[xinweichang]

Below is a LIN frame transmit function, when I run it on 5748G with single step mode, it always stuck here: while(0 == LINFlexD_1.LINSR.B.DTF). Could I missed something at the initial mode?

void TransmitData(uint16_t bidr_value)

{

    /* store the data in the message buffer BDR */

    LINFlexD_1.BDRL.B.DATA0 = 'H';

    LINFlexD_1.BDRL.B.DATA1 = 'e';

    LINFlexD_1.BDRL.B.DATA2 = 'l';

    LINFlexD_1.BDRL.B.DATA3 = 'l';

    LINFlexD_1.BDRM.B.DATA4 = 'o';

    LINFlexD_1.BDRM.B.DATA5 = '!';

    LINFlexD_1.BDRM.B.DATA6 = '!';

    LINFlexD_1.BDRM.B.DATA7 = '!';

    /* Master to publish x bytes with ID and CCS from bidr_value */

    LINFlexD_1.BIDR.R = bidr_value;

    /* Trigger Frame transmission */

    LINFlexD_1.LINCR2.B.HTRQ = 1;   

    /* wait until Master response to the LIN header has been sent successfully */

    while(0 == LINFlexD_1.LINSR.B.DTF)

    {

        /* track LIN Status for errors */

    }

    LINFlexD_1.LINSR.R = 0x0002; /* clear the DTF bit */

}

[martin_kovar]

Hi,

about the code, please check this example. It shows, how to use LINFlexD module. Example is created for MPC5744P, but the modules are similar.

Example MPC5744P LIN Master Slave test GHS614

Check also SIUL2 configuration and jumper settings (SIUL2 configuration will be probably different from example above).

Regards,

Martin

[xinweichang]

I think no LIN frame was sent out after HTRQ was set