SegLCD_PCF85176_TempHum.h

Go to the documentation of this file.

#ifndef SEGLCD_PCF85176_TEMPHUM_H
#define SEGLCD_PCF85176_TEMPHUM_H
 
#include <Wire.h>
#include <SegDriver_PCx85.h>
 
class SegLCD_PCF85176_TempHumidity : public SegDriver_PCF85176 {
    public:
        typedef enum {
            LABEL_DEGREE_C = 0x01,
            LABEL_PROC = 0x02,
        } LabelFlags;
 
        SegLCD_PCF85176_TempHumidity(TwoWire& i2c, uint8_t address = DEFAULT_PCF85176_I2C_ADDRESS, uint8_t subaddress = DEFAULT_SUBADDRESS);
        void init() override;
        void clear() override;
        void setBatteryLevel(uint8_t value);
        void setSignalLevel(uint8_t value);
        void setLabels(uint8_t labels);
        void clearLabels(uint8_t labels);
        void setCursor(uint8_t row, uint8_t col) override;
        size_t write(uint8_t ch) override;
 
    private:
        void _setDecimal(uint8_t row, uint8_t col, bool state) override;
        static constexpr uint8_t ADDR_SIGNAL_BATT = 14;
        static constexpr uint8_t ADDR_TEMP_SEGS = 0;
        static constexpr uint8_t ADDR_HUM_SEGS = 8;
 
        static constexpr uint8_t RAM_SIZE = 8;
        static constexpr uint8_t OFFSET_SIGBATT = 7;
        static constexpr uint8_t OFFSET_TEMP = 0;
        static constexpr uint8_t OFFSET_HUM = 4;
 
        static constexpr uint8_t FLAG_MINUS_DISPLAYED = 0x01;
 
        // Display-specific constants
        static constexpr uint8_t TEMP_DIGITS = 4;
        static constexpr uint8_t HUM_DIGITS = 3;
        static constexpr uint8_t TEMP_ROW = 0;
        static constexpr uint8_t HUM_ROW = 1;
 
        // Label column positions (last digit in each row)
        static constexpr uint8_t LABEL_TEMP_COL = TEMP_DIGITS - 1;  // Col 3 for C
        static constexpr uint8_t LABEL_HUM_COL = HUM_DIGITS - 1;    // Col 2 for %
 
        // Decimal configuration for write() flow (dot belongs to previous position).
        // Values are logical cursor ranges passed to _dotWrite().
        static constexpr uint8_t DECIMAL_TOP_MIN_COL = 0;
        static constexpr uint8_t DECIMAL_TOP_MAX_COL = TEMP_DIGITS - 1;
        static constexpr uint8_t DECIMAL_BOTTOM_MIN_COL = 1;
        static constexpr uint8_t DECIMAL_BOTTOM_MAX_COL = HUM_DIGITS - 1;
        static constexpr int8_t DECIMAL_COL_OFFSET = -1;  // -1: dot belongs to previous position
 
        // TempHum specific bit positions
        static constexpr uint8_t DECIMAL_POINT_BIT = 0x08;
        static constexpr uint8_t LABEL_BIT = 0x08;
        static constexpr uint8_t MINUS_SIGN_BIT = 0x08;
 
        // Signal/Battery level constants (TempHum specific)
        static constexpr uint8_t MAX_SIGNAL_BATTERY_LEVEL = 4;
        static constexpr uint8_t SIGNAL_BATTERY_MASK_LOW = 0x0F;
        static constexpr uint8_t SIGNAL_BATTERY_MASK_HIGH = 0xF0;
 
        // Label address offsets
        static constexpr uint8_t TEMP_LABEL_OFFSET = 6;
        static constexpr uint8_t HUM_LABEL_OFFSET = 4;
 
        // Signal/Battery bit patterns (TempHum specific)
        static constexpr uint8_t SIGNAL_LEVEL_BITS[4] = {0x10, 0x20, 0x40, 0x80};
        static constexpr uint8_t BATTERY_LEVEL_BITS[4] = {8, 4, 2, 1};
 
        uint8_t _mapSegments(uint8_t val);
};
#endif