i2c.i

基于ZLGD7290的加热炉手动控制程序。采用K型温度传感器测温。

#line 1 "I2C.c" /0






 
 
  
#line 1 "I2C.h" /0






 
 
 
 
 
  
#line 1 "C:\KEIL\C51\INC\REG52.H" /0






 
 
 
 
 
 
 sfr P0    = 0x80;
 sfr P1    = 0x90;
 sfr P2    = 0xA0;
 sfr P3    = 0xB0;
 sfr PSW   = 0xD0;
 sfr ACC   = 0xE0;
 sfr B     = 0xF0;
 sfr SP    = 0x81;
 sfr DPL   = 0x82;
 sfr DPH   = 0x83;
 sfr PCON  = 0x87;
 sfr TCON  = 0x88;
 sfr TMOD  = 0x89;
 sfr TL0   = 0x8A;
 sfr TL1   = 0x8B;
 sfr TH0   = 0x8C;
 sfr TH1   = 0x8D;
 sfr IE    = 0xA8;
 sfr IP    = 0xB8;
 sfr SCON  = 0x98;
 sfr SBUF  = 0x99;
 
 
 sfr T2CON  = 0xC8;
 sfr RCAP2L = 0xCA;
 sfr RCAP2H = 0xCB;
 sfr TL2    = 0xCC;
 sfr TH2    = 0xCD;
 
 
 
 
 sbit CY    = PSW^7;
 sbit AC    = PSW^6;
 sbit F0    = PSW^5;
 sbit RS1   = PSW^4;
 sbit RS0   = PSW^3;
 sbit OV    = PSW^2;
 sbit P     = PSW^0;  
 
 
 sbit TF1   = TCON^7;
 sbit TR1   = TCON^6;
 sbit TF0   = TCON^5;
 sbit TR0   = TCON^4;
 sbit IE1   = TCON^3;
 sbit IT1   = TCON^2;
 sbit IE0   = TCON^1;
 sbit IT0   = TCON^0;
 
 
 sbit EA    = IE^7;
 sbit ET2   = IE^5;  
 sbit ES    = IE^4;
 sbit ET1   = IE^3;
 sbit EX1   = IE^2;
 sbit ET0   = IE^1;
 sbit EX0   = IE^0;
 
 
 sbit PT2   = IP^5;
 sbit PS    = IP^4;
 sbit PT1   = IP^3;
 sbit PX1   = IP^2;
 sbit PT0   = IP^1;
 sbit PX0   = IP^0;
 
 
 sbit RD    = P3^7;
 sbit WR    = P3^6;
 sbit T1    = P3^5;
 sbit T0    = P3^4;
 sbit INT1  = P3^3;
 sbit INT0  = P3^2;
 sbit TXD   = P3^1;
 sbit RXD   = P3^0;
 
 
 sbit SM0   = SCON^7;
 sbit SM1   = SCON^6;
 sbit SM2   = SCON^5;
 sbit REN   = SCON^4;
 sbit TB8   = SCON^3;
 sbit RB8   = SCON^2;
 sbit TI    = SCON^1;
 sbit RI    = SCON^0;
 
 
 sbit T2EX  = P1^1;  
 sbit T2    = P1^0;  
 
 
 sbit TF2    = T2CON^7;
 sbit EXF2   = T2CON^6;
 sbit RCLK   = T2CON^5;
 sbit TCLK   = T2CON^4;
 sbit EXEN2  = T2CON^3;
 sbit TR2    = T2CON^2;
 sbit C_T2   = T2CON^1;
 sbit CP_RL2 = T2CON^0;
 
 
#line 12 "I2C.h" /0
 
 
 
 sbit I2C_SCL = P3^3;	
 sbit SCL_Y= P1^6;
 sbit I2C_SDA = P3^4; 
 sbit SDA_Y=P1^7;
 
 
 
 
 
 
 
 
 
 
 
 void I2C_Init();
 
 
 bit I2C_Puts
 (
 unsigned char SlaveAddr,
 unsigned int SubAddr,
 unsigned char SubMod,
 char *dat,
 unsigned int Size
 );
 
 
 bit I2C_Gets
 (
 unsigned char SlaveAddr,
 unsigned int SubAddr,
 unsigned char SubMod,
 char *dat,
 unsigned int Size
 );
 
 
#line 9 "I2C.c" /0
 
 
 
 unsigned char data I2C_Delay_t;
 



 
 




 




 
 void I2C_Init()
 {
 I2C_SCL =SCL_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SDA =SDA_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 }
 








 
 void I2C_Start()
 {
 I2C_SDA =SDA_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SCL =SCL_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SDA =SDA_Y= 0;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SCL =SCL_Y= 0;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 }
 





 
 void I2C_Write(char dat)
 {
 unsigned char t = 8;
 do
 {
 I2C_SDA =SDA_Y= (bit)(dat & 0x80);
 dat <<= 1;
 I2C_SCL =SCL_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SCL = SCL_Y=0;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 } while ( --t != 0 );
 }
 




 
 char I2C_Read()
 {
 char dat;
 unsigned char t = 8;
 I2C_SDA =SDA_Y= 1;	 
 do
 {
 I2C_SCL =SCL_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 dat <<= 1;
 if ( I2C_SDA ) dat |= 0x01;
 I2C_SCL =SCL_Y= 0;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 } while ( --t != 0 );
 return dat;
 }
 









 
 bit I2C_GetAck()
 {
 bit ack;
 I2C_SDA =SDA_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SCL =SCL_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 ack = I2C_SDA;
 I2C_SCL =SCL_Y= 0;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 return ack;
 }
 









 
 void I2C_PutAck(bit ack)
 {
 I2C_SDA = ack;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SCL =SCL_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SCL = SCL_Y=0;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 }
 







 
 void I2C_Stop()
 {
 unsigned int t = 120;
 I2C_SDA =SDA_Y= 0;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SCL =SCL_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 I2C_SDA =SDA_Y= 1;
  {	I2C_Delay_t = (12);	while ( --I2C_Delay_t != 0 );};
 while ( --t != 0 );		 
 }
 















 
 bit I2C_Puts
 (
 unsigned char SlaveAddr,
 unsigned int SubAddr,
 unsigned char SubMod,
 char *dat,
 unsigned int Size
 )
 {
 
 unsigned char i;
 char a[3];
 
 if ( Size == 0 ) return 0;
 
 a[0] = (SlaveAddr << 1);
 
 if ( SubMod > 2 ) SubMod = 2;
 
 switch ( SubMod )
 {
 case 0:
 break;
 case 1:
 a[1] = (char)(SubAddr);
 break;
 case 2:
 a[1] = (char)(SubAddr >> 8);
 a[2] = (char)(SubAddr);
 break;
 default:
 break;
 }
 
 SubMod++;
 I2C_Start();
 for ( i=0; i<SubMod; i++ )
 {
 I2C_Write(a[i]);
 if ( I2C_GetAck() )
 {
 I2C_Stop();
 return 1;
 }
 }
 
 do
 {
 I2C_Write(*dat++);
 if ( I2C_GetAck() ) break;
 } while ( --Size != 0 );
 
 I2C_Stop();
 if ( Size == 0 )
 {
 return 0;
 }
 else
 {
 return 1;
 }
 }
 















 
 bit I2C_Gets
 (
 unsigned char SlaveAddr,
 unsigned int SubAddr,
 unsigned char SubMod,
 char *dat,
 unsigned int Size
 )
 {
 
 unsigned char i;
 char a[3];
 
 if ( Size == 0 ) return 0;
 
 a[0] = (SlaveAddr << 1);
 
 if ( SubMod > 2 ) SubMod = 2;
 
 if ( SubMod != 0 )
 {
 
 if ( SubMod == 1 )
 {
 a[1] = (char)(SubAddr);
 }
 else
 {
 a[1] = (char)(SubAddr >> 8);
 a[2] = (char)(SubAddr);
 }
 
 SubMod++;
 I2C_Start();
 for ( i=0; i<SubMod; i++ )
 {
 I2C_Write(a[i]);
 if ( I2C_GetAck() )
 {
 I2C_Stop();
 return 1;
 }
 }
 }
 
 
 I2C_Start();
 
 I2C_Write(a[0]+1);
 if ( I2C_GetAck() )
 {
 I2C_Stop();
 return 1;
 }
 
 for (;;)
 {
 *dat++ = I2C_Read();
 if ( --Size == 0 )
 {
 I2C_PutAck(1);
 break;
 }
 I2C_PutAck(0);
 }
 
 I2C_Stop();
 return 0;
 }