FCCU configuration failed

[haiquan_sun]

Hi，

I am trying to configure FCCU for MPC5745B. When I run OP1 operation after unlock the configuration, the operation status is always aborted. Can anyone help me to point out what I am doing wrong here?

The code I use looks like this:
/* Unlock configuration */
FCCU.TRANS_LOCK.R = 0xBC;
/* provide Config state key */
FCCU.CTRLK.R = 0x913756AF; //key for OP1
/* enter config state - OP1 */
FCCU.CTRL.R = 0x1; //set OP1 - set up FCCU into the CONFIG mode
/* wait for successful state transition */
while (FCCU.CTRL.B.OPS != 0x3);  //always aborted!!!

Best Regards.

[petervlna]

Hi,

My guess, you are using debugger and stepping in it.

The FCCU has SWT which will abort configuration phase.

Try to run over the code without stepping.

regards,

Peter

[haiquan_sun]

Hi,

You are right, I did use the debugger, but the breakpoints are set after all the necessary steps have been completed in order to see the values in the registers. And when I don't use the debugger, by observing the log output, the FCCU configuration is still not successful.

Best regards,

John

[petervlna]

Hi,

Hmm, and do you configure FCCU without any intervention? Like interrupt or any other than FCCU configuration instruction is executed.

Once you enter configuration state, no other than FCCU configuration code can be executed.

This is not a real issue.

Just have a look at my example codes:

https://community.nxp.com/docs/DOC-329719 

regards,

Peter

[haiquan_sun]

Hi，

I think there is no interrupt or other instruction being executed, the code I used is as follows, is there anything wrong here?

void FCCU_Init()
{
   FCCU->TRANS_LOCK = 0xBC;
   FCCU->CTRLK = 0x913756AF;
   FCCU->CTRL = (FCCU->CTRL & ~FCCU_CTRL_OPR_MASK) | FCCU_CTRL_OPR(0x01);
   while(((FCCU->CTRL & FCCU_CTRL_OPS_MASK) >> FCCU_CTRL_OPS_SHIFT) != 0x03);

   FCCU->NCF_E[0] = 0xFFFFFFFF;
   FCCU->NCF_TOE[0] = 0x00FF8000;
   FCCU->IRQ_ALARM_EN[0] = 0x00FF8000;

   FCCU->CTRLK = 0x825A132B;
   FCCU->CTRL = (FCCU->CTRL & ~FCCU_CTRL_OPR_MASK) | FCCU_CTRL_OPR(0x02);
   while(((FCCU->CTRL & FCCU_CTRL_OPS_MASK) >> FCCU_CTRL_OPS_SHIFT) != 0x03);
}

Best regards

John

[petervlna]

If you will share with me your code I can check where is the issue.

Otherwise its hard to help here.

This is correct procedure:

void FCCU_CONFIG (void)
{
  /* Unlock configuration */
  FCCU.TRANS_LOCK.R = 0xBC;  

/* provide Config state key */
  FCCU.CTRLK.R = 0x913756AF;           //key for OP1
  /* enter config state - OP1 */
  FCCU.CTRL.R = 0x1;                  //set OP1 - set up FCCU into the CONFIG mode
  /* wait for successful state transition */
  while (FCCU.CTRL.B.OPS != 0x3); //operation status successful
 
  /**************************************/
  /* Insert here the FCCU configuration */
  /**************************************/
   
  /* set up the NOMAL mode of FCCU */
  FCCU.CTRLK.R = 0x825A132B;           //key for OP2  
  FCCU.CTRL.R = 0x2;                  //set the OP2 - set up FCCU into the NORMAL mode
  while (FCCU.CTRL.B.OPS != 0x3); //operational status successful
   
}//FCCU_CONFIG

[haiquan_sun]

I created a new project, and everything is worked!There may be problems in the original project.Thank you very much for your answers, and wish you a happy today!

Best regards

John