OV7670 FIFO 30W摄像头介绍（三） --- STM32F103驱动OV7670代码介绍
2024-06-01 17:42:57
在介绍OV7670之前先附上模块链接：点击购买OV7670摄像头模块
介绍代码前，首先来看之前写的文章：
OV7670 FIFO 30W摄像头介绍（一） — 整体介绍/SCCB时序
OV7670 FIFO 30W摄像头介绍（二） — 寄存器图示说明
1）寄存器介绍
typedef enum
{ov7670_reg_gain = 0x00,ov7670_reg_blue = 0x01,ov7670_reg_red = 0x02,ov7670_reg_vref = 0x03,ov7670_reg_com1 = 0x04,ov7670_reg_bave = 0x05,ov7670_reg_gbave=0x06,ov7670_reg_aechh=0x07,ov7670_reg_rave = 0x08,ov7670_reg_com2 = 0x09,ov7670_reg_pid = 0x0a,ov7670_reg_ver = 0x0b,ov7670_reg_com3 = 0x0c,ov7670_reg_com4 = 0x0d,ov7670_reg_com5 = 0x0e,ov7670_reg_com6 = 0x0f,ov7670_reg_aech = 0x10,ov7670_reg_clkrc = 0x11,ov7670_reg_com7 = 0x12,ov7670_reg_com8 = 0x13,ov7670_reg_com9 = 0x14,ov7670_reg_com10=0x15,ov7670_reg_rsvd1 = 0x16,ov7670_reg_hstart= 0x17,ov7670_reg_hstop = 0x18,ov7670_reg_vstart= 0x19,ov7670_reg_vstop = 0x1a,ov7670_reg_pshft = 0x1b,ov7670_reg_midh = 0x1c,ov7670_reg_midl = 0x1d,ov7670_reg_mvfp = 0x1e,ov7670_reg_laec = 0x1f,ov7670_reg_adctl0= 0x20,ov7670_reg_adctl1= 0x21,ov7670_reg_adctl2= 0x22,ov7670_reg_adctl3= 0x23,ov7670_reg_aew = 0x24,ov7670_reg_aeb = 0x25,ov7670_reg_vpt = 0x26,ov7670_reg_bbias = 0x27,ov7670_reg_gbbias=0x28,ov7670_reg_rsvd2 = 0x29,ov7670_reg_exhch= 0x2a,ov7670_reg_exhcl = 0x2b,ov7670_reg_rbias = 0x2c,ov7670_reg_advfl = 0x2d,ov7670_reg_advfh = 0x2e,ov7670_reg_yave = 0x2f,ov7670_reg_hsyst = 0x30,ov7670_reg_hsyen= 0x31,ov7670_reg_href = 0x32,ov7670_reg_chlf = 0x33,ov7670_reg_arblm = 0x34,ov7670_reg_rsvd3 = 0x35,ov7670_reg_rsvd4 = 0x36,ov7670_reg_adc = 0x37,ov7670_reg_acom = 0x38,ov7670_reg_ofon = 0x39,ov7670_reg_tslb = 0x3a,ov7670_reg_com11=0x3b,ov7670_reg_com12=0x3c,ov7670_reg_com13=0x3d,ov7670_reg_com14=0x3e,ov7670_reg_edge = 0x3f,ov7670_reg_com15=0x40,ov7670_reg_com16=0x41,ov7670_reg_com17=0x42,ov7670_reg_awbc1=0x43,ov7670_reg_awbc2=0x44,ov7670_reg_awbc3=0x45,ov7670_reg_awbc4=0x46,ov7670_reg_awbc5=0x47,ov7670_reg_awbc6=0x48,ov7670_reg_rsvd5 = 0x49,ov7670_reg_rsvd6 = 0x4a,ov7670_reg_rgb4b= 0x4b,ov7670_reg_dnsth = 0x4c,ov7670_reg_rsvd7 = 0x4d,ov7670_reg_rsvd8 = 0x4e,ov7670_reg_mtx1 = 0x4f,ov7670_reg_mtx2 = 0x50,ov7670_reg_mtx3 = 0x51,ov7670_reg_mtx4 = 0x52,ov7670_reg_mtx5 = 0x53,ov7670_reg_mtx6 = 0x54,ov7670_reg_bright= 0x55,ov7670_reg_contras=0x56,ov7670_reg_contras_center=0x57,ov7670_reg_mtxs = 0x58,ov7670_reg_rsvd9 = 0x59,ov7670_reg_rsd10= 0x5a,ov7670_reg_rsd11= 0x5b,ov7670_reg_rsd12 = 0x5c,ov7670_reg_rsd13 = 0x5d,ov7670_reg_rsd14 = 0x5e,ov7670_reg_rsd15 = 0x5f,ov7670_reg_rsd16 = 0x60,ov7670_reg_rsd17 = 0x61,ov7670_reg_lcc1 = 0x62,ov7670_reg_lcc2 = 0x63,ov7670_reg_lcc3 = 0x64,ov7670_reg_lcc4 = 0x65,ov7670_reg_lcc5 = 0x66,ov7670_reg_manu = 0x67,ov7670_reg_manv = 0x68,ov7670_reg_gfix = 0x69,ov7670_reg_ggain = 0x6a,ov7670_reg_dblv = 0x6b,ov7670_reg_awbctr3=0x6c,ov7670_reg_awbctr2=0x6d,ov7670_reg_awbctr1=0x6e,ov7670_reg_awbctr0=0x6f,ov7670_reg_scaling_xsc=0x70,ov7670_reg_scaling_ysc=0x71,ov7670_reg_scaling_dcwctr=0x72,ov7670_reg_scaling_pclkdiv=0x73,ov7670_reg_74 = 0x74,ov7670_reg_75 = 0x75,ov7670_reg_76 = 0x76,ov7670_reg_77 = 0x77,ov7670_reg_rsd18 = 0x78,ov7670_reg_rsd19 = 0x79,ov7670_reg_slop = 0x7a,ov7670_reg_cam1 = 0x7b,ov7670_reg_cam2 = 0x7c,ov7670_reg_cam3 = 0x7d,ov7670_reg_cam4 = 0x7e,ov7670_reg_cam5 = 0x7f,ov7670_reg_cam6 = 0x80,ov7670_reg_cam7 = 0x81,ov7670_reg_cam8 = 0x82,ov7670_reg_cam9 = 0x83,ov7670_reg_cam10=0x84,ov7670_reg_cam11=0x85,ov7670_reg_cam12=0x86,ov7670_reg_cam13=0x87,ov7670_reg_cam14=0x88,ov7670_reg_cam15=0x89,ov7670_reg_rsd20 = 0x8a,ov7670_reg_rsd21 = 0x8b,ov7670_reg_rgb444=0x8c,ov7670_reg_rsd22= 0x8d,ov7670_reg_rsd23 = 0x8e,ov7670_reg_rsd24 = 0x8f,ov7670_reg_rsd25 = 0x90,ov7670_reg_rsd26 = 0x91,ov7670_reg_dmlnl = 0x92,ov7670_reg_dmlnh= 0x93,ov7670_reg_lcc6 = 0x94,ov7670_reg_lcc7 = 0x95,ov7670_reg_bd50st=0x9d,ov7670_reg_bd60st=0x9e,ov7670_reg_haecc1=0x9f,ov7670_reg_haecc2=0xa0,ov7670_reg_scaling_pclk_dly=0xa2,ov7670_reg_nt_ctl = 0xa4,ov7670_reg_bd50max=0xa5,ov7670_reg_haecc3=0xa6,ov7670_reg_haecc4=0xa7,ov7670_reg_haecc5=0xa8,ov7670_reg_haecc6=0xa9,ov7670_reg_haecc7=0xaa,ov7670_reg_bd60max=0xab,ov7670_reg_stropt=0xac,ov7670_reg_str_r = 0xad,ov7670_reg_str_g = 0xae,ov7670_reg_str_b = 0xaf,ov7670_reg_ablc1= 0xb1,ov7670_reg_thl_st= 0xb3,ov7670_reg_thl_dlt=0xb5,ov7670_reg_adchb= 0xbe,ov7670_reg_adchr = 0xbf,ov7670_reg_adchgb= 0xc0,ov7670_reg_adchgr=0xc1,ov7670_reg_satctl = 0xc9,
}ov7670_reg_index_e; 2）函数定义
uint8_t hw_ov7670_init(void);
uint8_t hw_ov7670_control(uint8_t control);
uint8_t hw_ov7670_set_light_mode(uint8_t mode);
uint8_t hw_ov7670_set_color_saturation(uint8_t sat);
uint8_t hw_ov7670_set_brightness(uint8_t bright);
uint8_t hw_ov7670_set_contrast(uint8_t contrast);
uint8_t hw_ov7670_set_special_effect(uint8_t eft);
uint8_t hw_ov7670_set_window(uint16_t sx,uint16_t sy,uint16_t width,uint16_t height);
uint8_t hw_ov7670_is_start(void);
void hw_ov7670_get_data_send(void);
3）初始化
/******************************************************************************* func name : hw_ov7670_init* para : NULL* return : ov7670 init result* description : ov7670 init
******************************************************************************/
uint8_t hw_ov7670_init()
{uint16_t i=0;uint8_t pid_msb,pid_lsb;uint8_t vid_h,vid_l;GPIO_InitTypeDef GPIO_InitStructure;EXTI_InitTypeDef EXTI_InitStructure;NVIC_InitTypeDef NVIC_InitStructure;/* Enable ov7670 clock */RCC_APB2PeriphClockCmd(OV7670_FIFO_WEN_PERIPH_CLK |OV7670_FIFO_RCLK_PERIPH_CLK |OV7670_FIFO_RRST_PERIPH_CLK |OV7670_FIFO_OE_PERIPH_CLK |OV7670_FIFO_WRST_PERIPH_CLK |OV7670_VSYNC_PERIPH_CLK |OV7670_DATA_PERIPH_CLK | RCC_APB2Periph_AFIO,ENABLE);/* GPIO init */GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;GPIO_InitStructure.GPIO_Pin=OV7670_VSYNC;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(OV7670_VSYNC_GPIO,&GPIO_InitStructure);GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Pin=OV7670_FIFO_WEN;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(OV7670_FIFO_WEN_GPIO,&GPIO_InitStructure);GPIO_SetBits(OV7670_FIFO_WEN_GPIO,OV7670_FIFO_WEN);GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Pin=OV7670_FIFO_RCLK;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(OV7670_FIFO_RCLK_GPIO,&GPIO_InitStructure);GPIO_SetBits(OV7670_FIFO_RCLK_GPIO,OV7670_FIFO_RCLK);GPIO_InitStructure.GPIO_Pin = OV7670_FIFO_RRST;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_Init(OV7670_FIFO_RRST_GPIO, &GPIO_InitStructure);GPIO_SetBits(OV7670_FIFO_RRST_GPIO,OV7670_FIFO_RRST);GPIO_InitStructure.GPIO_Pin = OV7670_FIFO_OE;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_Init(OV7670_FIFO_OE_GPIO, &GPIO_InitStructure);GPIO_SetBits(OV7670_FIFO_OE_GPIO,OV7670_FIFO_OE);GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Pin=OV7670_FIFO_WRST;GPIO_Init(OV7670_FIFO_WRST_GPIO, &GPIO_InitStructure);GPIO_SetBits(OV7670_FIFO_WRST_GPIO,OV7670_FIFO_WRST);GPIO_InitStructure.GPIO_Pin = OV7670_D0 | OV7670_D1 | OV7670_D2 | OV7670_D3 |OV7670_D4 | OV7670_D5 | OV7670_D6 | OV7670_D7;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;GPIO_Init(OV7670_DATA_GPIO, &GPIO_InitStructure);GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);protocol_sccb_init();if(protocol_sccb_write_reg(ov7670_reg_com7,0x80))return HW_ERR_OV7670_SCCB_ERR;hw_delay_us(500);vid_h = protocol_sccb_read_reg(ov7670_reg_midh);vid_l = protocol_sccb_read_reg(ov7670_reg_midl);pid_msb = protocol_sccb_read_reg(ov7670_reg_pid);pid_lsb = protocol_sccb_read_reg(ov7670_reg_ver);HW_DEBUG("PIDM 0x%02x PIDL 0x%02x,VIDH 0x%02x VIDL 0x%02x\n",pid_msb,pid_lsb,vid_h,vid_l);for(i=0; i<sizeof(ov7670_init_reg_tbl_new)/sizeof(ov7670_init_reg_tbl_new[0]); i++){protocol_sccb_write_reg(ov7670_init_reg_tbl_new[i][0],ov7670_init_reg_tbl_new[i][1]);}GPIO_EXTILineConfig(OV7670_EXIT_GPIO,OV7670_EXIT_PIN);EXTI_InitStructure.EXTI_Line=OV7670_EXIT_LINE;EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;EXTI_InitStructure.EXTI_LineCmd = ENABLE;EXTI_Init(&EXTI_InitStructure);NVIC_InitStructure.NVIC_IRQChannel = OV7670_EXIT_IRQ;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority =OV7670_PREE_PRIO;NVIC_InitStructure.NVIC_IRQChannelSubPriority = OV7670_SUB_PRIO;NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_Init(&NVIC_InitStructure);hw_ov7670_set_window(0,0,320,240);hw_ov7670_control(ov7670_ctl_start);return HW_ERR_OK;
}4）设置亮度模式
/******************************************************************************* func name : hw_ov7670_set_light_mode* para : modeov7670_light_auto --> set auto modeov7670_light_sunny --> set sunny modeov7670_light_cloudy --> set cloudy modeov7670_light_office --> set office modeov7670_light_home --> set home mode* return : ov7670 hw_ov7670_set_light_mode result* description : set ov7670 light mode
******************************************************************************/
uint8_t hw_ov7670_set_light_mode(uint8_t mode)
{uint8_t reg13val=0xE7;uint8_t reg01val=0;uint8_t reg02val=0;switch(mode){case ov7670_light_sunny:reg13val=0xE5;reg01val=0x5A;reg02val=0x5C;break;case ov7670_light_cloudy:reg13val=0xE5;reg01val=0x58;reg02val=0x60;break;case ov7670_light_office:reg13val=0xE5;reg01val=0x84;reg02val=0x4c;break;case ov7670_light_home:reg13val=0xE5;reg01val=0x96;reg02val=0x40;break;}protocol_sccb_write_reg(ov7670_reg_com8,reg13val);protocol_sccb_write_reg(ov7670_reg_blue,reg01val);protocol_sccb_write_reg(ov7670_reg_red,reg02val);return HW_ERR_OK;
}5）设置色彩饱和度
/******************************************************************************* func name : hw_ov7670_set_color_saturation* para : sat0 --> -21 --> -12 --> 03 --> 14 --> 2* return : ov7670 hw_ov7670_set_color_saturation result* description : set ov7670 color saturation
******************************************************************************/
uint8_t hw_ov7670_set_color_saturation(uint8_t sat)
{uint8_t reg4f5054val=0x80;uint8_t reg52val=0x22;uint8_t reg53val=0x5E;switch(sat){case 0:reg4f5054val=0x40;reg52val=0x11;reg53val=0x2F;break;case 1:reg4f5054val=0x66;reg52val=0x1B;reg53val=0x4B;break;case 3:reg4f5054val=0x99;reg52val=0x28;reg53val=0x71;break;case 4:reg4f5054val=0xC0;reg52val=0x33;reg53val=0x8D;break;}protocol_sccb_write_reg(ov7670_reg_mtx1,reg4f5054val); //色彩矩阵系数1protocol_sccb_write_reg(ov7670_reg_mtx2,reg4f5054val); //色彩矩阵系数2protocol_sccb_write_reg(ov7670_reg_mtx3,0x00); //色彩矩阵系数3protocol_sccb_write_reg(ov7670_reg_mtx4,reg52val); //色彩矩阵系数4protocol_sccb_write_reg(ov7670_reg_mtx5,reg53val); //色彩矩阵系数5protocol_sccb_write_reg(ov7670_reg_mtx6,reg4f5054val); //色彩矩阵系数6protocol_sccb_write_reg(ov7670_reg_mtxs,0x9E); //MTXSreturn HW_ERR_OK;
}6）设置亮度
/******************************************************************************* func name : hw_ov7670_set_brightness* para : bright0 --> -21 --> -12 --> 03 --> 14 --> 2* return : ov7670 hw_ov7670_set_brightness result* description : set ov7670 brightness
******************************************************************************/
uint8_t hw_ov7670_set_brightness(uint8_t bright)
{uint8_t reg55val=0x00;switch(bright){case 0:reg55val=0xB0;break;case 1:reg55val=0x98;break;case 3:reg55val=0x18;break;case 4:reg55val=0x30;break;}protocol_sccb_write_reg(ov7670_reg_bright,reg55val); //亮度调节return HW_ERR_OK;
}7）设置对比度
/******************************************************************************* func name : hw_ov7670_set_contrast* para : bright0 --> -21 --> -12 --> 03 --> 14 --> 2* return : ov7670 hw_ov7670_set_contrast result* description : set ov7670 contrast
******************************************************************************/
uint8_t hw_ov7670_set_contrast(uint8_t contrast)
{uint8_t reg56val=0x40;switch(contrast){case 0:reg56val=0x30;break;case 1:reg56val=0x38;break;case 3:reg56val=0x50;break;case 4:reg56val=0x60;break;}protocol_sccb_write_reg(ov7670_reg_contras,reg56val); //对比度调节return HW_ERR_OK;
}8）设置特殊效果
/******************************************************************************* func name : hw_ov7670_set_special_effect* para : bright0 --> 普通模式1 --> 负片2 --> 黑白3 --> 偏红色4 --> 偏绿色5 --> 偏蓝色6 --> 复古* return : ov7670 hw_ov7670_set_special_effect result* description : set ov7670 special effect
******************************************************************************/
uint8_t hw_ov7670_set_special_effect(uint8_t eft)
{uint8_t reg3aval=0X04;uint8_t reg67val=0XC0;uint8_t reg68val=0X80;switch(eft){case 1:reg3aval=0X24;reg67val=0X80;reg68val=0X80;break;case 2:reg3aval=0X14;reg67val=0X80;reg68val=0X80;break;case 3:reg3aval=0X14;reg67val=0Xc0;reg68val=0X80;break;case 4:reg3aval=0X14;reg67val=0X40;reg68val=0X40;break;case 5:reg3aval=0X14;reg67val=0X80;reg68val=0XC0;break;case 6:reg3aval=0X14;reg67val=0XA0;reg68val=0X40;break;}protocol_sccb_write_reg(ov7670_reg_tslb,reg3aval);protocol_sccb_write_reg(ov7670_reg_manv,reg67val);protocol_sccb_write_reg(ov7670_reg_manu,reg68val);return HW_ERR_OK;
}9）中断处理
void OV7670_EXIT_FUNC(void)
{if(EXTI_GetITStatus(OV7670_EXIT_LINE)==SET){OV7670_WRST_L;OV7670_WRST_H;OV7670_WEN_H;ov7670_frame_interrupt++;}EXTI_ClearITPendingBit(OV7670_EXIT_LINE);
}
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