MPC5645S eMIOS_SAIC problem

weiguoyan — Mon, 19 Sep 2016 00:43:20 GMT

Hi,

I am using the MPC5645S. I use the channel 20 and channel 21 of the eMIOS1 with SAIC mode. Two channels register configuration and initialize are the same. but the channel 21 can capture the input frequency signal and enter the interrupt .The channel 20 can't enter the interrupt.

who can help me to solve this problem.

Thanks!

void EMIOS1Init(void)
{
EMIOS_1.MCR.B.GPRE = 255; // 64M/256=250kHz
EMIOS_1.MCR.B.GPREN = 1;
EMIOS_1.MCR.B.FRZ = 1;
}// end of EMIOS1Init

void CounterBusAInit(void)
{
EMIOS_1.CH[23].CADR.R = 0xFFFF;
EMIOS_1.CH[23].CCR.B.MODE = 0x50;
EMIOS_1.CH[23].CCR.B.BSL = 0x3;
EMIOS_1.CH[23].CCR.B.UCPRE = 0x1; // 250k/2 =125kHz
EMIOS_1.CH[23].CCR.B.UCPEN = 1;
EMIOS_1.CH[23].CCR.B.FREN = 1;
EMIOS_1.CH[23].CCR.B.FEN = 1;
}// end of CounterBusAInit

void ICInit(void)
{
UBYTE i;
SIU.PCR[PF1].R = 0x0500; // EMIOS1-20
SIU.PCR[PF3].R = 0x0500; // EMIOS1-21
EMIOS1Init();
for( i=20;i<22;i++ )
{
EMIOS_1.CH[i].CCR.B.MODE = 0x02; // SAIC mode
EMIOS_1.CH[i].CCR.B.BSL = 0x00;
EMIOS_1.CH[i].CCR.B.IF = 0x02;
EMIOS_1.CH[i].CCR.B.FCK = 1;
EMIOS_1.CH[i].CCR.B.FEN = 1;
EMIOS_1.CH[i].CCR.B.DMA = 0;
EMIOS_1.CH[i].CCR.B.EDSEL = 0;
EMIOS_1.CH[i].CCR.B.EDPOL = 1;
EMIOS_1.CH[i].CCR.B.UCPRE = 0;
EMIOS_1.CH[i].CCR.B.UCPEN = 1;
EMIOS_1.CH[i].CCR.B.FREN = 1;
}
CounterBusAInit();
INTC_InstallINTCInterruptHandler(ISR_SAIC20,169,3);
INTC_InstallINTCInterruptHandler(ISR_SAIC21,170,3);
INTC_InstallINTCInterruptHandler(ISR_EMIOS123OVFL,172,3);
}// end of ICInit

Re: MPC5645S eMIOS_SAIC problem

PetrS — Mon, 19 Sep 2016 07:28:09 GMT

Hi,

You have to route the pin PF1 to eMIOS1[20] with the help of SIU.PSMI register. See table 43-14 of the RM and set PSMI[44]=1.

BR, Petr

Re: MPC5645S eMIOS_SAIC problem

weiguoyan — Mon, 19 Sep 2016 08:53:27 GMT

Thank you for your answer. The problem is resolved.

Best wishes!

Re: MPC5645S eMIOS_SAIC problem

weiguoyan — Mon, 19 Sep 2016 08:54:29 GMT

Thank you for your answer.

The problem is resolved.

Best wishes!

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