From d354be10778f41602654d93426631b651853cf59 Mon Sep 17 00:00:00 2001
From: Martin Brodbeck <martin@brodbeck-online.de>
Date: Tue, 31 May 2022 13:53:19 +0200
Subject: [PATCH] relais added

---
 CMakeLists.txt |  2 +-
 gbmanager.cpp  | 11 +++++++++++
 relais.cpp     | 23 +++++++++++++++++++++++
 relais.h       | 18 ++++++++++++++++++
 4 files changed, 53 insertions(+), 1 deletion(-)
 create mode 100644 relais.cpp
 create mode 100644 relais.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d67d624..c567f2d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,7 +23,7 @@ pico_sdk_init()
 
 # Add executable. Default name is the project name, version 0.1
 
-add_executable(gbmanager gbmanager.cpp lcd.cpp ds18b20.cpp)
+add_executable(gbmanager gbmanager.cpp lcd.cpp ds18b20.cpp relais.cpp)
 
 pico_set_program_name(gbmanager "gbmanager")
 pico_set_program_version(gbmanager "0.1")
diff --git a/gbmanager.cpp b/gbmanager.cpp
index 56d99ca..8724de8 100644
--- a/gbmanager.cpp
+++ b/gbmanager.cpp
@@ -8,11 +8,15 @@
 #include "config.h"
 #include "ds18b20.h"
 #include "lcd.h"
+#include "relais.h"
 
+// GPIOs used
 constexpr uint I2C_SDA_PIN = 26;
 constexpr uint I2C_SCL_PIN = 27;
 constexpr uint DS18B20_PIN = 28;
+constexpr uint RELAIS_PIN = 18;
 
+// Custom chars for the LCD
 constexpr char CUSTOM_CHAR_DEG = 0xDF;
 constexpr char CUSTOM_CHAR_AE = 0xE1;
 
@@ -22,11 +26,16 @@ int main() {
     // Enable UART so we can print status output
     stdio_init_all();
 
+    // Initialize the LCD
     auto myLCD = LCD(i2c1, I2C_SDA_PIN, I2C_SCL_PIN);
     myLCD.clear();
 
+    // Initialize the temp sensor
     // DS18B20 ds = DS18B20(pio0, DS18B20_PIN);
 
+    // Initialize the relais
+    Relais relais(RELAIS_PIN);
+
     float temp_act{0};
     float temp_tgt{28.0};
     float temp_diff{0.5};
@@ -56,6 +65,8 @@ int main() {
         }
         isHeating ? heatInfo = ">H<" : heatInfo = "   ";
 
+        relais.activate(isHeating);
+
         lcdText.str("");
         lcdText.clear();
         lcdText.precision(4);
diff --git a/relais.cpp b/relais.cpp
new file mode 100644
index 0000000..185868e
--- /dev/null
+++ b/relais.cpp
@@ -0,0 +1,23 @@
+#include "relais.h"
+
+Relais::Relais(uint gpio) : gpio{gpio} {
+    gpio_set_dir(gpio, true);
+    gpio_init(gpio);
+    off();
+}
+
+void Relais::activate(bool active) {
+    if (active) {
+        gpio_pull_down(gpio);
+    } else {
+        gpio_pull_up(gpio);
+    }
+}
+
+void Relais::on() {
+    activate(true);
+}
+
+void Relais::off() {
+    activate(false);
+}
\ No newline at end of file
diff --git a/relais.h b/relais.h
new file mode 100644
index 0000000..f35fbee
--- /dev/null
+++ b/relais.h
@@ -0,0 +1,18 @@
+#ifndef RELAIS_H
+#define RELAIS_H
+
+#include "pico/stdlib.h"
+#include "hardware/gpio.h"
+
+class Relais {
+    public:
+    Relais(uint gpio);
+    void activate(bool active);
+    void on();
+    void off();
+
+    private:
+    uint gpio;
+};
+
+#endif
\ No newline at end of file