Clock Synchronous Serial I/O Mode - von Gunthard Kraus

R8C/10, R8C/11, R8C/12, R8C/13 Group
Serial I/O Operation (Clock Synchronous Serial I/O Mode)
/************************************************************************************
Name: Cs_sral
Parameters: None
Returns: None
Description: Clock synchronous sereial I/O
************************************************************************************/
void Cs_sral(void){
unsigned short rcv_work;
/* Store a receive data to receive data buffer from receive register */
if ((serial_cnt >= 1) && (serial_cnt < 10 + 1)){
rcv_work = u0rb;
rcv_buf[serial_cnt - 1] = (unsigned char)rcv_work; /* Get Reception data */
}
/* Set a send data to send register from send data buffer */
if (serial_cnt < 10){
u0tbl = trn_buf[serial_cnt]; /* Set send data */
te_u0c1 = 1; /* Transmission enabled */
}
}
/* Set next send data point */
serial_cnt++; /* Increment counter */
if (serial_cnt == 10 + 4){
serial_cnt = 0; /* Clear counter */
}
REJ05B0452-0110Z/Rev.1.10 August 2004 Page 8 of 11