main.cpp

00001 #include "mbed.h"
00002 #include "OV7670.h"
00003 #include "REL225L01.h"
00004 REL225L01 tft;
00005 
00006 DigitalOut myled1(LED1);
00007 DigitalOut myled2(LED2);
00008 DigitalOut myled3(LED3);
00009 DigitalOut myled4(LED4);
00010 InterruptIn VSYNC_IN(p5);
00011 DigitalOut CMOS_CS(p20);
00012 DigitalOut EN_EXCLK(p21);
00013 DigitalOut EN_595(p23);
00014 I2C i2c(p9,p10); //sda, scl
00015 
00016 
00017 void flip1()
00018 {
00019     EN_595 = 0;
00020     tft.lcd_cw_start();
00021     EN_595 = 1;   
00022     EN_EXCLK = 1;
00023     CMOS_CS = 0;
00024 }
00025 
00026 void flip2()
00027 {
00028     EN_595 = 0;
00029     tft.lcd_cw_end();
00030     EN_595 = 1;
00031     EN_EXCLK = 0;
00032     CMOS_CS = 1;
00033 }
00034     
00035 
00036 int main() {
00037    char cmd[2];
00038    CMOS_CS = 1;   
00039    EN_EXCLK=0;
00040    EN_595=0;
00041    myled1=1;
00042    i2c.start();
00043    //
00044    //cmd[0] = REG_CLKRC; //
00045    //cmd[1] = 0x01; //Set Camera Active
00046    //i2c.write(OV7670_I2C_ADDR,cmd,2); // send string
00047    //wait(0.07); //could also pull,65ms is typical
00048    
00049    regval_list *vals=ov7670_default_regs;
00050    //while(vals->reg_num!=0xff||vals->value!=0xff)
00051    while(vals->reg_num!=0xff||vals->value!=0xff)
00052    {
00053     cmd[0] = vals->reg_num;
00054     cmd[1] = vals->value;
00055     i2c.write(OV7670_I2C_ADDR,cmd,2);
00056     wait(0.01);
00057    vals++;
00058    }
00059    
00060    vals=ov7670_fmt_rgb565;
00061    //while(vals->reg_num!=0xff||vals->value!=0xff)
00062    while(vals->reg_num!=0xff||vals->value!=0xff)
00063    {
00064     cmd[0] = vals->reg_num;
00065     cmd[1] = vals->value;
00066     i2c.write(OV7670_I2C_ADDR,cmd,2);
00067     wait(0.01);
00068    vals++;
00069    }
00070    
00071    wait(2);
00072  
00073    unsigned char v;
00074    // Horizontal setting: 11bits, top 8 live in hstart and hstop. Bottom 3 of
00075    // hstart are in href[2:0], bottom 3 of hstop in href[5:3]. There is
00076    //a mystery "edge offset" value in the top two bit fo href.
00077    
00078    cmd[0] = REG_HSTART;
00079    cmd[1] = (hstart>>3)&0xff;
00080    i2c.write(OV7670_I2C_ADDR,cmd,2);
00081    wait(0.01);
00082    cmd[0] = REG_HSTOP;
00083    cmd[1] = (hstop >> 3) & 0xff;
00084    i2c.write(OV7670_I2C_ADDR,cmd,2);
00085    //v = (0xb6 & 0xc0) | ((hstop & 0x07)<<3)| (hstart & 0x07);
00086    v = (0x80 & 0xc0) | ((hstop & 0x07)<<3)| (hstart & 0x07);
00087    wait(0.01);
00088    cmd[0] = REG_HREF;
00089    cmd[1] = v;
00090    i2c.write(OV7670_I2C_ADDR,cmd,2);
00091    
00092    /*
00093     * Vertical : simillar arrangement, but only 10 bits
00094     */
00095    cmd[0] = REG_VSTART;
00096    cmd[1] = (vstart>>2)&0xff;
00097    i2c.write(OV7670_I2C_ADDR,cmd,2);
00098    wait(0.01);
00099    cmd[0] = REG_VSTOP;
00100    cmd[1] = (vstop >>2) & 0xff;
00101    i2c.write(OV7670_I2C_ADDR,cmd,2);
00102    v = (0x0a & 0xf0) | ((vstop & 0x03) <<2) | (vstart & 0x03);
00103    cmd[0] = REG_VREF;
00104    cmd[1] = v;
00105    wait(0.01);
00106    i2c.write(OV7670_I2C_ADDR,cmd,2);
00107    cmd[0] =  REG_COM7;
00108    cmd[1] = COM7_FMT_QVGA | COM7_RGB;
00109    wait(0.01);
00110    i2c.write(OV7670_I2C_ADDR,cmd,2);
00111    
00112    i2c.stop();
00113    
00114    myled1=0;
00115    myled2=1;
00116    // TFT-LCD setting
00117    tft.lcd_init();
00118    tft.lcd_clear(BLUE);
00119    //wait(1);
00120    //tft.lcd_clear(RED);
00121    //wait(1);
00122    tft.lcd_cw_start();
00123    //Changing Internal/External WR, Data by VSYNC signal of CMOS Camera module 
00124    //LCD module write period : 2sec
00125    EN_595 = 1;
00126    
00127    VSYNC_IN.fall(&flip1); 
00128    VSYNC_IN.rise(&flip2);
00129    
00130    //wait(0.28);
00131    
00132    //Stop Re-Display 
00133    //tft.lcd_cw_end();
00134    //VSYNC_IN.fall(&flip2);
00135    
00136    myled2=0;
00137     while(1) {
00138         myled3 = 1;
00139         wait(0.2);
00140         myled3 = 0;
00141         wait(0.2);
00142     }
00143 }