csio_main.c

瑞萨CAN通讯单片机程序

/*""FILE COMMENT""*****************************************************
 *	M32R C Programming		Rev. 1.00
 *		 < Sample Program for Serial I/O (CSIO) (main routine) >
 *
 *	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);				/* Main function */
	void		init_func(void);			/* Initial setup function */
	void		port_init(void);			/* Initialize port */

/************************************************************************/
/*		Externally referenced variable				*/
/************************************************************************/

extern	void		DisInt( void );				/* Interrupt disable function */
extern	void		EnInt( void );				/* Interrupt enable function */

extern	void		SIO0_CLKTinit( void);			/* Initialize SIO0 */
extern	void		SIO1_CLKRinit( void);			/* Initialize SIO1 */
extern	void		SIO0_Tr( unsigned char *, unsigned int);	/* Transmit from SIO0 */

/************************************************************************/
/*		Global variable						*/
/************************************************************************/

	unsigned char	RcvBuf1[10];				/* Receive buffer */
	unsigned char	rx_cnt1;				/* Pointer to receive buffer */

/*""FUNC COMMENT""*******************************************************
 * Function name: init_func()
 *------------------------------------------------------------------------
 * Description	: Call various initialization functions
 *------------------------------------------------------------------------
 * Argument	: -
 *------------------------------------------------------------------------
 * Returns	: -
 *------------------------------------------------------------------------
 * Notes	:
 *""FUNC COMMENT END""***************************************************/
void init_func(void)
{
	port_init();						/* Initialize port */
}

/*""FUNC COMMENT""*******************************************************
 * Function name: port_init()
 *------------------------------------------------------------------------
 * Description	: Initialize port
 *------------------------------------------------------------------------
 * Argument	: -
 *------------------------------------------------------------------------
 * Returns	: -
 *------------------------------------------------------------------------
 * Notes	:
 *""FUNC COMMENT END""***************************************************/
void port_init(void)
{
	PIEN = PIEN0;						/* Enable port input */

/*** LED output port ***/

	P11DATA = 0x00;						/* Output data (must be set prior to mode) */
	P11DIR = 0xff;						/* P110-P117 : Output mode */
	P11MOD = 0x00;						/* P110-P117 : Input/output port */
}

/*""FUNC COMMENT""*******************************************************
 * Function name: main()
 *-----------------------------------------------------------------------
 * Description	: Input/output portReceives data (increment pattern) from SIO1 after being transmitted in 500 Kbps
 *		: clock-synchronized serial mode (when the source clock frequency = 10 MHz) from SIO0 and
 *		: if the received data is the same as transmitted, displays it on LED(port 11).
 *		: If unable to receive the same data, it displays 0x55 in blinking inverse video.
 *-----------------------------------------------------------------------
 * Argument	: -
 *-----------------------------------------------------------------------
 * Returns	: -
 *-----------------------------------------------------------------------
 * Notes	: Dummy transmission is required for data to be received from SIO1
 *""FUNC COMMENT END""***************************************************/
void	main(void)
{
	unsigned char	i;
	unsigned long	j;
	unsigned char	data;
	unsigned char	rx_cnt1_bak;

	rx_cnt1 = rx_cnt1_bak = 0;

	i = 0;

	DisInt();						/* Disable interrupt */

	init_func();						/* Initialize microcomputer */

	SIO0_CLKTinit();					/* Initialize SIO0 */
	SIO1_CLKRinit();					/* Initialize SIO1 */

	EnInt();						/* Enable interrupt */

	while(1) {
		S1TXB_L = rx_cnt1;				/* Dummy write */
		SIO0_Tr( &i, 1);				/* Send data from SIO0 */

		while( rx_cnt1 == rx_cnt1_bak);			/* Wait for data to receive */
		data = RcvBuf1[ rx_cnt1 - 1];			/* Read out received data */

		if( rx_cnt1 == 10) {				/* Check for receive counter overflow */
			rx_cnt1 = 0;
		}
		rx_cnt1_bak = rx_cnt1;

		if( data == i) {
			P11DATA = data;				/* Display received (transmitted) data */
			i++;					/* Increment transmit data */
		} else {					/* Received data in error */
			P11DATA = 0x55;
			while(1) {
				for( j = 0; j < 1000000; j++);	/* Wait */
				P11DATA ^= 0xff;		/* Display 0x55 in blinking inverse video */
			}
		}
	}
}