jinglixixi 发表于 2020-12-25 17:57

【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:&quot;Times New Roman&quot;,&quot;serif&quot;"><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:&quot;微软雅黑&quot;,&quot;sans-serif&quot;"><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()&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HAL_GPIO_WritePin(GPIOA,GPIO_PIN_5,GPIO_PIN_SET)&nbsp;&nbsp; // 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()&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;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()&nbsp;&nbsp;&nbsp;&nbsp; HAL_GPIO_WritePin(GPIOA,GPIO_PIN_6,GPIO_PIN_SET)&nbsp;&nbsp;&nbsp; // 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()&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 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()&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HAL_GPIO_WritePin(GPIOA,GPIO_PIN_7,GPIO_PIN_SET)&nbsp;&nbsp;&nbsp; // 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()&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 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()&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HAL_GPIO_WritePin(GPIOB,GPIO_PIN_6,GPIO_PIN_SET)&nbsp;&nbsp; // 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()&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 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()&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_SET)&nbsp;&nbsp; // 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()&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;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()&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HAL_GPIO_WritePin(GPIOA,GPIO_PIN_9,GPIO_PIN_SET)&nbsp;&nbsp;&nbsp;&nbsp; // 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, &amp;GPIO_InitStruct);  
    GPIO_InitStruct.Pin = GPIO_PIN_6;
    HAL_GPIO_Init(GPIOA, &amp;GPIO_InitStruct);
    GPIO_InitStruct.Pin = GPIO_PIN_7;
    HAL_GPIO_Init(GPIOA, &amp;GPIO_InitStruct);
    GPIO_InitStruct.Pin = GPIO_PIN_9;
    HAL_GPIO_Init(GPIOA, &amp;GPIO_InitStruct);
    __HAL_RCC_GPIOB_CLK_ENABLE();
    GPIO_InitStruct.Pin = GPIO_PIN_6;
    HAL_GPIO_Init(GPIOB, &amp;GPIO_InitStruct);
    __HAL_RCC_GPIOC_CLK_ENABLE();
    GPIO_InitStruct.Pin = GPIO_PIN_7;
    HAL_GPIO_Init(GPIOC, &amp;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&lt;240;i++)
        {
           for(j=0;j&lt;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">&nbsp;</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:&quot;Calibri&quot;,&quot;sans-serif&quot;">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:&quot;Calibri&quot;,&quot;sans-serif&quot;">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:&quot;Calibri&quot;,&quot;sans-serif&quot;">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

<p>美女可以,就是分辨率不行。</p>

jinglixixi 发表于 2020-12-25 20:11

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>

w494143467 发表于 2020-12-26 10:41

<p>我觉得这个屏幕更适合我。哈哈!</p>

jinglixixi 发表于 2020-12-26 11:02

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>

w494143467 发表于 2020-12-26 17:43

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>

jinglixixi 发表于 2020-12-26 20:23

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>

okhxyyo 发表于 2020-12-28 11:00

<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&nbsp;</a>、</p>
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