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- 2018-6-28
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a0a.1 0b0c
上一篇写了GPIO简单的流水灯测试,看着有点单调,习惯了串口调试,板子上没有串口 那就另想办法吧,看着LCD突然有了个想法,为什么不把调试信息输出到LCD上,以前在做2416 WINCE开发的时候就经常这样干非常直观,那说干就干。
STM32F429I-DISO SDK里已经把开发包做好,那就直接拿过来用吧。
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- #define MESSAGE1 "STM32F429I-Discoverry" //提示信息
- #define MESSAGE1_1 " GPIO TEST "
- #define MESSAGE2 " LED3 LED4 "
- #define MESSAGE2_1 " ^-^ "
- #define MESSAGE5 " LED3 = %d" //LED3状态 1亮 0灭
- #define MESSAGE6 " LED4 = %d" //LED4状态
- #define LINENUM 0x15 //行数
- #define FONTSIZE Font12x12 //字体大小
定义完了,那就该具体实现了,惯例先初始化 LCD初始化实现:
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- static void Display_Init(void)
- {
- /* Initialize the LCD */
- LCD_Init();
- LCD_LayerInit();
- /* Eable the LTDC */
- LTDC_Cmd(ENABLE);
-
- /* Set LCD Background Layer */
- LCD_SetLayer(LCD_BACKGROUND_LAYER);
-
- /* Clear the Background Layer */
- LCD_Clear(LCD_COLOR_WHITE);
-
- /* Configure the transparency for background */
- LCD_SetTransparency(0);
-
- /* Set LCD Foreground Layer */
- LCD_SetLayer(LCD_FOREGROUND_LAYER);
-
- /* Configure the transparency for foreground */
- LCD_SetTransparency(200);
-
- /* Clear the Foreground Layer */
- LCD_Clear(LCD_COLOR_WHITE);
-
- /* Set the LCD Back Color and Text Color*/
- LCD_SetBackColor(LCD_COLOR_BLUE);
- LCD_SetTextColor(LCD_COLOR_WHITE);
-
- /* Set the LCD Text size */
- LCD_SetFont(&FONTSIZE);
-
- /* Set the LCD Back Color and Text Color*/
- LCD_SetBackColor(LCD_COLOR_BLUE);
- LCD_SetTextColor(LCD_COLOR_WHITE);
-
- LCD_DisplayStringLine(LINE(LINENUM), (uint8_t*)MESSAGE1);
- LCD_DisplayStringLine(LINE(LINENUM + 1), (uint8_t*)MESSAGE1_1);
- LCD_DisplayStringLine(LINE(0x17), (uint8_t*)" ");
-
- /* Set the LCD Text size */
- LCD_SetFont(&Font16x24);
-
- LCD_DisplayStringLine(LCD_LINE_0, (uint8_t*)MESSAGE2);
- LCD_DisplayStringLine(LCD_LINE_1, (uint8_t*)MESSAGE2_1);
-
- /* Set the LCD Back Color and Text Color*/
- LCD_SetBackColor(LCD_COLOR_WHITE);
- LCD_SetTextColor(LCD_COLOR_BLUE);
- }
初始化完成了,那就改实现显示函数了
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- static void Display(void)
- {
- uint8_t led3 = 0, led4 = 0;
- uint8_t aTextBuffer[50];
-
- led3 = GPIO_ReadOutputDataBit(LED3_GPIO_PORT,LED3_PIN); //读取LED3对应引脚值
-
- sprintf((char*)aTextBuffer, MESSAGE5, led3);
- LCD_DisplayStringLine(LCD_LINE_4, (uint8_t*)aTextBuffer); //把LED3状态更新到屏幕上
-
- led4 = GPIO_ReadOutputDataBit(LED3_GPIO_PORT,LED4_PIN); //读取LED4对应引脚值
- sprintf((char*)aTextBuffer, MESSAGE6, led4);
- LCD_DisplayStringLine(LCD_LINE_6, (uint8_t*)aTextBuffer); //把LED4状态更新到屏幕上
- }
这就是显示函数,读取LED对应的值,组成字符串,最后更新到LCD,LCD显示。
接下来就改主函数了:
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- int main(void)
- {
- int i;
-
- Display_Init();
- LEDInit();
- SysTickInit();
- while (1)
- {
- Delay(500);
- GPIO_SetBits(LED4_GPIO_PORT,LED4_PIN);
- GPIO_ResetBits(LED3_GPIO_PORT,LED3_PIN);
- Display();
- Delay(500);
- GPIO_SetBits(LED3_GPIO_PORT,LED3_PIN);
- GPIO_ResetBits(LED4_GPIO_PORT,LED4_PIN);
- Display();
- }
- }
惯例,主要函数部分实现完了,那就看最终的显示结果吧.
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