Yuji Notsu
/
OV7670_camera_test
This program is for OV7670 and TFT-LCD(REL225L01)
Diff: OV7670.h
- Revision:
- 0:03f32e3679c8
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/OV7670.h Thu Feb 16 14:51:28 2012 +0000 @@ -0,0 +1,420 @@ +#include "mbed.h" + +#define OV7670_I2C_ADDR 0x42 + +/* + * Basic window sizes. These probably belong somewhere more globally + * useful. + */ +#define VGA_WIDTH 640 +#define VGA_HEIGHT 480 +#define QVGA_WIDTH 320 +#define QVGA_HEIGHT 240 +#define CIF_WIDTH 352 +#define CIF_HEIGHT 288 +#define QCIF_WIDTH 176 +#define QCIF_HEIGHT 144 + +/* Register */ +#define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */ +#define REG_BLUE 0x01 /* blue gain */ +#define REG_RED 0x02 /* red gain */ +#define REG_VREF 0x03 /* Pieces of GAIN, VSTART, VSTOP */ +#define REG_COM1 0x04 /* Control 1 */ +#define COM1_CCIR656 0x40 /* CCIR656 enable */ +#define REG_BAVE 0x05 /* U/B Average level */ +#define REG_GbAVE 0x06 /* Y/Gb Average level */ +#define REG_AECHH 0x07 /* AEC MS 5 bits */ +#define REG_RAVE 0x08 /* V/R Average level */ +#define REG_COM2 0x09 /* Control 2 */ +#define COM2_SSLEEP 0x10 /* Soft sleep mode */ +#define REG_PID 0x0a /* Product ID MSB */ +#define REG_VER 0x0b /* Product ID LSB */ +#define REG_COM3 0x0c /* Control 3 */ +#define COM3_SWAP 0x40 /* Byte swap */ +#define COM3_SCALEEN 0x08 /* Enable scaling */ +#define COM3_DCWEN 0x04 /* Enable downsamp/crop/window */ +#define REG_COM4 0x0d /* Control 4 */ +#define REG_COM5 0x0e /* All "reserved" */ +#define REG_COM6 0x0f /* Control 6 */ +#define REG_AECH 0x10 /* More bits of AEC value */ +#define REG_CLKRC 0x11 /* Clocl control */ +#define CLK_EXT 0x40 /* Use external clock directly */ +#define CLK_SCALE 0x3f /* Mask for internal clock scale */ +#define REG_COM7 0x12 /* Control 7 */ +#define COM7_RESET 0x80 /* Register reset */ +#define COM7_FMT_MASK 0x38 +#define COM7_FMT_VGA 0x00 +#define COM7_FMT_CIF 0x20 /* CIF format */ +#define COM7_FMT_QVGA 0x10 /* QVGA format */ +#define COM7_FMT_QCIF 0x08 /* QCIF format */ +#define COM7_RGB 0x04 /* bits 0 and 2 - RGB format */ +#define COM7_YUV 0x00 /* YUV */ +#define COM7_BAYER 0x01 /* Bayer format */ +#define COM7_PBAYER 0x05 /* "Processed bayer" */ +#define REG_COM8 0x13 /* Control 8 */ +#define COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */ +#define COM8_AECSTEP 0x40 /* Unlimited AEC step size */ +#define COM8_BFILT 0x20 /* Band filter enable */ +#define COM8_AGC 0x04 /* Auto gain enable */ +#define COM8_AWB 0x02 /* White balance enable */ +#define COM8_AEC 0x01 /* Auto exposure enable */ +#define REG_COM9 0x14 /* Control 9 - gain ceiling */ +#define REG_COM10 0x15 /* Control 10 */ +#define COM10_HSYNC 0x40 /* HSYNC instead of HREF */ +#define COM10_PCLK_HB 0x20 /* Suppress PCLK on horiz blank */ +#define COM10_HREF_REV 0x08 /* Reverse HREF */ +#define COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */ +#define COM10_VS_NEG 0x02 /* VSYNC negative */ +#define COM10_HS_NEG 0x01 /* HSYNC negative */ +#define REG_HSTART 0x17 /* Horiz start high bits */ +#define REG_HSTOP 0x18 /* Horiz stop high bits */ +#define REG_VSTART 0x19 /* Vert start high bits */ +#define REG_VSTOP 0x1a /* Vert stop high bits */ +#define REG_PSHFT 0x1b /* Pixel delay after HREF */ +#define REG_MIDH 0x1c /* Manuf. ID high */ +#define REG_MIDL 0x1d /* Manuf. ID low */ +#define REG_MVFP 0x1e /* Mirror / vflip */ +#define MVFP_MIRROR 0x20 /* Mirror image */ +#define MVFP_FLIP 0x10 /* Vertical flip */ + +#define REG_AEW 0x24 /* AGC upper limit */ +#define REG_AEB 0x25 /* AGC lower limit */ +#define REG_VPT 0x26 /* AGC/AEC fast mode op region */ +#define REG_HSYST 0x30 /* HSYNC rising edge delay */ +#define REG_HSYEN 0x31 /* HSYNC falling edge delay */ +#define REG_HREF 0x32 /* HREF pieces */ +#define REG_TSLB 0x3a /* lots of stuff */ +#define TSLB_YLAST 0x04 /* UYVY or VYUY - see com13 */ +#define REG_COM11 0x3b /* Control 11 */ +#define COM11_NIGHT 0x80 /* NIght mode enable */ +#define COM11_NMFR 0x60 /* Two bit NM frame rate */ +#define COM11_HZAUTO 0x10 /* Auto detect 50/60 Hz */ +#define COM11_50HZ 0x08 /* Manual 50Hz select */ +#define COM11_EXP 0x02 +#define REG_COM12 0x3c /* Control 12 */ +#define COM12_HREF 0x80 /* HREF always */ +#define REG_COM13 0x3d /* Control 13 */ +#define COM13_GAMMA 0x80 /* Gamma enable */ +#define COM13_UVSAT 0x40 /* UV saturation auto adjustment */ +#define COM13_UVSWAP 0x01 /* V before U - w/TSLB */ +#define REG_COM14 0x3e /* Control 14 */ +#define COM14_DCWEN 0x10 /* DCW/PCLK-scale enable */ +#define REG_EDGE 0x3f /* Edge enhancement factor */ +#define REG_COM15 0x40 /* Control 15 */ +#define COM15_R10F0 0x00 /* Data range 10 to F0 */ +#define COM15_R01FE 0x80 /* 01 to FE */ +#define COM15_R00FF 0xc0 /* 00 to FF */ +#define COM15_RGB565 0x10 /* RGB565 output */ +#define COM15_RGB555 0x30 /* RGB555 output */ +#define REG_COM16 0x41 /* Control 16 */ +#define COM16_AWBGAIN 0x08 /* AWB gain enable */ +#define REG_COM17 0x42 /* Control 17 */ +#define COM17_AECWIN 0xc0 /* AEC window - must match COM4 */ +#define COM17_CBAR 0x08 /* DSP Color bar */ + +/* + * This matrix defines how the colors are generated, must be + * tweaked to adjust hue and saturation. + * + * Order: v-red, v-green, v-blue, u-red, u-green, u-blue + * + * They are nine-bit signed quantities, with the sign bit + * stored in 0x58. Sign for v-red is bit 0, and up from there. + */ +#define REG_CMATRIX_BASE 0x4f +#define CMATRIX_LEN 6 +#define REG_CMATRIX_SIGN 0x58 + + +#define REG_BRIGHT 0x55 /* Brightness */ +#define REG_CONTRAS 0x56 /* Contrast control */ + +#define REG_GFIX 0x69 /* Fix gain control */ + +#define REG_REG76 0x76 /* OV's name */ +#define R76_BLKPCOR 0x80 /* Black pixel correction enable */ +#define R76_WHTPCOR 0x40 /* White pixel correction enable */ + +#define REG_RGB444 0x8c /* RGB 444 control */ +#define R444_ENABLE 0x02 /* Turn on RGB444, overrides 5x5 */ +#define R444_RGBX 0x01 /* Empty nibble at end */ + +#define REG_HAECC1 0x9f /* Hist AEC/AGC control 1 */ +#define REG_HAECC2 0xa0 /* Hist AEC/AGC control 2 */ + +#define REG_BD50MAX 0xa5 /* 50hz banding step limit */ +#define REG_HAECC3 0xa6 /* Hist AEC/AGC control 3 */ +#define REG_HAECC4 0xa7 /* Hist AEC/AGC control 4 */ +#define REG_HAECC5 0xa8 /* Hist AEC/AGC control 5 */ +#define REG_HAECC6 0xa9 /* Hist AEC/AGC control 6 */ +#define REG_HAECC7 0xaa /* Hist AEC/AGC control 7 */ +#define REG_BD60MAX 0xab /* 60hz banding step limit */ + +struct regval_list { + unsigned char reg_num; + unsigned char value; +}; + +static struct regval_list ov7670_default_regs[] = { + { REG_COM7, COM7_RESET }, +/* + * Clock scale: 3 = 15fps + * 2 = 20fps + * 1 = 30fps + */ + { REG_CLKRC, 1 }, /* OV: clock scale (30 fps), internal clk= external clk/(1+1) */ + { REG_TSLB, 0x04 }, /* OV */ + { REG_COM7, 0 }, /* VGA,YUV */ + /* + * Set the hardware window. These values from OV don't entirely + * make sense - hstop is less than hstart. But they work... + */ + { REG_HSTART, 0x13 }, { REG_HSTOP, 0x01 }, + { REG_HREF, 0xb6 }, { REG_VSTART, 0x02 }, + { REG_VSTOP, 0x7a }, { REG_VREF, 0x0a }, + + { REG_COM3, 0 }, { REG_COM14, 0 }, + /* Mystery scaling numbers */ + { 0x70, 0x3a }, //Bit[7]:Test Pattern + //Bit[6:0]:Horizontal scale factor + { 0x71, 0x35 }, //Bit[7]:Test Pattern (/w 0x70) + //Bit[6:0]:Vertical scale factor + { 0x72, 0x11 }, //DCW control + //Bit[7] Vertical average calculation option + // 0:Vertical truncation + // 1:Vertical rounding + //Bit[6] Vertical down sampling option + // 0:Vertical truncation + // 1:Vertical rounding + //Bit[5:4] Vertical down sampling rate + // 00:No down sampling, 01: by2, 10:by4, 11:by8 + //Bit[3] Horizontal averagecalculation option + // 0: Horizontal truncation + // 1: Horizontal rounding + //Bit[2] Horizontal down sampling option + // 0: Horizontal truncation + // 1: Horizontal rounding + //Bit[1:0] Horizontal down sampling rate + // 00: No down sampling, 01: by2, 10:by4, 11:by8 + { 0x73, 0xf0 }, //Bit[7:4] Reserved (Original : 0b1111) + //Bit[3] Bypass clock divider for DSP scale control + // 0: Enable clock divider, 1:Bypass clock divider + // Bit[2:0] Clock divider control for DSP scale control + // 000: Divided by 1, 001:Divided by 2, 010:Divided by4 + // 100: Divided by 8, 101:Divided by 16, 110-111:Not allowed + { 0xa2, 0x02 }, //Pixel Clock Delay + //Bit[7]: Reserved (original:0) + //Bit[6:0] Scaling output delay (original :0x02) + { REG_COM10, 0x20 },//Common Control 10 (original :0x00) + //Bit[7] Reserved + //Bit[6] HREF changed to HSYNC + //Bit[5] PCLK output option (0: Free running PCLK, 1: PCLK does not toggle during horizontal blank) + //Bit[4] PCLK reverse + //Bit[3] HREF reverse + //Bit[2] VSYNC option (0: VSYNC changes on falling edge of PCLK, 1:rising edge) + //Bit[1] VSYNC negative + //Bit[0] HSYNC negative + + /* Gamma curve values */ + { 0x7a, 0x20 }, { 0x7b, 0x10 }, + { 0x7c, 0x1e }, { 0x7d, 0x35 }, + { 0x7e, 0x5a }, { 0x7f, 0x69 }, + { 0x80, 0x76 }, { 0x81, 0x80 }, + { 0x82, 0x88 }, { 0x83, 0x8f }, + { 0x84, 0x96 }, { 0x85, 0xa3 }, + { 0x86, 0xaf }, { 0x87, 0xc4 }, + { 0x88, 0xd7 }, { 0x89, 0xe8 }, + + /* AGC and AEC parameters. Note we start by disabling those features, + then turn them only after tweaking the values. */ + { REG_COM8, COM8_FASTAEC | COM8_AECSTEP | COM8_BFILT }, + // Common control 8 (for AGC, AEC Off) + { REG_GAIN, 0 }, + { REG_AECH, 0x04 }, //AEC[9:2] + { 0x07, 0x00 }, //Bit[7:6] Reserved + //Bit[5:0] AEC[15:10] + { 0x04, 0x00 }, //Common control 1 + //Bit[7] Reserved + //Bit[6] CCIR format (0:Disable, 1:Enable) + //Bit[5:2] Reserved + //Bit[1:0] AEC[1:0] + { REG_COM4, 0x40 }, /* magic reserved bit */ + //Bit[7:6] Reserved (Original 0b01) + //Bit[5:4] Average option(must be same value as COM17[7:6])(Original 0b00) + //Bit[3:0] Reserved (Original 0b0000) + { REG_COM9, 0x18 }, /* 4x gain + magic rsvd bit */ + { REG_BD50MAX, 0x05 }, { REG_BD60MAX, 0x07 }, + { REG_AEW, 0x95 }, //AGC/AEC - Stable Operating Region(Upper limit) + { REG_AEB, 0x33 }, //AGC/AEC - Stable Operating Region(Lower limit) + { REG_VPT, 0xe3 }, //AGC/AEC Fast mode Operating Region + //Bit[7:4]: High nibble of upper limit of fast mode control zone + //Bit[3:0]: High nibble of lower limit of fast mode control zone + { REG_HAECC1, 0x78 },// Histgram based AEC/AGC Control 1 (Original : 0x78, Spec init:0xC0) + { REG_HAECC2, 0x68 },// Histgram based AEC/AGC Control 2 (Original : 0x68, Spec init:0x90) + { 0xa1, 0x03 }, /* magic */ + { REG_HAECC3, 0xd8 },// Histgram based AEC/AGC Control 3 (Original : 0xd8, Spec init:0xF0) + { REG_HAECC4, 0xd8 },// Histgram based AEC/AGC Control 4 (Original : 0xd8, Spec init:0xC1) + { REG_HAECC5, 0xf0 },// Histgram based AEC/AGC Control 5 (Original : 0xf0, Spec init:0xf0) + { REG_HAECC6, 0x90 },// Histgram based AEC/AGC Control 6 (Original : 0x90, Spec init:0xC1) + { REG_HAECC7, 0x94 },// Histgram based AEC/AGC Control 7 (Original : 0x94, Spec init:0x14) + //Bit[7]: AEC algorithm selection(0:Average-based, 1:Histogram-based) + //Bit[6:0] Reserved + { REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC }, + //COM8_FASTAEC 0x80 /* Enable fast AGC/AEC */ + //COM8_AECSTEP 0x40 /* Unlimited AEC step size */ + //COM8_BFILT 0x20 /* Band filter enable */ + //COM8_AGC 0x04 /* Auto gain enable */ + //COM8_AWB 0x02 /* White balance enable */ + //COM8_AEC 0x01 /* Auto exposure enable */ + /* Almost all of these are magic "reserved" values. */ + { REG_COM5, 0x61 }, //Bit[7:0] Reserved + { REG_COM6, 0x4b }, //Bit[7]: Output optical black line output 0:Disable,1:Enable(original:0) + //Bit[6:2] Reserved (0b10010) + //Bit[1] Reset all timing when format changes 0:No reset,1:Reset (original:1) + //Bit[0] Reserved (1) + { 0x16, 0x02 }, //Reserved + { REG_MVFP, 0x03 }, //Bit[7:6] Reserved (original 0b00) + //Bit[5] Mirror 0:Normal, 1:Mirror (original 0) + //Bit[4] VFlip 0:Normal, 1:Vertically flip (origianl 0) + //Bit[3] Reserved (original 0) + //Bit[2] Black sun enable (original 1) + //Bit[1:0] Reserved (original 0b11) + { 0x21, 0x02 }, { 0x22, 0x91 }, + { 0x29, 0x07 }, { 0x33, 0x0b }, + { 0x35, 0x0b }, { 0x37, 0x1d }, + { 0x38, 0x71 }, { 0x39, 0x2a }, + { REG_COM12, 0x68 }, { 0x4d, 0x40 }, + { 0x4e, 0x20 }, { REG_GFIX, 0 }, + { 0x6b, 0xca }, //Bit[7:6] PLL control Original:11(x8) + { 0x74, 0x10 }, //Bit[4]: Digital gain contrl: 1:by VREF[7:6],0:by REG74[1:0] + { 0x8d, 0x4f }, { 0x8e, 0 }, + { 0x8f, 0 }, { 0x90, 0 }, + { 0x91, 0 }, { 0x96, 0 }, + { 0x9a, 0 }, { 0xb0, 0x84 }, + { 0xb1, 0x0c }, { 0xb2, 0x0e }, + { 0xb3, 0x82 }, { 0xb8, 0x0a }, + + /* More reserved magic, some of which tweaks white balance */ + { 0x43, 0x0a }, { 0x44, 0xf0 }, + { 0x45, 0x34 }, { 0x46, 0x58 }, + { 0x47, 0x28 }, { 0x48, 0x3a }, + { 0x59, 0x88 }, { 0x5a, 0x88 }, + { 0x5b, 0x44 }, { 0x5c, 0x67 }, + { 0x5d, 0x49 }, { 0x5e, 0x0e }, + { 0x6c, 0x0a }, { 0x6d, 0x55 }, + { 0x6e, 0x11 }, { 0x6f, 0x9f }, /* "9e for advance AWB" */ + { 0x6a, 0x40 }, { REG_BLUE, 0x40 }, + { REG_RED, 0x60 }, + //{ REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AEC|COM8_AWB }, + { REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_BFILT|COM8_AGC|COM8_AWB }, + /* Matrix coefficients */ //default value + { 0x4f, 0x80 }, { 0x50, 0x80 }, + { 0x51, 0 }, { 0x52, 0x22 }, + { 0x53, 0x5e }, { 0x54, 0x80 }, + { 0x58, 0x9e }, + + { REG_COM16, COM16_AWBGAIN }, + { REG_EDGE, 0x00 }, //Bit[7:5]: Reserved + //Bit[4:0]: Edge enchandement factor (original: 0x00) + { 0x75, 0x05 }, //Bit[7:5] : reserved, Bit[4:0] : Edge Enhancement lower limit (original:0x05) + { 0x76, 0xff }, //Bit[7]:Black correction enable 0:Disable, 1:Enable(original:1) + //Bit[6]:White pixel correction enable: 0:Disable, 1:Enable(original:1) + //Bit[5]:Reserved (original:0b10) + //Bit[4:0]: Edge Enhancement higher limit(original:0x01) + { 0x4c, 0 }, //De-noise Setength + { 0x77, 0x00 }, //De-noise offset (original 0x01) + { REG_COM13, 0xc3 }, //Common Control 13 + //Bit[7] Gamma enable + //Bit[6] UV saturation level + //Bit[5:1] Reserved + //Bit[0] UV swap + { 0x4b, 0x09 }, //Bit[7:1] Reserved + //Bit[0] UV average enable + { 0xc9, 0x60 }, //Saturation Control + //Bit[7:4] UV saturation control min + //Bit[3:0] UV saturation control result + { REG_COM16, 0x38 }, //Common control 16 (Original 0b00111000) + //Bit[7:6] Reserved (Original 0b00) + //Bit[5] Enable edge enhancement threshold auto-adjustment for YUV output (Original 1) + //Bit[4] De-noise threshold auto-adjustment (0:Disable, 1:Enable)(Original 1) + //Bit[3] AWB gain enable (Original 1) + //Bit[2] Reserved + //Bit[1] Color matrix coefficient double option (0: Original, 1:Double) + //Bit[0] Reserved (Original 0) + { 0x56, 0x40 }, //Martix Coefficient Sign for Coefficient 5 to 0 + //Bit[7] Auto contrast center enable + //Bit[6] Reserved + //Bit[5:0] Matrix coefficient sign (0:Plus, 1:Minus) + { 0x34, 0x11 }, //Array Reference Control Bit[7:0] Reserved + { REG_COM11, COM11_EXP|COM11_HZAUTO }, //Common control 11 + //Bit[7] Night mode (0:disable, 1:Enable) + //Bit[6:5] Minimum frame rate of night mode + //00:same, 01:1/2, 10:1/4, 11:1/8 + //Bit[4] D56_Auto (0:Disable, 1:Enable) + //Bit[3] Banding filter value select + // 0: Select BD60ST, 1:Select BD50ST + //Bit[2] Reserved + //Bit[1] Exprosure timing can be less than limit of banding filter + //Bit[0] Reserved + { 0xa4, 0x88 }, { 0x96, 0 }, + { 0x97, 0x30 }, { 0x98, 0x20 }, + { 0x99, 0x30 }, { 0x9a, 0x84 }, + { 0x9b, 0x29 }, { 0x9c, 0x03 }, + { 0x9d, 0x4c }, { 0x9e, 0x3f }, + { 0x78, 0x04 }, + + /* Extra-weird stuff. Some sort of multiplexor register */ + { 0x79, 0x01 }, { 0xc8, 0xf0 }, + { 0x79, 0x0f }, { 0xc8, 0x00 }, + { 0x79, 0x10 }, { 0xc8, 0x7e }, + { 0x79, 0x0a }, { 0xc8, 0x80 }, + { 0x79, 0x0b }, { 0xc8, 0x01 }, + { 0x79, 0x0c }, { 0xc8, 0x0f }, + { 0x79, 0x0d }, { 0xc8, 0x20 }, + { 0x79, 0x09 }, { 0xc8, 0x80 }, + { 0x79, 0x02 }, { 0xc8, 0xc0 }, + { 0x79, 0x03 }, { 0xc8, 0x40 }, + { 0x79, 0x05 }, { 0xc8, 0x30 }, + { 0x79, 0x26 }, + + /* Added register value */ + //{ 0x30, 0x00 }, //REG_HSYSET (HSYNC Rising Edge Delay : 08 -> 00 + //{ 0x2A, 0x00 }, // Dummy Pixel insert MSB + //{ 0x2B, 0x00 }, // Dummy Pixel insert MSB + { 0x15, 0x05 }, // Common Control 10 : Bit[4] 1:PCLK negative + { 0x3A, 0x05 }, //Bit[7:6]: Reserved (origina:0b00) + //Bit[5]: Negative Image 0:Normal, 1:Negative (original:0) + //Bit[4]: UV output value 0:Normal, 1:User define (original:0) + //Bit[3]: Output sequence (original:1) + //Bit[2:1]:reserved + //Bit[0]: Auto output window + + { 0xff, 0xff }, /* END MARKER */ +}; + +static struct regval_list ov7670_fmt_rgb565[] = { + { REG_COM7, COM7_FMT_QVGA|COM7_RGB }, /* Selects RGB mode */ + { REG_RGB444, 0 }, /* No RGB444 please */ + { REG_COM1, 0x0 }, + { REG_COM15, 0xc0 | COM15_RGB565 }, + { REG_COM9, 0x28 }, /* 16x gain ceiling; 0x8 is reserved bit */ + { 0x4f, 0xb3 }, /* "matrix coefficient 1" */ + { 0x50, 0xb3 }, /* "matrix coefficient 2" */ + { 0x51, 0 }, /* vb */ + { 0x52, 0x3d }, /* "matrix coefficient 4" */ + { 0x53, 0xa7 }, /* "matrix coefficient 5" */ + { 0x54, 0xe4 }, /* "matrix coefficient 6" */ + { REG_COM13, COM13_GAMMA|COM13_UVSAT }, + { 0xff, 0xff }, +}; + +// QVGA setting +const int width = QVGA_WIDTH; +const int height= QVGA_HEIGHT; +const int com7_bit= COM7_FMT_QVGA; +const int hstart= 164; /* Empirically determined */ +const int hstop= 20; //Original code: 20 +const int vstart= 14; +const int vstop= 494; +