求解软件模拟spi驱动st7735r

恨在夕阳

求解lm3s通过软件模拟spi驱动st7735r,程序如下，为何初始化后还是白屏呢？

#define SPILCD_BASE GPIO_PORTD_BASE

#define SPILCD_CS GPIO_PIN_4   //PD4

#define SPILCD_SDA GPIO_PIN_6    //PD6

#define SPILCD_SCL GPIO_PIN_5   //PD5

#define SPILCD_RS GPIO_PIN_7   //PD7

//片选使能

#define LCD_CS_L()  GPIOPinWrite(SPILCD_BASE, SPILCD_CS, 0)

#define LCD_CS_H()  GPIOPinWrite(SPILCD_BASE, SPILCD_CS, SPILCD_CS)

//命令片选

#define LCD_CMD_RS_L()  GPIOPinWrite(SPILCD_BASE, SPILCD_RS, 0)

//数据片选

#define LCD_DATA_RS_H()  GPIOPinWrite(SPILCD_BASE, SPILCD_RS, SPILCD_RS)

//SCL时钟

#define LCD_SCL_L()  GPIOPinWrite(SPILCD_BASE, SPILCD_SCL, 0)

#define LCD_SCL_H()  GPIOPinWrite(SPILCD_BASE, SPILCD_SCL, SPILCD_SCL)

//SDA

#define LCD_SDA_L() GPIOPinWrite(SPILCD_BASE, SPILCD_SDA, 0)

#define LCD_SDA_H() GPIOPinWrite(SPILCD_BASE, SPILCD_SDA, SPILCD_SDA)

//液晶屏尺寸定义

#if (SPILCD_TYPE == 1) //1.8寸

#define SPILCD_W 128

#define SPILCD_H 160

#elif (SPILCD_TYPE == 2) //2.2寸

#define SPILCD_W 176

#define SPILCD_H 220

#endif

//TFTLCD部分外要调用的函数    

//u16  OINT_COLOR;//前景色   

//u16  BACK_COLOR; //背景色

//////////////////////////////////////////////////////////////////////

//字体

#define ASCII1206   0

#define ASCII1608   1

#define ASCII1608C 2

//////////////////////////////////////////////////////////////////////

//画笔颜色

#define WHITE 0xFFFF

#define BLACK 0x0000   

#define BLUE 0x001F  

#define BRED 0XF81F

#define GRED 0XFFE0

#define GBLUE 0X07FF

#define RED 0xF800

#define MAGENTA 0xF81F

#define GREEN 0x07E0

#define CYAN 0x7FFF

#define YELLOW 0xFFE0

#define BROWN 0XBC40 //棕色

#define BRRED 0XFC07 //棕红色

#define GRAY 0X8430 //灰色

//GUI颜色

#define DARKBLUE        0X01CF //深蓝色

#define LIGHTBLUE        0X7D7C //浅蓝色  

#define GRAYBLUE         0X5458 //灰蓝色

//以上三色为PANEL的颜色 

#define LIGHTGREEN       0X841F //浅绿色

#define LIGHTGRAY        0XEF5B //浅灰色(PANNEL)

#define LGRAY  0XC618 //浅灰色(PANNEL),窗体背景色

#define LGRAYBLUE        0XA651 //浅灰蓝色(中间层颜色)

#define LBBLUE           0X2B12 //浅棕蓝色(选择条目的反色)

////////////////////////////

//前景色 背景色

unsigned short POINT_COLOR = 0xffff,BACK_COLOR = 0x0000;  

//函数名：SPILCD_WR_REG

//参  数：无

//        实现写入一字节命令

void SPILCD_WR_REG(unsigned char ucData)

{

unsigned char i = 8;

LCD_CS_L();

LCD_CMD_RS_L();

while(i--)

{

LCD_SCL_L();

if(ucData & 0x80)

{

LCD_SDA_H();

}

else

{

LCD_SDA_L();

}

LCD_SCL_H();

ucData <<=1; /* 左移一位，准备发送下一位数据 */

}

LCD_CS_H();

}

//函数名：LCD_WR_REG

//参  数：无

//        实现写入一字节数据

void SPILCD_WR_DATA(unsigned char ucData)

{

    unsigned char i = 8;

LCD_CS_L();

LCD_DATA_RS_H();

while(i--)

{

LCD_SCL_L();

if(ucData & 0x80)

{

LCD_SDA_H();

}

else

{

LCD_SDA_L();

}

LCD_SCL_H();

ucData <<=1; /* 左移一位，准备发送下一位数据 */

}

LCD_CS_H();

}

//函数名：SPILCD_Init

//参  数：无

//        LCD 硬件初始化

void SPILCD_Init()

{

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);  

SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);  

// GPIODirModeSet(SPILCD_BASE,LCD_PIN_D,GPIO_DIR_MODE_OUT);

// GPIOPadConfigSet(SPILCD_BASE, LCD_PIN_D, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);

GPIOPinTypeGPIOOutput(SPILCD_BASE,SPILCD_CS);

GPIOPadConfigSet(SPILCD_BASE,SPILCD_CS, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);

GPIOPinTypeGPIOOutput(SPILCD_BASE,SPILCD_SCL);

GPIOPadConfigSet(SPILCD_BASE,SPILCD_SCL, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);

GPIOPinTypeGPIOOutput(SPILCD_BASE,SPILCD_SDA);

GPIOPadConfigSet(SPILCD_BASE,SPILCD_SDA, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);

GPIOPinTypeGPIOOutput(SPILCD_BASE,SPILCD_RS);

GPIOPadConfigSet(SPILCD_BASE,SPILCD_RS, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD);

GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE,GPIO_PIN_2);

GPIOPadConfigSet(GPIO_PORTF_BASE,GPIO_PIN_2, GPIO_STRENGTH_2MA, GPIO_PIN_TYPE_STD_WPU);

/* SPILCD_RST=1;

DelayMs (1); //Delay 1ms

SPILCD_RST=0;

DelayMs (1); //Delay 1ms

SPILCD_RST=1;

DelayMs (120); //Delay 120ms

PreciseDelay_ms(120);

*/

SPILCD_WR_REG(0x11);//Sleep out

PreciseDelay_ms(120);

//ST7735R Frame Rate

SPILCD_WR_REG(0xB1);

SPILCD_WR_DATA(0x01);

SPILCD_WR_DATA(0x2C);

SPILCD_WR_DATA(0x2D);

SPILCD_WR_REG(0xB2);

SPILCD_WR_DATA(0x01);

SPILCD_WR_DATA(0x2C);

SPILCD_WR_DATA(0x2D);

SPILCD_WR_REG(0xB3);

SPILCD_WR_DATA(0x01);

SPILCD_WR_DATA(0x2C);

SPILCD_WR_DATA(0x2D);

SPILCD_WR_DATA(0x01);

SPILCD_WR_DATA(0x2C);

SPILCD_WR_DATA(0x2D);

//------------------------------------End ST7735R Frame Rate-----------------------------------------//

SPILCD_WR_REG(0xB4);//Column inversion

SPILCD_WR_DATA(0x07);

//------------------------------------ST7735R Power Sequence-----------------------------------------//

SPILCD_WR_REG(0xC0);

SPILCD_WR_DATA(0xA2);

SPILCD_WR_DATA(0x02);

SPILCD_WR_DATA(0x84);

SPILCD_WR_REG(0xC1);

SPILCD_WR_DATA(0xC5);

SPILCD_WR_REG(0xC2);

SPILCD_WR_DATA(0x0A);

SPILCD_WR_DATA(0x00);

SPILCD_WR_REG(0xC3);

SPILCD_WR_DATA(0x8A);

SPILCD_WR_DATA(0x2A);

SPILCD_WR_REG(0xC4);

SPILCD_WR_DATA(0x8A);

SPILCD_WR_DATA(0xEE);

//---------------------------------End ST7735R Power Sequence-------------------------------------//

SPILCD_WR_REG(0xC5);//VCOM

SPILCD_WR_DATA(0x0E);

SPILCD_WR_REG(0x36);//MX, MY, RGB mode

SPILCD_WR_DATA(0xC8);

//------------------------------------ST7735R Gamma Sequence-----------------------------------------//

SPILCD_WR_REG(0xe0);

SPILCD_WR_DATA(0x02);

SPILCD_WR_DATA(0x1c);

SPILCD_WR_DATA(0x07);

SPILCD_WR_DATA(0x12);

SPILCD_WR_DATA(0x37);

SPILCD_WR_DATA(0x32);

SPILCD_WR_DATA(0x29);

SPILCD_WR_DATA(0x2d);

SPILCD_WR_DATA(0x29);

SPILCD_WR_DATA(0x25);

SPILCD_WR_DATA(0x2b);

SPILCD_WR_DATA(0x39);

SPILCD_WR_DATA(0x00);

SPILCD_WR_DATA(0x01);

SPILCD_WR_DATA(0x03);

SPILCD_WR_DATA(0x10);

SPILCD_WR_REG(0xe1);

SPILCD_WR_DATA(0x03);

SPILCD_WR_DATA(0x1d);

SPILCD_WR_DATA(0x07);

SPILCD_WR_DATA(0x06);

SPILCD_WR_DATA(0x2e);

SPILCD_WR_DATA(0x2c);

SPILCD_WR_DATA(0x29);

SPILCD_WR_DATA(0x2d);

SPILCD_WR_DATA(0x2e);

SPILCD_WR_DATA(0x2e);

SPILCD_WR_DATA(0x37);

SPILCD_WR_DATA(0x3f);

SPILCD_WR_DATA(0x00);

SPILCD_WR_DATA(0x00);

SPILCD_WR_DATA(0x02);

SPILCD_WR_DATA(0x10);

SPILCD_WR_REG(0x2A);

SPILCD_WR_DATA(0x00);

SPILCD_WR_DATA(0x02);

SPILCD_WR_DATA(0x00);

SPILCD_WR_DATA(0x81);

  

SPILCD_WR_REG(0x2B);

SPILCD_WR_DATA(0x00);

SPILCD_WR_DATA(0x01);

SPILCD_WR_DATA(0x00);

SPILCD_WR_DATA(0xA0);

//------------------------------------End ST7735R Gamma Sequence-----------------------------------------//

SPILCD_WR_REG(0x3A); 

SPILCD_WR_DATA(0x05);  

//SPILCD_WR_REG(0x3A);//65k mode

//LCD_WR_DATA(0x05);

SPILCD_WR_REG(0x29);//Display on

PreciseDelay_ms(10);

SPILCD_Clear(BACK_COLOR);

SPILCD_Clear(RED);

SPILCD_DrawLine(20,20,60,60);

}

//参  数：无

//        准备开始写入GRAM

void SPILCD_WriteRAM_Prepare(void)

{

SPILCD_WR_REG(0x2c);   //写RAM

}  

//函数名：LCD_WR_REG

//参  数：无

//        写GRAM数据

void SPILCD_WriteRAM(unsigned short RGB_Code)

{     

    SPILCD_WR_DATA(RGB_Code>>8);

    SPILCD_WR_DATA(RGB_Code); 

}

//函数名：LCD_DisplayOn

//参  数：无

//        开启显示

void LCD_DisplayOn(void)

{    

    SPILCD_WR_REG(0x29);   //

}  

//函数名：LCD_DisplayOff

//参  数：无

//        关闭显示

void LCD_DisplayOff(void)

{    

    SPILCD_WR_REG(0x28);   //

}   

//函数名：LCD_SetWindow

//参  数：Xpos:横坐标

// Ypos:纵坐标

void SPILCD_SetWindow(unsigned short xstat,unsigned short xend,unsigned short ystat,unsigned short yend)

{

   SPILCD_WR_REG(0x2A);

   SPILCD_WR_DATA(xstat>>8);

   SPILCD_WR_DATA(xstat);

   SPILCD_WR_DATA(xend>>8);

   SPILCD_WR_DATA(xend);

   SPILCD_WR_REG(0x2B);

   SPILCD_WR_DATA(ystat>>8);

   SPILCD_WR_DATA(ystat);

   SPILCD_WR_DATA(yend>>8);

SPILCD_WR_DATA(yend);

}

//开启反色显示

void LCD_InvDisplayOn()

{

  SPILCD_WR_REG(0x21);  

}

//关闭反色显示

void LCD_InvDisplayOff()

{

  SPILCD_WR_REG(0x20); 

}   

//------------------------------------------------------------------------------------------------------------

//------------------------------------------------------------------------------------------------------------

//SPILCD DRIVER  LV1层    ----   LV1 在LV0的基础上实现

//打点

//清屏

//填充

//画线

//矩形边框

//画园

//函数名：SPILCD_Init

//参  数：X Y 坐标 

//        在X Y上打点

void SPILCD_DrawPoint(unsigned short x,unsigned short y)

{

  SPILCD_SetWindow(x,x+1,y,y+1);//设置光标位置 

SPILCD_WriteRAM_Prepare();     //开始写入GRAM  

SPILCD_WriteRAM(POINT_COLOR);

}   

//函数名：SPILCD_Clear

//参  数：Color 颜色      

void SPILCD_Clear(unsigned short Color)

{

unsigned long index=0;      

SPILCD_SetWindow(0,SPILCD_W-1,0,SPILCD_H-1);  

SPILCD_WriteRAM_Prepare();     //开始写入GRAM     

for(index=0;index<SPILCD_W*SPILCD_H;index++)

{

SPILCD_WriteRAM(Color);//显示所填充的颜色. 

}

}  

//函数名：SPILCD_Fill

//参  数：起始终点坐标

void SPILCD_Fill(unsigned short xsta,unsigned short ysta,unsigned short xend,unsigned short yend,unsigned short color)

{                    

unsigned long n;

//设置窗口

  SPILCD_SetWindow(xsta,xend,ysta,yend);

SPILCD_WriteRAM_Prepare();  //开始写入GRAM          

n=(unsigned long)(yend-ysta+1)*(xend-xsta+1);    

while(n--){SPILCD_WriteRAM(color);}//显示所填充的颜色. 

//恢复设置

SPILCD_SetWindow(0,SPILCD_W-1,0,SPILCD_H-1);     

}

//函数名：SPILCD_DrawLine

//参  数：起始终点坐标

void SPILCD_DrawLine(unsigned short x1,unsigned short y1,unsigned short x2,unsigned short y2)

{

unsigned short t; 

int xerr=0,yerr=0,delta_x,delta_y,distance; 

int incx,incy,uRow,uCol; 

delta_x=x2-x1; //计算坐标增量 

delta_y=y2-y1; 

uRow=x1; 

uCol=y1; 

if(delta_x>0)incx=1; //设置单步方向 

else if(delta_x==0)incx=0;//垂直线 

else {incx=-1;delta_x=-delta_x;} 

if(delta_y>0)incy=1; 

else if(delta_y==0)incy=0;//水平线 

else{incy=-1;delta_y=-delta_y;} 

if( delta_x>delta_y)distance=delta_x; //选取基本增量坐标轴 

else distance=delta_y; 

for(t=0;t<=distance+1;t++ )//画线输出 

{  

SPILCD_DrawPoint(uRow,uCol);//画点 

xerr+=delta_x ; 

yerr+=delta_y ; 

if(xerr>distance) 

{ 

xerr-=distance; 

uRow+=incx; 

} 

if(yerr>distance) 

{ 

yerr-=distance; 

uCol+=incy; 

} 

}  

} 

正点原子

估计没初始化成功吧，可以先看看你的SPI通信是不是正常的。
你的ST7735，是不是可以支持读寄存器？如果可以，读取几个寄存器，试试就知道SPI通信是不是正常了。

华夏小川

哥们解决了没了，我也有个这个液晶也是白屏

MissLiu

屏幕的刷新速度快不快的？想问一下我的刷新速度好像不太快。

MissLiu

屏幕的刷新速度快不快的？想问一下我的刷新速度好像不太快。