lptport1.h File Reference

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Data Structures

struct  LPT1_CONTROL

Defines

#define LPT1_BASE   0x378
#define LPT3_BASE   0x3bc
#define LPT1_DATA_PORT   LPT1_BASE
#define LPT1_STATUS_PORT   (LPT1_BASE+1)
#define LPT1_CONTROL_PORT   (LPT1_BASE+2)
#define LPT_CONTORL_STROBE   0x01
#define LPT_CONTORL_AUTOFDXT   0x02
#define LPT_CONTORL_INITB   0x04
#define LPT_CONTORL_SLCTIN   0x08
#define LPT_CONTORL_INTEN   0x10
#define LPT_CONTORL_DIR_READ   0x20
#define LPT_CONTORL_BIT6   0x40
#define LPT_CONTORL_BIT7   0x80
#define LPT_STATUS_ERRORB   0x08
#define LPT_STATUS_SLCT   0x10
#define LPT_STATUS_PE   0x20
#define LPT_STATUS_ACKNLGB   0x40
#define LPT_STATUS_BUSYB   0x80

Functions

void Lpt1Init (void)
void Lpt1Handler (void)
void Lpt1Svc (void)
U8 Lpt1DataPortRead (void)
void Lpt1DataPortWrite (U8 Data)
U8 Lpt1StatusPortRead (void)
void Lpt1ControlPortWrite (U8 Data)
void Lpt1DataPortSetOutput (void)
void Lpt1DataPortSetInput (void)
void Lpt1InterruptEnable (void)
void Lpt1InterruptDisable (void)

Variables

LPT1_CONTROL Lpt1Ctrl

Define Documentation

#define LPT1_BASE   0x378

Definition at line 4 of file lptport1.h.

#define LPT1_CONTROL_PORT   (LPT1_BASE+2)

Definition at line 12 of file lptport1.h.

#define LPT1_DATA_PORT   LPT1_BASE

Definition at line 10 of file lptport1.h.

#define LPT1_STATUS_PORT   (LPT1_BASE+1)

Definition at line 11 of file lptport1.h.

#define LPT3_BASE   0x3bc

Definition at line 6 of file lptport1.h.

#define LPT_CONTORL_AUTOFDXT   0x02

Definition at line 15 of file lptport1.h.

#define LPT_CONTORL_BIT6   0x40

Definition at line 20 of file lptport1.h.

#define LPT_CONTORL_BIT7   0x80

Definition at line 21 of file lptport1.h.

#define LPT_CONTORL_DIR_READ   0x20

Definition at line 19 of file lptport1.h.

#define LPT_CONTORL_INITB   0x04

Definition at line 16 of file lptport1.h.

#define LPT_CONTORL_INTEN   0x10

Definition at line 18 of file lptport1.h.

#define LPT_CONTORL_SLCTIN   0x08

Definition at line 17 of file lptport1.h.

#define LPT_CONTORL_STROBE   0x01

Definition at line 14 of file lptport1.h.

#define LPT_STATUS_ACKNLGB   0x40

Definition at line 26 of file lptport1.h.

#define LPT_STATUS_BUSYB   0x80

Definition at line 27 of file lptport1.h.

#define LPT_STATUS_ERRORB   0x08

Definition at line 23 of file lptport1.h.

#define LPT_STATUS_PE   0x20

Definition at line 25 of file lptport1.h.

#define LPT_STATUS_SLCT   0x10

Definition at line 24 of file lptport1.h.

Function Documentation

void Lpt1ControlPortWrite ( U8  Data  ) 

Definition at line 85 of file lptport1.c.

00085                                   {
00086     Lpt1Ctrl.Control=Data;
00087     OutByte(LPT1_CONTROL_PORT,Lpt1Ctrl.Control);
00088 }

U8 Lpt1DataPortRead ( void   ) 

Definition at line 55 of file lptport1.c.

00055                          {
00056     if((Lpt1Ctrl.Control&LPT_CONTORL_DIR_READ)==0){
00057         Lpt1DataPortSetInput();
00058     }
00059     Lpt1Ctrl.Data=InByte(LPT1_DATA_PORT);
00060     return Lpt1Ctrl.Data;
00061 }

void Lpt1DataPortSetInput ( void   ) 

Definition at line 76 of file lptport1.c.

00076                                {
00077     Lpt1Ctrl.Control=Lpt1Ctrl.Control|LPT_CONTORL_DIR_READ; //dir bit=0 for output
00078     OutByte(LPT1_CONTROL_PORT,Lpt1Ctrl.Control);
00079 }

void Lpt1DataPortSetOutput ( void   ) 

Definition at line 71 of file lptport1.c.

00071                                 {
00072     Lpt1Ctrl.Control=Lpt1Ctrl.Control&(~LPT_CONTORL_DIR_READ); //dir bit=0 for output
00073     OutByte(LPT1_CONTROL_PORT,Lpt1Ctrl.Control);
00074 }

void Lpt1DataPortWrite ( U8  Data  ) 

Definition at line 63 of file lptport1.c.

00063                                {
00064     if((Lpt1Ctrl.Control&LPT_CONTORL_DIR_READ)==LPT_CONTORL_DIR_READ){
00065         Lpt1DataPortSetOutput();
00066     }
00067     Lpt1Ctrl.Data=Data;
00068     return OutByte(LPT1_DATA_PORT,Data);
00069 }

void Lpt1Handler ( void   ) 

Definition at line 33 of file lptport1.c.

00033                       {
00034     // no operation function
00035 }

void Lpt1Init ( void   ) 

Definition at line 19 of file lptport1.c.

00019                    {
00020     PicIrqDisable(IRQ7_LPT1);                   //no use interrupt at begining 
00021     Lpt1Ctrl.State=Lpt1LedOnState;
00022     Lpt1Ctrl.Data=0;
00023     Lpt1Ctrl.Status=0;
00024     Lpt1Ctrl.Control=LPT_CONTORL_DIR_READ|0xc0; //set data port read,
00025                                                 //disable interrupt,
00026                                                 //nSelectIn=1,nInit=1,nStrob=0,nAutoLF=0, 
00027     Lpt1Ctrl.Timer=0;
00028     Lpt1ControlPortWrite(Lpt1Ctrl.Control); //set data port read,disable interrupt,nStrob=0,nAutoLF=0 
00029     //InterruptIrqHandlerSet(IRQ7_LPT1,Lpt1Handler); //no use interrupt at begining 
00030     //PicIrqEnable(IRQ7_LPT1);                           //no use interrupt at begining 
00031 }

void Lpt1InterruptDisable ( void   ) 

void Lpt1InterruptEnable ( void   ) 

U8 Lpt1StatusPortRead ( void   ) 

Definition at line 81 of file lptport1.c.

00081                            {
00082     Lpt1Ctrl.Status=InByte(LPT1_STATUS_PORT);
00083 }

void Lpt1Svc ( void   ) 

Definition at line 37 of file lptport1.c.

00037                   {
00038     switch(Lpt1Ctrl.State){
00039         case Lpt1IdleState: 
00040             break;
00041         case Lpt1LedOnState: 
00042             Lpt1DataPortWrite(0x00);
00043             Lpt1Ctrl.State=Lpt1LedOffState;
00044             break;
00045         case Lpt1LedOffState: 
00046             Lpt1DataPortWrite(0xff);
00047             Lpt1Ctrl.State=Lpt1LedOnState;
00048             break;
00049         default:
00050             break;
00051     }
00052 }

Variable Documentation

LPT1_CONTROL Lpt1Ctrl

Definition at line 17 of file lptport1.c.

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