From d39ab9c0644c2e98a497f698c45e732efb2dcc0d Mon Sep 17 00:00:00 2001
From: Eggert Jung <eggert.s.jung@wischhof13.de>
Date: Sun, 29 Dec 2019 23:38:18 +0100
Subject: [PATCH] turning off and on via switch works

---
 main/main.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 56 insertions(+), 10 deletions(-)

diff --git a/main/main.c b/main/main.c
index e421049..8a24be2 100644
--- a/main/main.c
+++ b/main/main.c
@@ -7,8 +7,9 @@
 #include "esp_event.h"
 #include "esp_log.h"
 #include "nvs_flash.h"
-#include <esp_http_server.h>
 #include "driver/gpio.h"
+#include "driver/ledc.h"
+#include <esp_http_server.h>
 
 #define WIFI_SSID "AndroidAP"
 #define WIFI_PASS "uyts6533"
@@ -22,6 +23,23 @@ static EventGroupHandle_t wifi_event_group;
 const int CONNECTED_BIT = BIT0;
 static xQueueHandle gpio_evt_queue = NULL;
 
+ledc_timer_config_t ledc_timer = {
+    .duty_resolution = LEDC_TIMER_13_BIT, // resolution of PWM duty
+    .freq_hz = 5000,                      // frequency of PWM signal
+    .speed_mode = LEDC_LOW_SPEED_MODE,           // timer mode
+    .timer_num = LEDC_TIMER_1,            // timer index
+    .clk_cfg = LEDC_AUTO_CLK,              // Auto select the source clock
+};
+ledc_channel_config_t ledc_channel =
+{
+    .channel    = LEDC_CHANNEL_0,
+    .duty       = 0,
+    .gpio_num   = 5,
+    .speed_mode = LEDC_LOW_SPEED_MODE,
+    .hpoint     = 0,
+    .timer_sel  = LEDC_TIMER_1
+};
+
 static char* resp_str ="\
 		<input type=\"submit\" name=\"lamp_state\" onclick=\"sendState(this.value)\" value=\"ON\"> \
 		<input type=\"submit\" name=\"lamp_state\" onclick=\"sendState(this.value)\" value=\"OFF\"> \
@@ -58,6 +76,37 @@ static void IRAM_ATTR gpio_isr_handler(void* arg)
     xQueueSendFromISR(gpio_evt_queue, &gpio_num, NULL);
 }
 
+static void button_debounce_task(void* arg){
+    static uint8_t debounce_active;
+
+    if(!debounce_active){
+        debounce_active = 1;
+        printf("debounce active\n");
+        vTaskDelay(50 / portTICK_RATE_MS);
+        if(gpio_get_level(17)==0){
+            led_state^=1;
+        }
+        debounce_active = 0;
+    }
+    vTaskDelete( NULL );
+}
+
+static void led_task(void* arg)
+{
+    printf("started led task!");
+    for(;;){
+        if(led_state){
+            ledc_set_duty(ledc_channel.speed_mode, ledc_channel.channel, 1<<11);
+            ledc_update_duty(ledc_channel.speed_mode, ledc_channel.channel);
+        }
+        else{
+            ledc_set_duty(ledc_channel.speed_mode, ledc_channel.channel, 0);
+            ledc_update_duty(ledc_channel.speed_mode, ledc_channel.channel);
+        }
+        vTaskDelay(10 / portTICK_RATE_MS);
+    }
+}
+
 static void gpio_task(void* arg)
 {
     printf("GPIO task started\n");
@@ -65,17 +114,9 @@ static void gpio_task(void* arg)
     for(;;) {
         if(xQueueReceive(gpio_evt_queue, &io_num, portMAX_DELAY)) {
             printf("GPIO[%d] intr, val: %d\n", io_num, gpio_get_level(io_num));
+            xTaskCreate(&button_debounce_task, "button_debounce_task", 2048, NULL, 10, NULL);
         }
     }
-    led_state^=1;
-    if(led_state){
-        ledc_set_duty(ledc_channel.speed_mode, ledc_channel.channel, 1<<11);
-        ledc_update_duty(ledc_channel.speed_mode, ledc_channel.channel);
-    }
-    else{
-        ledc_set_duty(ledc_channel.speed_mode, ledc_channel.channel, 0);
-        ledc_update_duty(ledc_channel.speed_mode, ledc_channel.channel);
-    }
 }
 
 // Wifi event handler
@@ -106,6 +147,11 @@ static esp_err_t event_handler(void *ctx, system_event_t *event)
 // Main application
 void app_main()
 {
+    ledc_timer_config(&ledc_timer);
+    ledc_channel_config(&ledc_channel);
+
+    xTaskCreate(&led_task, "led_task", 2048, NULL, 5, NULL);
+
     gpio_config_t io_conf;
     io_conf.intr_type = GPIO_PIN_INTR_NEGEDGE;
     io_conf.pin_bit_mask = (1ULL<<17);