topic Re: Problem with LINFlexD LIN frame transmit in MPC5xxx

Problem with LINFlexD LIN frame transmit

xinweichang — Tue, 15 Mar 2016 01:44:08 GMT

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 */

}

Re: Problem with LINFlexD LIN frame transmit

xinweichang — Tue, 15 Mar 2016 06:24:37 GMT

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

Re: Problem with LINFlexD LIN frame transmit

martin_kovar — Tue, 15 Mar 2016 06:31:12 GMT

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