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prenticedavid
2016-03-15 21:03:51 +00:00
parent 49155238a9
commit f8ae9b7037
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examples/LCD_ID_readreg/LCD_ID_readreg.ino Normal file
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// adapted from LCD_ID_Reader from http://misc.ws/lcd_information
// controllers either read as 16-bit or as a sequence of 8-bit values
//-- Arduino UNO or Mega 2560 Plugged as shield
#define LCD_RST A4
#define LCD_CS A3
#define LCD_RS A2
#define LCD_WR A1
#define LCD_RD A0
#define LCD_D0 8
#define LCD_D1 9
#define LCD_D2 2
#define LCD_D3 3
#define LCD_D4 4
#define LCD_D5 5
#define LCD_D6 6
#define LCD_D7 7
void setup()
{
Serial.begin(9600);
while (!Serial) ;
Serial.println("Read Registers on MCUFRIEND UNO shield");
Serial.println("controllers either read as single 16-bit");
Serial.println("e.g. the ID is at readReg(0)");
Serial.println("or as a sequence of 8-bit values");
Serial.println("in special locations (first is dummy)");
Serial.println("");
lcdInit();
lcdReset(); //ensures that controller is in default state
readReg(0x00, 2, "ID: ILI9320, ILI9325, ILI9335, ...");
readReg(0x04, 4, "Manufacturer ID");
readReg(0x09, 5, "Status Register");
readReg(0x61, 2, "RDID1 HX8347-G");
readReg(0x62, 2, "RDID2 HX8347-G");
readReg(0x63, 2, "RDID3 HX8347-G");
readReg(0x64, 2, "RDID1 HX8347-A");
readReg(0x65, 2, "RDID2 HX8347-A");
readReg(0x66, 2, "RDID3 HX8347-A");
readReg(0x67, 2, "RDID Himax HX8347-A");
readReg(0x70, 2, "Panel Himax HX8347-A");
readReg(0xA1, 5, "RD_DDB SSD1963");
readReg(0xB0, 2, "RGB Interface Signal Control");
readReg(0xB4, 2, "Inversion Control");
readReg(0xB6, 5, "Display Control");
readReg(0xB7, 2, "Entry Mode Set");
readReg(0xBF, 6, "ILI9481, HX8357-B");
readReg(0xC0, 6, "Panel Control");
readReg(0xCC, 2, "Panel Control");
readReg(0xD0, 3, "Power Control");
readReg(0xD2, 5, "NVM Read");
readReg(0xD3, 4, "ILI9341, ILI9488");
readReg(0xDA, 2, "RDID1");
readReg(0xDB, 2, "RDID2");
readReg(0xDC, 2, "RDID3");
readReg(0xEF, 6, "ILI9327");
readReg(0xF2, 12, "Adjust Control 2");
readReg(0xF6, 4, "Interface Control");
}
void loop()
{
// put your main code here, to run repeatedly:
}
void printhex(uint8_t val)
{
if (val < 0x10) Serial.print("0");
Serial.print(val, HEX);
}
void readReg(uint16_t reg, uint8_t n, const char *msg)
{
uint8_t val8;
lcdReset();
lcdSetWriteDir();
/*
lcdWriteCommand(0xF6);
lcdWriteData(0x01);
lcdWriteData(0x01);
lcdWriteData(0x03);
*/
lcdWriteCommand(reg);
Serial.print("reg(0x");
printhex(reg >> 8);
printhex(reg);
Serial.print(")");
lcdSetReadDir();
while (n--) {
val8 = lcdReadData8();
Serial.print(" ");
printhex(val8);
}
lcdSetWriteDir();
Serial.print("\t");
Serial.println(msg);
}
void lcdInit()
{
pinMode(LCD_CS, OUTPUT);
digitalWrite(LCD_CS, HIGH);
pinMode(LCD_RS, OUTPUT);
digitalWrite(LCD_RS, HIGH);
pinMode(LCD_WR, OUTPUT);
digitalWrite(LCD_WR, HIGH);
pinMode(LCD_RD, OUTPUT);
digitalWrite(LCD_RD, HIGH);
pinMode(LCD_RST, OUTPUT);
digitalWrite(LCD_RST, HIGH);
}
void lcdReset()
{
digitalWrite(LCD_RST, LOW);
delay(2);
digitalWrite(LCD_RST, HIGH);
delay(10); //allow controller to re-start
}
void lcdWrite8(uint16_t data)
{
digitalWrite(LCD_D0, data & 1);
digitalWrite(LCD_D1, (data & 2) >> 1);
digitalWrite(LCD_D2, (data & 4) >> 2);
digitalWrite(LCD_D3, (data & 8) >> 3);
digitalWrite(LCD_D4, (data & 16) >> 4);
digitalWrite(LCD_D5, (data & 32) >> 5);
digitalWrite(LCD_D6, (data & 64) >> 6);
digitalWrite(LCD_D7, (data & 128) >> 7);
}
uint16_t lcdRead8()
{
uint16_t result = digitalRead(LCD_D7);
result <<= 1;
result |= digitalRead(LCD_D6);
result <<= 1;
result |= digitalRead(LCD_D5);
result <<= 1;
result |= digitalRead(LCD_D4);
result <<= 1;
result |= digitalRead(LCD_D3);
result <<= 1;
result |= digitalRead(LCD_D2);
result <<= 1;
result |= digitalRead(LCD_D1);
result <<= 1;
result |= digitalRead(LCD_D0);
return result;
}
void lcdSetWriteDir()
{
pinMode(LCD_D0, OUTPUT);
pinMode(LCD_D1, OUTPUT);
pinMode(LCD_D2, OUTPUT);
pinMode(LCD_D3, OUTPUT);
pinMode(LCD_D4, OUTPUT);
pinMode(LCD_D5, OUTPUT);
pinMode(LCD_D6, OUTPUT);
pinMode(LCD_D7, OUTPUT);
}
void lcdSetReadDir()
{
pinMode(LCD_D0, INPUT);
pinMode(LCD_D1, INPUT);
pinMode(LCD_D2, INPUT);
pinMode(LCD_D3, INPUT);
pinMode(LCD_D4, INPUT);
pinMode(LCD_D5, INPUT);
pinMode(LCD_D6, INPUT);
pinMode(LCD_D7, INPUT);
}
void lcdWriteData(uint16_t data)
{
lcdSetWriteDir();
digitalWrite(LCD_CS, LOW);
digitalWrite(LCD_RS, HIGH);
digitalWrite(LCD_RD, HIGH);
digitalWrite(LCD_WR, HIGH);
lcdWrite8(data >> 8);
digitalWrite(LCD_WR, LOW);
delayMicroseconds(10);
digitalWrite(LCD_WR, HIGH);
lcdWrite8(data);
digitalWrite(LCD_WR, LOW);
delayMicroseconds(10);
digitalWrite(LCD_WR, HIGH);
digitalWrite(LCD_CS, HIGH);
}
void lcdWriteCommand(uint16_t command)
{
lcdSetWriteDir();
digitalWrite(LCD_CS, LOW);
digitalWrite(LCD_RS, LOW);
digitalWrite(LCD_RD, HIGH);
digitalWrite(LCD_WR, HIGH);
lcdWrite8(command >> 8);
digitalWrite(LCD_WR, LOW);
delayMicroseconds(10);
digitalWrite(LCD_WR, HIGH);
lcdWrite8(command);
digitalWrite(LCD_WR, LOW);
delayMicroseconds(10);
digitalWrite(LCD_WR, HIGH);
digitalWrite(LCD_CS, HIGH);
}
uint8_t lcdReadData8()
{
uint8_t result;
lcdSetReadDir();
digitalWrite(LCD_CS, LOW);
digitalWrite(LCD_RS, HIGH);
digitalWrite(LCD_RD, HIGH);
digitalWrite(LCD_WR, HIGH);
digitalWrite(LCD_RD, LOW);
delayMicroseconds(10);
result = lcdRead8();
digitalWrite(LCD_RD, HIGH);
delayMicroseconds(10);
return result;
}
uint16_t lcdReadData16()
{
uint16_t result;
result = lcdReadData8() << 8;
result |= lcdReadData8();
return result;
}
void lcdWriteRegister(uint16_t addr, uint16_t data)
{
lcdWriteCommand(addr);
lcdWriteData(data);
}