Renesas Asynchronous SH7145F Bedienungsanleitung PDF herunterladen (Seite 18)

SH7145 Group

SCI Break Detection

REJ06B0384-0100Z/Rev.1.00 September 2004 Page 18 of 20

/***********************************************************************************************/

/* Function : err */

/* Operation : error judging(SCI0) */

/* Asynchronous Receive Mode */

/***********************************************************************************************/

void err(void)

{

if(P_SCI0.SSR_0.BIT.ORER == 1){ /* Overrun error */

P_SCI0.SSR_0.BIT.ORER = 0; /* Clear ORER flag */

}

if(P_SCI0.SSR_0.BIT.FER == 1){ /* Framing error */

if(P_PORTA.PADRL.BIT.PA0DR == 0){

P_CMT.CMSTR.BIT.STR = 1; /* CMT0 count start */

while(T_count != 0); /* Wait until T_count = 0 */

if(Rd_count == 3){ /* Break detect (Rd_count==3) */

P_SCI0.SCR_0.BIT.RE = 0; /* RE=0,receive disable */

}

P_SCI0.SSR_0.BIT.FER = 0; /* Clear FER flag */

}

if(P_SCI0.SSR_0.BIT.PER == 1){ /* Parity error */

P_SCI0.SSR_0.BIT.PER = 0; /* Clear PER flag */

}

/***********************************************************************************************/

/* Interruption Program */

/***********************************************************************************************/

/* CMT0 Interruption Program */

/***********************************************************************************************/

#pragma interrupt(cmt_int)

void cmt_int(void)

{

P_CMT.CMCSR_0.BIT.CMF = 0; /* Clear CMF flag */

/* Read RxD-pin level */

if(P_PORTA.PADRL.BIT.PA0DR == 0){ /* RxD-pin level is low */

Rd_count++; /* Count */

}

T_count--; /* Count interrupt times */

/* Judging interrupt times */

if(T_count == 0){ /* 3 times interrupt */

P_CMT.CMSTR.BIT.STR = 0; /* CMT_0 count stop */

}

/***********************************************************************************************/

/* Other Interruption Program */

/***********************************************************************************************/

#pragma interrupt(dummy_f)

void dummy_f(void)

{

/* Other Interrupt */

}

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