基于stm32f103系列驅動攝像頭模組GC032A源程序

ID:660830 · 發表于 2019-12-11 09:59

本例程，是通過stm32中斷獲取攝像頭數據，只獲取了Y數據存于數組中，而且因為SRAM內存不夠只取部分數據顯示LCD屏，成像沒問題不過還是有點慢，效果是能看出來一幀一幀圖像刷，猜測有很大原因是攝像頭數據寫入LCD屏RAM速度慢，可能還有其他解決辦法吧，本人實力有限，那話不多說了，直接給代碼，這是主函數代碼

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include <stdio.h>
#include "delay.h"
#include "usart.h"
#include "GC2155.h"
#include "SCCB.h"
#include "stm32f10x_flash.h"
#include "lcd.h"
u8 display[62400]={0};
void EXTI15_10_IRQHandler(void) //VSYNC --- PG15
{
unsigned short i;
if(EXTI->PR & 0x08000)//發生了場中段
{
EXTI->PR |= 1<<15; //在該位寫1清清除PG15中斷
EXTI->IMR &= 0<<15; //屏蔽PG15中斷
for(i = 0;i < 1000;i++);
TimerCnt2=0;
//初始化DMA
EXTI->IMR |= 1<<14; //開行中斷
}
else
{
//啟動DMA傳輸，每個PCLK下降沿觸發DAM傳輸
if(EXTI->PR & 0x04000) //發生行中段
{
//while(!(GPIOG->IDR&0x0400)); //下降沿觸發數據獲取
for(i=0;i<480;i++)
{
if((i+1)%2)
{
display[TimerCnt2]=(GPIOC->IDR&0xff);
TimerCnt2++;
}
}
if(TimerCnt2>=62400) //判斷是否寫完，寫完則屏蔽中斷
{
EXTI->IMR &= 0<<14;
EXTI->IMR &= 0<<15; //屏蔽PG15中斷
}
EXTI->PR=1<<14; //清除行中段
}
}
}
int main(void)
{
u16 R,G,B,Y;
u16 i;
i=0;
delay_init();
uart_init(115200);
//TIM3_Int_Init(999,71);//1MHZ的計數頻率，計數到1000為1ms
LCD_Init();
LCD_WriteRAM_Prepare();
delay_ms(100);
while(1!=OV7670_init()) ;
OV7670_GPIO_CONTRL_CONFIG();
NVIC_Configuration();
while(1)
{
if(TimerCnt2==62400)
{
LCD_Clear(0xffff);
for(i=0;i<62400;i++)
{
Y=(display[i]&0xff);
Y<<=8;
R=Y&0xf800;
B=Y>>11;
Y>>=5;
G=Y&0x07e0;
LCD_WriteRAM(R+G+B);
}
i=0;
TimerCnt2=0;
EXTI->IMR |= 1<<15;
}
}
}