OV7740 之STM32 源代码

/*Includes------------------------------------------------------------------*/

#include"stm32f10x.h"

#include"stm32f10x_exti.h"

#include"OV7740.h"

#include"OV7740Reg.h"

#include"sccb.h"

#include"misc.h"

#include"delay.h"

/*Privatedefine------------------------------------------------------------*/

#defineOV7740_HREF_BITGPIO_Pin_2

#defineOV7740_VSYNC_BITGPIO_Pin_4

#defineGPIO_PIN_PCLKGPIO_Pin_1

#defineGPIO_PIN_RESTGPIO_Pin_5

#defineGPIO_PIN_XCLKGPIO_Pin_8

#defineGPIO_PCLK_PORTGPIOB

#defineGPIO_VSYNC_CMOSGPIOB

#defineRCC_APB2Periph_GPIO_VSYNC_CMOSRCC_APB2Periph_GPIOB

#defineGPIO_PIN_VSYNC_CMOSGPIO_Pin_4//GPIO_Pin_4

#defineEXTI_LINE_VSYNC_CMOSEXTI_Line4//EXTI_Line4

#defineGPIO_PORT_SOURCE_VSYNC_CMOSGPIO_PortSourceGPIOB

#defineGPIO_PIN_SOURCE_VSYNC_CMOSGPIO_PinSource4//GPIO_PinSource14

#defineHREF_HGPIOB->BSRR=GPIO_Pin_2//

#defineHREF_LGPIOB->BRR=GPIO_Pin_2//

#defineXCLK_HGPIOA->BSRR=GPIO_Pin_8

#defineXCLK_LGPIOA->BRR=GPIO_Pin_8

#defineCAMRST_HGPIOB->BSRR=GPIO_Pin_5

#defineCAMRST_LGPIOB->BRR=GPIO_Pin_5

/*Privatevariables---------------------------------------------------------*/

/*Privatefunctions---------------------------------------------------------*/

voidOV7740_XCLK_ON(void)

{

GPIO_InitTypeDefGPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8;

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;

GPIO_Init(GPIOA,&GPIO_InitStructure);

RCC_MCOConfig(RCC_MCO_HSE);//hsi//指定引脚上输出时钟源PA8

}

voidOV7740_GPIO_Init(void)

{

GPIO_InitTypeDefGPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin=OV7740_VSYNC_BIT;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_Init(GPIOB,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin=OV7740_HREF_BIT|GPIO_PIN_REST;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;

GPIO_Init(GPIOB,&GPIO_InitStructure);

}

voidOV7740_Interrupts_Config(void)

{

NVIC_InitTypeDefNVIC_InitStructure;

NVIC_InitStructure.NVIC_IRQChannel=EXTI4_IRQn;

NVIC_InitStructure.NVIC_IRQChannelSubPriority=3;//从优先级

NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;

NVIC_Init(&NVIC_InitStructure);

}

voidOV7740_EXTI_Config(void)//

{

EXTI_InitTypeDefEXTI_InitStructure;

GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource4);

EXTI_InitStructure.EXTI_Line=EXTI_Line4;

EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;

EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Rising;

EXTI_InitStructure.EXTI_LineCmd=ENABLE;

EXTI_Init(&EXTI_InitStructure);

EXTI_GenerateSWInterrupt(EXTI_Line4);

}

u8OV7740_writeReg(u8regID,u8regDat)

{

while(SCCB_Start()==0);

if(0==SCCB_writeByte(SCCB_7740_WRADDR))

{

SCCB_Stop();

return(0);

}

if(0==SCCB_writeByte(regID))

{

SCCB_Stop();

return(0);

}

if(0==SCCB_writeByte(regDat))

{

SCCB_Stop();

return(0);

}

SCCB_Stop();

return(1);

}

u8OV7740_readReg(u8regID,u8*regDat)

{

//通过写操作设置寄存器地址

while(SCCB_Start()==0);

if(0==SCCB_writeByte(SCCB_7740_WRADDR))

{

SCCB_Stop();

return(0);

}

if(0==SCCB_writeByte(regID))

{

SCCB_Stop();

return(0);

}

SCCB_Stop();

//设置寄存器地址后，才是读

while(SCCB_Start()==0);

if(0==SCCB_writeByte(SCCB_7740_RDADDR))

{

SCCB_Stop();

return(0);

}

*regDat=SCCB_readByte();

SCCB_Stop();

return(1);

}

u8OV7740_init(void)

{

inti,n;

u8val;

SCCB_GPIO_Init();

OV7740_GPIO_Init();

OV7740_XCLK_ON();

CAMRST_L;

delay_us(100);

CAMRST_H;

delay_us(100);

if(0==OV7740_writeReg(SCCB_REG12,0x80))return0;

Delay_ms(10);

if(0==OV7740_writeReg(SCCB_REG12,0x51))return0;

delay_us(10);

OV7740_readReg(0x0A,&val);

n=sizeof(RegConf0)/sizeof(UINT8);

for(i=0;i

{

if(0==OV7740_writeReg(RegConf0[i][0],RegConf0[i][1]))

{

return0;

}

delay_us(10);

}

OV7740_setExposure(15);

OV7740_setGainVal(0);

OV7740_setVWindow(230);

OV7740_Interrupts_Config();

OV7740_EXTI_Config();

return1;

}

voidOV7740_setGainVal(intx)

{

//OV7740_readReg(0x15,&val);

OV7740_writeReg(0x00,Testgain[x][0]);

OV7740_writeReg(0x15,Testgain[x][1]);

}

voidOV7740_setExposure(intexposure)

{

OV7740_writeReg(0x10,exposure&0xff);

OV7740_writeReg(0x0f,(exposure>>8)&0xff);

}

u8setGain(intmacro,intmicro)

{

u8getGain[8]={7,0,1,3,7,15,31,63};

u8r00,r15;

/*if(macro==0){OV7740_writeReg(0x13,0x87);return0;}*/

if(macro>7)return0;

if(micro>15)return0;

r15=getGain[macro]>>4;

r00=(getGain[macro]<<4)+micro;

/*OV7740_writeReg(0x13,0x00);手动修改*/

OV7740_writeReg(0x00,r00);

if(r15)OV7740_writeReg(0x15,r15);

return1;

}

//evenforstartline

voidOV7740_setVWindow(intstartline)

{

OV7740_writeReg(0x19,startline>>1);

OV7740_writeReg(0x1a,(20>>1));//20lines,>>1

}

voidOV7740_setLines(intlines)

{

OV7740_writeReg(0x1a,(lines>>1));//20lines,>>1

}

u8OV7740_test(void)

{

SCCB_GPIO_Init();

OV7740_GPIO_Init();

OV7740_XCLK_ON();

CAMRST_L;

delay_us(100);

CAMRST_H;

delay_us(100);

if(0==OV7740_writeReg(0x12,0x80))return0;

delay_us(10);

if(0==OV7740_writeReg(0x12,0x40))return0;

delay_us(10);

OV7740_setVWindow(230);

if(0==OV7740_writeReg(SCCB_REG38,0x07))return0;

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