SH7047F Datasheet, PDF (13/85 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7047 Series

1.5 Transmission Program Listing
/********************************************************************************/
/*
HCAN-2 Transmission 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 t_main(void );
/********************************************************************************/
/*
Main routine
*/
/********************************************************************************/
void t_main(void){
unsigned short *work;
/* Clear bit MCR0 */
HCAN_MCR = 0x0000;
/* Clear reset request bit */
/* 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_MB1.MC4 = 0x01;
/* Set mailbox 1 as for transmission */
/* Set transmission method */
HCAN_MB1.MC0 = 0x5550;
/* Select data frame and standard format,
set identifier */
HCAN_MB1.MC5 = 0x01;
/* Set data length: 1 byte */
/* Set transmission data */
HCAN_MB1.MD7 = 0xAA;
/* Set transmission data: 10101010 */
/* Set message transmission wait status */
HCAN_TXPR0 = 0x0002;
/* Set mailbox 1 to transmission wait status */
/* Wait for transmission end */
while((HCAN_TXACK0 & 0x0002) != 0x0002);
/* Clear transmission end flag */
HCAN_TXACK0 = 0x0002; /* Clear transmission end flag (to clear, write 1) */
while(1);
}
Rev. 1.00, 08/03, page 5 of 74