par5

part5_i2c_com/lab2-1_temp_sensor/.gitignore

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+
+# Configuration files
+sdkconfig
+sdkconfig.old
+
+# Production folder
+build/
+
+# HTML documentation
+html_doc/

part5_i2c_com/lab2-1_temp_sensor/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)

part5_i2c_com/lab2-1_temp_sensor/Makefile

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

part5_i2c_com/lab2-1_temp_sensor/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]

part5_i2c_com/lab2-1_temp_sensor/main/CMakeLists.txt

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+idf_component_register(
+            SRC_DIRS "." 
+            INCLUDE_DIRS ".")

part5_i2c_com/lab2-1_temp_sensor/main/LM75A.c

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+/****************************************************************************
+ * Copyright (C) 2021 by Fabrice Muller                                     *
+ *                                                                          *
+ * This file is useful for ESP32 Design course.                             *
+ *                                                                          *
+ ****************************************************************************/
+
+/**
+ * @file LM75A.c
+ * @author Fabrice Muller
+ * @date 12 Nov. 2021
+ * @brief File containing the lab2-1 of Part 5.
+ *
+ * @see https://github.com/fmuller-pns/esp32-vscode-project-template
+ */
+
+#include "LM75A.h"
+#include "math.h"
+
+/* Local variables */
+static uint8_t i2c_port;
+static uint8_t i2c_addr;
+
+/**
+ * @brief Init the LM75a device
+ * 
+ * @param i2c_port_ port number
+ * @param i2c_addr_ address of device
+ */
+void lm75a_init(uint8_t i2c_port_, uint8_t i2c_addr_) {
+    i2c_port = i2c_port_;
+    i2c_addr = i2c_addr_;
+}
+
+/**
+ * @brief Read 2 bytes of the LM75a register
+ * 
+ * @param raw array of 2 bytes
+ * @return esp_err_t ESP_OK if no error
+ */
+esp_err_t lm75a_readRegister(uint8_t *raw) {
+
+    esp_err_t result;
+    i2c_cmd_handle_t cmd_handle;
+    
+    // Create and init command link
+    cmd_handle = i2c_cmd_link_create();
+
+    // Start
+    // i2c_master_start()
+    if ((result = i2c_master_start(cmd_handle)) != ESP_OK)
+        return result;
+
+    // Write with ack : the READ command : at i2c_addr (7 bits) & READ (1 bit)
+    i2c_master_write_byte(cmd_handle, (i2c_addr << 1) | I2C_MASTER_READ, true);
+
+
+    // Read 2 bytes with NACK for the last byte (master)
+    i2c_master_read(cmd_handle,raw,2, I2C_MASTER_LAST_NACK);
+    
+
+    // Stop
+    i2c_master_stop(cmd_handle);
+
+
+    // Execute the cmd handle on timeout (1s)
+    i2c_master_cmd_begin(0,cmd_handle, pdMS_TO_TICKS(1000));
+
+
+
+    // Free memory
+    i2c_cmd_link_delete(cmd_handle);
+
+
+    return ESP_OK;
+}
+
+/**
+ * @brief Convert the raw (2 bytes) to the temperature
+ * 
+ * @param raw array of 2 bytes of the LM75a register
+ * @return float temperature value
+ */
+float convertRawToTemperature(uint8_t *raw) {
+    /* Compute temperature value */
+    uint16_t data;
+    data = raw[0]<<8 |raw[1];
+    data = data >>5;
+    return (float)data*0.125;
+}
+
+/**
+ * @brief Get the temperature of the LM75a
+ * 
+ * @param temperature pointer to the temperature
+ * @return esp_err_t ESP_OK if no error
+ */
+esp_err_t lm75a_getTemperatureInDegree(float *temperature) {
+    esp_err_t result;
+    uint8_t raw[2] = {0,0};
+
+    /* Read Temperature register */
+    if ((result = lm75a_readRegister(raw)) != ESP_OK)
+        return result;
+
+    /* Compute temprature */
+    *temperature = convertRawToTemperature(raw);
+
+    return ESP_OK;
+}

part5_i2c_com/lab2-1_temp_sensor/main/LM75A.h

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+/****************************************************************************
+ * Copyright (C) 2021 by Fabrice Muller                                     *
+ *                                                                          *
+ * This file is useful for ESP32 Design course.                             *
+ *                                                                          *
+ ****************************************************************************/
+
+/**
+ * @file LM75A.h
+ * @author Fabrice Muller
+ * @date 12 Nov. 2021
+ * @brief File containing the lab2-1 of Part 5.
+ *
+ * @see https://github.com/fmuller-pns/esp32-vscode-project-template
+ */
+
+#ifndef _LM75A_H_
+#define _LM75A_H_
+
+#include <stdio.h>
+#include "driver/i2c.h"
+
+// slave address 
+#define LM75A_ADDRESS 0x48
+
+// Registers
+#define TEMP_REG_OFFSET 0
+#define CONF_REG_OFFSET 1
+#define THYST_REG_OFFSET 2
+#define TOS_REG_OFFSET 3
+
+void lm75a_init(uint8_t i2c_port_, uint8_t i2c_addr_);
+
+esp_err_t lm75a_readRegister(uint8_t *raw);
+
+esp_err_t lm75a_getTemperatureInDegree(float *temperature);
+float convertRawToTemperature(uint8_t *raw);
+
+#endif

part5_i2c_com/lab2-1_temp_sensor/main/component.mk

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+COMPONENT_SRCDIRS := .
+COMPONENT_ADD_INCLUDEDIRS := .

part5_i2c_com/lab2-1_temp_sensor/main/main.c

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+/****************************************************************************
+ * Copyright (C) 2021 by Fabrice Muller                                     *
+ *                                                                          *
+ * This file is useful for ESP32 Design course.                             *
+ *                                                                          *
+ ****************************************************************************/
+
+/**
+ * @file main.c
+ * @author Fabrice Muller
+ * @date 12 Nov. 2021
+ * @brief File containing the lab2-1 of Part 5.
+ *
+ * @see https://github.com/fmuller-pns/esp32-vscode-project-template
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "driver/i2c.h"
+#include "esp_types.h"
+#include "esp_log.h"
+
+#include "LM75A.h"
+
+static const char *TAG = "MAIN";
+
+/* 
+ * I2C Pins
+ * SDA: GPIO26, SCL: GPIO25 
+ */
+#define SDA_GPIO 26
+#define SCL_GPIO 25
+
+// I2C port number : N°0
+#define LM75A_PORT_NUM 0
+
+/**
+ * @brief Starting point function
+ * 
+ */
+
+void app_main(void) {
+
+    /* Install I2C driver : MASTER mode, GPIO SDA/SCL, SDA/SCL Pullup enable (GPIO_PULLUP ... constant), Freq=10KHz */
+    i2c_config_t i2c_config = {
+        .mode = I2C_MODE_MASTER,
+        .sda_io_num = SDA_GPIO,
+        .scl_io_num = SCL_GPIO,
+        .sda_pullup_en = true,
+        .scl_pullup_en = true,
+        .master.clk_speed = 10000};
+    i2c_param_config(LM75A_PORT_NUM, &i2c_config);
+    i2c_driver_install(LM75A_PORT_NUM, I2C_MODE_MASTER, 0, 0, 0);
+
+    /* Init LM75a for i2c */
+    lm75a_init(LM75A_PORT_NUM, LM75A_ADDRESS);
+
+    esp_err_t result;
+    uint8_t raw[2];
+    float temperature = 0;
+
+	/* Get Temperature each 2 seconds */
+	for (;;) {
+		// Waiting for 2 seconds
+		vTaskDelay(pdMS_TO_TICKS(2000));
+
+        /* Read Temperature register */
+        lm75a_readRegister(&raw);
+
+        /* Compute temperature */
+        temperature = convertRawToTemperature(&raw);
+
+        /* Print temprature */
+		printf("Temperature: %.2f °C\n", temperature);
+	}
+
+}

part5_i2c_com/lab2-1_temp_sensor/readme.md

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+# 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`
+

part5_i2c_com/lab2-1_temp_sensor/sdkconfig(2).defaults

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+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_ESPTOOLPY_FLASHSIZE="4MB"
+