uint16_t Adafruit_STMPE610::readRegister16(uint8_t reg) {
uint16_t x;
if (_CS == -1) {
// use i2c
Wire.beginTransmission(_i2caddr);
Wire.write((byte)reg);
Wire.endTransmission();
Wire.requestFrom(_i2caddr, (byte)2);
x = Wire.read();
x<<=8;
x |= Wire.read();
Wire.endTransmission();
} if (_CLK == -1) {
// hardware SPI
#if defined (SPI_HAS_TRANSACTION)
if (_CLK == -1) SPI.beginTransaction(mySPISettings);
#endif
digitalWrite(_CS, LOW);
spiOut(0x80 | reg);
spiOut(0x00);
x = spiIn();
x<<=8;
x |= spiIn();
digitalWrite(_CS, HIGH);
#if defined (SPI_HAS_TRANSACTION)
if (_CLK == -1) SPI.endTransaction();
#endif
}
//Serial.print("$"); Serial.print(reg, HEX);
//Serial.print(": 0x"); Serial.println(x, HEX);
return x;
}
void SpiLcd::pulseEnable(void) {
bitSet(_spiByte, LCD_SHIFT_ENABLE);
spiOut();
delayMicroseconds(1); // enable pulse must be >450ns
bitClear(_spiByte, LCD_SHIFT_ENABLE);
spiOut();
}
void Adafruit_STMPE610::writeRegister8(uint8_t reg, uint8_t val) {
spi_begin();
CSLow();
spiOut(reg);
spiOut(val);
CSHigh();
spi_end();
}
uint8_t Adafruit_STMPE610::readRegister8(uint8_t reg) {
uint8_t x ;
spi_begin();
CSLow();
spiOut(0x80 | reg);
spiOut(0x00);
x = spiIn();
CSHigh();
spi_end();
return x;
}
uint16_t Adafruit_STMPE610::readRegister16(uint8_t reg) {
uint16_t x;
spi_begin();
CSLow();
spiOut(0x80 | reg);
spiOut(0x00);
x = spiIn();
x<<=8;
x |= spiIn();
CSHigh();
spi_end();
//Serial.print("$"); Serial.print(reg, HEX);
//Serial.print(": 0x"); Serial.println(x, HEX);
return x;
}
void SpiLcd::begin(uint8_t cols, uint8_t lines) {
_numlines = lines;
_currline = 0;
_currpos = 0;
// Set all outputs of shift register to low, this turns the backlight ON.
_spiByte = 0x00;
spiOut();
// The following initialization sequence should be compatible with:
// - Newhaven OLED displays
// - Standard HD44780 or S6A0069 LCD displays
delayMicroseconds(50000); // wait 50 ms just to be sure that the lcd is initialized
write4bits(0x03); //set to 8-bit
delayMicroseconds(50000); // wait > 4.1ms
write4bits(0x03); //set to 8-bit
delayMicroseconds(1000); // wait > 100us
write4bits(0x03); //set to 8-bit
delayMicroseconds(50000); // wait for execution
write4bits(0x02); //set to 4-bit
delayMicroseconds(50000); // wait for execution
command(0x28); // set to 4-bit, 2-line
clear(); // display clear
// Entry Mode Set:
leftToRight();
noAutoscroll();
home();
//noCursor();
display();
}
void Adafruit_STMPE610::writeRegister8(uint8_t reg, uint8_t val) {
if (_CS == -1) {
// use i2c
Wire.beginTransmission(_i2caddr);
Wire.write((byte)reg);
Wire.write(val);
Wire.endTransmission();
} else {
#if defined (SPI_HAS_TRANSACTION)
if (_CLK == -1) SPI.beginTransaction(mySPISettings);
#endif
digitalWrite(_CS, LOW);
spiOut(reg);
spiOut(val);
digitalWrite(_CS, HIGH);
#if defined (SPI_HAS_TRANSACTION)
if (_CLK == -1) SPI.endTransaction();
#endif
}
}
// write either command or data
void SpiLcd::send(uint8_t value, uint8_t mode) {
if(mode){
bitSet(_spiByte, LCD_SHIFT_RS);
}
else{
bitClear(_spiByte, LCD_SHIFT_RS);
}
spiOut();
write4bits(value>>4);
write4bits(value);
}
void SpiLcd::write4bits(uint8_t value) {
_spiByte = (_spiByte & ~LCD_SHIFT_DATA_MASK) | (value << 4);
spiOut();
pulseEnable();
}
