add an example

examples/take_picture.c

@@ -0,0 +1,150 @@
+/**
+ * This example takes a picture every 5s and print its size on serial monitor.
+ */
+
+// =============================== SETUP ======================================
+
+// 1. Board setup (Uncomment):
+// #define BOARD_WROVER_KIT
+// #define BOARD_ESP32CAM_AITHINKER
+
+/**
+ * 2. Kconfig setup
+ * 
+ * If you have a Kconfig file, copy the content from
+ *  https://github.com/espressif/esp32-camera/blob/master/Kconfig into it.
+ * In case you haven't, copy and paste this Kconfig file inside the src directory.
+ * This Kconfig file has definitions that allows more control over the camera and
+ * how it will be initialized.
+ */
+
+/**
+ * 3. Enable PSRAM on sdkconfig:
+ * 
+ * CONFIG_ESP32_SPIRAM_SUPPORT=y
+ * 
+ * More info on
+ * https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/kconfig.html#config-esp32-spiram-support
+ */
+
+// ================================ CODE ======================================
+
+#include <esp_event_loop.h>
+#include <esp_log.h>
+#include <esp_system.h>
+#include <nvs_flash.h>
+#include <sys/param.h>
+#include <string.h>
+
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+
+#include "esp_camera.h"
+
+// WROVER-KIT PIN Map
+#ifdef BOARD_WROVER_KIT
+
+#define CAM_PIN_PWDN -1  //power down is not used
+#define CAM_PIN_RESET -1 //software reset will be performed
+#define CAM_PIN_XCLK 21
+#define CAM_PIN_SIOD 26
+#define CAM_PIN_SIOC 27
+
+#define CAM_PIN_D7 35
+#define CAM_PIN_D6 34
+#define CAM_PIN_D5 39
+#define CAM_PIN_D4 36
+#define CAM_PIN_D3 19
+#define CAM_PIN_D2 18
+#define CAM_PIN_D1 5
+#define CAM_PIN_D0 4
+#define CAM_PIN_VSYNC 25
+#define CAM_PIN_HREF 23
+#define CAM_PIN_PCLK 22
+
+#endif
+
+// ESP32Cam (AiThinker) PIN Map
+#ifdef BOARD_ESP32CAM_AITHINKER
+
+#define CAM_PIN_PWDN 32
+#define CAM_PIN_RESET -1 //software reset will be performed
+#define CAM_PIN_XCLK 0
+#define CAM_PIN_SIOD 26
+#define CAM_PIN_SIOC 27
+
+#define CAM_PIN_D7 35
+#define CAM_PIN_D6 34
+#define CAM_PIN_D5 39
+#define CAM_PIN_D4 36
+#define CAM_PIN_D3 21
+#define CAM_PIN_D2 19
+#define CAM_PIN_D1 18
+#define CAM_PIN_D0 5
+#define CAM_PIN_VSYNC 25
+#define CAM_PIN_HREF 23
+#define CAM_PIN_PCLK 22
+
+#endif
+
+static const char *TAG = "example:take_picture";
+
+static camera_config_t camera_config = {
+    .pin_pwdn = CAM_PIN_PWDN,
+    .pin_reset = CAM_PIN_RESET,
+    .pin_xclk = CAM_PIN_XCLK,
+    .pin_sscb_sda = CAM_PIN_SIOD,
+    .pin_sscb_scl = CAM_PIN_SIOC,
+
+    .pin_d7 = CAM_PIN_D7,
+    .pin_d6 = CAM_PIN_D6,
+    .pin_d5 = CAM_PIN_D5,
+    .pin_d4 = CAM_PIN_D4,
+    .pin_d3 = CAM_PIN_D3,
+    .pin_d2 = CAM_PIN_D2,
+    .pin_d1 = CAM_PIN_D1,
+    .pin_d0 = CAM_PIN_D0,
+    .pin_vsync = CAM_PIN_VSYNC,
+    .pin_href = CAM_PIN_HREF,
+    .pin_pclk = CAM_PIN_PCLK,
+
+    //XCLK 20MHz or 10MHz for OV2640 double FPS (Experimental)
+    .xclk_freq_hz = 20000000,
+    .ledc_timer = LEDC_TIMER_0,
+    .ledc_channel = LEDC_CHANNEL_0,
+
+    .pixel_format = PIXFORMAT_JPEG, //YUV422,GRAYSCALE,RGB565,JPEG
+    .frame_size = FRAMESIZE_VGA,    //QQVGA-UXGA Do not use sizes above QVGA when not JPEG
+
+    .jpeg_quality = 12, //0-63 lower number means higher quality
+    .fb_count = 1       //if more than one, i2s runs in continuous mode. Use only with JPEG
+};
+
+static esp_err_t init_camera()
+{
+    //initialize the camera
+    esp_err_t err = esp_camera_init(&camera_config);
+    if (err != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Camera Init Failed");
+        return err;
+    }
+
+    return ESP_OK;
+}
+
+void app_main()
+{
+    init_camera();
+
+    while (1)
+    {
+        ESP_LOGI(TAG, "Taking picture...");
+        camera_fb_t *pic = esp_camera_fb_get();
+
+        // use pic->buf to access the image
+        ESP_LOGI(TAG, "Picture taken! Its size was: %zu bytes", pic->len);
+
+        vTaskDelay(5000 / portTICK_RATE_MS);
+    }
+}