Hi,
I'm using LinFlexD on MPC5744P EV-board.
configured MPC5744P as slave, PLIN hardware [with monitor software, able to configure as master and slave modes] as Master.
Flashed the S32 design studio LINFLexD_LIN_Slave_MPC5744P example code to EV board. and trying to send data from PLIN viewer to MPC5744P. Did not get any response from Slave.
Program struck in while(!(LINFlexD_0.LINSR.B.HRF)); /* Wait for header to be received */
//INIT Function
void initLINFlexD_0 (void) { /* Slave at 10.417K baud with 80MHz LIN_CLK */
LINFlexD_0.LINCR1.B.INIT = 1; /* Put LINFlex hardware in init mode */
LINFlexD_0.LINCR1.R= 0x00000301; /* Configure module as LIN slave */
LINFlexD_0.LINIBRR.B.IBR= 480; /* Mantissa baud rate divider component */
/* Baud rate divider = 80 MHz LIN_CLK input / (16*10417K bps) ~=480 */
LINFlexD_0.LINFBRR.B.FBR = 0; /* Fraction baud rate divider comonent */
LINFlexD_0.LINCR2.R = 0x40; /* IOBE=1, Bit error resets LIN state machine */
LINFlexD_0.LINTCSR.R = 0; /* LIN timeout mode, no idle on timeout */
LINFlexD_0.BIDR.B.CCS = 0; /* enhanced checksum for LIN Slave */
LINFlexD_0.LINIER.R = 0x7; // enable RX, TX and header interrupt
LINFlexD_0.LINCR1.R = 0x00000380;
/* Configure LINFlexD_0 TxD Pin. */
SIUL2.MSCR[PB2].B.SSS = 0b0001; //Pad PF14: Set to LINFlex_1 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_2 signal to PF15
}
// Receive function
void receiveLINframe_0 (void) { /* Request data from ID 0x15 */
uint8_t i;
while(!(LINFlexD_0.LINSR.B.HRF)); /* Wait for header to be received */
/* Read the identifier. Look for ID=0x35 */
if(LINFlexD_0.BIDR.B.ID == 0x35){
LINFlexD_0.LINSR.R |= 0x00000001; /* Clear the HRF flag */
/* If ID=0x35, receive bytes from master. Configure the data length */
LINFlexD_0.BIDR.B.DFL = 7; //Receive 8 bytes. DFL = number of data bytes - 1 = 8-1 = 7
/* Configure checksum for enhanced checksum */
LINFlexD_0.BIDR.B.CCS = 0;
/* Configure to receive */
LINFlexD_0.BIDR.B.DIR = 0;
/* Wait for DRF bit to be set */
while(!(LINFlexD_0.LINSR.B.DRF));
/* Read the data bytes */
for (i=0; i<4;i++){ /* If received less than or equal 4 data bytes */
RxBuffer[i]= (LINFlexD_0.BDRL.R>>(i*8)); /* Fill buffer in reverse order */
}
for (i=4; i<8;i++){ /* If received more than 4 data bytes: */
RxBuffer[i]= (LINFlexD_0.BDRM.R>>((i-4)*8)); /* Fill rest in reverse order */
if(RxBuffer[i]){}
}
/* Clear DRF and release message buffer */
LINFlexD_0.LINSR.R = 0x00000204;
TransmitData((const char*)Message2,strlen((const char*)Message2));
TransmitData((const char*)RxBuffer,8);
TransmitData((const char*)newline,strlen((const char*)newline));
/* Read the identifier. Look for ID=0x15 */
}else if(LINFlexD_0.BIDR.B.ID == 0x15){
/* If ID=0x15, send btyes to master.
* Fill the buffer with "World ".
*/
LINFlexD_0.BDRL.B.DATA0 = 'W';
LINFlexD_0.BDRL.B.DATA1 = 'o';
LINFlexD_0.BDRL.B.DATA2 = 'r';
LINFlexD_0.BDRL.B.DATA3 = 'l';
LINFlexD_0.BDRM.B.DATA4 = 'd';
LINFlexD_0.BDRM.B.DATA5 = ' ';
LINFlexD_0.BDRM.B.DATA6 = ' ';
LINFlexD_0.BDRM.B.DATA7 = ' ';
/* Wait for LINSR[RXbusy] to clear. Cannot set
* DIR and DTRQ if RXbusy is set.
*/
while(LINFlexD_0.LINSR.B.RXbusy);
/* Program CCS and DIR */
LINFlexD_0.BIDR.B.CCS = 0; //Enhanced checksum
LINFlexD_0.BIDR.B.DIR = 1; //Send bytes to master
/* Specify number of bytes to send */
LINFlexD_0.BIDR.B.DFL = 7; //Send 8 bytes. DFL = number of data bytes - 1 = 8-1 = 7
/* Trigger data transmission */
LINFlexD_0.LINCR2.R |= 0x00000400; //Set LINCR2[DTRQ] to transmit data
/* Clear HRF finally. DTRQ must be set while HRF=1
* in order to prevent random setting of DTRQ.
*/
LINFlexD_0.LINSR.R |= 0x00000001;
/* Wait for transmission to complete */
while(!(LINFlexD_0.LINSR.B.DTF));
/* Clear DTF */
LINFlexD_0.LINSR.R |= 0x00000002;
/* Print the message */
TransmitData((const char*)Message1,strlen((const char*)Message1));
}
}
- EV-board as master, PLIN Viewer as slave. tried to send data and able to receive data in PLIN Viewer.
- PLIN as master and EV-board as slave, slave not responding when sending data from master to slave. Slave not responding.
Captured the break + sync+ protected ID when probing the LIN line using oscilloscope.
Please help me with this problem.
Reference image
LIN Configuration Register Values:
LIN status register
LIN Error status register
Thanks, and Regards
Vennila
