?? twi.i
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/*********************************************************************************************/
/********************以下是對ATmega16的自帶I2C定義和使用**************************************/
/*********************************************************************************************/
//未使用的函數建議注釋掉,同時把頭文件里的函數定義注釋掉
/* ADC */
/* Analog Comparator */
/* USART */
/* SPI */
/* EEPROM */
/* Watchdog Timer Control Register */
/* Timer/Counter 2 */
/* Timer/Counter 1 */
/* Special Function I/O register */
/* Timer/Counter 0 */
/* MCU general */
/* SPM Conrol Register */
/* Timer/Counter Interrupts */
/* General Interrupts */
/* Port A bits */
/* Port B bits */
/* Port C bits */
/* Port D bits */
/* Lock and Fuse Bits with LPM/SPM instructions */
/* lock bits */
/* fuses low bits */
/* fuses high bits */
typedef unsigned char uchar; /* 定義可移植的無符號8位整數關鍵字 */
typedef signed char schar; /* 定義可移植的有符號8位整數關鍵字 */
typedef unsigned int uint; /* 定義可移植的無符號16位整數關鍵字 */
typedef signed int sint; /* 定義可移植的有符號16位整數關鍵字 */
typedef unsigned long ulong; /* 定義可移植的無符號32位整數關鍵字 */
typedef signed long slong; /* 定義可移植的有符號32位整數關鍵字 */
// CodeVisionAVR C Compiler
// (C) 1998-2001 Pavel Haiduc, HP InfoTech S.R.L.
// I/O registers definitions for the ATmega16
#pragma used+
sfrb TWBR=0;
sfrb TWSR=1;
sfrb TWAR=2;
sfrb TWDR=3;
sfrb ADCL=4;
sfrb ADCH=5;
sfrw ADCW=4; // 16 bit access
sfrb ADCSRA=6;
sfrb ADMUX=7;
sfrb ACSR=8;
sfrb UBRRL=9;
sfrb UCSRB=0xa;
sfrb UCSRA=0xb;
sfrb UDR=0xc;
sfrb SPCR=0xd;
sfrb SPSR=0xe;
sfrb SPDR=0xf;
sfrb PIND=0x10;
sfrb DDRD=0x11;
sfrb PORTD=0x12;
sfrb PINC=0x13;
sfrb DDRC=0x14;
sfrb PORTC=0x15;
sfrb PINB=0x16;
sfrb DDRB=0x17;
sfrb PORTB=0x18;
sfrb PINA=0x19;
sfrb DDRA=0x1a;
sfrb PORTA=0x1b;
sfrb EECR=0x1c;
sfrb EEDR=0x1d;
sfrb EEARL=0x1e;
sfrb EEARH=0x1f;
sfrw EEAR=0x1e; // 16 bit access
sfrb UBRRH=0x20;
sfrb UCSRC=0X20;
sfrb WDTCR=0x21;
sfrb ASSR=0x22;
sfrb OCR2=0x23;
sfrb TCNT2=0x24;
sfrb TCCR2=0x25;
sfrb ICR1L=0x26;
sfrb ICR1H=0x27;
sfrb OCR1BL=0x28;
sfrb OCR1BH=0x29;
sfrw OCR1B=0x28; // 16 bit access
sfrb OCR1AL=0x2a;
sfrb OCR1AH=0x2b;
sfrw OCR1A=0x2a; // 16 bit access
sfrb TCNT1L=0x2c;
sfrb TCNT1H=0x2d;
sfrw TCNT1=0x2c; // 16 bit access
sfrb TCCR1B=0x2e;
sfrb TCCR1A=0x2f;
sfrb SFIOR=0x30;
sfrb OSCCAL=0x31;
sfrb OCDR=0x31;
sfrb TCNT0=0x32;
sfrb TCCR0=0x33;
sfrb MCUCSR=0x34;
sfrb MCUCR=0x35;
sfrb TWCR=0x36;
sfrb SPMCR=0x37;
sfrb TIFR=0x38;
sfrb TIMSK=0x39;
sfrb GIFR=0x3a;
sfrb GICR=0x3b;
sfrb OCR0=0X3c;
sfrb SPL=0x3d;
sfrb SPH=0x3e;
sfrb SREG=0x3f;
#pragma used-
// Interrupt vectors definitions
// Needed by the power management functions (sleep.h)
#asm
#ifndef __SLEEP_DEFINED__
#define __SLEEP_DEFINED__
.EQU __se_bit=0x40
.EQU __sm_mask=0xB0
.EQU __sm_powerdown=0x20
.EQU __sm_powersave=0x30
.EQU __sm_standby=0xA0
.EQU __sm_ext_standby=0xB0
.EQU __sm_adc_noise_red=0x10
.SET power_ctrl_reg=mcucr
#endif
#endasm
extern unsigned char TWI_Send(uchar Slave,uchar Address,uchar Data);
//extern unsigned char TWI_SendStr(unsigned char Slave,unsigned char Address,unsigned char *Array,unsigned char CNT);
extern unsigned char TWI_Receive(unsigned char Slave,unsigned char Address);
// CodeVisionAVR C Compiler
// (C) 1998-2000 Pavel Haiduc, HP InfoTech S.R.L.
#pragma used+
void delay_us(unsigned int n);
void delay_ms(unsigned int n);
#pragma used-
extern void Init_IO ( void );
extern void Init_T1( void );
extern void Init_T0( void );
extern void Init_T2( void );
extern void Init_device( void ) ;
extern void Init_TWI(void);
//extern unsigned char Read_PCF8563T(unsigned char Address);
extern void Write_PCF8563T(unsigned char Address , char date);
extern void start_PCF( void );
extern char Read_sec( void);
extern char Read_miu( void );
void LCD_init(void);
void LCD_clear(void);
void LCD_write_str(unsigned char X,unsigned char Y,unsigned char flash *s);
void LCD_write_char(unsigned char X,unsigned char Y,unsigned char data);
void LCD_write_com(unsigned char com);
//void CursorScroll(void);
//void ScreenScroll(void);
/*
extern void Init_TWI(void) ; //TWI初始化
extern uchar TWI_Send(uchar Slave,uchar Address,uchar Data); //向IIC地址為Slave的從機的Address地址發送(寫)一字節數據Data
extern uchar TWI_SendStr(uchar Slave,uchar Address,uchar *Array,uchar CNT) ; //向IIC地址為Slave的從機的Address地址開始發送N字節數據Data
extern uchar TWI_Receive(uchar Slave,uchar Address) ; //從IIC地址為Slave的從機的Address地址讀取一字節數據Data，返回值為讀取的數據
*/
//************TWI初始化*************/
/****************************************************
*****************************************************
向IIC地址為Slave的從機的Address地址發送(寫)一字節數據Data
返回0:寫成功
返回非0:寫失敗
******************************************************
******************************************************/
uchar TWI_Send(uchar Slave,uchar Address,uchar Data)
uchar TWI_Send(uchar Slave,uchar Address,uchar Data)
{
TWCR=0x80|0x20|0x04; //或:TWCR=(1<<TWINT)|(1<<TWSTA)|(1<<TWEN);對TWINT寫1清除，使能TWI，發出Start信號
while((TWCR&0x80)!=0x80) ; //或:while (!(TWCR & (1<<TWINT)));等待TWINT置位，表明Start信號已發出
if((TWSR&0xf8)!=0x08) //或:if ((TWSR & 0xF8) != START),檢測狀態寄存器,屏蔽預分頻位,如果狀態字不是START轉出錯處理
return(1); //返回值1，表明從機沒有對Start信號作應答
//Slave即SLA+W,即是從機地址 ,可以是0x18或0x20,此處只用0x18
//所謂的應答是“從器件”在收到地址和“寫”后，將SDA電壓拉低，由“主器件”讀取
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