【Smart Network Desk Lamp】4. Using the onboard buttons of ESP32-S2

hehung

【Smart Network Desk Lamp】4. Using the onboard buttons of ESP32-S2 [Copy link]

 

# Past sharing [【2022 Digi-Key Innovation Design Competition】Latest unboxing post](https://bbs.eeworld.com.cn/thread-1212955-1-1.html "【2022 Digi-Key Innovation Design Competition】Latest unboxing post") [【2022 Digi-Key Innovation Design Competition】1. ESP32-S2 environment construction and lighting](【2022 Digi-Key Innovation Design Competition】1. ESP32-S2 environment construction and lightinghttps://bbs.eeworld.com.cn/thread-1213265-1-1.html "【2022 Digi-Key Innovation Design Competition】1. ESP32-S2 environment construction and lighting") [【Smart network desk lamp】2. Set system time and print](【Smart network desk lamp】2. Set system time and printhttps://bbs.eeworld.com.cn/thread-1215299-1-1.html "【Smart network desk lamp】2. Set system time and print") [【Smart Network Desk Lamp】3. ESP32-S2 + lvgl Use](【Smart Network Desk Lamp】3. ESP32-S2 + lvgl Usehttps://bbs.eeworld.com.cn/thread-1215559-1-1.html "【Smart Network Desk Lamp】3. ESP32-S2 + lvgl Use") # Preface esp32-s2-kaluga-1 is equipped with 6 user buttons and a touch button board, and an LCD screen is also onboard. The original intention was to use the LCD touch screen for control in the project, but after checking the information, I found that the touch function of this board was cancelled in the hardware design: Onion-6: <ignore_js_op> <img style="cursor:pointer;" id="aimg_636090" aid="636090" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202208/26/132430il39z4t92fwb9unq.png" file="data/attachment/forum/202208/26/132430il39z4t92fwb9unq.png" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_636090_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>2.png</strong> <em class="xg1">(54.49 KB, downloads: 0)</em></p> <p> <a href="javascript:;" class="loginf" >download attach</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_636090" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=636090&handlekey=savephoto_636090">save to album</a> </p> <p class="xg1 y">2022-8-26 13:24 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op> <ignore_js_op> <img style="cursor:pointer;" id="aimg_636091" aid="636091" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202208/26/132436vtxxt4274xx41yxm.png" file="data/attachment/forum/202208/26/132436vtxxt4274xx41yxm.png" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_636091_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>3.png</strong> <em class="xg1">(28.06 KB, downloads: 0)</em></p> <p> <a href="javascript:;" class="loginf" >download attach</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_636091" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=636091&handlekey=savephoto_636091">save to album</a> </p> <p class="xg1 y">2022-8-26 13:24 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op> This is for the consideration of pin reuse, but is this really good? Wouldn't it be better to cancel the touchpad and use the LCD screen touch driver? Alas, I can only use the onboard buttons or touchpad. However, the touchpad uses more pins, and although there are six onboard buttons, because they are analog buttons, only one port is needed, so I decided to use the buttons as input devices in the project. This post will explain how to use the onboard buttons. # Hardware schematic diagram From the hardware schematic diagram, we can see that <ignore_js_op> <img style="cursor:pointer;" id="aimg_636132" aid="636132" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202208/26/135023j7n51ozsginkynsn.png" file="data/attachment/forum/202208/26/135023j7n51ozsginkynsn.png" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_636132_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>4.png</strong> <em class="xg1">(97.38 KB, downloads: 0)</em></p> <p> <a href="javascript:;" class="loginf" >download attach</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_636132" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=636132&handlekey=savephoto_636132">save to album</a> </p> <p class="xg1 y">2022-8-26 13:50 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op> AU_BT_ADC is connected to the 20pin of J5, as shown below: > The picture says J2, but it is actually wrong. It is actually J5. <ignore_js_op> <img style="cursor:pointer;" id="aimg_636401" aid="636401" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202208/26/181206xtzcivwnv3vvtwwc.png" file="data/attachment/forum/202208/26/181206xtzcivwnv3vvtwwc.png" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_636401_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>5.png</strong> <em class="xg1">(64.42 KB, downloads: 0)</em></p> <p> <a href="javascript:;" class="loginf" >download attach</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_636401" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=636401&handlekey=savephoto_636401">save to album</a> </p> <p class="xg1 y">2022-8-26 18:12 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op> J5's Pin20 is connected to GPIO6: <ignore_js_op> <img style="cursor:pointer;" id="aimg_636400" aid="636400" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202208/26/181206c6t3g6j4jn1vx5v9.png" file="data/attachment/forum/202208/26/181206c6t3g6j4jn1vx5v9.png" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_636400_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>7.png</strong> <em class="xg1">(123.4 KB, downloads: 0)</em></p> <p> <a href="javascript:;" class="loginf" >download attach</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_636400" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=636400&handlekey=savephoto_636400">save to album</a> </p> <p class="xg1 y">2022-8-26 18:12 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op> GPIO6 multiplexing relationship is SARADC1 Channel5: <ignore_js_op> <img style="cursor:pointer;" id="aimg_636402" aid="636402" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202208/26/181520i7bb5clfbldelbbs.png" file="data/attachment/forum/202208/26/181520i7bb5clfbldelbbs.png" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_636402_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>8.png</strong> <em class="xg1">(62.44 KB, downloads: 0)</em></p> <p> <a href="javascript:;" class="loginf" >download attach</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_636402" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=636402&handlekey=savephoto_636402">save to album</a> </p> <p class="xg1 y">2022-8-26 18:15 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op> For other detailed information, please refer to the ESP32-S2 chip technical reference manual: [https://www.espressif.com.cn/en/support/documents/technical-documents](https://www.espressif.com.cn/en/support/documents/technical-documents) # Software Development There is no need to explain too much about software development. This is an analog button. When different buttons are pressed, GPIO6 will collect different voltages. >However, there is a disadvantage of analog switches: when two or more buttons are pressed at the same time, they may be mistakenly recognized as other buttons being pressed. The advantage is that it saves IO ports and has accurate recognition. In my code, after the button is pressed, it will print out which button was pressed: ```c /* * app_button.c * * Created on: August 25, 2022* Author: hehung */ #include "app_button.h" #include "app_common.h" #include "sdkconfig.h" #include "esp_log.h" #include "freertos/FreeRTOS.h" #include "freertos/task.h" #include "driver/gpio.h" #include "driver/adc.h" #include "esp_system.h" #include "esp_event.h" #include "esp_heap_caps.h" typedef struct { /* Button pressed status in the previous cycle*/ uint8_t Last_Status; /* Button pressed status in the current cycle*/ uint8_t Curr_Status; /* Button command, Determine the current command by pressing the status*/ uint8_t Curr_Cmd; } s_BtnPressStatus; #define TAG "app_button" #define NO_OF_SAMPLES (64U) #define SAMPLE_TIME (200U) // Sampling time #define DEVIATION (0.1) // Get ADC offset value // Convert raw voltage sampling value to voltage #define ADC_VOLT_CONVERSION(raw_adc) ((2.60 * adc_reading) / 8191.0) #define BTN_NUM (6U) #define BTN_PRESSED (0U) #define BTN_RELEASED (1U) //Task priority #define BTN_TASK_PRIO (10U) //Task stack size (in words, under 32-bit processor, one word is equal to 4 bytes) #define BTN_TASK_SIZE (1024*3U) //Task handle static TaskHandle_t Btn_TaskHandle; //static xQueueHandle adc_queue = NULL; static void Btn_TaskCtrl(void *pvParameters); static void Button_Selection(double voltage); // Set an initial time void Btn_TaskInit(void) { portBASE_TYPE xReturn = pdPASS; xReturn = xTaskCreatePinnedToCore(&Btn_TaskCtrl, "Button_task", BTN_TASK_SIZE, NULL, BTN_TASK_PRIO,Btn_TaskHandle, CONFIG_ESP_MAIN_TASK_AFFINITY); if(pdPASS != xReturn) ESP_LOGE(TAG, "Button task create failed!"); } static void Btn_TaskCtrl(void *pvParameters) { uint32_t adc_reading = 0; double voltage = 0; // Initialize ADC adc1_config_width (ADC_WIDTH_BIT_13); adc1_config_channel_atten(ADC_CHANNEL_5, ADC_ATTEN_DB_11); // adc_queue = xQueueCreate(1, sizeof(double)); while (1) { // Average multiple samples for (int i = 0; i < NO_OF_SAMPLES; i++ ) { adc_reading += adc1_get_raw((adc1_channel_t)ADC_CHANNEL_5); } adc_reading /= NO_OF_SAMPLES; voltage = ADC_VOLT_CONVERSION(adc_reading); // ESP_LOGD(TAG, "ADC1 CH%d Raw: %d ; Voltage: %0.2lfV", ADC_CHANNEL_5, adc_reading, voltage); Button_Selection(voltage); // xQueueSend (adc_queue, (double *)&voltage, 0); vTaskDelay(pdMS_TO_TICKS(SAMPLE_TIME)); } } static void Button_Selection(double voltage) { // double voltage = 0; // xQueueReceive(adc_queue, &voltage, portMAX_DELAY); uint8_t i = 0U; static s_BtnPressStatus key_status[6] = { {BTN_RELEASED, BTN_RELEASED, BTN_RELEASED} }; if ((voltage > 2.30 - DEVIATION) && (voltage <= 2.30 + DEVIATION)) { key_status[0].Curr_Status = BTN_PRESSED; // ESP_LOGI(TAG, "K1 Pressed"); } else if ((voltage > 1.98 - DEVIATION) && (voltage <= 1.98 + DEVIATION)) { key_status[1].Curr_Status = BTN_PRESSED; // ESP_LOGI(TAG, "K2 Pressed"); } else if ((voltage > 1.65 - DEVIATION) && (voltage <= 1.65 + DEVIATION)) { key_status[2].Curr_Status = BTN_PRESSED; // ESP_LOGI(TAG, "K3 Pressed"); } else if ((voltage > 1.11 - DEVIATION) && (voltage <= 1.11 + DEVIATION)) { key_status[3].Curr_Status = BTN_PRESSED; // ESP_LOGI(TAG, "K4 Pressed"); } else if ((voltage > 0.82 - DEVIATION) && (voltage <= 0.82 + DEVIATION)) { key_status[4 ].Curr_Status = BTN_PRESSED; // ESP_LOGI(TAG, "K5 Pressed"); } else if ((voltage > 0.38 - DEVIATION) && (voltage <= 0.38 + DEVIATION)) { key_status[5].Curr_Status = BTN_PRESSED; / / ESP_LOGI(TAG, "K6 Pressed"); } else { for (i = 0; i < BTN_NUM; i++) { key_status<i>.Curr_Status = BTN_RELEASED; } } for (i = 0; i < BTN_NUM; i++) { if((BTN_PRESSED == key_status<i>.Curr_Status) && (BTN_RELEASED == key_status<i>.Last_Status)) { key_status<i>.Curr_Cmd = BTN_PRESSED; ESP_LOGI(TAG, "K%d activated ", i); } else if((BTN_RELEASED == key_status<i>.Curr_Status) && (BTN_PRESSED == key_status<i>.Last_Status)) { key_status<i>.Curr_Cmd = BTN_RELEASED; ESP_LOGI(TAG, "K% d inactivated",i); } else { } // Record the key pressing status of the previous cycle key_status<i>.Last_Status = key_status<i>.Curr_Status; } } ``` # Effect display <ignore_js_op> <img style="cursor:pointer;" id="aimg_636403" aid="636403" src="static/image/common/none.gif" onclick="zoom(this, this.getAttribute('zoomfile'), 0, 0, '0')" zoomfile="data/attachment/forum/202208/26/182419u1ihkbcb2hs1zjbc.png" file="data/attachment/forum/202208/26/182419u1ihkbcb2hs1zjbc.png" inpost="1" onmouseover="showMenu({'ctrlid':this.id,'pos':'12'})" /> <div class="tip tip_4 aimg_tip" id="aimg_636403_menu" style="position: absolute; display: none" disautofocus="true"> <div class="xs0"> <p><strong>1.png</strong> <em class="xg1">(23.23 KB, downloads: 0)</em></p> <p> <a href="javascript:;" class="loginf" >download attach</a> <a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_636403" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=636403&handlekey=savephoto_636403">save to album</a> </p> <p class="xg1 y">2022-8-26 18:24 上传</p> </div> <div class="tip_horn"></div> </div> </ignore_js_op>

爱吐泡泡的鱼

Master, this is really comprehensive!