SAM4N控制TFT2.6彩屏求解？

昱枫 · 发表于 2013-11-1 18:32:29

      之前用过完51单片机写过一些有关TFT彩屏的程序，本想在这里移植到SAM4N的开发板上，不过不知道为啥就是显示不了，

  不过51是用两个8位端口给彩屏发送数据或者指令，用来初始化，
void LCD_Writ_Bus(char VH,char VL) //并行数据写入函数
{
LCD_DataPortH=VH;    //高位P1口
LCD_DataPortL=VL;    //低位P0口
LCD_WR=0;
LCD_WR=1;
}

而我用SAM4N的板子是将其直接改为串行传送数据，就是增加 2 个74hc595 IC，这样只需要三个IO口来发送数据给彩屏了

void HC595SendData(unsigned int SendVal)
{
unsigned char i;

for(i=0;i<16;i++)
{
   if(((SendVal<<i)&0x8000)==0x8000)
   {
         SET_MOSIO;// MOSIO=1; //set dataline high  0X8000  最高位与SendVal左移的最高位进行逻辑运算
   }
else
   {
   CLR_MOSIO; //MOSIO=0;    // 如果为真 MOSIO = 1
   }

CLR_S_CLK;//S_CLK=0;
//NOP();
//NOP();
for(char j=2;j>0;j--);
SET_S_CLK;//S_CLK=1;
}

CLR_R_CLK;//R_CLK=0; //set dataline low
//NOP();
//NOP();
for(char k=2;k>0;k--);
SET_R_CLK;//R_CLK=1; //片选

}

将上面相应的程序改为

void LCD_Writ_Bus(unsigned int data) //并行数据写入函数
{
//LCD_DataPortH=VH;    //高位P1口
//LCD_DataPortL=VL;    //低位P0口

HC595SendData(data);
//delay_ms(1);
Clr_Wr;
Set_Wr;
}
这样理论上就实现相应的控制，可是初始化程序就是驱动不了彩屏，求解？
单步运行时发现，这里将74HC595的输出端口接了16个LED共阳极的，单步调试确实数据没有问题。

这是相应的彩屏驱动程序：

#ifndef TFT_26_DRIVER_H_
#define TFT_26_DRIVER_H_

#include "asf.h"

#define uchar unsigned char
#define uint unsigned int

//#define  LCD_DataPortH P5OUT //高8位数据口,8位模式下只使用高8位
//#define  LCD_DataPortL P2OUT    //低8位数据口 ,8位模式下低8位可以不接线

//sbit LCD_REST  = P3^3; //RST 引脚定义 1.1
//sbit LCD_RD =  P3^2;    //RD  引脚定义  1.2
//sbit LCD_WR =  P2^5;    //WR  引脚定义  1.4
//sbit LCD_RS =  P2^6;    //RS  引脚定义  1.5
//sbit LCD_CS =  P2^7;    //CS  引脚定义  1.3

//#define LCD_ctrl_DIR  P1DIR
//#define LCD_Port    P1OUT

#define LCD_CS       PIO_PA25_IDX // BIT3
#define LCD_RESET    PIO_PA21_IDX //BIT1
#define LCD_RS       PIO_PA24_IDX //BIT5
#define LCD_RD       PIO_PA22_IDX //BIT2
#define LCD_WR       PIO_PA23_IDX //BIT4

////595senddata
#define MOSIO          PIO_PA11_IDX
#define R_CLK          PIO_PA12_IDX
#define S_CLK          PIO_PA13_IDX
//ioport_set_pin_level(PIO_PA21_IDX, IOPORT_PIN_LEVEL_HIGH);
//ioport_set_pin_dir(PIO_PA17_IDX, IOPORT_DIR_OUTPUT);
//ioport_set_pin_level(PIO_PA17_IDX, IOPORT_PIN_LEVEL_LOW);

#define Set_Cs       do{ioport_set_pin_level(LCD_CS, IOPORT_PIN_LEVEL_HIGH);}while(0)
#define Set_Rst       do{ioport_set_pin_level(LCD_RESET, IOPORT_PIN_LEVEL_HIGH);}while(0)
#define Set_Rs       do{ioport_set_pin_level(LCD_RS, IOPORT_PIN_LEVEL_HIGH);}while(0)
#define Set_nRd       do{ioport_set_pin_level(LCD_RD, IOPORT_PIN_LEVEL_HIGH);}while(0)
#define Set_Wr       do{ioport_set_pin_level(LCD_WR, IOPORT_PIN_LEVEL_HIGH);}while(0)

#define Clr_Cs       do{ioport_set_pin_level(LCD_CS, IOPORT_PIN_LEVEL_LOW);}while(0)
#define Clr_Rst       do{ioport_set_pin_level(LCD_RESET, IOPORT_PIN_LEVEL_LOW);}while(0)
#define Clr_Rs       do{ioport_set_pin_level(LCD_RS, IOPORT_PIN_LEVEL_LOW);}while(0)
#define Clr_nRd       do{ioport_set_pin_level(LCD_RD, IOPORT_PIN_LEVEL_LOW);}while(0)
#define Clr_Wr       do{ioport_set_pin_level(LCD_WR, IOPORT_PIN_LEVEL_LOW);}while(0)

#define  LCD_SIZE_X 240
#define  LCD_SIZE_Y 320

//ioport_set_pin_level(PIO_PA21_IDX, IOPORT_PIN_LEVEL_HIGH);
//ioport_set_pin_dir(PIO_PA17_IDX, IOPORT_DIR_OUTPUT);
//ioport_set_pin_level(PIO_PA17_IDX, IOPORT_PIN_LEVEL_LOW);
#define SET_MOSIO  do {ioport_set_pin_level(MOSIO, IOPORT_PIN_LEVEL_HIGH);} while (0)
#define CLR_MOSIO  do {ioport_set_pin_level(MOSIO, IOPORT_PIN_LEVEL_LOW);} while (0)
#define SET_R_CLK  do {ioport_set_pin_level(R_CLK, IOPORT_PIN_LEVEL_HIGH);} while (0)
#define CLR_R_CLK  do {ioport_set_pin_level(R_CLK, IOPORT_PIN_LEVEL_LOW);} while (0)
#define SET_S_CLK  do {ioport_set_pin_level(S_CLK, IOPORT_PIN_LEVEL_HIGH);} while (0)
#define CLR_S_CLK  do {ioport_set_pin_level(S_CLK, IOPORT_PIN_LEVEL_LOW);} while (0)

extern  uint colors[];

void inttpio(void);
void LCD_Init(void);
void delayms(int count) ;
void LCD_Writ_Bus(unsigned int data);
//void LCD_Writ_Bus(char VH,char VL);
void LCD_Write_COM(unsigned int data);
void LCD_Write_DATA(unsigned int data);
void Pant(unsigned int data);
void Address_set(unsigned int x1,unsigned int y1,unsigned int x2,unsigned int y2);
void LCD_color_H(void);
void LCD_color_V(void);
void HC595SendData(unsigned int SendVal);

#endif /* TFT_26_DRIVER_H_ */

#include "TFT_26_driver.h"

uint colors[]=
{0xf800,0x07e0,0x001f,0xffe0,0x0000,0x07ff,0xf81f,0xffff  }; //颜色数据

void inttpio(void)
{
ioport_set_pin_dir(LCD_CS, IOPORT_DIR_OUTPUT);
ioport_set_pin_dir(LCD_RD, IOPORT_DIR_OUTPUT);
ioport_set_pin_dir(LCD_RESET, IOPORT_DIR_OUTPUT);
ioport_set_pin_dir(LCD_WR, IOPORT_DIR_OUTPUT);
ioport_set_pin_dir(LCD_RS, IOPORT_DIR_OUTPUT);

ioport_set_pin_dir(MOSIO, IOPORT_DIR_OUTPUT);
ioport_set_pin_dir(R_CLK, IOPORT_DIR_OUTPUT);
ioport_set_pin_dir(S_CLK, IOPORT_DIR_OUTPUT);

}
void LCD_Init(void)
{
//LCD_ctrl_DIR |= BIT1+BIT2+BIT3+BIT4+BIT5;
   inttpio();
   Set_Rst;
      delayms(5);
Clr_Rst;
delayms(5);
Set_Rst;
delayms(5);

Clr_Cs ;  //打开片选使能

LCD_Write_COM(0x0010); LCD_Write_DATA(0x0000); // Power Control 1  current consumption  STB
delayms(10);

LCD_Write_COM(0x0011); LCD_Write_DATA(0x001c); // Power Control 2
LCD_Write_COM(0x0012); LCD_Write_DATA(0x1212); // Power Control 3  BT2-0, DC11-10, DC21-20, DC31-30


LCD_Write_COM(0x0013); LCD_Write_DATA(0x0041); // Power Control 4  DCR_EX=0, DCR2-0, GVD6-0

LCD_Write_COM(0x0014); LCD_Write_DATA(0x4050); // Power Control 5  VCOMG=0, VCM6-0, VCMR=0, VML6-0

LCD_Write_COM(0x0010); LCD_Write_DATA(0x0800); // Power Control 1


LCD_Write_COM(0x0011); LCD_Write_DATA(0x011c); // Power Control 2

delayms(300);//300ms
LCD_Write_COM(0x0011); LCD_Write_DATA(0x031c); // Power Control 2

delayms(300);//300ms
LCD_Write_COM(0x0011); LCD_Write_DATA(0x071c);  // Power Control 2

delayms(300);//300ms
LCD_Write_COM(0x0011); LCD_Write_DATA(0x0f1c);  // Power Control 2

delayms(40);//600ms
LCD_Write_COM(0x0011); LCD_Write_DATA(0x0f39);  // Power Control 2
delayms(60);//500ms

LCD_Write_COM(0x0001); LCD_Write_DATA(0x0128);  // Driver Output Control

LCD_Write_COM(0x0002); LCD_Write_DATA(0x0100);  // LCD-Driving-Waveform Control

LCD_Write_COM(0x0003); LCD_Write_DATA(0x1030);  // Entry Mode

LCD_Write_COM(0x0008); LCD_Write_DATA(0x0808);  // Frame Cycle Control

LCD_Write_COM(0x000b); LCD_Write_DATA(0x1105);  // Frame Cycle Control

LCD_Write_COM(0x000c); LCD_Write_DATA(0x0000);  // External Display Interface Control

LCD_Write_COM(0x0015); LCD_Write_DATA(0x0020); //VCI Recycling (R15H) // VCIR=010    0X0020

LCD_Write_COM(0x0030); LCD_Write_DATA(0x0000); // SCN 0 Start from G1

LCD_Write_COM(0x0034); LCD_Write_DATA(0x013f); // SE1 = 100111111( 319)

LCD_Write_COM(0x0035); LCD_Write_DATA(0x0000); // SS1 = 000000000

LCD_Write_COM(0x0036); LCD_Write_DATA(0x00ef); // HEA = 011101111(239)


LCD_Write_COM(0x0037); LCD_Write_DATA(0x0000); // HSA = 000000000


LCD_Write_COM(0x0038); LCD_Write_DATA(0x013f); // VEA = 100111111( 319)


LCD_Write_COM(0x0039); LCD_Write_DATA(0x0000);  // VSA = 000000000



LCD_Write_COM(0x0050); LCD_Write_DATA(0x0101);  // Gamma Control

LCD_Write_COM(0x0051); LCD_Write_DATA(0x0903);

LCD_Write_COM(0x0052); LCD_Write_DATA(0x0b08);

LCD_Write_COM(0x0053); LCD_Write_DATA(0x0805);

LCD_Write_COM(0x0054); LCD_Write_DATA(0x0101);

LCD_Write_COM(0x0055); LCD_Write_DATA(0x0d06);

LCD_Write_COM(0x0056); LCD_Write_DATA(0x0e0a);

LCD_Write_COM(0x0057); LCD_Write_DATA(0x0100);

LCD_Write_COM(0x0058); LCD_Write_DATA(0x1f0b);

LCD_Write_COM(0x0059); LCD_Write_DATA(0x0201);


LCD_Write_COM(0x0020); LCD_Write_DATA(0x0000);  //Set RAM Address


LCD_Write_COM(0x0021); LCD_Write_DATA(0x0000);  //Set RAM Address
//0x22 RAM Data Write
//LCD_CtrlWrite(0x0022);

LCD_Write_COM(0x000f); LCD_Write_DATA(0x1f01); // Start Oscillation

      delayms(300);//300ms
LCD_Write_COM(0x0007); LCD_Write_DATA(0x0016);  // Display Control
delayms(32);//200ms
LCD_Write_COM(0x0007); LCD_Write_DATA(0x0017);

Set_Cs;
}

void delayms(int count)  // /* X1ms */
{
   delay_ms(count);
   // int i,j;
   // for(i=0;i<count;i++)
   //       for(j=0;j<500;j++);
}

void LCD_Writ_Bus(unsigned int data) //并行数据写入函数
{
//LCD_DataPortH=VH;    //高位P1口
//LCD_DataPortL=VL;    //低位P0口

HC595SendData(data);
//delay_ms(1);
Clr_Wr;
Set_Wr;
}

void LCD_Write_COM(unsigned int data)    //发送命令
{
   Clr_Rs;//LCD_RS=0;
LCD_Writ_Bus(data);
}

void LCD_Write_DATA(unsigned int data) //发送数据
{
Set_Rs;//LCD_RS=1;
LCD_Writ_Bus(data);
}

void Pant(unsigned int data)
{
int i,j;
Clr_Cs ;  //打开片选使能
Address_set(0,0,239,319);
for(i=0;i<320;i++)
   {
   for (j=0;j<240;j++)
   {
           LCD_Write_DATA(data);
      }

   }
   Set_Cs;//LCD_CS =1;  //关闭片选使能
}

void Address_set(unsigned int x1,unsigned int y1,unsigned int x2,unsigned int y2)
{
LCD_Write_COM(0x0020);LCD_Write_DATA(x1);    //设置X坐标位置
LCD_Write_COM(0x0021);LCD_Write_DATA(y1); //设置Y坐标位置



LCD_Write_COM(0x0037);LCD_Write_DATA(x1); //开始X
LCD_Write_COM(0x0039);LCD_Write_DATA(y1);    //开始Y
LCD_Write_COM(0x0036);LCD_Write_DATA(x2); //结束X
LCD_Write_COM(0x0038);LCD_Write_DATA(y2); //结束Y

LCD_Write_COM(0x0022); //开启显示命令
}

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

  水平彩条显示子函数

**********************************************************/
void LCD_color_H(void)
{
uint num;
uchar n;
Address_set(0, 0, 239,319);
for(n=0;n<8;n++)
{
   for(num=40*240;num>0;num--)
   {
   LCD_Write_DATA(colors[n]);
   }
}
}

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

  垂直彩条显示子函数

**********************************************************/
void LCD_color_V(void)
{
uint num;
uchar n,x1,x2;
x1 = 0;
x2 = 30;

for(n=0;n<8;n++)
{
      Address_set(x1, 0, x2-1,319);
      x1 = x2;
      x2 = x2+30;

   for(num=30*320;num>0;num--)
   {
   LCD_Write_DATA(colors[n]);
   }
}

}

void HC595SendData(unsigned int SendVal)
{
unsigned char i;

for(i=0;i<16;i++)
{
   if(((SendVal<<i)&0x8000)==0x8000)
   {
         SET_MOSIO;// MOSIO=1; //set dataline high  0X8000  最高位与SendVal左移的最高位进行逻辑运算
   }
else
   {
   CLR_MOSIO; //MOSIO=0;    // 如果为真 MOSIO = 1
   }

CLR_S_CLK;//S_CLK=0;
//NOP();
//NOP();
for(char j=2;j>0;j--);
SET_S_CLK;//S_CLK=1;
}

CLR_R_CLK;//R_CLK=0; //set dataline low
//NOP();
//NOP();
for(char k=2;k>0;k--);
SET_R_CLK;//R_CLK=1; //片选

}

小农 · 发表于 2013-11-1 20:41:58

SAM4N的GPIO都不齐的，用这种方式驱动会很慢的，所以还是放弃玩彩屏吧

SAM4N控制TFT2.6彩屏求解？

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