Igor Levkov
/
levkov_ov7670
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Fork of
ov7670
by 
Edoardo De Marchi
Revision 1:d82dbad9c06b, committed 2013-03-16
- Comitter:
- edodm85
- Date:
- Sat Mar 16 13:40:36 2013 +0000
- Parent:
- 0:810d59d0b843
- Child:
- 2:354a00023f79
- Commit message:
- Add QVGA and VGA reg
Changed in this revision
--- a/ov7670.cpp Sun Mar 10 13:01:45 2013 +0000
+++ b/ov7670.cpp Sat Mar 16 13:40:36 2013 +0000
@@ -80,7 +80,7 @@
wait_ms(200) ;
}
-int OV7670::Init(char c)
+int OV7670::Init(char c, int n)
{
if (ReadReg(REG_PID) != 0x76) // check id camera
@@ -88,62 +88,102 @@
return 0;
}
- Reset(); // Resets all registers to default values
-
- WriteReg(REG_CLKRC,0x80);
+ Reset(); // Resets all registers to default values
+ Reset(); // Resets all registers to default values
+
+ WriteReg(REG_RGB444, 0x00); // Disable RGB444
+ WriteReg(REG_COM10,0x02); // 0x02 VSYNC negative (http://nasulica.homelinux.org/?p=959)
+ WriteReg(REG_MVFP,0x27); // mirror image
+
+ WriteReg(REG_CLKRC,0x80); // prescaler x1
+ WriteReg(DBLV,0x0a); // bypass PLL
+
WriteReg(REG_COM11,0x0A) ;
- WriteReg(REG_TSLB,0x04); // 0D = UYVY 04 = YUYV
- WriteReg(REG_COM13,0x88); // connect to REG_TSLB
+ WriteReg(REG_TSLB,0x04); // 0D = UYVY 04 = YUYV
+ WriteReg(REG_COM13,0x88); // connect to REG_TSLB
- //WriteReg(REG_COM7,0x01) ; // output format: raw
- WriteReg(REG_RGB444, 0x00); // Disable RGB444
- WriteReg(REG_HSTART,0x16) ;
- WriteReg(REG_HSTOP,0x04) ;
- WriteReg(REG_HREF,0x24) ;
- WriteReg(REG_VSTART,0x02) ;
- WriteReg(REG_VSTOP,0x7a) ;
- WriteReg(REG_VREF,0x0a) ;
- WriteReg(REG_COM10,0x02) ; // 0x02 VSYNC negative (http://nasulica.homelinux.org/?p=959)
- WriteReg(REG_MVFP,0x27) ;
-
- if(c == 'y')
- {
- WriteReg(REG_COM7,0x00); // YUV
- WriteReg(REG_COM17,0x00); // color bar disable
- WriteReg(REG_COM3, 0x04);
- WriteReg(REG_COM14, 0x1a); // by 4
- WriteReg(REG_COM15, 0xC0); // Set normal rgb
- WriteReg(0x70, 0x3A);
- WriteReg(0x71, 0x35);
- WriteReg(0x72, 0x22);
- WriteReg(0x73, 0xf2);
- WriteReg(0xA2, 0x02);
- }else{ // RGB565
- WriteReg(REG_COM7,0x04); // RGB + color bar disable
- WriteReg(REG_RGB444, 0x00); // Disable RGB444
- WriteReg(REG_COM15, 0xD0); // Set rgb565 0xD0 or rgb555 0xD8
- WriteReg(REG_COM3, 0x04);
- WriteReg(REG_COM14, 0x1a); // by 4
- WriteReg(0x70, 0x3A);
- WriteReg(0x71, 0x35);
- WriteReg(0x72, 0x22);
- WriteReg(0x73, 0xf2);
- WriteReg(0xA2, 0x02);
- }
-
+
+ if(c == 'b' || c == 'y') // YUV
+ {
+ WriteReg(REG_COM7, 0x00); // YUV
+ WriteReg(REG_COM17, 0x00); // color bar disable
+ WriteReg(REG_COM3, 0x04);
+ WriteReg(REG_COM15, 0xC0); // Set normal rgb with Full range
+
+ }else
+ if(c == 'r') // RGB565
+ {
+ WriteReg(REG_COM7, 0x04); // RGB + color bar disable
+ WriteReg(REG_RGB444, 0x00); // Disable RGB444
+ WriteReg(REG_COM15, 0x10); // Set rgb565 with Full range 0xD0
+ WriteReg(REG_COM3, 0x04);
+ WriteReg(REG_CLKRC,0x80); // prescaler x1
+ }
+
+ WriteReg(0x70, 0x3A); // Scaling Xsc
+ WriteReg(0x71, 0x35); // Scaling Ysc
+ WriteReg(0xA2, 0x02); // pixel clock delay
+
+ if(n == 19200) // 160*120
+ {
+ WriteReg(REG_COM14, 0x1a); // divide by 4
+ WriteReg(0x72, 0x22); // downsample by 4
+ WriteReg(0x73, 0xf2); // divide by 4
+ WriteReg(REG_HSTART,0x16);
+ WriteReg(REG_HSTOP,0x04);
+ WriteReg(REG_HREF,0xa4);
+ WriteReg(REG_VSTART,0x02);
+ WriteReg(REG_VSTOP,0x7a);
+ WriteReg(REG_VREF,0x0a);
+ }
+ if(n == 76800) // 320*240
+ {
+ WriteReg(REG_COM14, 0x19);
+ WriteReg(0x72, 0x11);
+ WriteReg(0x73, 0xf1);
+ WriteReg(REG_HSTART,0x16);
+ WriteReg(REG_HSTOP,0x04);
+ WriteReg(REG_HREF,0x24);
+ WriteReg(REG_VSTART,0x02);
+ WriteReg(REG_VSTOP,0x7a);
+ WriteReg(REG_VREF,0x0a);
+ }
+ if(n == 307200) // 640*480
+ {
+ WriteReg(REG_COM3,0x00); // REG_COM3
+ WriteReg(0x3e,0x00); // REG_COM14
+ WriteReg(0x72,0x11); //
+ WriteReg(0x73,0xf0); //
+
+ WriteReg(0x32,0xb6); // HREF
+ WriteReg(0x17,0x13); // HSTART
+ WriteReg(0x18,0x01); // HSTOP
+ WriteReg(0x19,0x02); // VSTART
+ WriteReg(0x1a,0x7a); // VSTOP
+ WriteReg(0x03,0x0a); // VREF
+ WriteReg(0x70, 0x3a); // Scaling Xsc
+ WriteReg(0x71, 0x35); // Scaling Ysc
+ WriteReg(0xA2, 0x02); // pixel clock delay
+
+ WriteReg(REG_COM1, 0x00);
+ }
+
+
// COLOR SETTING
-
+
WriteReg(REG_COM8,0x8F); // AGC AWB AEC Enab
+ WriteReg(0xAA,0x14); // Average-based AEC algorithm
WriteReg(REG_BRIGHT,0x00); // 0x00(Brightness 0) - 0x18(Brightness +1) - 0x98(Brightness -1)
-
- WriteReg(MTX1,0x80);
- WriteReg(MTX2,0x80);
- WriteReg(MTX3,0x00);
- WriteReg(MTX4,0x22);
- WriteReg(MTX5,0x5e);
- WriteReg(MTX6,0x80);
WriteReg(REG_CONTRAS,0x40); // 0x40(Contrast 0) - 0x50(Contrast +1) - 0x38(Contrast -1)
- WriteReg(MTXS,0x9e);
+ WriteReg(0xB1,0xB1); // Automatic Black level Calibration
+
+ WriteReg(MTX1,0x80);
+ WriteReg(MTX2,0x80);
+ WriteReg(MTX3,0x00);
+ WriteReg(MTX4,0x22);
+ WriteReg(MTX5,0x5e);
+ WriteReg(MTX6,0x80);
+ WriteReg(MTXS,0x9e);
WriteReg(AWBC7,0x88);
WriteReg(AWBC8,0x88);
WriteReg(AWBC9,0x44);
@@ -152,14 +192,13 @@
WriteReg(AWBC12,0x0e);
WriteReg(REG_GFIX,0x00);
WriteReg(GGAIN,0x40);
- WriteReg(DBLV,0x0a);
WriteReg(AWBCTR3,0x0a);
WriteReg(AWBCTR2,0x55);
WriteReg(AWBCTR1,0x11);
WriteReg(AWBCTR0,0x9f);
WriteReg(0xb0,0x84);
-
+
return 1;
}
@@ -197,7 +236,6 @@
int B1;
rclk = 1;
B1 = (((data&0x07800000)>>19)|((data&0x078000)>>15));
- //B1 = data; // BusIn data(d0,d1,d2,d3,d4,d5,d6,d7)
rclk = 0;
return B1;
}
--- a/ov7670.h Sun Mar 10 13:01:45 2013 +0000
+++ b/ov7670.h Sat Mar 16 13:40:36 2013 +0000
@@ -40,7 +40,7 @@
void WriteReg(int addr,int data); // write to camera
int ReadReg(int addr); // read from camera
void Reset(void); // reset reg camera
- int Init(char c); // init reg
+ int Init(char c, int n); // init reg
void VsyncHandler(void); // vsync handler
void HrefHandler(void); // href handler
int ReadOnebyte(void); // Data Read
--- a/ov7670reg.h Sun Mar 10 13:01:45 2013 +0000 +++ b/ov7670reg.h Sat Mar 16 13:40:36 2013 +0000 @@ -94,7 +94,6 @@ #define COM17_AECWIN 0xc0 /* AEC window - must match COM4 */ #define COM17_CBAR 0x08 /* DSP Color bar */ -#define CMATRIX_LEN 6 #define REG_BRIGHT 0x55 /* Brightness */ #define REG_REG76 0x76 /* OV's name */ #define R76_BLKPCOR 0x80 /* Black pixel correction enable */