SPI 제어 방식 1.8" 칼라 TFTLCD 모듈로 지원 해상도는 128x160이며 AVR, PIC, MSP430, STM32 등의 CPU에서 SPI 신호 CLK, MISO, MOSI, RST와 명령어/데이타(C/D) 제어신호만으로 LCD를 구동할 수 있습니다. SD카드 리드/라이트용 신호 I/F가 별도로 지원됩니다. 

• 지원해상도: 128 x 160
• 구동 IC: ST7735S
• 제어방식: SPI 인터페이스
• SD 카드 슬롯 지원 (별도의 I/F 신호선)
• 노키아 5110 LCD I/F 호환

• SDO(MISO): 시리얼 데이타 출력(Serial clock output)
• LED: LED 표시(3.3V 입력)
• SCK: 시리얼 클럭 입력(Serial clock input)
• SDI(MOSI): 시리얼 데이타 입력 (Serial data input)
• D/C:  데이타/명령어 선택(Data/Command selection)
• RST: 리셋(Reset, Low level active)
• CS: 칩셀렉트(Chip Selection, Low level active)
• GND: 전원 그라운드
• VCC: 3.3V 전원 입력

<STM32 사용시>

/********************************************

TFT_CS  STM32_PA4

RESET   STM32_PB0

TFT_A0  STM32_PC4

TFT_SDA STM32_SPI1_MOSI

TFT_SCK STM32_SPI1_SCK

********************************************/

u8 SPI_WriteByte(SPI_TypeDef* SPIx,u8 Byte)

{

    while((SPIx->SR&SPI_I2S_FLAG_TXE)==RESET);

    SPIx->DR=Byte;

    while((SPIx->SR&SPI_I2S_FLAG_RXNE)==RESET);

    return SPIx->DR;               

} 

void LCD_Writ_Bus(u8 da)   

{

    SPI_WriteByte(SPI1,da);

} 

void LCD_WR_DATA8(u8 da) 

{

    LCD_RS_SET;     //RS=1

    LCD_Writ_Bus(da);

}  

void LCD_WR_DATA(u16 da)

{

    LCD_RS_SET;

    LCD_Writ_Bus(da>>8);

    LCD_Writ_Bus(da);

}  

void LCD_WR_REG(u8 da) 

{

    LCD_RS_RESET;

    LCD_Writ_Bus(da);

}

void LCD_WR_REG_DATA(u16 reg,int da)

{

    LCD_WR_REG(reg);

    LCD_WR_DATA(da);

}

<초기화코드>

void lcd_initial()
{

   reset=0;
   delay(100);
   reset=1;
   delay(100);

//------------------------------------------------------------------//  
//-------------------Software Reset-------------------------------//
write_command(0x11);//Sleep out
 delay(120);
 //ST7735R Frame Rate
 write_command(0xB1);
 write_data(0x01);
 write_data(0x2C);
 write_data(0x2D);
 write_command(0xB2);
 write_data(0x01);
 write_data(0x2C);
 write_data(0x2D);
 write_command(0xB3);
 write_data(0x01);
 write_data(0x2C);
 write_data(0x2D);
 write_data(0x01);
 write_data(0x2C);
 write_data(0x2D);
 //------------------------------------End ST7735R Frame Rate-----------------------------------------//
 write_command(0xB4);//Column inversion
 write_data(0x07);
 //------------------------------------ST7735R Power Sequence-----------------------------------------//
 write_command(0xC0);
 write_data(0xA2);
 write_data(0x02);
 write_data(0x84);
 write_command(0xC1);
 write_data(0xC5);
 write_command(0xC2);
 write_data(0x0A);
 write_data(0x00);
 write_command(0xC3);
 write_data(0x8A);
 write_data(0x2A);
 write_command(0xC4);
 write_data(0x8A);
 write_data(0xEE);
 //---------------------------------End ST7735R Power Sequence-------------------------------------//
 write_command(0xC5);//VCOM
 write_data(0x0E);
 write_command(0x36);//MX, MY, RGB mode
 write_data(0xC8);
 //------------------------------------ST7735R Gamma Sequence-----------------------------------------//
 write_command(0xe0);
 write_data(0x02);
 write_data(0x1c);
 write_data(0x07);
 write_data(0x12);
 write_data(0x37);
 write_data(0x32);
 write_data(0x29);
 write_data(0x2d);
 write_data(0x29);
 write_data(0x25);
 write_data(0x2b);
 write_data(0x39);
 write_data(0x00);
 write_data(0x01);
 write_data(0x03);
 write_data(0x10);
 write_command(0xe1);
 write_data(0x03);
 write_data(0x1d);
 write_data(0x07);
 write_data(0x06);
 write_data(0x2e);
 write_data(0x2c);
 write_data(0x29);
 write_data(0x2d);
 write_data(0x2e);
 write_data(0x2e);
 write_data(0x37);
 write_data(0x3f);
 write_data(0x00);
 write_data(0x00);
 write_data(0x02);
 write_data(0x10);
  write_command(0x2A);
   write_data(0x00);
   write_data(0x02);
   write_data(0x00);
   write_data(0x81);
  
   write_command(0x2B);
   write_data(0x00);
   write_data(0x01);
   write_data(0x00);
   write_data(0xA0);
 //------------------------------------End ST7735R Gamma Sequence-----------------------------------------//

    write_command(0x3A); 
    write_data(0x05);  
 //write_command(0x3A);//65k mode
 //write_data(0x05);
 write_command(0x29);//Display on
}