Search found 90 matches

by HermannSW
Thu Jul 18, 2019 12:27 pm
Forum: ESP32 Arduino
Topic: ESP32 CAM direct access to image data
Replies: 11
Views: 4253

Re: ESP32 CAM direct access to image data

But I cannot find the code for dl_matrix3du_alloc anywhere and whilst the calling context makes clear that parameters 2 & 3 are width & height I do not know what parms 1 & 4 are. From: https://github.com/espressif/esp-face/blob/master/lib/include/dl_lib_matrix3d.h#L68 ... /* * @brief Allocate a 3D ...
by HermannSW
Thu Jul 18, 2019 5:47 am
Forum: ESP32 Arduino
Topic: Using Timer Interrupt and Reload Timer
Replies: 1
Views: 473

Re: Using Timer Interrupt and Reload Timer

I think "timerRestart()" is what you want.
But you need this fix to get it working correctly:
https://github.com/espressif/arduino-es ... -507039927
by HermannSW
Wed Jul 17, 2019 8:40 pm
Forum: ESP32 Arduino
Topic: ESP32-Cam and SD Card
Replies: 10
Views: 3002

Re: ESP32-Cam and SD Card

Interesting, please test with another ESP32-CAM module, according camera_pins.h GPIO12 and GPIO16 are not used:

Code: Select all

$ grep 37 camera_pins.h 
#define Y8_GPIO_NUM      37
$ grep 16 camera_pins.h 
$ grep 12 camera_pins.h 
$ 
by HermannSW
Wed Jul 17, 2019 7:34 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 32
Views: 6885

Re: ESP32-CAM ov2640 exposure control/FREX mode

I looked into many (preliminary) ov2640 datasheets on the web, and all show this same SVGA Frame Timing diagram, which is inconsistent: https://stamm-wilbrandt.de/en/forum/ov2640.svga.timing.png Diagram says that t_LINE is 1190 t_p, and summing up all components gives 866416 t_p. But 672×t_LINE is 7...
by HermannSW
Wed Jul 17, 2019 6:47 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 32
Views: 6885

Re: ESP32-CAM ov2640 exposure control/FREX mode

I think I made a good capture, and a good observation as well. This was the global shutter setup, 2 shots, 50µs flashes, 950µs apart. And offset 170ms: ...,"flash":0,"ges":2,"ges_gpio":0,"ges_repeat":2,"ges_vsync":0,"ges_offset":170,"ges_on":50,"ges_off":950} The observation I made is, that when pre...
by HermannSW
Wed Jul 17, 2019 2:36 pm
Forum: ESP32 Arduino
Topic: Esp32 CAM sending image buffer over TCP
Replies: 2
Views: 1017

Re: Esp32 CAM sending image buffer over TCP

The Serial prints are useful with Serial monitor timestamps: 16:16:08.410 -> Camera capture send before 16:16:08.444 -> Camera capture send after 16:16:08.444 -> JPG: 22291B 174ms 16:16:09.973 -> Camera capture send before 16:16:10.007 -> Camera capture send after 16:16:10.007 -> JPG: 21786B 127ms P...
by HermannSW
Wed Jul 17, 2019 1:28 pm
Forum: ESP32 Arduino
Topic: Esp32 CAM sending image buffer over TCP
Replies: 2
Views: 1017

Re: Esp32 CAM sending image buffer over TCP

CameraWebServer app_httpd.cpp does send the whole framebuffer. Add serial monitor output like below and enable output of timestamps in console. Then you can measure what speed that method of framebuffer transfer does: Serial.println("Camera capture send before"); res = httpd_resp_send(req, (const ch...
by HermannSW
Tue Jul 16, 2019 9:40 pm
Forum: ESP32 Arduino
Topic: ESP32-Cam and SD Card
Replies: 10
Views: 3002

Re: ESP32-Cam and SD Card

I don't know where to find official ESP32-CAM SD card pinout. I found this: https://raw.githubusercontent.com/v12345vtm/timelapse-ESP32-CAM/master/README.md ESP32-CAM board uses the SD card to the following pins: SD Card | ESP32 |esp32-cam D2 - - D3 SS gpio13 CMD MOSI gpio15 VSS GND gnd VDD 3.3V 3.3...
by HermannSW
Tue Jul 16, 2019 5:49 pm
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 32
Views: 6885

Re: ESP32-CAM ov2640 exposure control/FREX mode

Now that even daylight global shutter captures are possible, I wanted to add "frequency" feature allowing to specify frequency [Hz] and On [µs] and get permanent flashes of the specified length with the given frequency. Just having started I thought that this can be done with "shots" option without ...
by HermannSW
Tue Jul 16, 2019 10:28 am
Forum: ESP32 Arduino
Topic: ESP32-CAM ov2640 exposure control/FREX mode
Replies: 32
Views: 6885

Re: ESP32-CAM ov2640 exposure control/FREX mode

Current state of ov2640 global shutter experiments is, that soldering cable to ESP32-CAM flat ribbon cable connector was not necessary. In addition, ov2640 sensor allows for: some kind of "implicit" global shutter mode global shutter capturing at daylight without external shutter mixed mode global+r...

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