OV7670 Library_2
Fork of ov7670 by
ov7670.cpp
- Committer:
- singularity
- Date:
- 2015-02-07
- Revision:
- 5:599fcf817d98
- Parent:
- 4:119b4c04a4ed
File content as of revision 5:599fcf817d98:
#include "ov7670.h" OV7670::OV7670(PinName sda, PinName scl, PinName vs, PinName hr, PinName we, Name port, int mask, PinName rt, PinName o, PinName rc) : _i2c(sda,scl),vsync(vs),href(hr),wen(we),data(port,mask),rrst(rt),oe(o),rclk(rc) { _i2c.stop(); _i2c.frequency(OV7670_I2CFREQ); vsync.fall(this,&OV7670::VsyncHandler); // interrupt fall edge CaptureReq = false; Busy = false; Done = false; LineCounter = 0; rrst = 1; oe = 1; rclk = 1; wen = 0; } OV7670::~OV7670() { } // capture request void OV7670::CaptureNext(void) { CaptureReq = true; Busy = true; } // capture done? (with clear) bool OV7670::CaptureDone(void) { bool result; if (Busy) { result = false; }else { result = Done; Done = false; } return result; } // vsync handler void OV7670::VsyncHandler(void) { // Capture Enable if (CaptureReq) { wen = 1; Done = false; CaptureReq = false; }else { wen = 0; if (Busy) { Busy = false; Done = true; } } } // Data Read int OV7670::ReadOnebyte(void) { int B1; rclk = 1; B1 = (((data&0x07800000)>>19)|((data&0x078000)>>15)); rclk = 0; return B1; } // Data Start read from FIFO void OV7670::ReadStart(void) { rrst = 0; oe = 0; wait_us(1); rclk = 0; wait_us(1); rclk = 1; wait_us(1); rrst = 1; } // Data Stop read from FIFO void OV7670::ReadStop(void) { oe = 1; ReadOnebyte(); rclk = 1; } void OV7670::Reset(void) { WriteReg(0x12, 0x80); // RESET CAMERA wait_ms(200); } int OV7670::Init(char c, int n) { if(c == 'b' || c == 'y') // YUV { format_temp = "BAW"; } else if(c == 'r') // RGB565 { format_temp = "RGB"; } return Init(format_temp, n); } int OV7670::Init(char *format, int n) { if (ReadReg(REG_PID) != 0x76) // check id camera { return 0; } 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 if((strcmp("BAW", format) == 0) || (strcmp("YUV", format) == 0)|| (strcmp("RAW", format) == 0)) // 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((strcmp("RGB", format) == 0)) // 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_HREF, 0xa4); WriteReg(REG_HSTART, 0x16); WriteReg(REG_HSTOP, 0x04); WriteReg(REG_VREF, 0x0a); WriteReg(REG_VSTART, 0x02); WriteReg(REG_VSTOP, 0x7a); WriteReg(0x7a, 0x20); WriteReg(0x7b, 0x1c); WriteReg(0x7c, 0x28); WriteReg(0x7d, 0x3c); WriteReg(0x7e, 0x5a); WriteReg(0x7f, 0x68); WriteReg(0x80, 0x76); WriteReg(0x81, 0x80); WriteReg(0x82, 0x88); WriteReg(0x83, 0x8f); WriteReg(0x84, 0x96); WriteReg(0x85, 0xa3); WriteReg(0x86, 0xaf); WriteReg(0x87, 0xc4); WriteReg(0x88, 0xd7); WriteReg(0x89, 0xe8); WriteReg(0x13, 0xe0); WriteReg(0x00, 0x00); WriteReg(0x10, 0x00); WriteReg(0x0d, 0x40); WriteReg(0x14, 0x18); WriteReg(0xa5, 0x05); WriteReg(0xab, 0x07); WriteReg(0x24, 0x95); WriteReg(0x25, 0x33); WriteReg(0x26, 0xe3); WriteReg(0x9f, 0x78); WriteReg(0xa0, 0x68); WriteReg(0xa1, 0x03); WriteReg(0xa6, 0xd8); WriteReg(0xa7, 0xd8); WriteReg(0xa8, 0xf0); WriteReg(0xa9, 0x90); WriteReg(0xaa, 0x94); WriteReg(0x13, 0xe5); WriteReg(0x0e, 0x61); WriteReg(0x0f, 0x4b); WriteReg(0x16, 0x02); WriteReg(0x21, 0x02); WriteReg(0x22, 0x91); WriteReg(0x29, 0x07); WriteReg(0x33, 0x0b); WriteReg(0x35, 0x0b); WriteReg(0x37, 0x1d); WriteReg(0x38, 0x71); WriteReg(0x39, 0x2a); WriteReg(0x3c, 0x78); WriteReg(0x4d, 0x40); WriteReg(0x4e, 0x20); WriteReg(0x69, 0x00); WriteReg(0x74, 0x10); WriteReg(0x8d, 0x4f); WriteReg(0x8e, 0x00); WriteReg(0x8f, 0x00); WriteReg(0x90, 0x00); WriteReg(0x91, 0x00); WriteReg(0x92, 0x00); WriteReg(0x96, 0x00); WriteReg(0x9a, 0x80); WriteReg(0xb0, 0x84); WriteReg(0xb1, 0x0c); WriteReg(0xb2, 0x0e); WriteReg(0xb3, 0x82); WriteReg(0xb8, 0x0a); WriteReg(0x43, 0x0a); WriteReg(0x44, 0xf0); WriteReg(0x45, 0x34); WriteReg(0x46, 0x58); WriteReg(0x47, 0x28); WriteReg(0x48, 0x3a); WriteReg(0x59, 0x88); WriteReg(0x5a, 0x88); WriteReg(0x5b, 0x44); WriteReg(0x5c, 0x67); WriteReg(0x5d, 0x49); WriteReg(0x5e, 0x0e); WriteReg(0x64, 0x04); WriteReg(0x65, 0x20); WriteReg(0x66, 0x05); WriteReg(0x94, 0x04); WriteReg(0x95, 0x08); WriteReg(0x6c, 0x0a); WriteReg(0x6d, 0x55); WriteReg(0x6e, 0x11); WriteReg(0x6f, 0x9f); WriteReg(0x6a, 0x40); WriteReg(0x01, 0x40); WriteReg(0x02, 0x40); WriteReg(0x13, 0xe7); WriteReg(0x15, 0x02); WriteReg(0x4f, 0x80); WriteReg(0x50, 0x80); WriteReg(0x51, 0x00); WriteReg(0x52, 0x22); WriteReg(0x53, 0x5e); WriteReg(0x54, 0x80); WriteReg(0x58, 0x9e); WriteReg(0x41, 0x08); WriteReg(0x3f, 0x00); WriteReg(0x75, 0x05); WriteReg(0x76, 0xe1); WriteReg(0x4c, 0x00); WriteReg(0x77, 0x01); WriteReg(0x3d, 0xc1); WriteReg(0x4b, 0x09); WriteReg(0xc9, 0x60); WriteReg(0x41, 0x38); WriteReg(0x56, 0x40); WriteReg(0x34, 0x11); WriteReg(0x3b, 0x02); WriteReg(0xa4, 0x88); WriteReg(0x96, 0x00); WriteReg(0x97, 0x30); WriteReg(0x98, 0x20); WriteReg(0x99, 0x30); WriteReg(0x9a, 0x84); WriteReg(0x9b, 0x29); WriteReg(0x9c, 0x03); WriteReg(0x9d, 0x4c); WriteReg(0x9e, 0x3f); WriteReg(0x78, 0x04); WriteReg(0x79, 0x01); WriteReg(0xc8, 0xf0); WriteReg(0x79, 0x0f); WriteReg(0xc8, 0x00); WriteReg(0x79, 0x10); WriteReg(0xc8, 0x7e); WriteReg(0x79, 0x0a); WriteReg(0xc8, 0x80); WriteReg(0x79, 0x0b); WriteReg(0xc8, 0x01); WriteReg(0x79, 0x0c); WriteReg(0xc8, 0x0f); WriteReg(0x79, 0x0d); WriteReg(0xc8, 0x20); WriteReg(0x79, 0x09); WriteReg(0xc8, 0x80); WriteReg(0x79, 0x02); WriteReg(0xc8, 0xc0); WriteReg(0x79, 0x03); WriteReg(0xc8, 0x40); WriteReg(0x79, 0x05); WriteReg(0xc8, 0x30); WriteReg(0x79, 0x26); WriteReg(0x09, 0x03); WriteReg(0x3b, 0x42); WriteReg(0xff, 0xff); /* END MARKER */ } if(n == 76800) // 320*240 { WriteReg(REG_COM14, 0x19); WriteReg(0x72, 0x11); WriteReg(0x73, 0xf1); WriteReg(REG_HREF, 0x24); WriteReg(REG_HSTART, 0x16); WriteReg(REG_HSTOP, 0x04); WriteReg(REG_VREF, 0x0a); WriteReg(REG_VSTART,0x02); WriteReg(REG_VSTOP, 0x7a); WriteReg(0x7a, 0x20); WriteReg(0x7b, 0x1c); WriteReg(0x7c, 0x28); WriteReg(0x7d, 0x3c); WriteReg(0x7e, 0x55); WriteReg(0x7f, 0x68); WriteReg(0x80, 0x76); WriteReg(0x81, 0x80); WriteReg(0x82, 0x88); WriteReg(0x83, 0x8f); WriteReg(0x84, 0x96); WriteReg(0x85, 0xa3); WriteReg(0x86, 0xaf); WriteReg(0x87, 0xc4); WriteReg(0x88, 0xd7); WriteReg(0x89, 0xe8); WriteReg(0x13, 0xe0); WriteReg(0x00, 0x00); WriteReg(0x10, 0x00); WriteReg(0x0d, 0x00); WriteReg(0x14, 0x28); WriteReg(0xa5, 0x05); WriteReg(0xab, 0x07); WriteReg(0x24, 0x75); WriteReg(0x25, 0x63); WriteReg(0x26, 0xA5); WriteReg(0x9f, 0x78); WriteReg(0xa0, 0x68); WriteReg(0xa1, 0x03); WriteReg(0xa6, 0xdf); WriteReg(0xa7, 0xdf); WriteReg(0xa8, 0xf0); WriteReg(0xa9, 0x90); WriteReg(0xaa, 0x94); WriteReg(0x13, 0xe5); WriteReg(0x0e, 0x61); WriteReg(0x0f, 0x4b); WriteReg(0x16, 0x02); WriteReg(0x21, 0x02); WriteReg(0x22, 0x91); WriteReg(0x29, 0x07); WriteReg(0x33, 0x0b); WriteReg(0x35, 0x0b); WriteReg(0x37, 0x1d); WriteReg(0x38, 0x71); WriteReg(0x39, 0x2a); WriteReg(0x3c, 0x78); WriteReg(0x4d, 0x40); WriteReg(0x4e, 0x20); WriteReg(0x69, 0x00); WriteReg(0x6b, 0x00); WriteReg(0x74, 0x19); WriteReg(0x8d, 0x4f); WriteReg(0x8e, 0x00); WriteReg(0x8f, 0x00); WriteReg(0x90, 0x00); WriteReg(0x91, 0x00); WriteReg(0x92, 0x00); WriteReg(0x96, 0x00); WriteReg(0x9a, 0x80); WriteReg(0xb0, 0x84); WriteReg(0xb1, 0x0c); WriteReg(0xb2, 0x0e); WriteReg(0xb3, 0x82); WriteReg(0xb8, 0x0a); WriteReg(0x43, 0x14); WriteReg(0x44, 0xf0); WriteReg(0x45, 0x34); WriteReg(0x46, 0x58); WriteReg(0x47, 0x28); WriteReg(0x48, 0x3a); WriteReg(0x59, 0x88); WriteReg(0x5a, 0x88); WriteReg(0x5b, 0x44); WriteReg(0x5c, 0x67); WriteReg(0x5d, 0x49); WriteReg(0x5e, 0x0e); WriteReg(0x64, 0x04); WriteReg(0x65, 0x20); WriteReg(0x66, 0x05); WriteReg(0x94, 0x04); WriteReg(0x95, 0x08); WriteReg(0x6c, 0x0a); WriteReg(0x6d, 0x55); WriteReg(0x6e, 0x11); WriteReg(0x6f, 0x9f); WriteReg(0x6a, 0x40); WriteReg(0x01, 0x40); WriteReg(0x02, 0x40); WriteReg(0x13, 0xe7); WriteReg(0x15, 0x02); WriteReg(0x4f, 0x80); WriteReg(0x50, 0x80); WriteReg(0x51, 0x00); WriteReg(0x52, 0x22); WriteReg(0x53, 0x5e); WriteReg(0x54, 0x80); WriteReg(0x58, 0x9e); WriteReg(0x41, 0x08); WriteReg(0x3f, 0x00); WriteReg(0x75, 0x05); WriteReg(0x76, 0xe1); WriteReg(0x4c, 0x00); WriteReg(0x77, 0x01); WriteReg(0x3d, 0xc2); WriteReg(0x4b, 0x09); WriteReg(0xc9, 0x60); WriteReg(0x41, 0x38); WriteReg(0x56, 0x40); WriteReg(0x34, 0x11); WriteReg(0x3b, 0x02); WriteReg(0xa4, 0x89); WriteReg(0x96, 0x00); WriteReg(0x97, 0x30); WriteReg(0x98, 0x20); WriteReg(0x99, 0x30); WriteReg(0x9a, 0x84); WriteReg(0x9b, 0x29); WriteReg(0x9c, 0x03); WriteReg(0x9d, 0x4c); WriteReg(0x9e, 0x3f); WriteReg(0x78, 0x04); WriteReg(0x79, 0x01); WriteReg(0xc8, 0xf0); WriteReg(0x79, 0x0f); WriteReg(0xc8, 0x00); WriteReg(0x79, 0x10); WriteReg(0xc8, 0x7e); WriteReg(0x79, 0x0a); WriteReg(0xc8, 0x80); WriteReg(0x79, 0x0b); WriteReg(0xc8, 0x01); WriteReg(0x79, 0x0c); WriteReg(0xc8, 0x0f); WriteReg(0x79, 0x0d); WriteReg(0xc8, 0x20); WriteReg(0x79, 0x09); WriteReg(0xc8, 0x80); WriteReg(0x79, 0x02); WriteReg(0xc8, 0xc0); WriteReg(0x79, 0x03); WriteReg(0xc8, 0x40); WriteReg(0x79, 0x05); WriteReg(0xc8, 0x30); WriteReg(0x79, 0x26); WriteReg(0x09, 0x03); WriteReg(0x3b, 0x42); WriteReg(0xff, 0xff); /* END MARKER */ } if(n == 307200) // 640*480 { WriteReg(REG_CLKRC, 0x01); WriteReg(REG_TSLB, 0x04); WriteReg(REG_COM7, 0x01); WriteReg(DBLV, 0x4a); WriteReg(REG_COM3, 0); WriteReg(REG_COM14, 0); WriteReg(REG_HSTART, 0x13); WriteReg(REG_HSTOP, 0x01); WriteReg(REG_HREF, 0xb6); WriteReg(REG_VSTART, 0x02); WriteReg(REG_VSTOP, 0x7a); WriteReg(REG_VREF, 0x0a); WriteReg(0x72, 0x11); WriteReg(0x73, 0xf0); /* Gamma curve values */ WriteReg(0x7a, 0x20); WriteReg(0x7b, 0x10); WriteReg(0x7c, 0x1e); WriteReg(0x7d, 0x35); WriteReg(0x7e, 0x5a); WriteReg(0x7f, 0x69); WriteReg(0x80, 0x76); WriteReg(0x81, 0x80); WriteReg(0x82, 0x88); WriteReg(0x83, 0x8f); WriteReg(0x84, 0x96); WriteReg(0x85, 0xa3); WriteReg(0x86, 0xaf); WriteReg(0x87, 0xc4); WriteReg(0x88, 0xd7); WriteReg(0x89, 0xe8); /* AGC and AEC parameters. Note we start by disabling those features, then turn them only after tweaking the values. */ WriteReg(0x13, COM8_FASTAEC | COM8_AECSTEP | COM8_BFILT); WriteReg(0x00, 0); WriteReg(0x10, 0); WriteReg(0x0d, 0x40); WriteReg(0x14, 0x18); WriteReg(0xa5, 0x05); WriteReg(0xab, 0x07); WriteReg(0x24, 0x95); WriteReg(0x25, 0x33); WriteReg(0x26, 0xe3); WriteReg(0x9f, 0x78); WriteReg(0xa0, 0x68); WriteReg(0xa1, 0x03); WriteReg(0xa6, 0xd8); WriteReg(0xa7, 0xd8); WriteReg(0xa8, 0xf0); WriteReg(0xa9, 0x90); WriteReg(0xaa, 0x94); WriteReg(0x13, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC); /* Almost all of these are magic "reserved" values. */ WriteReg(0x0e, 0x61); WriteReg(0x0f, 0x4b); WriteReg(0x16, 0x02); WriteReg(0x1e, 0x27); WriteReg(0x21, 0x02); WriteReg(0x22, 0x91); WriteReg(0x29, 0x07); WriteReg(0x33, 0x0b); WriteReg(0x35, 0x0b); WriteReg(0x37, 0x1d); WriteReg(0x38, 0x71); WriteReg(0x39, 0x2a); WriteReg(0x3c, 0x78); WriteReg(0x4d, 0x40); WriteReg(0x4e, 0x20); WriteReg(0x69, 0); WriteReg(0x6b, 0x0a); WriteReg(0x74, 0x10); WriteReg(0x8d, 0x4f); WriteReg(0x8e, 0); WriteReg(0x8f, 0); WriteReg(0x90, 0); WriteReg(0x91, 0); WriteReg(0x96, 0); WriteReg(0x9a, 0); WriteReg(0xb0, 0x84); WriteReg(0xb1, 0x0c); WriteReg(0xb2, 0x0e); WriteReg(0xb3, 0x82); WriteReg(0xb8, 0x0a); /* More reserved magic, some of which tweaks white balance */ WriteReg(0x43, 0x0a); WriteReg(0x44, 0xf0); WriteReg(0x45, 0x34); WriteReg(0x46, 0x58); WriteReg(0x47, 0x28); WriteReg(0x48, 0x3a); WriteReg(0x59, 0x88); WriteReg(0x5a, 0x88); WriteReg(0x5b, 0x44); WriteReg(0x5c, 0x67); WriteReg(0x5d, 0x49); WriteReg(0x5e, 0x0e); WriteReg(0x6c, 0x0a); WriteReg(0x6d, 0x55); WriteReg(0x6e, 0x11); WriteReg(0x6f, 0x9f); WriteReg(0x6a, 0x40); WriteReg(0x01, 0x40); WriteReg(0x02, 0x60); WriteReg(0x13, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC|COM8_AWB); /* Matrix coefficients */ WriteReg(0x4f, 0x80); WriteReg(0x50, 0x80); WriteReg(0x51, 0); WriteReg(0x52, 0x22); WriteReg(0x53, 0x5e); WriteReg(0x54, 0x80); WriteReg(0x58, 0x9e); WriteReg(0x41, 0x08); WriteReg(0x3f, 0); WriteReg(0x75, 0x05); WriteReg(0x76, 0xe1); WriteReg(0x4c, 0); WriteReg(0x77, 0x01); WriteReg(0x3d, 0xc3); WriteReg(0x4b, 0x09); WriteReg(0xc9, 0x60); WriteReg(0x41, 0x38); WriteReg(0x56, 0x40); WriteReg(0x34, 0x11); WriteReg(0x3b, COM11_EXP|COM11_HZAUTO); WriteReg(0xa4, 0x88); WriteReg(0x96, 0); WriteReg(0x97, 0x30); WriteReg(0x98, 0x20); WriteReg(0x99, 0x30); WriteReg(0x9a, 0x84); WriteReg(0x9b, 0x29); WriteReg(0x9c, 0x03); WriteReg(0x9d, 0x4c); WriteReg(0x9e, 0x3f); WriteReg(0x78, 0x04); /* Extra-weird stuff. Some sort of multiplexor register */ WriteReg(0x79, 0x01); WriteReg(0xc8, 0xf0); WriteReg(0x79, 0x0f); WriteReg(0xc8, 0x00); WriteReg(0x79, 0x10); WriteReg(0xc8, 0x7e); WriteReg(0x79, 0x0a); WriteReg(0xc8, 0x80); WriteReg(0x79, 0x0b); WriteReg(0xc8, 0x01); WriteReg(0x79, 0x0c); WriteReg(0xc8, 0x0f); WriteReg(0x79, 0x0d); WriteReg(0xc8, 0x20); WriteReg(0x79, 0x09); WriteReg(0xc8, 0x80); WriteReg(0x79, 0x02); WriteReg(0xc8, 0xc0); WriteReg(0x79, 0x03); WriteReg(0xc8, 0x40); WriteReg(0x79, 0x05); WriteReg(0xc8, 0x30); WriteReg(0x79, 0x26); WriteReg(0xff, 0xff); /* END MARKER */ } return 1; } // write to camera void OV7670::WriteReg(int addr,int data) { _i2c.start(); _i2c.write(OV7670_WRITE); wait_us(OV7670_WRITEWAIT); _i2c.write(addr); wait_us(OV7670_WRITEWAIT); _i2c.write(data); _i2c.stop(); } // read from camera int OV7670::ReadReg(int addr) { int data; _i2c.start(); _i2c.write(OV7670_WRITE); wait_us(OV7670_WRITEWAIT); _i2c.write(addr); _i2c.stop(); wait_us(OV7670_WRITEWAIT); _i2c.start(); _i2c.write(OV7670_READ); wait_us(OV7670_WRITEWAIT); data = _i2c.read(OV7670_NOACK); _i2c.stop(); return data; }