mcu_reg_init_def.c

2.4G无线音箱的接收程序,采用ATMEGA8单片机和STS公司的无线模块完成

/******************************************************************************
*
* Purpose:      Microcontroller init Function
*
* Creator:      Rob Lansbergen
*
* Version:		$Revision: 12 $
*
* File Name:	$Workfile: MCU_Reg_Init_Def.c $
*
* Author:		Rob Lansbergen
*
* Check in:		$Author: Chong.cheeleong $
*
* The information is provided 揳s is?without any express or implied warranty
* of any kind, * including warranties of merchantability, noninfringement of
* intellectual property, or fitness for any particular purpose. In no event sha
* Wireless Sound Solutions and/or its affiliate companies, or its suppliers be
* liable for any damages whatsoever arising out of the use of or inability to
* use the information or the materials. Wireless Sound Solutions, its affiliate
* companies, and its suppliers further do not warrant the accuracy or
* completeness of information, text, graphics, or other items contained within
* materials. Wireless Sound Solutions, Inc., may make changes to materials, or
* the products described within, at any time, without notice.
* ?007 Wireless Sound Solutions. All rights reserved. Wireless Sound Solutions
* STS and STS-wireless are trademarks of Wireless Sound Solutions.
******************************************************************************/

/*
** Include files
** -------------
*/
#include <ina90.h>
#include "defines.h"

#ifdef MCU_ATMEGA128
	#define MHZ_8
#else
	#define MHZ_1
#endif


//#define MHZ_1
//#define MHZ_8
//#define ENABLE_TXD_DEBUG


/* Reload value for when 8 MHz or 1 MHz is used */
#define	RELOAD_OF_TCNT0  (256-(156/4)) /* CLK=4KHz divide by 39 => 100Hz=10mSec */


void Interrupt_every_10millisec(void);
void Low_Batt_Detection(void);
void MCU_Sleep_Powerdown(void);

volatile unsigned char			Wait_Timer;


/******************************************************************************
*
* Function Name :   MCU_init
*
* Purpose       :   inititalises mcu
*
* Arguments     :   none
*
* Return value  :   none
*
******************************************************************************/
/**************************************************************************************/

void MCU_init (void)
{
	char temp;

	/* IO ports     NC = Not Connected */
    /* Direction */
	
	//DDRB = 0xC0;	/* CODEC_RESET, ASIC_RESET, SCK, MISO, INT_MOSI, PREV_SW, PLAY_PAUSE_STOP_SW, NEXT_SW */
	//PORTB = 0x0F;   /* Keep CODEC_RESET low upon power up */
	DDRB = 0xC1;	/* CODEC_RESET, ASIC_RESET, SCK, MISO, INT_MOSI, PREV_SW, PLAY_PAUSE_STOP_SW, NEXT_SW */
	PORTB = 0x0E;   /* Keep CODEC_RESET low upon power up */

	#ifdef Target_CU
	//	7 6 5 4 3 2 1 0
	//	0 0 1 1 0 1 0 0 old
		DDRC=0x37;
		DDRD=0x04;
		/* Pull Up */
		PORTC=0x08;
		PORTD=0xF3;			
	#else
	DDRC = 0x37;
	DDRD = 0x20;
	//DDRD=0x20;			//Allan add PD5 for mute control: from 0x20 to 0x20//

	PORTC = 0x08;
	PORTD = 0xDF;
	//PORTD=0xC3; 		//Allan add PD5 for mute control: from 0xF3 to 0xC3//
//		DDRC = 0x34; 	/* ADC7, MCU_RESET, SCL, SDA, CONNECT_SW, SYNC_LED, NC, GPIO4 */
//	7 6 5 4 3 2 1 0
//	0 0 1 1 0 1 0 0 old
//			   1 1 MU
//	DDRC = 0x3F;
//		DDRD = 0x00;	/* VOL_UP_SW, MU_CU_SW, VOL_DOWN_SW, NC, NC, GPIO3, GPIO2, GPIO1 */
//	7 6 5 4 3 2 1 0
//	0 0 0 0 0 0 0 0 old
//	      1 0 0         MU

	    /* Pull Up */
//	    	PORTC = 0x09;
//	7 6 5 4 3 2 1 0
//	0 0 0 0 1 0 0 1 old
//		          0 0 MU
//		PORTC = 0x00;

//		PORTD = 0xE7;
//	7 6 5 4 3 2 1 0
//	1 1 1 0 0 1 1 1 old
//	      0 1 1  	 MU

	#endif

        SFIOR = 0x00;

    /* MCU control */
	MCUCR = 0x00;
	temp = MCUCSR & ~0x80;
	MCUCSR = temp;  /* JTAG disable bit must be written twice within 4 cycles */
	MCUCSR = temp;
	
    /* ADC */
    ADMUX = 0xC6; /* Internal 2.56V VRef with ext. cap. at AREF pin; default ADC result is right-adjusted; X; Selected analog input ADC6 */
    ADCSR = 0x9F; /* ADC enabled; Do not start ADC conversion; Single conversion (no free running) ; Clear ADC interrupt flag; */
                  /* ADC Conversion Complete Interrupt enabled; */
                  /* ADC prescaled to divide XTAL freq of 1MHz by a factor of 8 = 125kHz */

    /* timer interrupts */
	TIMSK = 0x00; /* Clear all timer interrupts */
	TIFR  = 0xFF; /* Clear all flags by reading them */

    /* timers and counters */
	ASSR  = 0x00; /* Timers clocked from IO-CLK not from XTAL */
	TCCR0 = 0x00; /* Normal operation, clock stopped */
	TCNT0 = 0x00; /* Counter value = 0 */

	TCCR1A = 0x00; /* All pins with output compare, function as IO pins */
	TCCR1B = 0x00;
	TCNT1H = 0x00;
	TCNT1L = 0x00;

	ICR1H = 0x00;
	ICR1L = 0x00;
	TCCR2 = 0x00; /* No clk source, OC2 disconnected */
	TCNT2 = 0x00;
	OCR2  = 0xFF;
	TIMSK = TIMSK | 0x01; /* Interrupt on Overflow */
	TIFR  = TIFR  | 0x01;
	TCCR0 = 0x04;

	TCNT1 = 2; /* Value = 72 == 5 msec */
	/* countval0 = (duration/50); */  /* input in msec, 72 counts == 5 msec, countval counts 5msec steps */

	/* Enable interrupts */
	SREG = SREG | 0x80;

	_SEI();
	i2c_init();
	
	/* UART communicates to PC */
	UCSRC = 0x06;
	/* RX enable, TX enable */
	/* UCSRB = 0x08; */
	UCSRB = 0x00;
	UCSRA = 0x00;
	UBRRH = 0x00;

	UBRRL = 49; /* 00000001 Baud rate = 38,4k at 8Mhz */

}


/**************************************************************************************/

#pragma vector = ADC_vect
__interrupt void ADCVInterrupt(void)
{
    Low_Batt_Detection();
}

#pragma vector = TIMER0_OVF_vect
__interrupt void Timer0OVInterupt(void)
{
	TCNT0 = RELOAD_OF_TCNT0;		/* 10 millisecond on 1 Mhz */

	Wait_Timer++;
	Interrupt_every_10millisec();

}

void Wait_For_mSec(int Milisec)
{
	if (Milisec > 2550) Milisec = 2550;
	if (Milisec < 10)   Milisec = 10;

	_CLI();
	Wait_Timer = 0;
	_SEI();
	
	while (Wait_Timer < (Milisec/10))
	{
		/* wait for X times 10 mSec */
	}
}
void Low_Batt_Detection(void)
{
    unsigned char  hi_byte, lo_byte;
    lo_byte = ADCL;        /* Read ADC low byte */
    hi_byte = ADCH;        /* Read ADC high byte. This will allow ADC to update ADCH and ADCL */

    /* Codec shuts down and LED blinks when battery level falls below 2.8V (0.675V at ADC6 analog input) */
    if ( (lo_byte < 0x0E) && (hi_byte < 0x02) )
    {
//        Powerdown_Codec();

        Sync_Led_Status = LED_LOW_BATT; /* Use blinking LED to inform user of low battery level */

//        MCU_Sleep_Powerdown();

    }

    ADCSR = ADCSR | 0x40; /* Start next conversion */

}

void MCU_Sleep_Powerdown(void)
{
    MCUCR = MCUCR | 0xC0; /* Set Sleep to Power-down Mode */
    _SLEEP();             /* Enter Sleep */

}














//TX Board                  		ATmega8			DDR  PORT	ATmeag88		DDR  PORT
//															PD7		0		1
//															PD6		0		1
//															PD5		0		1
//1. CONNECT BUTTON 	Pin26	PC3		0     		1	Pin2		PD4		0    		1(0)		
//															PD3		0		0
//4. change LINK_LED 		Pin25	PC2		1      	0	Pin32	PD2		1      	0(1)
//5. ASIC_INT			Pin15	PB3		0		1	Pin31	PD1		0		1
//															PD0		0		1
//																	0x04	0xF3

//															PC7		0		0
//															PC6		0		0
//															PC5		1		0
//															PC4		1		0
//															PC3		0		1
//															PC2		1		0
//2. CODEC_\RESET 		Pin8		PB7		1      	0	Pin24	PC1		1      	0
//3. ASIC_\RESET 		Pin7		PB6		1     		0	Pin23	PC0		1      	0(1)
//																	0x37	0x08

/**************************************************************************************/
//RX Board                   	ATmega8			DDR  PORT	ATmeag88		DDR  PORT
//															PD7		0		1
//															PD6		0		1
//3. LINK_LED 			Pin25	PC2		1      	0	Pin9		PD5		1(0)      	0(1)
//2. CONNECT BUTTON		Pin26	PC3		0     		1	Pin2		PD4		0     		1(0)
//1. SWAP_KEY		   	Pin10	PD6		0    		1	Pin1		PD3		0    		1(0)
//															PD2		0		1
//5. ASIC_INT			Pin15	PB3		0		1	Pin31	PD1		0		1
//															PD0		0		1
//																	0x20	0xDF

//															PC7		0		0
//															PC6		0		0
//															PC5		1		0
//															PC4		1		0
//															//PC3		0		1
//															PC3		1		0
//															PC2		1		0
//6. CODEC_\RESET		Pin8		PB7		1      	0	Pin24	PC1		1(0)     	0(1)
//4. ASIC_\RESET 		Pin7		PB6		1     		0	Pin23	PC0		1(0)      	0
//																	 0x37	0x08
//																	 0x3F	0x00

/*Original IO ports 	NC = Not Connected */
/* Direction */
//DDRB = 0xC0;	/* CODEC_RESET, ASIC_RESET, SCK, MISO, INT_MOSI, PREV_SW, PLAY_PAUSE_STOP_SW, NEXT_SW */
//DDRC = 0x34;	/* ADC7, MCU_RESET, SCL, SDA, CONNECT_SW, SYNC_LED, NC, GPIO4 */
//DDRD = 0x00;	/* VOL_UP_SW, MU_CU_SW, VOL_DOWN_SW, NC, NC, GPIO3, GPIO2, GPIO1 */
/* Pull Up */
//PORTB = 0x0F;	/* Keep CODEC_RESET low upon power up */
//PORTC = 0x09;	
//PORTD = 0xE7;