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Make I2C address configurable for HD44780 LCD variations

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Also add a basic README with some pointers on how to connect and configure the LCDs
This commit is contained in:
Tony Corbett G0WFV
2016-06-30 20:10:30 +01:00
parent ef0ebb4d49
commit ce367f73cb
7 changed files with 72 additions and 8 deletions
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7
HD44780.h
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@@ -67,7 +67,7 @@ enum ADAFRUIT_COLOUR {
#define AF_ON LOW
#define AF_OFF HIGH
#define MCP23017 0x20
// #define MCP23017 0x20
#endif
// Define for HD44780 connected via a PCF8574 GPIO extender
@@ -83,13 +83,13 @@ enum ADAFRUIT_COLOUR {
#define AF_D2 (AF_BASE + 6)
#define AF_D3 (AF_BASE + 7)
#define PCF8574 0x27
// #define PCF8574 0x27
#endif
class CHD44780 : public CDisplay
{
public:
CHD44780(unsigned int rows, unsigned int cols, const std::string& callsign, unsigned int dmrid, const std::vector<unsigned int>& pins, bool pwm, unsigned int pwmPin, unsigned int pwmBright, unsigned int pwmDim, bool displayClock, bool utc, bool duplex);
CHD44780(unsigned int rows, unsigned int cols, const std::string& callsign, unsigned int dmrid, const std::vector<unsigned int>& pins, const std::string& i2cAddress, bool pwm, unsigned int pwmPin, unsigned int pwmBright, unsigned int pwmDim, bool displayClock, bool utc, bool duplex);
virtual ~CHD44780();
virtual bool open();
@@ -123,6 +123,7 @@ private:
unsigned int m_d1;
unsigned int m_d2;
unsigned int m_d3;
std::string m_i2cAddress;
bool m_pwm;
unsigned int m_pwmPin;
unsigned int m_pwmBright;