挑战者F429RGB屏幕四种方向显示字符串

Yuhailong · 发表于 2020-7-9 22:44:42

本帖最后由 Yuhailong 于 2020-7-10 10:21 编辑

挑战者F429的RGB屏幕显示例程只能从一个方向显示字符串，我研究了一下，改动了一些代码，现在可以设置四种方向显示字符串

1.首先写了一个画点的函数，可以从四种不同的方向画点

/**
* [url=home.php?mod=space&uid=41770]@brief[/url] 在屏幕上面画点
* @param Xpos: 横坐标.
* @param Ypos: 纵坐标.
* @param mode:显示方向
* @param color:显示的颜色
* @retval None
*/
void LCD_DrawSome(uint16_t Xpos, uint16_t Ypos, uint8_t mode,uint32_t color)
{
uint32_t videoMemory;
switch(mode)
{
case 0:
videoMemory = CurrentFrameBuffer + (LCD_PIXEL_WIDTH - Ypos -1)*2 + (Xpos * LCD_PIXEL_WIDTH*2);
*(__IO uint16_t*) (videoMemory) = color;
break;
case 1:
videoMemory = CurrentFrameBuffer + Xpos *2 + (Ypos * LCD_PIXEL_WIDTH*2);
*(__IO uint16_t*) (videoMemory) = color;
break;
case 2:
videoMemory =(CurrentFrameBuffer + 480*800*2) - ((Xpos + 1)*2 + (Ypos * LCD_PIXEL_WIDTH*2));
*(__IO uint16_t*) (videoMemory) = color;
break;
case 3:
videoMemory =CurrentFrameBuffer + (480*800*2 - (Xpos*2*LCD_PIXEL_WIDTH + (LCD_PIXEL_WIDTH - Ypos)*2));
*(__IO uint16_t*) (videoMemory) = color;
break;
}
}

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2.然后将画点函数和显示字符串的函数结合一下，改动如下：

/**
* @brief Displays a maximum of 20 char on the LCD.
* @param Line: the Line where to display the character shape .
* This parameter can be one of the following values:
* @arg Linex: where x can be 0..9
* @param *ptr: pointer to string to display on LCD.
* @retval None
*/
void LCD_DisplayStringLine(uint16_t Line, uint8_t *ptr)
{
uint16_t refcolumn = 0;
/* Send the string character by character on lCD */
while ((refcolumn < LCD_PIXEL_WIDTH) && ((*ptr != 0) & (((refcolumn + LCD_Currentfonts->Width) & 0xFFFF) >= LCD_Currentfonts->Width)))
{
/* Display one character on LCD */
LCD_DisplayChar(refcolumn,Line , *ptr);
/* Decrement the column position by width */
refcolumn += LCD_Currentfonts->Width;
/* Point on the next character */
ptr++;
}
}

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/**
* @brief Draws a character on LCD.
* @param Xpos: the Line where to display the character shape.
* @param Ypos: start column address.
* @param c: pointer to the character data.
* @retval None
*/
void LCD_DrawChar(uint16_t Xpos, uint16_t Ypos, const uint16_t *c)
{
uint32_t index = 0, counter = 0, xpos =0;
uint32_t Xaddress = 0;
xpos = Xpos;;
Xaddress += Ypos ;
for(index = 0; index < LCD_Currentfonts->Height; index++)
{
Xpos = xpos;
for(counter = 0; counter < LCD_Currentfonts->Width; counter++)
{
if((((c[index] & ((0x80 << ((LCD_Currentfonts->Width / 12 ) * 8 ) ) >> counter)) == 0x00) &&(LCD_Currentfonts->Width <= 12))||
(((c[index] & (0x1 << counter)) == 0x00)&&(LCD_Currentfonts->Width > 12 )))
{
LCD_DrawSome(Xpos,Xaddress,SET_DIRECTION,CurrentBackColor);
}
else
{
LCD_DrawSome(Xpos,Xaddress,SET_DIRECTION,CurrentTextColor);
}
Xpos++;
}
Xaddress++;
}
}