我在适配一个新的CIS，这颗输出的格式是raw，大小为480*270，所以dma node size 为2880，图片fb_size为129600，程序将它计算为9次拷贝，一次的大小为14400，我在esp32-camera的基础上修改了很多内容，目前的问题是出在cam_hal中的cam_task，程序期待的是有9次IN_SUC_EOF中断，但是每次只收到8次，也就是在came_task中只拷贝了8次，所以得到的大小为115200（离正确的129600差14400），测量过sensor的波形，其pclk为6.4MHZ，一共有270个行同步信号，每个行同步信号内有480个pclk信号.
我使用的是esp32s3-eye，主程序如下：
`extern "C" void app_main()
{
#if CONFIG_CAMERA_MODULE_ESP_EYE || CONFIG_CAMERA_MODULE_ESP32_CAM_BOARD
/* IO13, IO14 is designed for JTAG by default,
* to use it as generalized input,
* firstly declair it as pullup input */
gpio_config_t conf;
conf.mode = GPIO_MODE_INPUT;
conf.pull_up_en = GPIO_PULLUP_ENABLE;
conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
conf.intr_type = GPIO_INTR_DISABLE;
conf.pin_bit_mask = 1LL << 13;
gpio_config(&conf);
conf.pin_bit_mask = 1LL << 14;
gpio_config(&conf);
#endif
camera_config_t config;
config.ledc_channel = LEDC_CHANNEL_0;
config.ledc_
timer = LEDC_TIMER_0;
config.pin_d0 = CAMERA_PIN_D0;
config.pin_d1 = CAMERA_PIN_D1;
config.pin_d2 = CAMERA_PIN_D2;
config.pin_d3 = CAMERA_PIN_D3;
config.pin_d4 = CAMERA_PIN_D4;
config.pin_d5 = CAMERA_PIN_D5;
config.pin_d6 = CAMERA_PIN_D6;
config.pin_d7 = CAMERA_PIN_D7;
config.pin_xclk = CAMERA_PIN_XCLK;
config.pin_pclk = CAMERA_PIN_PCLK;
config.pin_vsync = CAMERA_PIN_VSYNC;
config.pin_href = CAMERA_PIN_HREF;
config.pin_sscb_sda = CAMERA_PIN_SIOD;
config.pin_sscb_scl = CAMERA_PIN_SIOC;
config.pin_pwdn = CAMERA_PIN_PWDN;
config.pin_reset = CAMERA_PIN_RESET;
config.xclk_freq_hz = 24000000;
config.pixel_format = PIXFORMAT_GRAYSCALE;
config.frame_size = FRAMESIZE_480X270;
config.jpeg_quality = 12;
config.fb_count = 2;
config.fb_location = CAMERA_FB_IN_PSRAM;
config.grab_mode = CAMERA_GRAB_WHEN_EMPTY;
// camera init
esp_err_t err = esp_camera_init(&config);
if (err != ESP_OK)
{
ESP_LOGE(TAG, "Camera init failed with error 0x%x", err);
return;
}
vTaskDelay(2000 / portTICK_RATE_MS);
while (1)
{
ESP_LOGW(TAG, "Taking picture...");
camera_fb_t *pic = esp_camera_fb_get();
ESP_LOGW(TAG, "pic addr: %p ", pic->buf);
// use pic->buf to access the image
ESP_LOGW(TAG, "Picture taken! Its size was: %zu bytes", pic->len);
esp_camera_fb_return(pic);
// vTaskDelay(5000 / portTICK_RATE_MS);
}
}`
为了进一步调试，我修改了cam_hal中的buf_size检查，将尺寸不合规的frame的en也置为0，得到了如下输出：
I (00:00:09.711) cam_hal: FB-SIZE: 115200 != 129600
W (00:00:09.712) example:take_picture: pic addr: 0x3d8009c8
W (00:00:09.712) example:take_picture: Picture taken! Its size was: 115200 bytes
W (00:00:09.712) example:take_picture: Taking picture...
I (00:00:09.741) cam_hal: FB-SIZE: 115200 != 129600
W (00:00:09.741) example:take_picture: pic addr: 0x3d82040c
W (00:00:09.741) example:take_picture: Picture taken! Its size was: 115200 bytes
W (00:00:09.742) example:take_picture: Taking picture...
I (00:00:09.770) cam_hal: FB-SIZE: 115200 != 129600
W (00:00:09.770) example:take_picture: pic addr: 0x3d8009c8
W (00:00:09.771) example:take_picture: Picture taken! Its size was: 115200 bytes
W (00:00:09.771) example:take_picture: Taking picture...
I (00:00:09.799) cam_hal: FB-SIZE: 115200 != 129600
看起来像最后一个包的时候，程序还没来得及读到14400个字节，v信号就来了。实在想不出来问题出在哪。
当程序运行到这一行时的cam_obj:
` frame_buffer_event->len += ll_cam_memcpy(cam_obj,
&frame_buffer_event->buf[frame_buffer_event->len],
&cam_obj->dma_buffer[(cnt % cam_obj->dma_half_buffer_cnt) * cam_obj->dma_half_buffer_size],
cam_obj->dma_half_buffer_size);`
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