MBED下的SPI驱动TFT的程序

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一花一世界003 发布时间：2015-2-2 18:54

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花了一下午时间写完并且测试我的程序，现在共享出来补给一下
#include "mbed.h"

SPI device(SPI_MOSI, SPI_MISO, SPI_SCK);
QQæªå¾20150202184406.png

其中SPI_MOSI对应你的开发板上面的默认的MOSI,MISO,SCK引脚
QQæªå¾20150202184739.png

//这是我的板子上面的引脚分布图，SPI协议引脚都有在上面
typedef unsigned char uchar;
typedef unsigned int uint;
DigitalOut rs(D10);
//RS,是这种液晶屏幕的一个重要引脚，也常常标记为PC
DigitalOut cs(D9);
//CS与片选使能还是有一定区别
DigitalOut reset(D8);
//RESET复位引脚
uchar bitdata;
void  delay(uint t);

延时函数
void delay(uint time)
{
uint i,j;
  for(i=0;i<time;i++)
for(j=0;j<2500;j++);
}
写命令
void  write_command(uchar c)
{
cs=0;
rs=0;
bitdata=c;
device.write(bitdata);
cs=1;
}
写数据
void  write_data(uchar d)
{
cs=0;
rs=1;
bitdata=d;
device.write(bitdata);
cs=1;
}
写16位数据
void wr_com16(unsigned char i,unsigned char j)
{
  cs=0;
  rs=1;
  bitdata=i;
device.write(bitdata);
cs=1;
  cs=0;
rs=1;
bitdata=j;
device.write(bitdata);
cs=1;

}
写命令与数据
void LCD_Write_COM_DATA(uchar i,uint j)
{
write_command(i);
wr_com16(j>>8,j);
}

初始化液晶屏幕
void lcd_initial()
{
reset=0;
delay(100);
reset=1;
delay(100);
LCD_Write_COM_DATA(0x10, 0x0000); // Set SAP,DSTB,STB
LCD_Write_COM_DATA(0x11, 0x0000); // Set APON,PON,AON,VCI1EN,VC
LCD_Write_COM_DATA(0x12, 0x0000); // Set BT,DC1,DC2,DC3
LCD_Write_COM_DATA(0x13, 0x0000); // Set GVDD
LCD_Write_COM_DATA(0x14, 0x0000); // Set VCOMH/VCOML voltage
delay(40); // Delay 20 ms

// Please follow this power on sequence
LCD_Write_COM_DATA(0x11, 0x0018); // Set APON,PON,AON,VCI1EN,VC
LCD_Write_COM_DATA(0x12, 0x1121); // Set BT,DC1,DC2,DC3
LCD_Write_COM_DATA(0x13, 0x0063); // Set GVDD
LCD_Write_COM_DATA(0x14, 0x3961); // Set VCOMH/VCOML voltage
LCD_Write_COM_DATA(0x10, 0x0800); // Set SAP,DSTB,STB
delay(10); // Delay 10 ms
LCD_Write_COM_DATA(0x11, 0x1038); // Set APON,PON,AON,VCI1EN,VC
delay(30); // Delay 30 ms

LCD_Write_COM_DATA(0x02, 0x0100); // set 1 line inversion

//R01H:SM=0,GS=0,SS=1 (for details,See the datasheet of ILI9225)
LCD_Write_COM_DATA(0x01, 0x011C); // set the display line number and display direction
//R03H:BGR=1,ID0=1,ID1=1,AM=0 (for details,See the datasheet of ILI9225)
LCD_Write_COM_DATA(0x03, 0x1030); // set GRAM write direction.

LCD_Write_COM_DATA(0x07, 0x0000); // Display off
LCD_Write_COM_DATA(0x08, 0x0808); // set the back porch and front porch
LCD_Write_COM_DATA(0x0B, 0x1100); // set the clocks number per line
LCD_Write_COM_DATA(0x0C, 0x0000); // CPU interface
LCD_Write_COM_DATA(0x0F, 0x0501); // Set Osc
LCD_Write_COM_DATA(0x15, 0x0020); // Set VCI recycling
LCD_Write_COM_DATA(0x20, 0x0000); // RAM Address
LCD_Write_COM_DATA(0x21, 0x0000); // RAM Address

//------------------------ Set GRAM area --------------------------------//
LCD_Write_COM_DATA(0x30, 0x0000);
LCD_Write_COM_DATA(0x31, 0x00DB);
LCD_Write_COM_DATA(0x32, 0x0000);
LCD_Write_COM_DATA(0x33, 0x0000);
LCD_Write_COM_DATA(0x34, 0x00DB);
LCD_Write_COM_DATA(0x35, 0x0000);
LCD_Write_COM_DATA(0x36, 0x00AF);
LCD_Write_COM_DATA(0x37, 0x0000);
LCD_Write_COM_DATA(0x38, 0x00DB);
LCD_Write_COM_DATA(0x39, 0x0000);

// ---------- Adjust the Gamma 2.2 Curve -------------------//
LCD_Write_COM_DATA(0x50, 0x0603);
LCD_Write_COM_DATA(0x51, 0x080D);
LCD_Write_COM_DATA(0x52, 0x0D0C);
LCD_Write_COM_DATA(0x53, 0x0205);
LCD_Write_COM_DATA(0x54, 0x040A);
LCD_Write_COM_DATA(0x55, 0x0703);
LCD_Write_COM_DATA(0x56, 0x0300);
LCD_Write_COM_DATA(0x57, 0x0400);
LCD_Write_COM_DATA(0x58, 0x0B00);
LCD_Write_COM_DATA(0x59, 0x0017);

LCD_Write_COM_DATA(0x0F, 0x0701); // Vertical RAM Address Position
LCD_Write_COM_DATA(0x07, 0x0012); // Vertical RAM Address Position
delay(50); // Delay 50 ms
LCD_Write_COM_DATA(0x07, 0x1017); // Vertical RAM Address Position

}
设置显示位置的命令
void addset(unsigned int x,unsigned int y)
{
LCD_Write_COM_DATA(0x20,x);
  //write_command(0x20);
// LCD_Write_COM_DATA(0x36,x);
  //wr_com16(x>>8,x);
  LCD_Write_COM_DATA(0x21,y);
  //write_command(0x21);
// LCD_Write_COM_DATA(0x36,x);
  //wr_com16(y>>8,y);
write_command(0x22);
}
显示区域设置命令
void Lcd_SetRegion(uchar xStar, uchar yStar,uchar xEnd,uchar yEnd)
{

LCD_Write_COM_DATA(0x36,xEnd);
LCD_Write_COM_DATA(0x37,xStar);
LCD_Write_COM_DATA(0x38,yEnd);
LCD_Write_COM_DATA(0x39,yStar);
LCD_Write_COM_DATA(0x20,xStar);
LCD_Write_COM_DATA(0x21,yStar);

write_command(0x22);
}
屏幕清除命令
void Lcd_Clear(uchar DH,uchar DL)
{
unsigned int i,m;
Lcd_SetRegion(0,0,175,219);
for(i=0;i<175;i++)
for(m=0;m<219;m++)
{
      wr_com16(DH,DL);
}
}

int main() {
lcd_initial();
Lcd_Clear(0x07,0xe0);//绿色
/*RGB
#define RED    0xf800
#define GREEN 0x07e0
#define BLUE 0x001f
#define WHITE 0xffff
#define BLACK 0x0000
#define YELLOW  0xFFE0
#define GRAY0 0xEF7D
#define GRAY1 0x8410
#define GRAY2 0x4208

*/
while(1);
{}
}