OV7725 CMOS图像传感器 STM32驱动程序源代码.rar

/* ******************************************************************************* * INCLUDE ******************************************************************************* */ #include "ov7725.h" /* ******************************************************************************* * CONSTANTS ******************************************************************************* */ #define OV7725_REG_NUM 72 /* ******************************************************************************* * LOCAL VARIABLES ******************************************************************************* */ const unsigned char OV7725DefaultCfg[OV7725_REG_NUM][2] = { {0x32, 0x00},/*Image Start and Size Control*/ {0x2a, 0x00},/*Dummy Pixel Insert MSb*/ {0x11, 0x01},/*Internal Clock*/ {0x12, 0x46},/*Commom Control 7 - QVGA, RGB565, RGB*/ {0x12, 0x46},/*Commom Control 7 - QVGA, RGB565, RGB*/ {0x42, 0x7f},/*BLC Blue Channel Target Value*/ {0x4d, 0x00},/*Analog Fix Gain Amplifier*///0x09 {0x63, 0xf0},/*AWB Control Byte 0*/ {0x64, 0xff},/*DSP Control Byte 1*/ {0x65, 0x20},/*DSP Control Byte 2*/ {0x66, 0x00},/*DSP Control Byte 3*/ {0x67, 0x00},/*DSP Control Byte 4*/ {0x69, 0x5d},/*AWB Control Byte 1*/ {0x13, 0xff},/*Common Control 8 - AEC, AWB, AGC, AEC below banding Value, Banding Filter, AEC Step size limit Enable */ {0x0d, 0x61},/*Commom Control 4 - PLLx4, 1/4Window*/ {0x0f, 0xc5},/*Commom Control 6 - Auto Window setting ON*/ {0x14, 0x11},/*Commom Control 9 - Moximum AGC Value*/ {0x22, 0xFF},/*Banding Filter Minimum AEC Value*///7f {0x23, 0x01},/*Banding Filter Maximum Step*/ {0x24, 0x34},/**/ {0x25, 0x3c}, {0x26, 0xa1}, {0x2b, 0x00}, {0x6b, 0xaa}, {0x13, 0xff}, {0x90, 0x0a}, {0x91, 0x01}, {0x92, 0x01}, {0x93, 0x01}, {0x94, 0x5f}, {0x95, 0x53}, {0x96, 0x11}, {0x97, 0x1a}, {0x98, 0x3d}, {0x99, 0x5a}, {0x9a, 0x1e}, {0x9b, 0x00},//set luma {0x9c, 0x25},//set contrast {0xa7, 0x65},//set saturation {0xa8, 0x65},//set saturation {0xa9, 0x80},//set hue {0xaa, 0x80},//set hue {0x9e, 0x81}, {0xa6, 0x06}, {0x7e, 0x0c}, {0x7f, 0x16}, {0x80, 0x2a}, {0x81, 0x4e}, {0x82, 0x61}, {0x83, 0x6f}, {0x84, 0x7b}, {0x85, 0x86}, {0x86, 0x8e}, {0x87, 0x97}, {0x88, 0xa4}, {0x89, 0xaf}, {0x8a, 0xc5}, {0x8b, 0xd7}, {0x8c, 0xe8}, {0x8d, 0x20}, {0x33, 0x00}, {0x22, 0x99}, {0x23, 0x03}, {0x4a, 0x00}, {0x49, 0x13}, {0x47, 0x08}, {0x4b, 0x14}, {0x4c, 0x17}, {0x46, 0x05}, {0x0e, 0xf5}, {0x0c, 0xd0}, }; /* ******************************************************************************* * FUNCTIONS ******************************************************************************* */ /******************************************************************************* * @fn OV7725_Init * * @brief OV7725初始化，对其进行默认配置 * * @params 无 * * @return 1-成功、0-失败 */ unsigned char OV7725_Init(void) { unsigned char a; OV7725_CPU_IO_INIT(); OV7725_XCLK_ENABLE(); OV7725_SCCB_INIT(); /*复位SCCB相关寄存器*/ if ( 0 == OV7725_SCCBWrite(0x12, 0x80) ) return 0; for (a = 0; a < OV7725_REG_NUM; a++) { if ( 0 == OV7725_SCCBWrite(OV7725DefaultCfg[a][0], OV7725DefaultCfg[a][1]) ) { return 0; } } return 1; } /******************************************************************************* * @fn OV7725_Open * * @brief 开启OV7725图像转换输出 * * @params 无 * * @return 无 */ void OV7725_Open(void) { OV7725_CPU_IO_INT_ENABLE(); OV7725_XCLK_ENABLE(); } /******************************************************************************* * @fn OV7725_Close * * @brief 关闭OV7725图像转换输出 * * @params 无 * * @return 无 */ void OV7725_Close(void) { OV7725_CPU_IO_INT_DISABLE(); OV7725_XCLK_DISABLE(); } /******************************************************************************* * @fn OV7725_SCCBWrite * * @brief 通过SCCB总线向OV7725寄存器写入数据 * * @params reg - 寄存器地址 * data - 写入的数据 - 1Byte * * @return 1-成功、0-失败 */ unsigned char OV7725_SCCBWrite(unsigned char reg, unsigned char data) { OV7725_SCCB_START(); if ( 0 == OV7725_SCCB_WRITEBYTE(0x42) ) { OV7725_SCCB_STOP(); return 0; } OV7725_WAIT_US(100); if ( 0 == OV7725_SCCB_WRITEBYTE(reg) ) { OV7725_SCCB_STOP(); return 0; } OV7725_WAIT_US(100); if ( 0 == OV7725_SCCB_WRITEBYTE(data) ) { OV7725_SCCB_STOP(); return 0; } OV7725_SCCB_STOP(); return 1; } /******************************************************************************* * @fn OV7725_SCCBRead * * @brief 通过SCCB总线从OV7725寄存器读取数据 * * @params reg - 寄存器地址 * * @return 读取的数据 */ unsigned char OV7725_SCCBRead(unsigned char reg, unsigned char *data) { OV7725_SCCB_START(); if ( 0 == OV7725_SCCB_WRITEBYTE(0x42) ) { OV7725_SCCB_STOP(); return 0; } OV7725_WAIT_US(100); if ( 0 == OV7725_SCCB_WRITEBYTE(reg) ) { OV7725_SCCB_STOP(); return 0; } OV7725_SCCB_STOP(); OV7725_WAIT_US(100); OV7725_SCCB_START(); if ( 0 == OV7725_SCCB_WRITEBYTE(0x43) ) { OV7725_SCCB_STOP(); return 0; } OV7725_WAIT_US(100); *data = OV7725_SCCB_READBYTE(); OV7725_SCCB_ACK(); OV7725_SCCB_STOP(); return 1; }