SH7047F Datasheet, PDF (16/85 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7047 Series

1.8 Reception Program Listing
/********************************************************************************/
/*
HCAN-2 Reception Program (Example 1)
*/
/********************************************************************************/
#include <stdio.h>
/* Library function header file */
#include <machine.h>
/* Library function header file */
#include "SH7047.h"
/* Peripheral register definition header file */
/********************************************************************************/
/*
Function prototype declarations
*/
/********************************************************************************/
void r_main(void );
/********************************************************************************/
/*
Define constants
*/
/********************************************************************************/
#define MBbuff (*(unsigned char *)0xFFFFD100) /* Storage for mailbox 0 reception
data */
/********************************************************************************/
/*
Main routine
*/
/********************************************************************************/
void r_main(void){
unsigned short *work;
/* Initialize storage area for received data */
MBbuff = 0x00;
/* Clear bit MCR0 */
HCAN_MCR = 0x0000;
/* Clear reset request bit */
/* Set local acceptance filter */
HCAN_MB0.LAFM15 = 0x0000;
/* Set identifier filter mask for mailbox 0 */
/* Clear bit IRR0 */
HCAN_IRR = 0x0001;
/* Clear reset interrupt flag (to clear, write 1) */
/* Set pins */
PB.PBCR1 = 0x0000;
/* Set PB HCAN-2 */
PB.PBCR2 = 0x000F;
/* Set PB HCAN-2 */
/* Set bit rate (BCR): bit rate is 250 kbps when φ = 50 MHz */
HCAN_BCR0 = 0x0009;
/* BRP=9(10 system clock) */
HCAN_BCR1 = 0x4300;
/* TSEG1=4(5tq),TSEG2=3(4tq) */
/* Initialize mailbox */
work = (unsigned short *)0xFFFFB100;
do {
*work = 0xFFFF;
work++;
} while(work < (unsigned short *)0xFFFFB4F4);
/* Set MBC */
HCAN_MB0.MC4 = 0x03;
/* Set mailbox 0 as for reception */
/* Set reception method */
HCAN_MB0.MC0 = 0x5550;
/* Select data frame and standard
format, set identifier */
HCAN_MB0.MC5 = 0x01;
/* Set data length: 1 byte */
/* Wait for reception end */
while((HCAN_RXPR0 & 0x0001) != 0x0001); /* Wait for reception end */
Rev. 1.00, 08/03, page 8 of 74