Renesas Asynchronous SH7145F - Manual (Page 16)

SH7145F
Asynchronous Serial Data Transmission/Reception
REJ06B0357-0100O/Rev.1.00 March 2004 Page 16 of 17
P_SCI1.SSR_1.BIT.RDRF = 0; /* Clear RDRF */
trans_sci(Rev_data[rev_count]); /* Transmit receive data */
rev_count++ ; /* Increment storage address */
return(rev_count);
}
/************************************************************************/
/* Function : trans_sci */
/* Operation : Write 1 character to serial output */
/* Argument : trans_data */
/* Value returned : None */
/************************************************************************/
void trans_sci(char tarans_data) {
while(!(P_SCI1.SSR_1.BYTE & 0x80)){ /* Wait until data can be written to TDR */
; /* (until TDRE is set to 1) */
}
P_SCI1.TDR_1 = (unsigned char)trans_data; /* Write data to TDR */
P_SCI1.SSR_1.BYTE &= 0x7F; /* Clear flag, transmit */
}
/**************************************
Interrupt handling
**************************************/
#pragma interrupt(err_int)
void err_int(void)
{
if(P_SCI1.SSR_1.BIT.ORER == 1){ /* Overrun error */
P_SCI1.SSR_1.BIT.ORER = 0; /* ORER flag clear */
}
if(P_SCI1.SSR_1.BIT.FER == 1){ /* Framing error */
P_SCI1.SSR_1.BIT.FER = 0; /* FER flag clear */
}
if(P_SCI1.SSR_1.BIT.PER == 1){ /* Parity error */
P_SCI1.SSR_1.BIT.PER = 0; /* PER flag clear */
}
}
#pragma interrupt(dummy_f)
void dummy_f(void)
{
/* Other Interrupt */
}