【NUCLEO-L452RE测评】+2.2寸TFT显示屏的驱动显示
<div class='showpostmsg'> 本帖最后由 jinglixixi 于 2020-12-25 18:00 编辑<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">前文介绍了以</span>STM32L452RE<span style="font-family:宋体">来驱动</span>OLED<span style="font-family:宋体">屏,但它的屏幕比较小,这次就用它来驱动</span><span lang="EN-US" style="font-size:12.0pt"><span style="background:white"><span style="font-family:"Times New Roman","serif""><span style="color:#444444"><span style="letter-spacing:.75pt">2.2</span></span></span></span></span><span style="font-size:12.0pt"><span style="background:white"><span style="font-family:"微软雅黑","sans-serif""><span style="color:#444444"><span style="letter-spacing:.75pt">寸</span></span></span></span></span>TFT<span style="font-family:宋体">显示屏。</span></span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">鉴于</span>STM32L452RE<span style="font-family:宋体">开发板配有</span><span lang="EN-US" style="background:white"><span style="color:#333333">Arduino</span></span><span style="background:white"><span style="font-family:宋体"><span style="color:#333333">接口,因此就直接利用它来连接</span></span></span><span lang="EN-US" style="background:white"><span style="color:#333333">TFT</span></span><span style="background:white"><span style="font-family:宋体"><span style="color:#333333">显示屏,该显示屏与</span></span></span><span lang="EN-US" style="background:white"><span style="color:#333333">MCU</span></span><span style="background:white"><span style="font-family:宋体"><span style="color:#333333">的连接关系为:</span></span></span></span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">CS ---PA5</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">RST--- PA6</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">D/C---PA7</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">SDI--- PB6</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">SCK---PC7</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">LED--- PA9</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">输出高低电平的语句定义为:</span></span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_CS_High() HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_SET) // PA5</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_CS_Low() HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_RESET)</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_REST_High() HAL_GPIO_WritePin(GPIOA,GPIO_PIN_6,GPIO_PIN_SET) // PA6</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_REST_Low() HAL_GPIO_WritePin(GPIOA,GPIO_PIN_6,GPIO_PIN_RESET)</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_DC_High() HAL_GPIO_WritePin(GPIOA,GPIO_PIN_7,GPIO_PIN_SET) // PA7</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_DC_Low() HAL_GPIO_WritePin(GPIOA,GPIO_PIN_7,GPIO_PIN_RESET)</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_SDI_High() HAL_GPIO_WritePin(GPIOB,GPIO_PIN_6,GPIO_PIN_SET) // PB6</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_SDI_Low() HAL_GPIO_WritePin(GPIOB,GPIO_PIN_6,GPIO_PIN_RESET)</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_SCK_High() HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_SET) // PC7</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_SCK_Low() HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_RESET)</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif">#define LCD_LED_High() HAL_GPIO_WritePin(GPIOA,GPIO_PIN_9,GPIO_PIN_SET) // PA9</span></span></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">引脚输出功能的配置函数为:</span></span></span></p>
<pre>
<code class="language-cpp">void APP_TFT_init(void)
{
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Pin = GPIO_PIN_5;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_6;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_7;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = GPIO_PIN_9;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
__HAL_RCC_GPIOB_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_6;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
__HAL_RCC_GPIOC_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_7;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
LCD_LED_High();
}</code></pre>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">实现图片显示的函数为:</span></span></span></p>
<pre>
<code class="language-cpp">void show_pic(const unsigned char *p)
{
int i,j;
unsigned char picH,picL;
Address_set(0,0,LCD_W-1,LCD_H-1);
for(i=0;i<240;i++)
{
for(j=0;j<320;j++)
{
picH=*p++;
picL=*p++;
LCD_WR_DATA8(picH);
LCD_WR_DATA8(picL);
}
}
}</code></pre>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">实现显示效果的主程序为:</span></span></span></p>
<pre>
<code class="language-cpp">int main(void)
{
HAL_Init();
/* Configure the system clock to 80 MHz */
SystemClock_Config();
APP_TFT_init();
LCD_Init();
//LCD_Clear(WHITE);
show_pic(gImage_a);
while (1);
}</code></pre>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">经程序的编译下载,其显示效果如图所示。</span></span></span></p>
<p align="left" style="text-align:left"></p>
<p align="left" style="text-align:left"><span style="font-size:10.5pt"><span style="font-family:Calibri,sans-serif"><span style="font-family:宋体">显示效果</span></span></span></p>
<p align="left" style="text-align:left"> </p>
<p><span style="font-size:10.5pt"><span style="font-family:宋体">如果</span></span><span lang="EN-US" style="font-size:10.5pt"><span style="font-family:"Calibri","sans-serif"">2.2</span></span><span style="font-size:10.5pt"><span style="font-family:宋体">寸</span></span><span lang="EN-US" style="font-size:10.5pt"><span style="font-family:"Calibri","sans-serif"">TFT</span></span><span style="font-size:10.5pt"><span style="font-family:宋体">显示屏还显小的话,后面咱再上个</span></span><span lang="EN-US" style="font-size:10.5pt"><span style="font-family:"Calibri","sans-serif"">2.8</span></span><span style="font-size:10.5pt"><span style="font-family:宋体">寸触摸屏。</span></span></p>
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freebsder 发表于 2020-12-25 18:24
美女可以,就是分辨率不行。
<p>你心目中最基本的分辨率是个啥标准呀?</p>
<p>我觉得这个屏幕更适合我。哈哈!</p>
w494143467 发表于 2020-12-26 10:41
我觉得这个屏幕更适合我。哈哈!
<p>是,这块屏能直接插到Arduino接口来用,省去了连线比较方便。2.8寸的触摸屏就不行了,部分引脚没法直接插到插排中,就只能连线了。</p>
jinglixixi 发表于 2020-12-26 11:02
是,这块屏能直接插到Arduino接口来用,省去了连线比较方便。2.8寸的触摸屏就不行了,部分引脚没法直接插 ...
<p>SOGA,那我得有一个这样的屏幕,应该现在很多开发板都拥有Arduino的接口。</p>
w494143467 发表于 2020-12-26 17:43
SOGA,那我得有一个这样的屏幕,应该现在很多开发板都拥有Arduino的接口。
<p>没错,是这样。</p>
<p><strong><a href="https://bbs.eeworld.com.cn/elecplay/content/148" target="_blank">ST NUCLEO-L452RE测评</a></strong></p>
<p>汇总贴:<a href="https://bbs.eeworld.com.cn/thread-1151850-1-1.html" target="_blank">https://bbs.eeworld.com.cn/thread-1151850-1-1.html </a>、</p>
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