有关ov7670的图像采集至sd卡的问题，求大神粗线……

Script36 · 发表于 2012-10-13 00:16:52

用mini版做ov7670的图像采集至sd卡的实验，但是用下面的程序总是采集不够数据……求指导：
#include <stm32f10x_lib.h>
#include "sys.h"
#include "gpio.h"
#include "usart.h"
#include "delay.h"
#include "led.h"
#include "lcd.h"
#include "fifo.h"
#include "OV7670.h"
#include "my_camera.h"

u16 a,data;
extern u8 status;
u16 i,j;
u8 res;
FATFS fatfs;
UINT WRBytes;
FIL fileW;
u16 Line_buf[240];
void WriteHeader(FIL* file)
{
UINT WRBytes;
u8 BMP_header[14];
BITMAPFILEHEADER* bmph;

bmph=(BITMAPFILEHEADER*)BMP_header;
bmph->bfType=0x4d42;
bmph->bfSize=0x25836;//文件大小,待定
bmph->bfReserved1=0;//保留,必须设置为0
bmph->bfReserved2=0;
bmph->bfOffBits=54;//从文件头到位图数据所需偏移字节
f_write(file,BMP_header,14,&WRBytes);
}

void WriteBMPInfo(FIL* file)
{
UINT WRBytes;
u8 BMP_info[40];
BITMAPINFOHEADER* bmpi;

bmpi=(BITMAPINFOHEADER*)BMP_info;
bmpi->biSize=40;
bmpi->biWidth=240;
bmpi->biHeight=320;
bmpi->biPlanes=1;
bmpi->biBitCount=16;
bmpi->biCompression=0;
bmpi->biSizeImage=0;
bmpi->biXPelsPerMeter=0;
bmpi->biYPelsPerMeter=0;
bmpi->biClrUsed=0;
bmpi->biClrImportant=0;
f_write(file,BMP_info,40,&WRBytes);
}

int main(void)
{

Stm32_Clock_Init(9);//系统时钟初始化
Delay_Init(72);//延时初始化
usart_init(72,9600);//串口1初始化
LED_Init();
JTAG_Set(JTAG_SWD_DISABLE);
FIFO_GPIO_Init();

FIFO_OE_CLR;//FIFO数据允许读出
FIFO_WE_SET;//允许写入FIFO
while(OV7670_Init()); //初始化OV7670

FIFO_RRST_CLR;
FIFO_RCK_CLR;
FIFO_RCK_SET;
FIFO_RCK_CLR;
FIFO_RRST_SET;
FIFO_RCK_SET;

status=0;

while(1)
{
if(status==2)
{

   res=f_mount(0, &fatfs);
   while(res)printf("SD mount failed!\n");
   res=f_open(&fileW,"0:/output/ph1.bmp",FA_OPEN_ALWAYS|FA_WRITE);//创建并打开
   while(res)printf("file create failed!\n");

   WriteHeader(&fileW);
   WriteBMPInfo(&fileW);
   led0=0;
    FIFO_RRST_CLR; //读复位
   FIFO_RCK_CLR;
   FIFO_RCK_SET;
   FIFO_RCK_CLR;
   FIFO_RRST_SET;
   FIFO_RCK_SET;

  for(j=0;j<9600;j++)
  {
//1
    FIFO_RCK_CLR;
    data=GPIOB->IDR &0x00ff;
    FIFO_RCK_SET;
    data<<=8;
    FIFO_RCK_CLR;
    data|=GPIOB->IDR&0x00ff;
    FIFO_RCK_SET;
    f_write(&fileW,(u8*)RGB565toRGB555(data),2,&WRBytes);
//2
    FIFO_RCK_CLR;
    data=GPIOB->IDR &0x00ff;
    FIFO_RCK_SET;
    data<<=8;
    FIFO_RCK_CLR;
    data|=GPIOB->IDR&0x00ff;
    FIFO_RCK_SET;
    f_write(&fileW,(u8*)RGB565toRGB555(data),2,&WRBytes);
//3
    FIFO_RCK_CLR;
    data=GPIOB->IDR &0x00ff;
    FIFO_RCK_SET;
    data<<=8;
    FIFO_RCK_CLR;
    data|=GPIOB->IDR&0x00ff;
    FIFO_RCK_SET;
    f_write(&fileW,(u8*)RGB565toRGB555(data),2,&WRBytes);
//4
    FIFO_RCK_CLR;
    data=GPIOB->IDR &0x00ff;
    FIFO_RCK_SET;
    data<<=8;
    FIFO_RCK_CLR;
    data|=GPIOB->IDR&0x00ff;
    FIFO_RCK_SET;
    f_write(&fileW,(u8*)RGB565toRGB555(data),2,&WRBytes);
//5
    FIFO_RCK_CLR;
    data=GPIOB->IDR &0x00ff;
    FIFO_RCK_SET;
    data<<=8;
    FIFO_RCK_CLR;
    data|=GPIOB->IDR&0x00ff;
    FIFO_RCK_SET;
    f_write(&fileW,(u8*)RGB565toRGB555(data),2,&WRBytes);
//6
    FIFO_RCK_CLR;
    data=GPIOB->IDR &0x00ff;
    FIFO_RCK_SET;
    data<<=8;
    FIFO_RCK_CLR;
    data|=GPIOB->IDR&0x00ff;
    FIFO_RCK_SET;
    f_write(&fileW,(u8*)RGB565toRGB555(data),2,&WRBytes);
//7
    FIFO_RCK_CLR;
    data=GPIOB->IDR &0x00ff;
    FIFO_RCK_SET;
    data<<=8;
    FIFO_RCK_CLR;
    data|=GPIOB->IDR&0x00ff;
    FIFO_RCK_SET;
    f_write(&fileW,(u8*)RGB565toRGB555(data),2,&WRBytes);
//8
    FIFO_RCK_CLR;
    data=GPIOB->IDR &0x00ff;
    FIFO_RCK_SET;
    data<<=8;
    FIFO_RCK_CLR;
    data|=GPIOB->IDR&0x00ff;
    FIFO_RCK_SET;
    f_write(&fileW,(u8*)RGB565toRGB555(data),2,&WRBytes);

  }