data_send.c

瑞萨CAN通讯单片机程序

/*""FILE COMMENT""*****************************************************
 *	M32R C Programming		Rev. 1.00
 *		 < Sample Program for CAN data_send >
 *
 *	Copyright (c) 2003 Renesas Technology Corporation
 *			   And Renesas Solutions Corporation
 *			   All Rights Reserved
 *********************************************************************/

/************************************************************************/
/*		Include file						*/
/************************************************************************/

#include		"..\inc\sfr32170_pragma.h"

/************************************************************************/
/*		Function prototype declaration				*/
/************************************************************************/

	void		main(void);
	void		data_send(void);
extern	void		can_init(void);

/*""FUNC COMMENT""*******************************************************
 * Function name: void main(void)
 *-----------------------------------------------------------------------
 * Description	: Data frame transmission sample program
 *-----------------------------------------------------------------------
 * Argument	: -
 *-----------------------------------------------------------------------
 * Returns	: -
 *-----------------------------------------------------------------------
 * Notes	: -
 *""FUNC COMMENT END""***************************************************/
void main(void)
{
	/* Initializing CAN module */
	can_init();

	/* Testing CAN data frame transmission */
	data_send();

	while( 1 )
		;
}

/*""FUNC COMMENT""*******************************************************
 * Function name: void data_send(void)
 *-----------------------------------------------------------------------
 * Description	: Data frame transmission sample program
 *-----------------------------------------------------------------------
 * Argument	: -
 *-----------------------------------------------------------------------
 * Returns	: -
 *-----------------------------------------------------------------------
 * Notes	:
 *""FUNC COMMENT END""***************************************************/
void data_send(void)
{
	C0MSL0CNT = 0x00;			/* Initialize CAN message slot control register */
	while ( ( C0MSL0CNT & TRSTAT) != 0)	/* Verify that transmit operation is idle */
	;

	/* Set ID, DLC, and data in message slot 0 */
	C0MSL0SID0 = 0x00;			/* ID : 0 */
	C0MSL0SID1 = 0x00;
	C0MSL0DLC = 0x02;			/* DLC : 2 */
	C0MSL0DT0 = 0xc1;			/* DATA : 0xc1c2 */
	C0MSL0DT1 = 0xc2;

	/* Setting extended ID register */
	CAN0EXTID = 0x0000;			/* Select standard format */

	/* Setting CAN message slot control register */
	C0MSL0CNT = 0x80;			/* Request transmission of data frame */
}