eagler8
发表于 2019-8-3 18:41:20
eagler8
发表于 2019-8-3 18:43:32
eagler8
发表于 2019-8-3 18:47:10
eagler8
发表于 2019-8-3 18:48:45
eagler8
发表于 2019-8-4 09:20:37
OV7670摄像头模块实验接线图，没找到4.7K电阻，都用10K了。一天之内学习和了解这么多的东西，完全没有头绪，这实验肯定失败的，没想到太复杂了，不抱什么希望试试看吧。
eagler8
发表于 2019-8-4 09:27:33
本帖最后由 eagler8 于 2019-8-4 10:03 编辑
3V3-------输入电源电压（推荐使用3.3，5V也可，但不推荐）
GDN------接地点
SIO_C-----SCCB接口的控制时钟（注意：部分低级单片机需要上拉控制，和I2C接口类似）
SIO_D-----SCCB接口的串行数据输入（出）端（注意：部分低级单片机需要上拉控制，和I2C接口类似）
VSYNC----帧同步信号（输出信号）
HREF------行同步信号（输出信号）
PCLK------像素时钟（输出信号）
D0-D7-----数据端口（输出信号）
RESTE-----复位端口（正常使用拉高）
PWDN-----功耗选择模式（正常使用拉低）
eagler8
发表于 2019-8-4 11:46:22
/*
【Arduino】66种传感器模块系列实验（80）
实验八十： OV7670摄像头模块30W采集拍照模组（替OV7725）
程序通过验证，上传成功，结果是13脚LED一直闪烁，不知那根线接错了，
已经检查二遍了，还是不对，准备重新再连接一次，再不行只好放弃
备注：程序烧录进arduino后，除了power灯之外，如果led灯（13脚）亮，说明出错，
连接有问题，请检查插线，正常会显示tx灯闪烁，隔一段闪一次，不是狂闪，闪一次说
明采集完成了一张照片，也就是读取了一帧，并传输完成，使用windows系统的采集软件
ReadSerialPortWin打开图像并保存。
*/
//wukongxuetang teacher zhang
// Source code for application to transmit image from ov7670 to PC via USB
// By Siarhei Charkes in 2015
// http://privateblog.info
#include <stdint.h>
#include <avr/io.h>
#include <util/twi.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#define F_CPU 16000000UL
#define vga 0
#define qvga1
#define qqvga 2
#define yuv4220
#define rgb5651
#define bayerRGB2
#define camAddr_WR0x42
#define camAddr_RD0x43
/* Registers */
#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_CCIR6560x40 /* 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 */ //REG mean address.
#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/* "rocessed 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 in0x58.Sign for v-red is bit 0, and up from there.
*/
#define REG_CMATRIX_BASE0x4f
#define CMATRIX_LEN 6
#define REG_CMATRIX_SIGN0x58
#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 */
#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/* "rocessed 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 */
#define CMATRIX_LEN 6
#define REG_BRIGHT 0x55/* Brightness */
#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 */
#define MTX1 0x4f/* Matrix Coefficient 1 */
#define MTX2 0x50/* Matrix Coefficient 2 */
#define MTX3 0x51/* Matrix Coefficient 3 */
#define MTX4 0x52/* Matrix Coefficient 4 */
#define MTX5 0x53/* Matrix Coefficient 5 */
#define MTX6 0x54/* Matrix Coefficient 6 */
#define REG_CONTRAS 0x56/* Contrast control */
#define MTXS 0x58/* Matrix Coefficient Sign */
#define AWBC7 0x59/* AWB Control 7 */
#define AWBC8 0x5a/* AWB Control 8 */
#define AWBC9 0x5b/* AWB Control 9 */
#define AWBC10 0x5c/* AWB Control 10 */
#define AWBC11 0x5d/* AWB Control 11 */
#define AWBC12 0x5e/* AWB Control 12 */
#define REG_GFI 0x69/* Fix gain control */
#define GGAIN 0x6a/* G Channel AWB Gain */
#define DBLV 0x6b
#define AWBCTR3 0x6c/* AWB Control 3 */
#define AWBCTR2 0x6d/* AWB Control 2 */
#define AWBCTR1 0x6e/* AWB Control 1 */
#define AWBCTR0 0x6f/* AWB Control 0 */
struct regval_list{
uint8_t reg_num;
uint16_t value;
};
const struct regval_list qvga_ov7670[] PROGMEM = {
{ REG_COM14, 0x19 },
{ 0x72, 0x11 },
{ 0x73, 0xf1 },
{ REG_HSTART, 0x16 },
{ REG_HSTOP, 0x04 },
{ REG_HREF, 0xa4 },
{ REG_VSTART, 0x02 },
{ REG_VSTOP, 0x7a },
{ REG_VREF, 0x0a },
/*{ REG_HSTART, 0x16 },
{ REG_HSTOP, 0x04 },
{ REG_HREF, 0x24 },
{ REG_VSTART, 0x02 },
{ REG_VSTOP, 0x7a },
{ REG_VREF, 0x0a },*/
{ 0xff, 0xff }, /* END MARKER */
};
const struct regval_list yuv422_ov7670[] PROGMEM = {
{ REG_COM7, 0x0 },/* Selects YUV mode */
{ REG_RGB444, 0 },/* No RGB444 please */
{ REG_COM1, 0 },
{ REG_COM15, COM15_R00FF },
{ REG_COM9, 0x6A }, /* 128x gain ceiling; 0x8 is reserved bit */
{ 0x4f, 0x80 }, /* "matrix coefficient 1" */
{ 0x50, 0x80 }, /* "matrix coefficient 2" */
{ 0x51, 0 }, /* vb */
{ 0x52, 0x22 }, /* "matrix coefficient 4" */
{ 0x53, 0x5e }, /* "matrix coefficient 5" */
{ 0x54, 0x80 }, /* "matrix coefficient 6" */
{ REG_COM13, COM13_UVSAT },
{ 0xff, 0xff }, /* END MARKER */
};
const struct regval_list ov7670_default_regs[] PROGMEM = {//from the linux driver
{ REG_COM7, COM7_RESET },
{ REG_TSLB, 0x04 }, /* OV */
{ REG_COM7, 0 },/* VGA */
/*
* 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 }, { 0x71, 0x35 },
{ 0x72, 0x11 }, { 0x73, 0xf0 },
{ 0xa2,/* 0x02 changed to 1*/1 }, { REG_COM10, 0x0 },
/* 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 },
{ REG_GAIN, 0 }, { REG_AECH, 0 },
{ REG_COM4, 0x40 }, /* magic reserved bit */
{ REG_COM9, 0x18 }, /* 4x gain + magic rsvd bit */
{ REG_BD50MAX, 0x05 }, { REG_BD60MAX, 0x07 },
{ REG_AEW, 0x95 }, { REG_AEB, 0x33 },
{ REG_VPT, 0xe3 }, { REG_HAECC1, 0x78 },
{ REG_HAECC2, 0x68 }, { 0xa1, 0x03 }, /* magic */
{ REG_HAECC3, 0xd8 }, { REG_HAECC4, 0xd8 },
{ REG_HAECC5, 0xf0 }, { REG_HAECC6, 0x90 },
{ REG_HAECC7, 0x94 },
{ REG_COM8, COM8_FASTAEC | COM8_AECSTEP | COM8_AGC | COM8_AEC },
{ 0x30, 0 }, { 0x31, 0 },//disable some delays
/* Almost all of these are magic "reserved" values.*/
{ REG_COM5, 0x61 }, { REG_COM6, 0x4b },
{ 0x16, 0x02 }, { REG_MVFP, 0x07 },
{ 0x21, 0x02 }, { 0x22, 0x91 },
{ 0x29, 0x07 }, { 0x33, 0x0b },
{ 0x35, 0x0b }, { 0x37, 0x1d },
{ 0x38, 0x71 }, { 0x39, 0x2a },
{ REG_COM12, 0x78 }, { 0x4d, 0x40 },
{ 0x4e, 0x20 }, { REG_GFIX, 0 },
/*{0x6b, 0x4a},*/{ 0x74, 0x10 },
{ 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, 0x9e }, /* it was 0x9F "9e for advance AWB" */
{ 0x6a, 0x40 }, { REG_BLUE, 0x40 },
{ REG_RED, 0x60 },
{ REG_COM8, COM8_FASTAEC | COM8_AECSTEP | COM8_AGC | COM8_AEC | COM8_AWB },
/* Matrix coefficients */
{ 0x4f, 0x80 }, { 0x50, 0x80 },
{ 0x51, 0 }, { 0x52, 0x22 },
{ 0x53, 0x5e }, { 0x54, 0x80 },
{ 0x58, 0x9e },
{ REG_COM16, COM16_AWBGAIN }, { REG_EDGE, 0 },
{ 0x75, 0x05 }, { REG_REG76, 0xe1 },
{ 0x4c, 0 }, { 0x77, 0x01 },
{ REG_COM13, /*0xc3*/0x48 }, { 0x4b, 0x09 },
{ 0xc9, 0x60 }, /*{REG_COM16, 0x38},*/
{ 0x56, 0x40 },
{ 0x34, 0x11 }, { REG_COM11, COM11_EXP | COM11_HZAUTO },
{ 0xa4, 0x82/*Was 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 },
{ 0xff, 0xff }, /* END MARKER */
};
void error_led(void){
DDRB |= 32;//make sure led is output
while (1){//wait for reset
PORTB ^= 32;// toggle led
_delay_ms(100);
}
}
void twiStart(void){
TWCR = _BV(TWINT) | _BV(TWSTA) | _BV(TWEN);//send start
while (!(TWCR & (1 << TWINT)));//wait for start to be transmitted
if ((TWSR & 0xF8) != TW_START)
error_led();
}
void twiWriteByte(uint8_t DATA, uint8_t type){
TWDR = DATA;
TWCR = _BV(TWINT) | _BV(TWEN);
while (!(TWCR & (1 << TWINT))) {}
if ((TWSR & 0xF8) != type)
error_led();
}
void twiAddr(uint8_t addr, uint8_t typeTWI){
TWDR = addr;//send address
TWCR = _BV(TWINT) | _BV(TWEN); /* clear interrupt to start transmission */
while ((TWCR & _BV(TWINT)) == 0); /* wait for transmission */
if ((TWSR & 0xF8) != typeTWI)
error_led();
}
void wrReg(uint8_t reg, uint8_t dat){
//send start condition
twiStart();
twiAddr(camAddr_WR, TW_MT_SLA_ACK);
twiWriteByte(reg, TW_MT_DATA_ACK);
twiWriteByte(dat, TW_MT_DATA_ACK);
TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);//send stop
_delay_ms(1);
}
static uint8_t twiRd(uint8_t nack){
if (nack){
TWCR = _BV(TWINT) | _BV(TWEN);
while ((TWCR & _BV(TWINT)) == 0); /* wait for transmission */
if ((TWSR & 0xF8) != TW_MR_DATA_NACK)
error_led();
return TWDR;
}
else{
TWCR = _BV(TWINT) | _BV(TWEN) | _BV(TWEA);
while ((TWCR & _BV(TWINT)) == 0); /* wait for transmission */
if ((TWSR & 0xF8) != TW_MR_DATA_ACK)
error_led();
return TWDR;
}
}
uint8_t rdReg(uint8_t reg){
uint8_t dat;
twiStart();
twiAddr(camAddr_WR, TW_MT_SLA_ACK);
twiWriteByte(reg, TW_MT_DATA_ACK);
TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);//send stop
_delay_ms(1);
twiStart();
twiAddr(camAddr_RD, TW_MR_SLA_ACK);
dat = twiRd(1);
TWCR = (1 << TWINT) | (1 << TWEN) | (1 << TWSTO);//send stop
_delay_ms(1);
return dat;
}
void wrSensorRegs8_8(const struct regval_list reglist[]){
uint8_t reg_addr, reg_val;
const struct regval_list *next = reglist;
while ((reg_addr != 0xff) | (reg_val != 0xff)){
reg_addr = pgm_read_byte(&next->reg_num);
reg_val = pgm_read_byte(&next->value);
wrReg(reg_addr, reg_val);
next++;
}
}
void setColor(void){
wrSensorRegs8_8(yuv422_ov7670);
}
void setRes(void){
wrReg(REG_COM3, 4); // REG_COM3 enable scaling
wrSensorRegs8_8(qvga_ov7670);
}
void camInit(void){
wrReg(0x12, 0x80);
_delay_ms(100);
wrSensorRegs8_8(ov7670_default_regs);
wrReg(REG_COM10, 32);//PCLK does not toggle on HBLANK.
}
void arduinoUnoInut(void) {
cli();//disable interrupts
/* Setup the 8mhz PWM clock
* This will be on pin 11*/
DDRB |= (1 << 3);//pin 11
ASSR &= ~(_BV(EXCLK) | _BV(AS2));
TCCR2A = (1 << COM2A0) | (1 << WGM21) | (1 << WGM20);
TCCR2B = (1 << WGM22) | (1 << CS20);
OCR2A = 0;//(F_CPU)/(2*(X+1))
DDRC &= ~15;//low d0-d3 camera
DDRD &= ~252;//d7-d4 and interrupt pins
_delay_ms(3000);
//set up twi for 100khz
TWSR &= ~3;//disable prescaler for TWI
TWBR = 72;//set to 100khz
//enable serial
UBRR0H = 0;
UBRR0L = 1;//0 = 2M baud rate. 1 = 1M baud. 3 = 0.5M. 7 = 250k 207 is 9600 baud rate.
UCSR0A |= 2;//double speed aysnc
UCSR0B = (1 << RXEN0) | (1 << TXEN0);//Enable receiver and transmitter
UCSR0C = 6;//async 1 stop bit 8bit char no parity bits
}
void StringPgm(const char * str){
do{
while (!(UCSR0A & (1 << UDRE0)));//wait for byte to transmit
UDR0 = pgm_read_byte_near(str);
while (!(UCSR0A & (1 << UDRE0)));//wait for byte to transmit
} while (pgm_read_byte_near(++str));
}
static void captureImg(uint16_t wg, uint16_t hg){
uint16_t y, x;
StringPgm(PSTR("*RDY*"));
while (!(PIND & 8));//wait for high
while ((PIND & 8));//wait for low
y = hg;
while (y--){
x = wg;
//while (!(PIND & 256));//wait for high
while (x--){
while ((PIND & 4));//wait for low
UDR0 = (PINC & 15) | (PIND & 240);
while (!(UCSR0A & (1 << UDRE0)));//wait for byte to transmit
while (!(PIND & 4));//wait for high
while ((PIND & 4));//wait for low
while (!(PIND & 4));//wait for high
}
//while ((PIND & 256));//wait for low
}
// _delay_ms(100);
}
void setup(){
arduinoUnoInut();
camInit();
setRes();
setColor();
wrReg(0x11, 10); //Earlier it had the value: wrReg(0x11, 12); New version works better for me!!!!
}
void loop(){
captureImg(320, 240);
}
eagler8
发表于 2019-8-4 11:54:45
:o 虽然能通过验证并上传成功，还是发现有红字的警告，不懂如何处理
ino:24:0: warning: "F_CPU" redefined
#define F_CPU 16000000UL
^
<command-line>:0:0: note: this is the location of the previous definition
eagler8
发表于 2019-8-4 12:12:46
zlione
发表于 2019-8-4 13:58:34
收藏了:lol:lol:lol:lol
eagler8
发表于 2019-8-4 14:29:07
/*
【Arduino】66种传感器模块系列实验（80）
实验八十： OV7670摄像头模块30W采集拍照模组（替OV7725）
程序之二
直接用arduino的Wire库函数对ov7670 fifo寄存器进行操作需要注意的是：
1.要对官方给的芯片地址0x42向右移一位；
2.要先对其进行复位也就是将0x12寄存器写0x80；
3.这里读的是两个寄存器这里读的分别是两个标志寄存器PID和VER，地址分别是0x0a和0x0b。
然后运行的结果就像后图
*/
#include <Wire.h>
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
Wire.begin();
Wire.beginTransmission(0x42>>1);
Wire.write(0x12);
Wire.write(0x80);
Wire.endTransmission();
delay(10);
}
void loop() {
// put your main code here, to run repeatedly:
Wire.beginTransmission(0x42>>1);
Wire.write(0x0a);
Wire.endTransmission();
Wire.requestFrom((0x42>>1), 2);
byte data1 = Wire.read();
byte data2 = Wire.read();
Serial.println(data1,HEX);
Serial.println(data2,HEX);
Serial.println("********");
delay(1000);
}
eagler8
发表于 2019-8-4 14:31:11
eagler8
发表于 2019-8-4 14:32:41
zlione 发表于 2019-8-4 13:58
收藏了
:lol:lol:lol 谢谢鼓励，有空多交流
eagler8
发表于 2019-8-4 14:52:57
/*
【Arduino】66种传感器模块系列实验（80）
实验八十： OV7670摄像头模块30W采集拍照模组（替OV7725）
在github.com上的最新OV7670库文件
OV7670.h
*/
#pragma once
#include <stdint.h>
void wrReg(uint8_t reg,uint8_t dat);
uint8_t rdReg(uint8_t reg);
enum RESOLUTION{VGA,QVGA,QQVGA};
enum COLORSPACE{YUV422,RGB565,BAYER_RGB};
struct regval_list{
uint8_t reg_num;
uint8_t value;
};
void setColorSpace(enum COLORSPACE color);
void setRes(enum RESOLUTION res);
void camInit(void);
#define OV7670_I2C_ADDRESS 0x21
/* Registers */
#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 in0x58.Sign for v-red is bit 0, and up from there.
*/
#define REG_CMATRIX_BASE0x4f
#define CMATRIX_LEN 6
#define REG_CMATRIX_SIGN0x58
#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 */
#define COM7_FMT_CIF 0x20 /* CIF 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 COM10_VS_LEAD 0x04 /* VSYNC on clock leading edge */
#define COM11_50HZ 0x08 /* Manual 50Hz select */
#define COM13_UVSAT 0x40 /* UV saturation auto adjustment */
#define COM15_R01FE 0x80 /* 01 to FE */
#define MTX1 0x4f /* Matrix Coefficient 1 */
#define MTX2 0x50 /* Matrix Coefficient 2 */
#define MTX3 0x51 /* Matrix Coefficient 3 */
#define MTX4 0x52 /* Matrix Coefficient 4 */
#define MTX5 0x53 /* Matrix Coefficient 5 */
#define MTX6 0x54 /* Matrix Coefficient 6 */
#define MTXS 0x58 /* Matrix Coefficient Sign */
#define AWBC7 0x59 /* AWB Control 7 */
#define AWBC8 0x5a /* AWB Control 8 */
#define AWBC9 0x5b /* AWB Control 9 */
#define AWBC10 0x5c /* AWB Control 10 */
#define AWBC11 0x5d /* AWB Control 11 */
#define AWBC12 0x5e /* AWB Control 12 */
#define REG_GFI 0x69 /* Fix gain control */
#define GGAIN 0x6a /* G Channel AWB Gain */
#define DBLV 0x6b
#define AWBCTR3 0x6c /* AWB Control 3 */
#define AWBCTR2 0x6d /* AWB Control 2 */
#define AWBCTR1 0x6e /* AWB Control 1 */
#define AWBCTR0 0x6f /* AWB Control 0 */
eagler8
发表于 2019-8-4 14:56:00
/*
【Arduino】66种传感器模块系列实验（80）
实验八十： OV7670摄像头模块30W采集拍照模组（替OV7725）
在github.com上的最新OV7670库文件之二
OV7670.c
*/
#define F_CPU 16000000UL
#include <stdint.h>
#include <avr/io.h>
#include <util/twi.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#include "ov7670.h"
static const struct regval_list vga_ov7670[] PROGMEM = {
{REG_HREF,0xF6}, // was B6
{0x17,0x13}, // HSTART
{0x18,0x01}, // HSTOP
{0x19,0x02}, // VSTART
{0x1a,0x7a}, // VSTOP
{REG_VREF,0x0a}, // VREF
{0xff, 0xff}, /* END MARKER */
};
static const struct regval_list qvga_ov7670[] PROGMEM = {
{REG_COM14, 0x19},
{0x72, 0x11},
{0x73, 0xf1},
{REG_HSTART,0x16},
{REG_HSTOP,0x04},
{REG_HREF,0x24},
{REG_VSTART,0x02},
{REG_VSTOP,0x7a},
{REG_VREF,0x0a},
{0xff, 0xff}, /* END MARKER */
};
static const struct regval_list qqvga_ov7670[] PROGMEM = {
{REG_COM14, 0x1a}, // divide by 4
{0x72, 0x22}, // downsample by 4
{0x73, 0xf2}, // divide by 4
{REG_HSTART,0x16},
{REG_HSTOP,0x04},
{REG_HREF,0xa4},
{REG_VSTART,0x02},
{REG_VSTOP,0x7a},
{REG_VREF,0x0a},
{0xff, 0xff}, /* END MARKER */
};
static const struct regval_list yuv422_ov7670[] PROGMEM = {
{REG_COM7, 0x0}, /* Selects YUV mode */
{REG_RGB444, 0}, /* No RGB444 please */
{REG_COM1, 0},
{REG_COM15, COM15_R00FF},
{REG_COM9, 0x6A}, /* 128x gain ceiling; 0x8 is reserved bit */
{0x4f, 0x80}, /* "matrix coefficient 1" */
{0x50, 0x80}, /* "matrix coefficient 2" */
{0x51, 0}, /* vb */
{0x52, 0x22}, /* "matrix coefficient 4" */
{0x53, 0x5e}, /* "matrix coefficient 5" */
{0x54, 0x80}, /* "matrix coefficient 6" */
{REG_COM13,/*COM13_GAMMA|*/COM13_UVSAT},
{0xff, 0xff}, /* END MARKER */
};
static const struct regval_list rgb565_ov7670[] PROGMEM = {
{REG_COM7, COM7_RGB}, /* Selects RGB mode */
{REG_RGB444, 0}, /* No RGB444 please */
{REG_COM1, 0x0},
{REG_COM15, COM15_RGB565|COM15_R00FF},
{REG_COM9, 0x6A}, /* 128x 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}, /* END MARKER */
};
static const struct regval_list bayerRGB_ov7670[] PROGMEM = {
{REG_COM7, COM7_BAYER},
{REG_COM13, 0x08}, /* No gamma, magic rsvd bit */
{REG_COM16, 0x3d}, /* Edge enhancement, denoise */
{REG_REG76, 0xe1}, /* Pix correction, magic rsvd */
{0xff, 0xff}, /* END MARKER */
};
static const struct regval_list ov7670_default_regs[] PROGMEM = {//from the linux driver
{REG_COM7, COM7_RESET},
{REG_TSLB, 0x04}, /* OV */
{REG_COM7, 0}, /* VGA */
/*
* 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}, {0x71, 0x35},
{0x72, 0x11}, {0x73, 0xf0},
{0xa2,/* 0x02 changed to 1*/1},{REG_COM10, COM10_VS_NEG},
/* 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},
{REG_GAIN, 0}, {REG_AECH, 0},
{REG_COM4, 0x40}, /* magic reserved bit */
{REG_COM9, 0x18}, /* 4x gain + magic rsvd bit */
{REG_BD50MAX, 0x05}, {REG_BD60MAX, 0x07},
{REG_AEW, 0x95}, {REG_AEB, 0x33},
{REG_VPT, 0xe3}, {REG_HAECC1, 0x78},
{REG_HAECC2, 0x68}, {0xa1, 0x03}, /* magic */
{REG_HAECC3, 0xd8}, {REG_HAECC4, 0xd8},
{REG_HAECC5, 0xf0}, {REG_HAECC6, 0x90},
{REG_HAECC7, 0x94},
{REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_AGC|COM8_AEC},
{0x30,0},{0x31,0},//disable some delays
/* Almost all of these are magic "reserved" values. */
{REG_COM5, 0x61}, {REG_COM6, 0x4b},
{0x16, 0x02}, {REG_MVFP, 0x07},
{0x21, 0x02}, {0x22, 0x91},
{0x29, 0x07}, {0x33, 0x0b},
{0x35, 0x0b}, {0x37, 0x1d},
{0x38, 0x71}, {0x39, 0x2a},
{REG_COM12, 0x78}, {0x4d, 0x40},
{0x4e, 0x20}, {REG_GFIX, 0},
/*{0x6b, 0x4a},*/ {0x74,0x10},
{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, 0x9e}, /* it was 0x9F "9e for advance AWB" */
{0x6a, 0x40}, {REG_BLUE, 0x40},
{REG_RED, 0x60},
{REG_COM8, COM8_FASTAEC|COM8_AECSTEP|COM8_AGC|COM8_AEC|COM8_AWB},
/* Matrix coefficients */
{0x4f, 0x80}, {0x50, 0x80},
{0x51, 0}, {0x52, 0x22},
{0x53, 0x5e}, {0x54, 0x80},
{0x58, 0x9e},
{REG_COM16, COM16_AWBGAIN}, {REG_EDGE, 0},
{0x75, 0x05}, {REG_REG76, 0xe1},
{0x4c, 0}, {0x77, 0x01},
{REG_COM13, /*0xc3*/0x48}, {0x4b, 0x09},
{0xc9, 0x60}, /*{REG_COM16, 0x38},*/
{0x56, 0x40},
{0x34, 0x11}, {REG_COM11, COM11_EXP|COM11_HZAUTO},
{0xa4, 0x82/*Was 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},
{0xff, 0xff}, /* END MARKER */
};
static void errorLed(void){
DDRB|=32;//make sure led is output
while(1){//wait for reset
PORTB^=32;// toggle led
_delay_ms(100);
}
}
static void twiStart(void){
TWCR=_BV(TWINT)| _BV(TWSTA)| _BV(TWEN);//send start
while(!(TWCR & (1<<TWINT)));//wait for start to be transmitted
if((TWSR & 0xF8)!=TW_START)
errorLed();
}
static void twiWriteByte(uint8_t DATA,uint8_t type){
TWDR = DATA;
TWCR = _BV(TWINT) | _BV(TWEN); /* clear interrupt to start transmission */
while (!(TWCR & (1<<TWINT))); /* wait for transmission */
if ((TWSR & 0xF8) != type)
errorLed();
}
void wrReg(uint8_t reg,uint8_t dat){
//send start condition
twiStart();
twiWriteByte(OV7670_I2C_ADDRESS<<1,TW_MT_SLA_ACK);
twiWriteByte(reg,TW_MT_DATA_ACK);
twiWriteByte(dat,TW_MT_DATA_ACK);
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO);//send stop
_delay_ms(1);
}
static uint8_t twiRd(uint8_t nack){
if (nack){
TWCR=_BV(TWINT) | _BV(TWEN);
while ((TWCR & _BV(TWINT)) == 0); /* wait for transmission */
if ((TWSR & 0xF8) != TW_MR_DATA_NACK)
errorLed();
}else{
TWCR=_BV(TWINT) | _BV(TWEN) | _BV(TWEA);
while ((TWCR & _BV(TWINT)) == 0) ; /* wait for transmission */
if ((TWSR & 0xF8) != TW_MR_DATA_ACK)
errorLed();
}
return TWDR;
}
uint8_t rdReg(uint8_t reg){
uint8_t dat;
twiStart();
twiWriteByte(OV7670_I2C_ADDRESS<<1,TW_MT_SLA_ACK);
twiWriteByte(reg,TW_MT_DATA_ACK);
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO);//send stop
_delay_ms(1);
twiStart();
twiWriteByte((OV7670_I2C_ADDRESS<<1)|1,TW_MR_SLA_ACK);
dat=twiRd(1);
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO);//send stop
_delay_ms(1);
return dat;
}
static void wrSensorRegs8_8(const struct regval_list reglist[]){
const struct regval_list *next = reglist;
for(;;){
uint8_t reg_addr = pgm_read_byte(&next->reg_num);
uint8_t reg_val = pgm_read_byte(&next->value);
if((reg_addr==255)&&(reg_val==255))
break;
wrReg(reg_addr, reg_val);
next++;
}
}
void setColorSpace(enum COLORSPACE color){
switch(color){
case YUV422:
wrSensorRegs8_8(yuv422_ov7670);
break;
case RGB565:
wrSensorRegs8_8(rgb565_ov7670);
{uint8_t temp=rdReg(0x11);
_delay_ms(1);
wrReg(0x11,temp);}//according to the Linux kernel driver rgb565 PCLK needs rewriting
break;
case BAYER_RGB:
wrSensorRegs8_8(bayerRGB_ov7670);
break;
}
}
void setRes(enum RESOLUTION res){
switch(res){
case VGA:
wrReg(REG_COM3,0); // REG_COM3
wrSensorRegs8_8(vga_ov7670);
break;
case QVGA:
wrReg(REG_COM3,4); // REG_COM3 enable scaling
wrSensorRegs8_8(qvga_ov7670);
break;
case QQVGA:
wrReg(REG_COM3,4); // REG_COM3 enable scaling
wrSensorRegs8_8(qqvga_ov7670);
break;
}
}
void camInit(void){
wrReg(0x12, 0x80);//Reset the camera.
_delay_ms(100);
wrSensorRegs8_8(ov7670_default_regs);
wrReg(REG_COM10,32);//PCLK does not toggle on HBLANK.
}