lab2-4_single_msg_queue_interrupt

part3_freertos/lab2-1_single_msg_queue/.gitignore

@@ -0,0 +1,10 @@
+
+# Configuration files
+sdkconfig
+sdkconfig.old
+
+# Production folder
+build/
+
+# HTML documentation
+html_doc/

part3_freertos/lab2-1_single_msg_queue/CMakeLists.txt

@@ -0,0 +1,6 @@
+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(main)

part3_freertos/lab2-1_single_msg_queue/Makefile

@@ -0,0 +1,3 @@
+PROJECT_NAME := main
+
+include $(IDF_PATH)/make/project.mk

part3_freertos/lab2-1_single_msg_queue/ftdi_ft2232.cfg

@@ -0,0 +1,22 @@
+interface ftdi
+ftdi_vid_pid 0x0403 0x6010
+ftdi_layout_init 0x0038 0x003b
+
+# The ESP32 only supports JTAG.
+transport select jtag
+
+# This can go as high as 20MHz if CPU frequency is 80MHz, or 26MHz
+# if CPU frequency is 160MHz or 240MHz.
+adapter_khz 20000
+
+# If single core debugging is required, uncomment the following line
+#set ESP32_ONLYCPU 1
+
+# To disable RTOS support, uncomment the following line
+# set ESP32_RTOS none
+
+# This option defaults to 3.3v
+set ESP32_FLASH_VOLTAGE 3.3
+
+# Source the ESP32 configuration file
+source [find target/esp32.cfg]

part3_freertos/lab2-1_single_msg_queue/main/CMakeLists.txt

@@ -0,0 +1,3 @@
+idf_component_register(
+            SRC_DIRS "." 
+            INCLUDE_DIRS ".")

part3_freertos/lab2-1_single_msg_queue/main/component.mk

@@ -0,0 +1,2 @@
+COMPONENT_SRCDIRS := .
+COMPONENT_ADD_INCLUDEDIRS := .

part3_freertos/lab2-1_single_msg_queue/main/main.c

@@ -0,0 +1,170 @@
+/****************************************************************************
+ * Copyright (C) 2020 by Fabrice Muller                                     *
+ *                                                                          *
+ * This file is useful for ESP32 Design course.                             *
+ *                                                                          *
+ ****************************************************************************/
+
+/**
+ * @file lab1-2_main.c
+ * @author Fabrice Muller
+ * @date 12 Oct. 2020
+ * @brief File containing the lab1-2 of Part 3.
+ *
+ * @see https://github.com/fmuller-pns/esp32-vscode-project-template
+ */
+ 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "esp_log.h"
+#include "soc/rtc_wdt.h"
+
+/* FreeRTOS.org includes. */
+#include "freertos/FreeRTOSConfig.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/semphr.h"
+#include "esp_freertos_hooks.h"
+
+#include "my_helper_fct.h"
+QueueHandle_t xQueue1;
+
+/**************************************/
+/**************************************/
+/* Scenarios                          */
+
+#define DIFF_PRIORITY
+
+#define PINNED_TO_CORE 0x00
+//   0x00: Task 1: Core 0, Task 2: Core 0
+//   0x01: Task 1: Core 0, Task 2: Core 1
+//   0x10: Task 1: Core 1, Task 2: Core 0
+//   0x11: Task 1: Core 1, Task 2: Core 1
+
+//#define IDLE_HOOKS
+
+//#define TASK_DELAY
+
+//#define PERIODIC_TASK_DELAY
+
+/**************************************/
+/**************************************/
+
+/* Default stack size for tasks */
+static const uint32_t STACK_SIZE = 4000;
+
+#ifdef DIFF_PRIORITY
+
+static const uint32_t T1_PRIO = 2;
+static const uint32_t T2_PRIO = 2;
+static const uint32_t T3_PRIO = 3;
+#else
+
+static const uint32_t T1_PRIO = 5;
+static const uint32_t T2_PRIO = 5;
+
+#endif
+
+#ifdef IDLE_HOOKS
+
+volatile uint32_t countIdle0 = 0;
+volatile uint32_t countIdle1 = 0;
+
+bool vApplicationIdleHook_0 ( void ){
+    countIdle0++;
+    return true;
+}
+
+bool vApplicationIdleHook_1 ( void ){
+    countIdle1++;
+    return true;
+}
+
+#ifndef PERIODIC_TASK_DELAY
+/* Buffer to extract trace information */
+static char buffer[40*12];
+#endif
+
+#endif
+
+/* Used as a loop counter to create a very crude delay. */
+#define mainDELAY_LOOP_COUNT        (0x1FFFFF)
+
+/* The task function. */
+void vTaskFunction1(void *pvParameters);
+void vTaskFunction2(void *pvParameters);
+void vTaskFunction3(void *pvParameters);
+
+
+void app_main(void) {
+
+    xQueue1 = xQueueCreate(5, sizeof(uint32_t));
+    DISPLAY("Start of app_main task, priority = %d",uxTaskPriorityGet(NULL));
+    vTaskSuspendAll();
+
+    xTaskCreatePinnedToCore(vTaskFunction1, "Task 1", STACK_SIZE,   (void*)"Task 1", T1_PRIO,   NULL,CORE_1);                  
+    xTaskCreatePinnedToCore(vTaskFunction2, "Task 2", STACK_SIZE, (void*)"Task 2", T2_PRIO, NULL,CORE_0);
+    xTaskCreatePinnedToCore(vTaskFunction3, "Task 3", STACK_SIZE, (void*)"Task 3", T3_PRIO, NULL,CORE_0);
+
+    xTaskResumeAll();
+
+    /*for (;;) {
+        vTaskDelay(100 / portTICK_PERIOD_MS);    // 100 ms
+        DISPLAY("Hello app_main task!");
+    }*/
+
+    /* to ensure its exit is clean */
+    vTaskDelete(NULL);  
+}
+/*-----------------------------------------------------------*/
+
+void vTaskFunction1(void *pvParameters) {
+    int32_t lSentValue;
+    TickType_t xLastWakeTime;
+	xLastWakeTime= xTaskGetTickCount();
+    const TickType_t xDelay500ms = pdMS_TO_TICKS(500UL);
+    for(;;){
+        DISPLAY("Task 1 started , sending message");
+        lSentValue= 50;
+        xQueueSend(xQueue1, &lSentValue, 0);
+        // Compute time : 40 ms
+        COMPUTE_IN_TIME_MS(40) ;
+        // block periodically : 500 ms
+        vTaskDelayUntil(&xLastWakeTime, xDelay500ms);
+        DISPLAY("Task 1 done");
+    }
+
+
+}
+
+void vTaskFunction2(void *pvParameters) {
+    // Wait for message
+    int32_t lReceivedValue;
+
+    for(;;){
+        DISPLAY("Task 2 started, wait for message");
+        if(xQueueReceive(xQueue1,&lReceivedValue,portMAX_DELAY==pdTRUE)){
+        // display task number and message
+        DISPLAY("Task 2 : Received value : %d", lReceivedValue);
+        }
+        // Compute time : 30 ms
+        COMPUTE_IN_TIME_MS(30) ;
+    }
+
+}
+
+void vTaskFunction3(void *pvParameters) {
+    for(;;){
+        // Task blocked during 100 ms
+        DISPLAY("Task 3 started");
+        vTaskDelay(pdMS_TO_TICKS(100));
+        // Compute time : 20 ms
+        COMPUTE_IN_TIME_MS(20);
+        DISPLAY ("Task 3 done");
+    }
+
+}
+
+

part3_freertos/lab2-1_single_msg_queue/main/my_helper_fct.h

@@ -0,0 +1,47 @@
+#ifndef _MY_HELPER_FCT_
+#define _MY_HELPER_FCT_
+
+#include <unistd.h>
+#include "esp_log.h"
+
+
+/* Core constants fot xTaskCreatePinnedToCore() function */
+const uint32_t CORE_0 = 0;
+const uint32_t CORE_1 = 1;
+const uint32_t PRO_CPU = 0;
+const uint32_t APP_CPU = 1;
+
+/**
+ * @brief Macro to display the buffer with arguments. msg is a formatted string as printf() function.
+ * 
+ */
+#define DISPLAY(msg, ...) printf("%d:%d>\t"msg"\r\n", xTaskGetTickCount(), xPortGetCoreID(), ##__VA_ARGS__);
+
+
+/**
+ * @brief Macro to display error/warning/info for the buffer with arguments. msg is a formatted string as printf() function.
+ * 
+ */
+#define DISPLAYE(tag, msg, ...) ESP_LOGE(tag, "%d:%d>\t"msg"", xTaskGetTickCount(), xPortGetCoreID(), ##__VA_ARGS__);
+
+#define DISPLAYW(tag, msg, ...) ESP_LOGW(tag, "%d:%d>\t"msg"", xTaskGetTickCount(), xPortGetCoreID(), ##__VA_ARGS__);
+
+#define DISPLAYI(tag, msg, ...) ESP_LOGI(tag, "%d:%d>\t"msg"", xTaskGetTickCount(), xPortGetCoreID(), ##__VA_ARGS__);
+
+/**
+ * @brief Macro to display the buffer without argument
+ * 
+ */
+#define DISPLAYB(msg) printf("%d:%d>\t", xTaskGetTickCount(), xPortGetCoreID());\
+	printf(msg);\
+	printf("\r\n");
+
+
+/* Consume CPU cycles. Time parameter is for the default frequency: 160MHz (ESP32_DEFAULT_CPU_FREQ_MHZ=160) */
+#define COMPUTE_IN_TIME_US(time_us) {register uint32_t i=(uint32_t)time_us*5.02*100/22; while (i-- > 0) {asm(" nop");}}
+
+#define COMPUTE_IN_TIME_MS(time_ms) {register uint32_t i=(uint32_t)time_ms*1000*5.02*100/22; while (i-- > 0) {asm(" nop");}} 
+
+#define COMPUTE_IN_TICK(tick) {register uint32_t i=(uint32_t)(tick*1000/configTICK_RATE_HZ)*1000*5.02*100/22; while (i-- > 0) {asm(" nop");}} 
+
+#endif

part3_freertos/lab2-1_single_msg_queue/readme.md

@@ -0,0 +1,294 @@
+# Visual Studio Code Template for ESP32
+
+## Prerequisites
+
+We consider that the Espressif IoT Development Framework (ESP-IDF), version 4.4.1, and Visual Studio Code environment is installed on the computer.
+For more details, see:  
+- https://docs.espressif.com/projects/esp-idf/en/v4.4.1/esp32/get-started/index.html#installation-step-by-step
+- https://code.visualstudio.com/
+
+As of VS-code v1.56.1 integrated terminals require additional configuration to work correctly. see https://code.visualstudio.com/docs/getstarted/settings#_settings-file-locations to edit the `setting.json` file and add the following entry:
+```bash
+"terminal.integrated.allowWorkspaceConfiguration":true
+```
+
+In Linux (from Ubuntu 20.x), on connecting an ESP32 board with a CP210x USB to serial converter, there is a problem of connection. Add the following entries below that disable both parts of the brltty service and allowed the ESP32 development boards to properly connect.
+```bash
+sudo systemctl stop brltty-udev.service
+sudo systemctl mask brltty-udev.service
+sudo systemctl stop brltty.service
+sudo systemctl disable brltty.service
+```
+Another solution is to uninstall brltty as below: 
+```bash
+sudo apt remove brltty
+```
+
+## Getting Started
+
+Firstly, you have to clone the `esp32-vscode-project-template` project and follow the next steps.
+```bash
+git clone https://github.com/fmuller-pns/esp32-vscode-project-template.git
+```
+
+#### 1. Rename the `vscode_project_template` folder
+```bash
+mv esp32-vscode-project-template <my_project_name>
+```
+#### 2. Go to the project directory
+```bash
+cd <my_project_name>
+```
+#### 3. Remove the GIT directory
+```bash
+rm -fR .git
+```
+#### 4. Open visual studio code for the new project
+```bash
+code .
+```
+#### 5. Verify paths in the `c_cpp_properties.json` file and change them if wrong.
+```json
+"IDF_TOOLS": "~/.espressif/tools",
+"IDF_PATH": "~/esp/esp-idf"
+```
+#### 6. [Not required] Change the default project name called `main` in files.
+This step renames the executable file. By default, the executable file is `main.elf`.
+1. Open `CMakeLists.txt` and replace `main` by <my_project_name>
+2. Open `Makefile` and replace `main` by <my_project_name>
+3. Open `.vscode/launch.json` and replace `main` by <my_project_name> (lines 11 and 19)
+
+#### 7. Open a terminal from Visual Studio Code to perform commands
+Choose an external or internal terminal.
+
+##### Open integrated terminal from Visual Studio Code
+
+  * using keyboard shortcut: `Ctrl+Shift+`<sup>2</sup>
+  * or pressing `F1` key and typing `integrated`
+
+##### Open external terminal from Visual Studio Code
+
+  * using keyboard shortcut: `Ctrl+Shift+C`
+  * or pressing `F1` key and typing `external`
+
+#### 8. Identify the USB serial port (usually `/dev/ttyUSB0`)
+```bash
+ls /dev/ttyUSB*
+```
+<span style="color:yellow">/dev/ttyUSB0</span>
+
+#### 9. Building, flashing and running project
+The serial port is `/dev/ttyUSB0` identified above.
+
+```bash
+idf.py -p /dev/ttyUSB0 flash monitor
+```
+
+##### Push the button on the ESP32 board when connecting
+
+```bash
+Serial port /dev/ttyUSB0
+Connecting........_____....._
+Detecting chip type... ESP32
+Chip is ESP32-PICO-D4 (revision 1)
+```
+
+##### Flashing and monitoring
+The message "`Hello ESP32 !`" appears.
+```bash
+...
+W (290) spi_flash: Detected size(4096k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
+I (300) cpu_start: Starting scheduler on PRO CPU.
+I (0) cpu_start: Starting scheduler on APP CPU.
+Hello ESP32 !
+```
+
+To exit monitoring, typing `Ctrl+AltGr+]`
+
+## Useful Commands 
+
+#### Open external terminal from vscode to perform commands
+
+  * using keyboard shortcut: `Ctrl+Shift+C`
+  * or pressing `F1` key and typing `external`
+
+#### Open integrated terminal from vscode to perform commands
+
+  * using keyboard shortcut: `Ctrl+Shift+`<sup>2</sup>
+  * or pressing `F1` key and typing `integrated`
+
+#### Clean project
+```bash
+idf.py fullclean
+```
+
+#### Configuration of the ESP32 board (only in external terminal)
+```bash
+idf.py menuconfig
+```
+
+#### Compile and build the executable file (`.elf` extension)
+```bash
+idf.py build
+```
+
+#### Identify the USB serial port (usually `/dev/ttyUSB0`)
+```bash
+ls /dev/ttyUSB*
+```
+
+#### Compile, build, flash
+```bash
+idf.py -p /dev/ttyUSB0 flash
+```
+
+#### Compile, build, flash and monitor
+```bash
+idf.py -p /dev/ttyUSB0 flash monitor
+```
+To exit monitoring, typing `Ctrl+AltGr+]`
+
+## Using Tasks for ESP32 to run, debug Project and so on
+
+1. In the menu, select `Run Task...`
+2. Select the task you want to launch:
+- `ESP32 - Build only`: just build the project
+- `ESP32 - Flash and Monitor`: build (when modifications of code), flash and monitor
+- `ESP32 - Clean Project`: Clean project (Full clean)
+- `ESP32 - OpenOCD with FT2232`: Run in dedicated terminal the openOCD command to debug the project
+- `ESP32 - Doxygen - HTML doc.`: Generate HTML documentation with Doxygen
+
+## Configure GIT for your new project
+
+#### Go to your new project folder
+```bash
+cd <project_name>
+```
+#### Configure name and email address
+```bash
+git config --global user.name "your name" 
+git config --global user.email "your email address"
+```
+#### Avoid typing your username and personal access token in vscode each time
+This is useful when connecting your GIT to GitHub.
+```bash
+git config credential.helper store
+```
+
+## Using GITHUB with visual studio code
+
+We consider you have followed the sections above:
+* Getting Started
+* Configure GIT for your new project
+
+Now, how to communicate with GitHub ?
+
+1. Open visual studio code.
+2. Click on the `Source Control` icon on your left side or use `Ctrl+Shift+G` shortcut. 
+3. For the first time, click on `Initialize Repository` button
+4. Enter a message for your first commit (ex: first commit) and click on Commit icon
+5. Press `F1` and typing `git add remote` and entering :
+   * *remote name* : your github repository previously created
+   * *remote url* : https://github.com/xxx/your_project.git
+   * *username* and *password*
+6. Push to the GitHub server (master branch)
+
+See https://code.visualstudio.com/docs/editor/versioncontrol for more details.
+
+## Debugging with JTAG FT2232
+
+You must install FTDI FT2232 driver.
+### Quick Driver installation for Linux:
+
+1. Install USB Driver
+```bash
+sudo apt-get install libusb-1.0
+$ lsusb
+Bus 001 Device 002: ID 0403:6010 Future Technology Devices International, Ltd FT2232C Dual USB-UART/FIFO IC
+```
+2. Install OpenOCD rules. The path for rule copy can be different and depend on your ESP-IDF installation.
+```bash
+$ sudo usermod -a -G dialout $USER
+$ sudo usermod -a -G plugdev $USER
+$ sudo cp ~/.espressif/tools/openocd-esp32/v0.10.0-esp32-20210401/openocd-esp32/share/openocd/contrib/60-openocd.rules /etc/udev/rules.d/
+$ sudo reboot
+```
+
+### Step 1: From external terminals
+
+1. Connect the ESP32 board (USB)
+2. Open an external terminal for building, flashing and running project
+The serial port is `/dev/ttyUSB0` identified above.
+```bash
+idf.py -p /dev/ttyUSB0 flash monitor
+```
+3. Connect the JTAG FT2232 (USB)
+4. Open another external terminal for running `openocd` with configuration file (`ftdi_ft2232.cfg`) located in the project root.
+```bash
+openocd -f ftdi_ft2232.cfg
+```
+
+5. Result on openocd terminal
+```bash
+Open On-Chip Debugger  v0.10.0-esp32-20190313 (2019-03-13-09:52)
+Licensed under GNU GPL v2
+adapter speed: 20000 kHz
+Info : Configured 2 cores
+esp32 interrupt mask on
+Info : Listening on port 6666 for tcl connections
+Info : Listening on port 4444 for telnet connections
+Info : ftdi: if you experience problems at higher adapter clocks, try the command "ftdi_tdo_sample_edge falling"
+Info : clock speed 20000 kHz
+Info : JTAG tap: esp32.cpu0 tap/device found: 0x120034e5 (mfg: 0x272 (Tensilica), part: 0x2003, ver: 0x1)
+Info : JTAG tap: esp32.cpu1 tap/device found: 0x120034e5 (mfg: 0x272 (Tensilica), part: 0x2003, ver: 0x1)
+Info : esp32: Debug controller 0 was reset (pwrstat=0x5F, after clear 0x0F).
+Info : esp32: Core 0 was reset (pwrstat=0x5F, after clear 0x0F).
+Info : esp32: Debug controller 1 was reset (pwrstat=0x5F, after clear 0x0F).
+Info : esp32: Core 1 was reset (pwrstat=0x5F, after clear 0x0F).
+Info : Detected debug stubs @ 3ffb2950 on core0 of target 'esp32'
+Info : Listening on port 3333 for gdb connections
+```
+
+### Step 2: From Visual Studio Code
+1. Click on the left on the line you want to set a breakpoint. A red bullet appears.
+
+2. Click on debug Icon
+
+3. Click on RUN `ESP32 OpenOCD`. If an error arises, click again.
+
+4. The program stops at the breakpoint and you can see variables and more
+
+### Step 3: When you modify the code
+
+Do not touch the terminal with `openocd` command. 
+
+1. Stop the program into the terminal, typing `Ctrl+AltGr+]`
+2. Build, flash and run program
+The serial port is `/dev/ttyUSB0` identified above.
+```bash
+idf.py -p /dev/ttyUSB0 flash monitor
+```
+3. Click on RUN `ESP32 OpenOCD`. If an error arises, click again.
+4. The program stops at the breakpoint and you can see variables and more 
+
+## Generate Doxygen documentation
+
+You can use [Using Tasks for ESP32](#using-tasks-for-esp32-to-run-debug-project-and-so-on) or follow the steps below.
+
+1. Open external terminal from vscode, using keyboard shortcut: `Ctrl+Shift+C`, or pressing `F1` key and typing `external`
+2. Generate HTML documentation in `html_doc` folder
+
+  * From the User interface (allow you updating the `Doxyfile` configuration file)
+
+```bash
+doxywizard
+```
+
+  * Directly from `Doxyfile` configuration file
+
+
+```bash
+doxygen
+```
+3. A new `html` folder  is created, the entry file is `index.html`
+

part3_freertos/lab2-1_single_msg_queue/sdkconfig.defaults

@@ -0,0 +1,9 @@
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_ESPTOOLPY_FLASHSIZE="4MB"
+
+# disable watchdog for task
+CONFIG_ESP_TASK_WDT=n
+
+# 2 cores to perform freertos
+CONFIG_FREERTOS_UNICORE=n
+

part3_freertos/lab2-4_single_msg_queue_interrupt/.gitignore

@@ -0,0 +1,10 @@
+
+# Configuration files
+sdkconfig
+sdkconfig.old
+
+# Production folder
+build/
+
+# HTML documentation
+html_doc/

part3_freertos/lab2-4_single_msg_queue_interrupt/CMakeLists.txt

@@ -0,0 +1,6 @@
+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(main)

part3_freertos/lab2-4_single_msg_queue_interrupt/Makefile

@@ -0,0 +1,3 @@
+PROJECT_NAME := main
+
+include $(IDF_PATH)/make/project.mk

part3_freertos/lab2-4_single_msg_queue_interrupt/ftdi_ft2232.cfg

@@ -0,0 +1,22 @@
+interface ftdi
+ftdi_vid_pid 0x0403 0x6010
+ftdi_layout_init 0x0038 0x003b
+
+# The ESP32 only supports JTAG.
+transport select jtag
+
+# This can go as high as 20MHz if CPU frequency is 80MHz, or 26MHz
+# if CPU frequency is 160MHz or 240MHz.
+adapter_khz 20000
+
+# If single core debugging is required, uncomment the following line
+#set ESP32_ONLYCPU 1
+
+# To disable RTOS support, uncomment the following line
+# set ESP32_RTOS none
+
+# This option defaults to 3.3v
+set ESP32_FLASH_VOLTAGE 3.3
+
+# Source the ESP32 configuration file
+source [find target/esp32.cfg]

part3_freertos/lab2-4_single_msg_queue_interrupt/main/CMakeLists.txt

@@ -0,0 +1,3 @@
+idf_component_register(
+            SRC_DIRS "." 
+            INCLUDE_DIRS ".")

part3_freertos/lab2-4_single_msg_queue_interrupt/main/component.mk

@@ -0,0 +1,2 @@
+COMPONENT_SRCDIRS := .
+COMPONENT_ADD_INCLUDEDIRS := .

part3_freertos/lab2-4_single_msg_queue_interrupt/main/main.c

@@ -0,0 +1,105 @@
+/****************************************************************************
+ * Copyright (C) 2020 by Fabrice Muller                                     *
+ *                                                                          *
+ * This file is useful for ESP32 Design course.                             *
+ *                                                                          *
+ ****************************************************************************/
+
+/**
+ * @file lab2-4_main.c
+ * @author Fabrice Muller
+ * @date 13 Oct. 2020
+ * @brief File containing the lab2-4 of Part 3.
+ *
+ * @see https://github.com/fmuller-pns/esp32-vscode-project-template
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "esp_log.h"
+
+/* FreeRTOS.org includes. */
+#include "freertos/FreeRTOSConfig.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/semphr.h"
+
+#include "my_helper_fct.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "esp_log.h"
+#include "soc/rtc_wdt.h"
+#include "driver/gpio.h"
+
+#include "freertos/FreeRTOSConfig.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/semphr.h"
+
+#include "my_helper_fct.h"
+
+static const char* TAG = "MsgQ";
+
+// Push button for interrupt
+static const gpio_num_t PIN_PUSH_BUTTON = 15;
+
+/* Stack size for all tasks */
+const uint32_t TASK_STACK_SIZE = 4096;
+
+
+void app_main(void) {
+
+	/* Config GPIO */
+
+
+	/* Create Message Queue and Check if created */
+	
+
+	/* Create vCounterTask task */
+						
+
+	/* Install ISR */
+	
+
+	/* to ensure its exit is clean */
+	vTaskDelete(NULL);
+}
+
+void vCounterTask(void *pvParameters) {
+
+	for (;; ) {
+
+		/* Wait for message with 5 sec. otherwise DISPLAY a message to push it */
+		
+		/* If pushed */
+		
+			// DISPLAY "Button pushed" and the isrCount variable
+		
+			// Get the number of items in the queue
+			
+			// DISPLAYI (Information display) number of items if greater than 1
+		
+			// Waiting for push button signal is 1 again (test every 20 ms)
+			
+			// DISPLAY "Button released"
+		
+		/* Else If Time out */
+		
+			// Display message "Please, push the button!"
+		
+	}
+}
+
+
+static void IRAM_ATTR Push_button_isr_handler(void *args) {
+
+	// Increment isrCount
+	
+	// Send message
+
+}
+

part3_freertos/lab2-4_single_msg_queue_interrupt/readme.md

@@ -0,0 +1,294 @@
+# Visual Studio Code Template for ESP32
+
+## Prerequisites
+
+We consider that the Espressif IoT Development Framework (ESP-IDF), version 4.4.1, and Visual Studio Code environment is installed on the computer.
+For more details, see:  
+- https://docs.espressif.com/projects/esp-idf/en/v4.4.1/esp32/get-started/index.html#installation-step-by-step
+- https://code.visualstudio.com/
+
+As of VS-code v1.56.1 integrated terminals require additional configuration to work correctly. see https://code.visualstudio.com/docs/getstarted/settings#_settings-file-locations to edit the `setting.json` file and add the following entry:
+```bash
+"terminal.integrated.allowWorkspaceConfiguration":true
+```
+
+In Linux (from Ubuntu 20.x), on connecting an ESP32 board with a CP210x USB to serial converter, there is a problem of connection. Add the following entries below that disable both parts of the brltty service and allowed the ESP32 development boards to properly connect.
+```bash
+sudo systemctl stop brltty-udev.service
+sudo systemctl mask brltty-udev.service
+sudo systemctl stop brltty.service
+sudo systemctl disable brltty.service
+```
+Another solution is to uninstall brltty as below: 
+```bash
+sudo apt remove brltty
+```
+
+## Getting Started
+
+Firstly, you have to clone the `esp32-vscode-project-template` project and follow the next steps.
+```bash
+git clone https://github.com/fmuller-pns/esp32-vscode-project-template.git
+```
+
+#### 1. Rename the `vscode_project_template` folder
+```bash
+mv esp32-vscode-project-template <my_project_name>
+```
+#### 2. Go to the project directory
+```bash
+cd <my_project_name>
+```
+#### 3. Remove the GIT directory
+```bash
+rm -fR .git
+```
+#### 4. Open visual studio code for the new project
+```bash
+code .
+```
+#### 5. Verify paths in the `c_cpp_properties.json` file and change them if wrong.
+```json
+"IDF_TOOLS": "~/.espressif/tools",
+"IDF_PATH": "~/esp/esp-idf"
+```
+#### 6. [Not required] Change the default project name called `main` in files.
+This step renames the executable file. By default, the executable file is `main.elf`.
+1. Open `CMakeLists.txt` and replace `main` by <my_project_name>
+2. Open `Makefile` and replace `main` by <my_project_name>
+3. Open `.vscode/launch.json` and replace `main` by <my_project_name> (lines 11 and 19)
+
+#### 7. Open a terminal from Visual Studio Code to perform commands
+Choose an external or internal terminal.
+
+##### Open integrated terminal from Visual Studio Code
+
+  * using keyboard shortcut: `Ctrl+Shift+`<sup>2</sup>
+  * or pressing `F1` key and typing `integrated`
+
+##### Open external terminal from Visual Studio Code
+
+  * using keyboard shortcut: `Ctrl+Shift+C`
+  * or pressing `F1` key and typing `external`
+
+#### 8. Identify the USB serial port (usually `/dev/ttyUSB0`)
+```bash
+ls /dev/ttyUSB*
+```
+<span style="color:yellow">/dev/ttyUSB0</span>
+
+#### 9. Building, flashing and running project
+The serial port is `/dev/ttyUSB0` identified above.
+
+```bash
+idf.py -p /dev/ttyUSB0 flash monitor
+```
+
+##### Push the button on the ESP32 board when connecting
+
+```bash
+Serial port /dev/ttyUSB0
+Connecting........_____....._
+Detecting chip type... ESP32
+Chip is ESP32-PICO-D4 (revision 1)
+```
+
+##### Flashing and monitoring
+The message "`Hello ESP32 !`" appears.
+```bash
+...
+W (290) spi_flash: Detected size(4096k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
+I (300) cpu_start: Starting scheduler on PRO CPU.
+I (0) cpu_start: Starting scheduler on APP CPU.
+Hello ESP32 !
+```
+
+To exit monitoring, typing `Ctrl+AltGr+]`
+
+## Useful Commands 
+
+#### Open external terminal from vscode to perform commands
+
+  * using keyboard shortcut: `Ctrl+Shift+C`
+  * or pressing `F1` key and typing `external`
+
+#### Open integrated terminal from vscode to perform commands
+
+  * using keyboard shortcut: `Ctrl+Shift+`<sup>2</sup>
+  * or pressing `F1` key and typing `integrated`
+
+#### Clean project
+```bash
+idf.py fullclean
+```
+
+#### Configuration of the ESP32 board (only in external terminal)
+```bash
+idf.py menuconfig
+```
+
+#### Compile and build the executable file (`.elf` extension)
+```bash
+idf.py build
+```
+
+#### Identify the USB serial port (usually `/dev/ttyUSB0`)
+```bash
+ls /dev/ttyUSB*
+```
+
+#### Compile, build, flash
+```bash
+idf.py -p /dev/ttyUSB0 flash
+```
+
+#### Compile, build, flash and monitor
+```bash
+idf.py -p /dev/ttyUSB0 flash monitor
+```
+To exit monitoring, typing `Ctrl+AltGr+]`
+
+## Using Tasks for ESP32 to run, debug Project and so on
+
+1. In the menu, select `Run Task...`
+2. Select the task you want to launch:
+- `ESP32 - Build only`: just build the project
+- `ESP32 - Flash and Monitor`: build (when modifications of code), flash and monitor
+- `ESP32 - Clean Project`: Clean project (Full clean)
+- `ESP32 - OpenOCD with FT2232`: Run in dedicated terminal the openOCD command to debug the project
+- `ESP32 - Doxygen - HTML doc.`: Generate HTML documentation with Doxygen
+
+## Configure GIT for your new project
+
+#### Go to your new project folder
+```bash
+cd <project_name>
+```
+#### Configure name and email address
+```bash
+git config --global user.name "your name" 
+git config --global user.email "your email address"
+```
+#### Avoid typing your username and personal access token in vscode each time
+This is useful when connecting your GIT to GitHub.
+```bash
+git config credential.helper store
+```
+
+## Using GITHUB with visual studio code
+
+We consider you have followed the sections above:
+* Getting Started
+* Configure GIT for your new project
+
+Now, how to communicate with GitHub ?
+
+1. Open visual studio code.
+2. Click on the `Source Control` icon on your left side or use `Ctrl+Shift+G` shortcut. 
+3. For the first time, click on `Initialize Repository` button
+4. Enter a message for your first commit (ex: first commit) and click on Commit icon
+5. Press `F1` and typing `git add remote` and entering :
+   * *remote name* : your github repository previously created
+   * *remote url* : https://github.com/xxx/your_project.git
+   * *username* and *password*
+6. Push to the GitHub server (master branch)
+
+See https://code.visualstudio.com/docs/editor/versioncontrol for more details.
+
+## Debugging with JTAG FT2232
+
+You must install FTDI FT2232 driver.
+### Quick Driver installation for Linux:
+
+1. Install USB Driver
+```bash
+sudo apt-get install libusb-1.0
+$ lsusb
+Bus 001 Device 002: ID 0403:6010 Future Technology Devices International, Ltd FT2232C Dual USB-UART/FIFO IC
+```
+2. Install OpenOCD rules. The path for rule copy can be different and depend on your ESP-IDF installation.
+```bash
+$ sudo usermod -a -G dialout $USER
+$ sudo usermod -a -G plugdev $USER
+$ sudo cp ~/.espressif/tools/openocd-esp32/v0.10.0-esp32-20210401/openocd-esp32/share/openocd/contrib/60-openocd.rules /etc/udev/rules.d/
+$ sudo reboot
+```
+
+### Step 1: From external terminals
+
+1. Connect the ESP32 board (USB)
+2. Open an external terminal for building, flashing and running project
+The serial port is `/dev/ttyUSB0` identified above.
+```bash
+idf.py -p /dev/ttyUSB0 flash monitor
+```
+3. Connect the JTAG FT2232 (USB)
+4. Open another external terminal for running `openocd` with configuration file (`ftdi_ft2232.cfg`) located in the project root.
+```bash
+openocd -f ftdi_ft2232.cfg
+```
+
+5. Result on openocd terminal
+```bash
+Open On-Chip Debugger  v0.10.0-esp32-20190313 (2019-03-13-09:52)
+Licensed under GNU GPL v2
+adapter speed: 20000 kHz
+Info : Configured 2 cores
+esp32 interrupt mask on
+Info : Listening on port 6666 for tcl connections
+Info : Listening on port 4444 for telnet connections
+Info : ftdi: if you experience problems at higher adapter clocks, try the command "ftdi_tdo_sample_edge falling"
+Info : clock speed 20000 kHz
+Info : JTAG tap: esp32.cpu0 tap/device found: 0x120034e5 (mfg: 0x272 (Tensilica), part: 0x2003, ver: 0x1)
+Info : JTAG tap: esp32.cpu1 tap/device found: 0x120034e5 (mfg: 0x272 (Tensilica), part: 0x2003, ver: 0x1)
+Info : esp32: Debug controller 0 was reset (pwrstat=0x5F, after clear 0x0F).
+Info : esp32: Core 0 was reset (pwrstat=0x5F, after clear 0x0F).
+Info : esp32: Debug controller 1 was reset (pwrstat=0x5F, after clear 0x0F).
+Info : esp32: Core 1 was reset (pwrstat=0x5F, after clear 0x0F).
+Info : Detected debug stubs @ 3ffb2950 on core0 of target 'esp32'
+Info : Listening on port 3333 for gdb connections
+```
+
+### Step 2: From Visual Studio Code
+1. Click on the left on the line you want to set a breakpoint. A red bullet appears.
+
+2. Click on debug Icon
+
+3. Click on RUN `ESP32 OpenOCD`. If an error arises, click again.
+
+4. The program stops at the breakpoint and you can see variables and more
+
+### Step 3: When you modify the code
+
+Do not touch the terminal with `openocd` command. 
+
+1. Stop the program into the terminal, typing `Ctrl+AltGr+]`
+2. Build, flash and run program
+The serial port is `/dev/ttyUSB0` identified above.
+```bash
+idf.py -p /dev/ttyUSB0 flash monitor
+```
+3. Click on RUN `ESP32 OpenOCD`. If an error arises, click again.
+4. The program stops at the breakpoint and you can see variables and more 
+
+## Generate Doxygen documentation
+
+You can use [Using Tasks for ESP32](#using-tasks-for-esp32-to-run-debug-project-and-so-on) or follow the steps below.
+
+1. Open external terminal from vscode, using keyboard shortcut: `Ctrl+Shift+C`, or pressing `F1` key and typing `external`
+2. Generate HTML documentation in `html_doc` folder
+
+  * From the User interface (allow you updating the `Doxyfile` configuration file)
+
+```bash
+doxywizard
+```
+
+  * Directly from `Doxyfile` configuration file
+
+
+```bash
+doxygen
+```
+3. A new `html` folder  is created, the entry file is `index.html`
+