提交 9608a0b3 编写于 作者: C Carsten Gregersen

Initital commit

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#
# This is a project Makefile. It is assumed the directory this Makefile resides in is a
# project subdirectory.
#
PROJECT_NAME := esp32_nabto
include $(IDF_PATH)/make/project.mk
# uNabto ESP32 cam demo
This project turns the ESP32-CAM into a remote P2P accesible surveillance camera.
It uses the esp-idf FreeRTOS based core (vs. some other demos which uses the arduino core).
Also it uses the espressif esp32-cam library with slight modification (we could not get the reset to work).
The video is MJPEG and the module can cope to remotely stream (encode to mjpeg and encrypt and integrity check) a VGA feed at around 10 frames per second.
# The structure
The structure of the project is as follows
<pre>
+
+-->+-------------+
| | Main | This folder contains the initial setup
| +-------------+ and the application_event() function defining
| the application
+-->+-------------+
| Components |
+-------------+
|
+------->+----------------+
| | unabto | Don't edit here (link to other github rep)
| +----------------+
|
+------->+----------------+
| | unabto-esp-idf | The platform integration
| +----------------+
|
+------->+----------------+
| | nabtotunnel | Nabto tunnel application
| +----------------+
|
+------->+----------------+
| | unabto-esp- | Client fingerprint database
| | fingerprint | storage in NVS
| +----------------+
|
+------->+----------------+
| esp32-camera | From the espressif github (not a link, since we adjusted)
+----------------+
</pre>
ESP-IDF project has a speciel structure. You can read more about that here:
https://esp-idf.readthedocs.io/en/v1.0/build_system.html
The unabto source and the integration code is done as components and therefore resides in the IDF component folder.
The unabto sdk is a submodule link to the unabto generic source.
The initial setup/commisioning and the application is located in the main folder.
unabto_application.c contains the application (inside the application_event function), the main.c contains the setup and configuration of the WiFi module.
# How to set it up
## Step 1: Setup the ESP-IDF build environment
Follow the setup of the ESP-IDF toolchain setup
http://esp-idf.readthedocs.io/en/latest/get-started/index.html
## Step 2: Clone the repository
```
git clone --recursive https://github.com/nabto/unabto-esp32.git
```
## Step 3: Make menuconfig
Enter into menu "Custom configuration"
Edit/adjust the following menu items:
* WIFI access point name (SSID) : The wifi access point you want the module to attach to
* WIFI password : The password used by the access point
* Nabto ID : The Nabto device id you get from your AppMyProduct account
* Nabto key - 32 hex chars : The key for the specific device id you entered in the before mentioned item
## Step 3: Build the project
```
make
```
## Step 4: Flash the Image
Possible you need to adjust the serial deivce to use for flashing which is setup in the menuconfig part, but mostly the standard setup will match your platform.
```
make flash
```
# How to test the application
## Monitor the output from the board
Using the monitor command you should see a printout similar to the following every time the ESP32-EVB starts up:
```
```
## Download the AMP video app
Download the Android or iPhone app from app store
https://play.google.com/store/apps/details?id=com.appmyproduct.video
https://itunes.apple.com/lc/app/appmyproduct-video-client/id1276975254
## Pair the video app with the wifi module
## Connect and view video
set(COMPONENT_SRCS
driver/camera.c
driver/sccb.c
driver/sensor.c
driver/twi.c
driver/xclk.c
sensors/ov2640.c
sensors/ov3660.c
sensors/ov7725.c
conversions/yuv.c
conversions/to_jpg.cpp
conversions/to_bmp.c
conversions/jpge.cpp
conversions/esp_jpg_decode.c
)
set(COMPONENT_ADD_INCLUDEDIRS
driver/include
conversions/include
)
set(COMPONENT_PRIV_INCLUDEDIRS
driver/private_include
sensors/private_include
conversions/private_include
)
set(COMPONENT_REQUIRES driver)
set(COMPONENT_PRIV_REQUIRES freertos)
register_component()
menu "Camera configuration"
config OV2640_SUPPORT
bool "OV2640 Support"
default y
help
Enable this option if you want to use the OV2640.
Disable this option to safe memory.
config OV7725_SUPPORT
bool "OV7725 Support"
default n
help
Enable this option if you want to use the OV7725.
Disable this option to safe memory.
config OV3660_SUPPORT
bool "OV3660 Support"
default y
help
Enable this option if you want to use the OV3360.
Disable this option to safe memory.
config SCCB_HARDWARE_I2C
bool "Use hardware I2C1 for SCCB"
default y
help
Enable this option if you want to use hardware I2C to control the camera.
Disable this option to use software I2C.
choice CAMERA_TASK_PINNED_TO_CORE
bool "Camera task pinned to core"
default CAMERA_CORE0
help
Pin the camera handle task to a certain core(0/1). It can also be done automatically choosing NO_AFFINITY.
config CAMERA_CORE0
bool "CORE0"
config CAMERA_CORE1
bool "CORE1"
config CAMERA_NO_AFFINITY
bool "NO_AFFINITY"
endchoice
endmenu
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# ESP32 Camera Driver
## General Information
This repository hosts ESP32 compatible driver for OV2640 and OV3660 image sensors. Additionally it provides a few tools, which allow converting the captured frame data to the more common BMP and JPEG formats.
## Important to Remember
- Except when using CIF or lower resolution with JPEG, the driver requires PSRAM to be installed and activated.
- Using YUV or RGB puts a lot of strain on the chip because writing to PSRAM is not particularly fast. The result is that image data might be missing. This is particularly true if WiFi is enabled. If you need RGB data, it is recommended that JPEG is captured and then turned into RGB using `fmt2rgb888` or `fmt2bmp`/`frame2bmp`.
- When 1 frame buffer is used, the driver will wait for the current frame to finish (VSYNC) and start I2S DMA. After the frame is acquired, I2S will be stopped and the frame buffer returned to the application. This approach gives more control over the system, but results in longer time to get the frame.
- When 2 or more frame bufers are used, I2S is running in continuous mode and each frame is pushed to a queue that the application can access. This approach puts more strain on the CPU/Memory, but allows for double the frame rate. Please use only with JPEG.
## Installation Instructions
- Clone or download and extract the repository to the components folder of your ESP-IDF project
- Enable PSRAM in `menuconfig`
- Include `esp_camera.h` in your code
## Examples
### Initialization
```c
#include "esp_camera.h"
//WROVER-KIT PIN Map
#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
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_UXGA,//QQVGA-QXGA 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
};
esp_err_t camera_init(){
//power up the camera if PWDN pin is defined
if(CAM_PIN_PWDN != -1){
pinMode(CAM_PIN_PWDN, OUTPUT);
digitalWrite(CAM_PIN_PWDN, LOW);
}
//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;
}
esp_err_t camera_capture(){
//acquire a frame
camera_fb_t * fb = esp_camera_fb_get();
if (!fb) {
ESP_LOGE(TAG, "Camera Capture Failed");
return ESP_FAIL;
}
//replace this with your own function
process_image(fb->width, fb->height, fb->format, fb->buf, fb->len);
//return the frame buffer back to the driver for reuse
esp_camera_fb_return(fb);
return ESP_OK;
}
```
### JPEG HTTP Capture
```c
#include "esp_camera.h"
#include "esp_http_server.h"
#include "esp_timer.h"
typedef struct {
httpd_req_t *req;
size_t len;
} jpg_chunking_t;
static size_t jpg_encode_stream(void * arg, size_t index, const void* data, size_t len){
jpg_chunking_t *j = (jpg_chunking_t *)arg;
if(!index){
j->len = 0;
}
if(httpd_resp_send_chunk(j->req, (const char *)data, len) != ESP_OK){
return 0;
}
j->len += len;
return len;
}
esp_err_t jpg_httpd_handler(httpd_req_t *req){
camera_fb_t * fb = NULL;
esp_err_t res = ESP_OK;
size_t fb_len = 0;
int64_t fr_start = esp_timer_get_time();
fb = esp_camera_fb_get();
if (!fb) {
ESP_LOGE(TAG, "Camera capture failed");
httpd_resp_send_500(req);
return ESP_FAIL;
}
res = httpd_resp_set_type(req, "image/jpeg");
if(res == ESP_OK){
res = httpd_resp_set_hdr(req, "Content-Disposition", "inline; filename=capture.jpg");
}
if(res == ESP_OK){
if(fb->format == PIXFORMAT_JPEG){
fb_len = fb->len;
res = httpd_resp_send(req, (const char *)fb->buf, fb->len);
} else {
jpg_chunking_t jchunk = {req, 0};
res = frame2jpg_cb(fb, 80, jpg_encode_stream, &jchunk)?ESP_OK:ESP_FAIL;
httpd_resp_send_chunk(req, NULL, 0);
fb_len = jchunk.len;
}
}
esp_camera_fb_return(fb);
int64_t fr_end = esp_timer_get_time();
ESP_LOGI(TAG, "JPG: %uKB %ums", (uint32_t)(fb_len/1024), (uint32_t)((fr_end - fr_start)/1000));
return res;
}
```
### JPEG HTTP Stream
```c
#include "esp_camera.h"
#include "esp_http_server.h"
#include "esp_timer.h"
#define PART_BOUNDARY "123456789000000000000987654321"
static const char* _STREAM_CONTENT_TYPE = "multipart/x-mixed-replace;boundary=" PART_BOUNDARY;
static const char* _STREAM_BOUNDARY = "\r\n--" PART_BOUNDARY "\r\n";
static const char* _STREAM_PART = "Content-Type: image/jpeg\r\nContent-Length: %u\r\n\r\n";
esp_err_t jpg_stream_httpd_handler(httpd_req_t *req){
camera_fb_t * fb = NULL;
esp_err_t res = ESP_OK;
size_t _jpg_buf_len;
uint8_t * _jpg_buf;
char * part_buf[64];
static int64_t last_frame = 0;
if(!last_frame) {
last_frame = esp_timer_get_time();
}
res = httpd_resp_set_type(req, _STREAM_CONTENT_TYPE);
if(res != ESP_OK){
return res;
}
while(true){
fb = esp_camera_fb_get();
if (!fb) {
ESP_LOGE(TAG, "Camera capture failed");
res = ESP_FAIL;
} else {
if(fb->format != PIXFORMAT_JPEG){
bool jpeg_converted = frame2jpg(fb, 80, &_jpg_buf, &_jpg_buf_len);
if(!jpeg_converted){
ESP_LOGE(TAG, "JPEG compression failed");
esp_camera_fb_return(fb);