From c50aca8850f065a4194fde19392682e0e9c1343b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=90=D1=80=D1=82=D1=91=D0=BC=20=D0=9D=D0=BE=D0=B2=D0=B8?=
=?UTF-8?q?=D0=BA=D0=BE=D0=B2?= <stud126169@vyatsu.ru>
Date: Sun, 17 Mar 2024 17:25:17 +0000
Subject: [PATCH] =?UTF-8?q?=D0=94=D0=BE=D0=B1=D0=B0=D0=B2=D0=B8=D1=82?=
=?UTF-8?q?=D1=8C=20DHT=5F22.cpp?=
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---
DHT_22.cpp | 146 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 146 insertions(+)
create mode 100644 DHT_22.cpp
diff --git a/DHT_22.cpp b/DHT_22.cpp
new file mode 100644
index 0000000..04340e9
--- /dev/null
+++ b/DHT_22.cpp
@@ -0,0 +1,146 @@
+#include "DHT_22.h"
+#include <avr/io.h>
+
+//volatile unsigned char interrupt_flag;
+int dht_save_time_id;
+// Флаг прерывания
+volatile unsigned char interrupt_flag = 1;
+bool dht_done = false;
+int dht_check_icp;
+
+uint8_t dht_state, dht_last_state;
+int T1time, dPos, dNum;
+float temperature, humidity;
+float last_temperature, last_humidity;
+
+unsigned char data[5];
+uint8_t dt[48];
+uint8_t dtcnt;
+bool dht_check_act = false;
+
+// Таймер для задержки
+volatile unsigned int timer_counter = 0;
+int dht_en_timer = 0;
+
+//----------------------------------------------------------------------------------------------------
+bool dht_check( void )
+{
+ bool valid_data = false;
+
+ if (dht_check_act) {
+ dht_check_act = false;
+//-----[ 01. Старт, выжидание 18мс ]-----
+ if ( interrupt_flag == 1)
+ {
+ // Запускаем таймер на 18 мс посылка start на dht
+// Serial.print("Start DHT -> ");
+
+ DHT_DDR |= (1 << DHT_BIT); // Пин как выход
+ DHT_PORT &= ~(1 << DHT_BIT); // Выход ноль
+ TCNT1 = 0;
+ OCR1A = 288;
+ TCCR1A = 0b00000000;
+ TIMSK1 = 0b00000010;
+ TCCR1B = 0b00000101;
+ }
+
+ if ( interrupt_flag == 2)
+ {
+ DHT_PORT |= (1 << DHT_BIT);
+ DHT_DDR &= ~(1 << DHT_BIT);
+ dht_save_time_id = 0;
+ TCNT1 = 0;
+ OCR1A = 10000;
+ TCCR1A = 0b00000000;
+ TCCR1B = 0b10000001;
+ TIFR1 = 0b00000000;
+ TIMSK1 = 0b00100010;
+ dPos = 7;
+ dNum = 0;
+ dht_last_state = false;
+ }
+ // Вычисляем температуру и влажность
+ if ( dht_done )
+ {
+ dht_done = false;
+ temperature = (data[3] * 0.1) + ((data[2] & 0b01111111) * 25.6)/6;
+ if (data[2] & 0b10000000) temperature *= -1;
+ humidity = (data[1] * 0.1) + (data[0] * 25.6)/50;
+ valid_data = true;
+
+ }
+ }
+ return valid_data;
+}
+
+float dht_humidity(){
+ return humidity;
+}
+
+float dht_temperature(){
+ return temperature;
+}
+
+void T1_CAPT(){
+ TCNT1 = 0;
+ dht_save_time_id++;
+
+ if ( dht_save_time_id == 43 )
+ {
+
+ }
+
+ if ( dht_save_time_id > 3 )
+ {
+ dt[dtcnt] = ICR1<<8;
+ dtcnt++;
+ if ( ICR1<1500 )
+ {
+ data[dNum] &= ~(1<<dPos);
+ } // 0
+ else
+ {
+ data[dNum] |= (1<<dPos);
+ } // 1
+ dPos--;
+ if ( dPos < 0)
+ {
+ dPos=7; dNum++;
+ }
+ }
+ if ( dht_save_time_id == 42 )
+ {
+ interrupt_flag++;
+ dht_check_act = true;
+ dht_done = true;
+
+ DHT_DDR |= (1 << DHT_BIT); // Пин как выход
+ DHT_PORT |= (1 << DHT_BIT); // Выход HIGH
+ }
+}
+
+void T0_CA(){
+ TCNT0 = 0;
+ dht_en_timer++;
+ if ( dht_en_timer >= 65)
+ {
+ dht_en_timer =0;
+ dht_done = false;
+ dtcnt=0;
+ interrupt_flag = 1;
+ dht_check_act = true;
+ DHT_DDR |= (1 << DHT_BIT); // Пин как выход
+ DHT_PORT |= (1 << DHT_BIT); // Выход HIGH
+ dht_save_time_id = 0;
+ }
+}
+
+void T1_CA(){
+ TCNT1 = 0;
+ dht_check_act = true;
+ TCCR1B = 0b00000000;
+ if ( interrupt_flag < 3 )
+ {
+ interrupt_flag++;
+ }
+}