FEATURE: simple class for calibrating and calculating an input

Middlewares/floatpump/Inc/InputChannel.h

@@ -0,0 +1,67 @@
+//
+// Created by robtor on 10.01.23.
+//
+
+#ifndef FLOATPUMP_INPUTCHANNEL_H
+#define FLOATPUMP_INPUTCHANNEL_H
+
+#include <cstdint>
+#include "stm32f4xx_hal.h"
+
+namespace floatpump {
+    namespace io {
+
+        class InputChannel {
+
+        public:
+            InputChannel(ADC_HandleTypeDef *adc, GPIO_TypeDef *gpio, uint16_t port) : m_adc(adc), m_gpio(gpio), m_gpio_port(port) {};
+
+            void poll() {
+                //Enable measuring power
+                HAL_GPIO_WritePin(m_gpio, m_gpio_port, GPIO_PIN_SET);
+                HAL_Delay(m_cooldown);
+
+                uint16_t average = 0;
+
+                for(int i = 0; i < m_avg_size; i++) {
+                    HAL_Delay(m_avg_delay);
+                    HAL_ADC_Start(m_adc);
+                    HAL_ADC_PollForConversion(m_adc, m_avg_delay);
+                    average += HAL_ADC_GetValue(m_adc);
+                }
+
+                m_raw = average / m_avg_size;
+
+                m_percent = ((m_raw - m_lowcalib)*100)/(m_highcalib-m_lowcalib);
+            }
+
+            uint16_t getRaw() {
+                return m_raw;
+            }
+
+            int8_t getPercent() {
+                return m_percent;
+            }
+
+
+        private:
+            const uint16_t m_avg_size = 50;
+            const uint16_t m_avg_delay = 10;
+            const uint16_t m_cooldown = 500;
+
+            uint16_t m_lowcalib = 0;
+            uint16_t m_highcalib = 65535;
+
+            uint16_t m_raw = 0;
+            int8_t m_percent = 0;
+
+            ADC_HandleTypeDef *m_adc;
+            GPIO_TypeDef *m_gpio;
+            uint16_t m_gpio_port;
+
+        };
+
+    } // floatpump
+} // io
+
+#endif //FLOATPUMP_INPUTCHANNEL_H

Middlewares/floatpump/Src/InputChannel.cpp

@@ -0,0 +1,11 @@
+//
+// Created by robtor on 10.01.23.
+//
+
+#include "InputChannel.h"
+
+namespace floatpump {
+    namespace io {
+
+    } // floatpump
+} // io