/* 
 * Title       : f330.c
 * Description : C8051F330 subroutines
 * Author      : KAWAMOTO Yasuhisa
 * URL         : http://www.devdrv.co.jp/
 * Date        : 01/12/2006
 */
 
//-----------------------------------------------------------------------------
// Includes
//-----------------------------------------------------------------------------
#include <c8051f330.h>
#include "main.h"

//-----------------------------------------------------------------------------
// Global VARIABLES
//-----------------------------------------------------------------------------
volatile unsigned char tmr2_count;

//-----------------------------------------------------------------------------
// init_cygnal
//-----------------------------------------------------------------------------
void init_f330(void)
{
	// WatchDog Disable
	PCA0MD &= ~0x40;
	
	// Clock
	OSCICN = 0x83;
	RSTSRC = 0x04;
	
	// PORT
	// P0.0  DRIVE  -->  1-Wire
	// P0.1  SENSE  <--  1-Wire
	// P0.2  CTS    <--  XPORT
	// P0.3  DCD    <--  XPORT
	// P0.4  TX     -->  XPORT
	// P0.5  RX     <--  XPORT
	// P0.7  RTS    -->  XPORT
	// P2.0  LED    -->  LED
	XBR0    = 0x01;
	XBR1    = 0xC0;
	P0SKIP  = 0xCF;
	P1SKIP  = 0xFF;
	P0MDOUT = 0x91;
	P1MDOUT = 0xFF;
	P2MDOUT = 0x01;
	P0MDIN  = 0xFF;
	P1MDIN  = 0xFF;
	P0      = 0x00 | ~P0MDOUT;
	P1      = 0x00 | ~P1MDOUT;
	P2      = 0x01 | ~P2MDOUT;
	
	// UART0
	SCON0 = 0x10;
	if(SYSCLK/BAUDRATE/2/256 < 1)
	{
		TH1 = -(SYSCLK/BAUDRATE/2);
		CKCON |= 0x08;
	}
	else if(SYSCLK/BAUDRATE/2/256 < 4)
	{
		TH1 = -(SYSCLK/BAUDRATE/2/4);
		CKCON |=  0x01;
		CKCON &= ~0x0A;
	}
	else if(SYSCLK/BAUDRATE/2/256 < 12)
	{
		TH1 = -(SYSCLK/BAUDRATE/2/12);
		CKCON &= ~0x0B;
	}
	else
	{
		TH1 = -(SYSCLK/BAUDRATE/2/48);
		CKCON |=  0x02;
		CKCON &= ~0x09;
	}
	
	TL1 = 0xFF;
	TMOD |= 0x20;
	TMOD &= ~0xD0;
	TR1 = 1;
	TI0 = 1;
	
	// TIMER2
	TMR2CN  = 0x00;
	CKCON  &= ~0x30;
	TMR2RLL = (-TIMER2RATE*(SYSCLK/12)/1000);
	TMR2RLH = (-TIMER2RATE*(SYSCLK/12)/1000) >> 8;
	TMR2L   = 0xFF;
	TMR2H   = 0xFF;
	ET2     = 1;
	TR2     = 1;
}

//-----------------------------------------------------------------------------
// uart0_put_char
//-----------------------------------------------------------------------------
void uart0_put_char(char d)
{
	while(!TI0);
	TI0 = 0;
	
	while(CTS);
	
	SBUF0 = d;
}

//-----------------------------------------------------------------------------
// uart0_put_val
//-----------------------------------------------------------------------------
void uart0_put_val(unsigned char d)
{
	unsigned char c;
	
	c = ((d >> 4) & 0x0F);
	if(9 < c)
		c = c - 10 + 'A';
	else
		c = c + '0';
	uart0_put_char(c);
	
	c = (d & 0x0F);
	if(9 < c)
		c = c - 10 + 'A';
	else
		c = c + '0';
	uart0_put_char(c);
}

//-----------------------------------------------------------------------------
// timer2_isr
//-----------------------------------------------------------------------------
void timer2_isr(void) interrupt 5
{
	TF2H = 0;
	tmr2_count++;
}