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Compatibility row offset for 16 and 20 columns LCD #17

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merged 1 commit into from
Dec 18, 2019
Merged

Compatibility row offset for 16 and 20 columns LCD #17

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18 changes: 16 additions & 2 deletions LiquidTWI2.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -117,6 +117,21 @@ void LiquidTWI2::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
Wire.begin();

uint8_t result;

if (cols == 20 && lines == 4 ) {
_row_offsets [0] = 0x00;
_row_offsets [1] = 0x40;
_row_offsets [2] = 0x14;
_row_offsets [3] = 0x54;
} else{
_row_offsets [0] = 0x00;
_row_offsets [1] = 0x40;
_row_offsets [2] = 0x10;
_row_offsets [3] = 0x50;
}



#if defined(MCP23017)&&defined(MCP23008)
if (_mcpType == LTI_TYPE_MCP23017) {
#endif
Expand Down Expand Up @@ -344,9 +359,8 @@ void LiquidTWI2::setCursor(uint8_t col, uint8_t row)
#ifdef DETECT_DEVICE
if (!_deviceDetected) return;
#endif
int row_offsets[] = { 0x00, 0x40, 0x10, 0x50 };
if ( row > _numlines ) row = _numlines - 1; // we count rows starting w/0
command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
command(LCD_SETDDRAMADDR | (col + _row_offsets[row]));
}

// Turn the display on/off (quickly)
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1 change: 1 addition & 0 deletions LiquidTWI2.h
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Expand Up @@ -196,6 +196,7 @@ class LiquidTWI2 : public Print {
uint8_t _numlines,_currline;
uint8_t _i2cAddr;
uint8_t _backlightInverted;
uint16_t _row_offsets[4];
#ifdef DETECT_DEVICE
uint8_t _deviceDetected;
#endif // DETECT_DEVICE
Expand Down