art-pi使用ov2640出现write reg error

发布于 2021-07-27 23:45:28 浏览：1580 订阅该版

使用的是art-pi与media io板子，连接了ov2640摄像头
使用摄像头官方例程中的main.c

```c
#include <rtthread.h>
#include <rtdevice.h>
#include "drv_common.h"
#include "lcd_port.h"
#define LED_PIN GET_PIN(I, 8)

struct rt_event ov2640_event;
extern rt_uint8_t model_input_data_rgb[];
extern rt_uint8_t model_input_data_gray[];

int main(void)
{
    rt_pin_mode(LED_PIN, PIN_MODE_OUTPUT);
    /* init spi data notify event */
    rt_event_init(&ov2640_event, "ov2640", RT_IPC_FLAG_FIFO);
    struct drv_lcd_device *lcd;
    lcd = (struct drv_lcd_device *)rt_device_find("lcd");
    struct rt_device_rect_info rect_info = {0, 0, 320, 240};

while(1)
    {
        rt_event_recv(&ov2640_event,
                            1,
                            RT_EVENT_FLAG_AND | RT_EVENT_FLAG_CLEAR,
                            RT_WAITING_FOREVER,
                            RT_NULL);
        lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, &rect_info);//show 320*240 RGB image
        //lcd_show_image(0, 0, 96, 96, model_input_data_rgb);//show 96*96 RGB image
        DCMI_Start();
    }
    return RT_EOK;
}

#include "stm32h7xx.h"
static int vtor_config(void)
{
   /* Vector Table Relocation in Internal QSPI_FLASH */
   SCB->VTOR = QSPI_BASE;
   return 0;
}
INIT_BOARD_EXPORT(vtor_config);

```

出现ov2640 write reg error 错误，不知如何解决，求大神帮助解决一下。
![image.png](https://oss-club.rt-thread.org/uploads/20210727/52c62e31c47f38a48874aa2e0b622826.png)