89 lines
2.9 KiB
Arduino
89 lines
2.9 KiB
Arduino
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// camera_init.ino — minimum reproducer for "OV2640 emulation needed".
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//
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// Runs through the full upstream esp32-camera init dance and prints
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// either the chip ID + a single-frame size or a clear error code.
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//
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// Today, under Velxio, this sketch hangs at esp_camera_init() because
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// the SCCB I²C probe never gets an ack from a (non-existent) sensor.
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// When the shim from autosearch/04_proposed_architecture.md ships,
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// this sketch should print "got frame: N bytes" within ~5 s of boot.
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//
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// Pinout below matches the AI-Thinker ESP32-CAM, the variant Velxio
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// renders. Don't change pin numbers — Layer-2 of the test suite checks
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// that this sketch matches the board the simulator presents.
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#include "esp_camera.h"
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#define PWDN_GPIO_NUM 32
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#define RESET_GPIO_NUM -1
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#define XCLK_GPIO_NUM 0
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#define SIOD_GPIO_NUM 26
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#define SIOC_GPIO_NUM 27
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#define Y9_GPIO_NUM 35
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#define Y8_GPIO_NUM 34
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#define Y7_GPIO_NUM 39
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#define Y6_GPIO_NUM 36
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#define Y5_GPIO_NUM 21
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#define Y4_GPIO_NUM 19
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#define Y3_GPIO_NUM 18
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#define Y2_GPIO_NUM 5
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#define VSYNC_GPIO_NUM 25
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#define HREF_GPIO_NUM 23
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#define PCLK_GPIO_NUM 22
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void setup() {
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Serial.begin(115200);
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delay(1000);
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Serial.println("velxio-esp32-cam-test boot");
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camera_config_t cfg = {};
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cfg.ledc_channel = LEDC_CHANNEL_0;
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cfg.ledc_timer = LEDC_TIMER_0;
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cfg.pin_d0 = Y2_GPIO_NUM;
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cfg.pin_d1 = Y3_GPIO_NUM;
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cfg.pin_d2 = Y4_GPIO_NUM;
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cfg.pin_d3 = Y5_GPIO_NUM;
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cfg.pin_d4 = Y6_GPIO_NUM;
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cfg.pin_d5 = Y7_GPIO_NUM;
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cfg.pin_d6 = Y8_GPIO_NUM;
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cfg.pin_d7 = Y9_GPIO_NUM;
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cfg.pin_xclk = XCLK_GPIO_NUM;
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cfg.pin_pclk = PCLK_GPIO_NUM;
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cfg.pin_vsync = VSYNC_GPIO_NUM;
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cfg.pin_href = HREF_GPIO_NUM;
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cfg.pin_sccb_sda = SIOD_GPIO_NUM;
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cfg.pin_sccb_scl = SIOC_GPIO_NUM;
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cfg.pin_pwdn = PWDN_GPIO_NUM;
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cfg.pin_reset = RESET_GPIO_NUM;
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cfg.xclk_freq_hz = 20000000;
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cfg.pixel_format = PIXFORMAT_JPEG;
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cfg.frame_size = FRAMESIZE_QVGA; // 320x240 — keeps WS bandwidth low
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cfg.jpeg_quality = 12;
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cfg.fb_count = 1;
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// Default fb_location is CAMERA_FB_IN_PSRAM, which fails under QEMU
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// because we don't emulate the AI-Thinker board's external PSRAM.
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// DRAM has enough contiguous DMA-capable memory for QVGA JPEG (~30 KB).
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cfg.fb_location = CAMERA_FB_IN_DRAM;
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esp_err_t err = esp_camera_init(&cfg);
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if (err != ESP_OK) {
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Serial.printf("camera_init failed: 0x%x\n", err);
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return;
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}
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Serial.println("camera_init ok");
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}
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void loop() {
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camera_fb_t* fb = esp_camera_fb_get();
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if (!fb) {
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Serial.println("fb_get returned NULL");
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delay(500);
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return;
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}
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Serial.printf("got frame: %u bytes %ux%u fmt=%d\n",
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(unsigned)fb->len, (unsigned)fb->width,
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(unsigned)fb->height, (int)fb->format);
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esp_camera_fb_return(fb);
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delay(500);
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}
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