/***********************************************************************************
FILE NAME		main_repeat.c
***********************************************************************************/

/***********************************************************************************
User Includes
***********************************************************************************/
/*	Following header file provides a structure to access on-chip I/O registers.	*/
#include "sfr_r81b.h"
/*	Following header file provides common defines for widely used items.	*/
#include "rskR8C1Bdef.h"
/*	Following header file provides prototype for the functions defined in this
	file. */
#include "main_repeat.h"

/***********************************************************************************
Global variables
***********************************************************************************/
long t;

/***********************************************************************************
User Program Code
***********************************************************************************/

/***********************************************************************************
Function Name : main
Description   :	main function.
***********************************************************************************/
void main(void)
{
	t=0;
	sfr_init();		// initialize SFR
	ssu_init();		// initialize SSU
	
	p1_2 = 0;
	
	ssu_transmit();	// initialize SSU transmission

	prcr = 0x0b;
	asm("FSET I");

	p1_4 = 0;
	
	/* Main loop */
	while(1){												/* Main processing */

	}

}
/***********************************************************************************
End of function main
***********************************************************************************/

/***********************************************************************************
Function Name : ssu_init
***********************************************************************************/
void ssu_init(void)
{
	re_sser 	= 0;	// receive disabled
	te_sser 	= 0;	// transmit disabled
	
	cphs_ssmr 	= 0;	// clock phase : odd edge
	cpos_ssmr 	= 0;	// clock polarity : "H"
	mls_ssmr 	= 1;	// LSB first
	
	mss_sscrh 	= 1;	// master device
	
	scks_ssmr2	= 1;	// SCKS = Serial Clock pin
	soos_ssmr2	= 0;	// serial data open drain : CMOS
	ssums_ssmr2	= 0;	// *** SSU
	sckos_ssmr2	= 0;	// *** CMOS ouput
	
	sscrl		= 0x20;	// *** "H" after output
	
	cks0_sscrh	= 0;	// clockrate selcet :
	cks1_sscrh	= 1;	// 1 1 0 => 
	cks2_sscrh	= 1;	//			f/4
	rsstp_sscrh	= 0;	// receive >= 1 byte
	
	orer_sssr	= 0;	// No error overrun

	re_sser 	= 0;	// receive disabled
	te_sser 	= 1;	// transmit enabled
	rie_sser 	= 0;	// receive interrupt disabled
	tie_sser 	= 0;	// transmit interrupt enabled
	teie_sser 	= 0;	// transmit end interrupt enabled
}
/***********************************************************************************
End of function ssu_init
***********************************************************************************/

/***********************************************************************************
Function Name : ssu_transmit
***********************************************************************************/
void ssu_transmit(void)
{
	sstdr = 0B00111111;	// data present in sstdr register
	wait();
	sstdr = 0B11111111;	// data present in sstdr register
	wait();
	sstdr = 0B00001111;	// data present in sstdr register
	wait();
	sstdr = 0B11110000;	// data present in sstdr register
	wait();
	
}
/***********************************************************************************
End of function ssu_transmit
***********************************************************************************/

/***********************************************************************************
Function Name : sfr_init
***********************************************************************************/
void sfr_init(void)
{
	/* Port */
	p1 = 0B11111111;      /* Port P1 initial setting = "H" */
	p3 = 0B11111111;      /* Port P3 initial setting = "H" */
	p4 = 0B11111111;      /* Port P4 initial setting = "H" */

	/* Port direction */
	pd1 = 0B11111111;		/* Port P1 direction = output */
	pd3 = 0B11111111;	    /* Port P3 direction = output */
	pd4 = 0B11111111;		/* Port P4 direction = output */

	/* Timer */
	tzck0 = 1;		/* Division : Timer Z count sorce = f8 is selected */
	tzck1 = 0;		/* Division : Timer Z count sorce = f8 is selected */

	/* Timer Z */	/* Mian cycle is generated by the timer Z interrupt */
	tzmr = 0x00;	/* Timer mode is selected / timer count stop */
	pum = 0x00;		/* "TZOPL" : Set to "0" when time mode is selected */
	prez = 25-1;	/* Timer Z prescaler : Set 25-1 (20MHz * f8 * 25 = 10usec) */
	tzsc = 0x00;	/* Timer Z secondary : Unused in timer mode */
	tzpr = 25-1;	/* Timer Z primary : Set 25-1 (10usec * 25 = 250usec) */

	/* Interrupt registers */
	tzic = 0x02;	/* Timer Z interrupt : Priority level-2 is selected , Interrupt request bit = clear */

	/* Timer count start bit */
	tzs = 1;		/* Timer Z count start bit = start */

	
	ssisel	= 0;	// SSI => P3_3
	iicsel	= 0;	// SSU selected
	
}
/***********************************************************************************
End of function sfr_init
***********************************************************************************/

/***********************************************************************************
Function Name : wait
***********************************************************************************/
void wait(void)
{
	asm("NOP");
	asm("NOP");
	asm("NOP");
	asm("NOP");
	asm("NOP");
	asm("NOP");
	asm("NOP");
	asm("NOP");
	asm("NOP");
	asm("NOP");
}
/***********************************************************************************
End of function wait
***********************************************************************************/

/************************************************************************************
Name		:timer_z_int
Description	:Main timer make. Timer Z interrupt(250usec)
************************************************************************************/
void timer_z_int(void)
{
	asm("FSET I");											/* Interrupt enable */
}	
/***********************************************************************************
End of timer_z_int
***********************************************************************************/