lcd_drv.c

阳初ucosII ADS1.2程序带VGA显示

#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>

//=======================
#include    "../UCOS-II/includes.h"               /* uC/OS interface */
//=======================

#include "2440addr.h"
#include "lcd_drv.h"


//TFT 640480
//unsigned int __LCDFrameBuffer[VIDEO_VISIBLE_ROWS][LCD_XSIZE_TFT_640480];
volatile unsigned char *__LCDFrameBuffer;
static OS_EVENT   *Sem_LcdDraw;


#define WRDATA      (1)
#define POLLACK     (2)
#define RDDATA      (3)
#define SETRDADDR   (4)

typedef unsigned char U8;
typedef unsigned int  U32;

/*#define IIC_INTPEND 0x10*/

#define IICBUFSIZE 0x20
static U8 _iicData[IICBUFSIZE];
static int _iicDataCount;
static int _iicStatus;
static int _iicMode;
static int _iicPt;

static void IicPoll(void);
static void Run_IicPoll(void);
void Uart0_Printf(char *fmt,...);

static void Delay(int sec)
{
    int dl;
    
    while(sec != -1){
        sec--;
        for (dl=4900;dl>0;dl--);
    }
    
    return;
}

//**************[ iic_wr ]*****************************************
static void iic_wr(U32 slvAddr,U32 addr,U8 data)
{
        _iicMode      = WRDATA;
    _iicPt        = 0;
    _iicData[0]   = (U8)addr;
    _iicData[1]   = data;
    _iicDataCount = 2;
    
    rIICDS        = slvAddr;            //0xa0
      //Master Tx mode, Start(Write), IIC-bus data output enable
      //Bus arbitration sucessful, Address as slave status flag Cleared,
      //Address zero status flag cleared, Last received bit is 0
    rIICSTAT      = 0xf0;      
      //Clearing the pending bit isn't needed because the pending bit has been cleared.
    while(_iicDataCount!=-1)
       Run_IicPoll();

    _iicMode = POLLACK;

    while(1)
    {
        rIICDS     = slvAddr;
        _iicStatus = 0x100;             //To check if _iicStatus is changed 
        rIICSTAT   = 0xf0;              //Master Tx, Start, Output Enable, Sucessful, Cleared, Cleared, 0
        rIICCON    = 0xaf;              //Resumes IIC operation. 
        while(_iicStatus==0x100)  
            Run_IicPoll();
              
        if(!(_iicStatus & 0x1))
            break;                      //When ACK is received
    }
    rIICSTAT = 0xd0;                    //Master Tx condition, Stop(Write), Output Enable
    rIICCON  = 0xaf;                    //Resumes IIC operation. 
    Delay(1);                           //Wait until stop condtion is in effect.
      //Write is completed.
}
        
//************************[ iic_rd ]********************************
static U8 iic_rd(U32 slvAddr,U32 addr)
{
    _iicMode      = SETRDADDR;
    _iicPt        = 0;
    _iicData[0]   = (U8)addr;
    _iicDataCount = 1;

    rIICDS   = slvAddr;
    rIICSTAT = 0xf0;                    //MasTx,Start  
      //Clearing the pending bit isn't needed because the pending bit has been cleared.
    while(_iicDataCount!=-1)
        Run_IicPoll();

    _iicMode      = RDDATA;
    _iicPt        = 0;
    _iicDataCount = 1;
    
    rIICDS   = slvAddr;
    rIICSTAT = 0xb0;                    //Master Rx,Start
    rIICCON  = 0xaf;                    //Resumes IIC operation.   
    while(_iicDataCount!=-1)
        Run_IicPoll();

    return _iicData[1];
}

//**********************[ Run_IicPoll ]*********************************
static void Run_IicPoll(void)
{
    if(rIICCON & 0x10)                  //Tx/Rx Interrupt Enable
       IicPoll();
}       
    
//**********************[IicPoll ]**************************************
static void IicPoll(void)
{
    U32 iicSt,i;
    
    iicSt = rIICSTAT; 
    if(iicSt & 0x8){}                   //When bus arbitration is failed.
    if(iicSt & 0x4){}                   //When a slave address is matched with IICADD
    if(iicSt & 0x2){}                   //When a slave address is 0000000b
    if(iicSt & 0x1){}                   //When ACK isn't received

    switch(_iicMode)
    {
        case POLLACK:
            _iicStatus = iicSt;
            break;

        case RDDATA:
            if((_iicDataCount--)==0)
            {
                _iicData[_iicPt++] = rIICDS;
            
                rIICSTAT = 0x90;                //Stop MasRx condition 
                rIICCON  = 0xaf;                //Resumes IIC operation.
                Delay(1);                       //Wait until stop condtion is in effect.
                                                //Too long time... 
                                                //The pending bit will not be set after issuing stop condition.
                break;    
            }      
            _iicData[_iicPt++] = rIICDS;
                        //The last data has to be read with no ack.
            if((_iicDataCount)==0)
                rIICCON = 0x2f;                 //Resumes IIC operation with NOACK.  
            else 
                rIICCON = 0xaf;                 //Resumes IIC operation with ACK
            break;

        case WRDATA:
            if((_iicDataCount--)==0)
            {
                rIICSTAT = 0xd0;                //stop MasTx condition 
                rIICCON  = 0xaf;                //resumes IIC operation.
                Delay(1);                       //wait until stop condtion is in effect.
                       //The pending bit will not be set after issuing stop condition.
                break;    
            }
            rIICDS = _iicData[_iicPt++];        //_iicData[0] has dummy.
            for(i=0;i<10;i++);                  //for setup time until rising edge of IICSCL
            rIICCON = 0xaf;                     //resumes IIC operation.
            break;

        case SETRDADDR:
//          Uart_Printf("[S%d]",_iicDataCount);
            if((_iicDataCount--)==0)
            {
                break;                  //IIC operation is stopped because of IICCON[4]    
            }
            rIICDS = _iicData[_iicPt++];
            for(i=0;i<10;i++);          //for setup time until rising edge of IICSCL
            rIICCON = 0xaf;             //resumes IIC operation.
            break;

        default:
            break;      
    }
}

static int VGADAC_init(void)
{
    //int var0,var1;
    unsigned int lcdcon;
    
    lcdcon = rLCDCON1;
    rLCDCON1 = lcdcon & ~1;
    
    rGPEUP  |= 0xc000;                  //Pull-up disable
    rGPECON = (rGPECON&~0xf0000000)|0xa0000000;                //GPE15:IICSDA , GPE14:IICSCL    
    
    //Enable ACK, Prescaler IICCLK=PCLK/16, Enable interrupt, Transmit clock value Tx clock=IICCLK/16
    //IICCON = 0xaf;
    rIICCON  = (1<<7) | (0<<6) | (1<<5) | (0xf);
    
    rIICADD  = 0x10;                    //2410 slave address = [7:1]
    rIICSTAT = 0x10;                    //IIC bus data output enable(Rx/Tx)
    
    //Uart0_Printf("VGA set1!\n");
    iic_wr(0xec,4,0x20);
    //Uart0_Printf("VGA set2!\n");
    iic_wr(0xec,7,0x8c);
    //Uart0_Printf("VGA set3!\n");
    iic_wr(0xec,14,0x1b);
    //Uart0_Printf("VGA set4!\n");
    iic_wr(0xec,13,0x03);
    
    //Uart0_Printf("VGA ve!\n");
    if (iic_rd(0xec,4) != 0x20) return -1;
    
    if (iic_rd(0xec,7) != 0x8c) return -1;
    
    if (iic_rd(0xec,14) != 0x1b) return -1;
    
    rLCDCON1 = lcdcon;
    return 0;
}

void Lcd_Init()
{
    //int ClkVal;
    
    __LCDFrameBuffer = (unsigned char*)_LCD_FBADDRESS;//+0x800000;

    if (VGADAC_init()!=0)
    {
        Uart0_Printf("VGA Initial error!\n");
        while(1);
        //return;
    }
    //Uart0_Printf("VGA Initial ok!\n");
    
    rGPCUP=0xffffffff; // Disable Pull-up register
    rGPCCON=0xaaaaaaaa; //Initialize VD[7:0],LCDVF[2:0],VM,VFRAME,VLINE,VCLK,LEND 
    rGPDUP=0xffffffff; // Disable Pull-up register
    rGPDCON=0xaaaaaaaa; //Initialize VD[23:8]   
    
    //         时钟25MHz               MVAL值       TFT    24BPP
    //rLCDCON1=(CLKVAL_TFT_640480<<8)|(MVAL_USED<<7)|(3<<5)|(13<<1)|0;
    //         时钟25MHz               MVAL值       TFT    16BPP
    rLCDCON1=(CLKVAL_TFT_640480<<8)|(MVAL_USED<<7)|(3<<5)|(12<<1)|0;
    rLCDCON2=(VBPD_640480<<24)|(LINEVAL_TFT_640480<<14)|(VFPD_640480<<6)|(VSPW_640480);
    rLCDCON3=(HBPD_640480<<19)|(HOZVAL_TFT_640480<<8)|(HFPD_640480);
    rLCDCON4=(MVAL<<8)|(HSPW_640480);

    //0x00 XX XX XX   5:5:5:I
    // ---  R  G  B
    //rLCDCON5=(0<<12)|(0<<11)|(1<<9)|(1<<8)|1; // BPP24:MSB,HSYNC and VSYNC are inverted
    //0x00 XX XX XX   5:6:5
    // ---  R  G  B
    rLCDCON5=(0<<12)|(1<<11)|(1<<9)|(1<<8)|1; // BPP24:MSB,HSYNC and VSYNC are inverted

    
    rLCDSADDR1=( ( (unsigned int)_LCD_FBADDRESS >> 22) << 21 ) | M5D ( (unsigned int)_LCD_FBADDRESS >> 1 );
    rLCDSADDR2=M5D( ( (unsigned int)_LCD_FBADDRESS + (VIDEO_VISIBLE_COLS*VIDEO_VISIBLE_ROWS*VIDEO_PIXEL_SIZE ) ) >> 1 );

    rLCDSADDR3=(0<<11)|(VIDEO_VISIBLE_COLS*2);

    //rLPCSEL&=(~7); // Disable LPC3600
    rTCONSEL&=(~0x07); // Disable LPC3600
    rTPAL=0; // Disable Temp Palette
    
    //
    // 为了避免屏幕抖动,先不打开液晶控制器