7寸TFT V2液晶屏显示求助

756566259 · 发表于 2018-1-25 13:41:38

问题：液晶屏清屏可以显示不同的颜色，但是不显示字符，执行画点函数也不画点？
硬件配置：MCU 是STM32F103VE，7寸屏是正点原子的7寸TFT V2屏  液晶驱动是SSD1963 SSD1963 RS引脚接MCU 的FSMC_A16    CS引脚接FSMC_NE1
代码用的是正点原子的触摸屏实验代码，如下

//typedef struct
//{
// vu16 LCD_REG;
// vu16 LCD_RAM;
//} LCD_TypeDef;

//#define LCD_BASE       ((u32)(0x6C000000 | 0x000007FE))
//#define LCD          ((LCD_TypeDef *) LCD_BASE)

#define LCD_WR_REG(add) ((*(volatile u16 *)((uint32_t)0x60000000)) = ((u16)add))
#define LCD_WR_DATA(val)    ((*(volatile u16 *) ((uint32_t)0x60020000)) = ((u16)(val)))

因为用的是FSMC_NE1 FSMC_A16  所以地址改为上面重新定义的地址

下面是LCD_Init 初始化函数

LCD_WR_REG(0xE2); //Set PLL with OSC = 10MHz (hardware), Multiplier N = 35, 250MHz < VCO < 800MHz = OSC*(N+1), VCO = 300MHz
LCD_WR_DATA(0x1D); //2Îêy1
LCD_WR_DATA(0x02); //2Îêy2 Divider M = 2, PLL = 300/(M+1) = 100MHz
LCD_WR_DATA(0x04); //2Îêy3 Validate M and N values
delay_us(100);
LCD_WR_REG(0xE0); // Start PLL command
LCD_WR_DATA(0x01); // enable PLL
delay_ms(10);
LCD_WR_REG(0xE0); // Start PLL command again
LCD_WR_DATA(0x03); // now, use PLL output as system clock
delay_ms(12);
LCD_WR_REG(0x01); //èí¸′Î»
delay_ms(10);

LCD_WR_REG(0xE6); //éèÖÃÏñËØÆμÂê,33Mhz
LCD_WR_DATA(0x2F);
LCD_WR_DATA(0xFF);
LCD_WR_DATA(0xFF);

LCD_WR_REG(0xB0); //éèÖÃLCDÄ￡ê½
LCD_WR_DATA(0x20); //24Î»Ä￡ê½
LCD_WR_DATA(0x00); //TFT Ä￡ê½

LCD_WR_DATA((SSD_HOR_RESOLUTION-1)>>8);//éèÖÃLCDË®Æ½ÏñËØ
LCD_WR_DATA(SSD_HOR_RESOLUTION-1);
LCD_WR_DATA((SSD_VER_RESOLUTION-1)>>8);//éèÖÃLCD′1Ö±ÏñËØ
LCD_WR_DATA(SSD_VER_RESOLUTION-1);
LCD_WR_DATA(0x00); //RGBDòáD

LCD_WR_REG(0xB4); //Set horizontal period
LCD_WR_DATA((SSD_HT-1)>>8);
LCD_WR_DATA(SSD_HT-1);
LCD_WR_DATA(SSD_HPS>>8);
LCD_WR_DATA(SSD_HPS);
LCD_WR_DATA(SSD_HOR_PULSE_WIDTH-1);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);
LCD_WR_REG(0xB6); //Set vertical period
LCD_WR_DATA((SSD_VT-1)>>8);
LCD_WR_DATA(SSD_VT-1);
LCD_WR_DATA(SSD_VPS>>8);
LCD_WR_DATA(SSD_VPS);
LCD_WR_DATA(SSD_VER_FRONT_PORCH-1);
LCD_WR_DATA(0x00);
LCD_WR_DATA(0x00);

LCD_WR_REG(0xF0); //éèÖÃSSD1963óëCPU½ó¿úÎa16bit
LCD_WR_DATA(0x03); //16-bit(565 format) data for 16bpp

LCD_WR_REG(0x29); //¿aÆôÏÔê¾
//éèÖ&#195

WMêä3ö ±31aí¨1yÕ¼¿Õ±è¿éμ÷
LCD_WR_REG(0xD0); //éèÖÃ×Ô¶ˉ°×Æ½oaDBC
LCD_WR_DATA(0x00); //disable

LCD_WR_REG(0xBE); //ÅäÖ&#195

WMêä3ö
LCD_WR_DATA(0x05); //1éèÖ&#195

WMÆμÂê
LCD_WR_DATA(0xFE); //2éèÖ&#195

WMÕ¼¿Õ±è
LCD_WR_DATA(0x01); //3éèÖÃC
LCD_WR_DATA(0x00); //4éèÖÃD
LCD_WR_DATA(0x00); //5éèÖÃE
LCD_WR_DATA(0x00); //6éèÖÃF

LCD_WR_REG(0xB8); //éèÖÃGPIOÅäÖÃ
LCD_WR_DATA(0x03); //2¸öIO¿úéèÖÃ3éêä3ö
LCD_WR_DATA(0x01); //GPIOê1óÃÕy3￡μÄIO1|Äü
LCD_WR_REG(0xBA);
LCD_WR_DATA(0X01); //GPIO[1:0]=01,¿ØÖÆLCD·½Ïò

LCD_SSD_BackLightSet(100);//±31aéèÖÃÎa×îáá
}
LCD_Display_Dir(0); //Ä¬èÏÎaêúÆá
LCD_LED=1; //μãáá±31a
LCD_Clear(WHITE);

这里的LCD_Clear 函数可以显示不同的颜色

//画点函数
void LCD_DrawPoint(u16 x,u16 y)
{
LCD_SetCursor(x,y); //设置光标函数
LCD_WriteRAM_Prepare(); //写入GRAM
LCD_WR_DATA(POINT_COLOR);//写入颜色  //LCD->LCD_RAM=POINT_COLOR；
}

//设置光标函数
void LCD_SetCursor(u16 Xpos, u16 Ypos)
{
      if(lcddev.id==0X1963)
{
if(lcddev.dir==0)//x×ø±êDèòa±ä»»
{
Xpos=lcddev.width-1-Xpos;
LCD_WR_REG(lcddev.setxcmd);
LCD_WR_DATA(0);LCD_WR_DATA(0);
LCD_WR_DATA(Xpos>>8);LCD_WR_DATA(Xpos&0XFF);
}else
{
LCD_WR_REG(lcddev.setxcmd);
LCD_WR_DATA(Xpos>>8);LCD_WR_DATA(Xpos&0XFF);
LCD_WR_DATA((lcddev.width-1)>>8);LCD_WR_DATA((lcddev.width-1)&0XFF);
}
LCD_WR_REG(lcddev.setycmd);
LCD_WR_DATA(Ypos>>8);LCD_WR_DATA(Ypos&0XFF);
LCD_WR_DATA((lcddev.height-1)>>8);LCD_WR_DATA((lcddev.height-1)&0XFF);

   }
}

//开始写入GRAM
void LCD_WriteRAM_Prepare(void)
{
LCD_WR_REG(lcddev.wramcmd);//LCD->LCD_REG=lcddev.wramcmd;
}

代码如上，不知道为什么画点就不可以，请大神们指导下，谢谢了。

[img]file:///C:\Users\Administrator\AppData\Roaming\Tencent\Users\756566259\QQ\WinTemp\RichOle\PB)2H$YGW[UB79R$C5[DB56.png[/img]

[img]file:///C:\Users\Administrator\AppData\Roaming\Tencent\Users\756566259\QQ\WinTemp\RichOle\PB)2H$YGW[UB79R$C5[DB56.png[/img]

a3748622 · 发表于 2018-1-25 13:47:52

分辨率那些宏定义改对了吗。

//绘点函数，在指定位置绘制一个指定颜色的点
void LCD_Fast_DrawPoint(u16 x,u16 y,u16 color)
{

LCD_WR_REG(0x002A);
LCD_WR_DATA((x)>>8);
LCD_WR_DATA((x)&0x00ff);
LCD_WR_DATA((x)>>8);
LCD_WR_DATA((x)&0x00ff);

LCD_WR_REG(0x002b);

LCD_WR_DATA((y)>>8);
LCD_WR_DATA((y)&0x00ff);
LCD_WR_DATA((y)>>8);
LCD_WR_DATA((y)&0x00ff);

LCD_WR_REG(0x002c);

      LCD_WR_DATA(color);    //将取出的16位像素数据送入显示区
}

给个画点你参考，我自己写的

a3748622 · 发表于 2018-1-25 14:01:00

不过我有点疑惑

为什么你这里
#define LCD_WR_REG(add) ((*(volatile u16 *)((uint32_t)0x60000000)) = ((u16)add))
#define LCD_WR_DATA(val) ((*(volatile u16 *) ((uint32_t)0x60020000)) = ((u16)(val)))

LCD_WR_REG的地址是0x60000000，而不是0x6001FFFE呢？