STM32CubeF7 BSP LCD尝试(STM32CubeF7 BSP LCD attempt)

2019-10-29 02:10发布

我试图显示与来自STM32CubeF7 BSP库stm32f769i迪斯科的LED串。 然而,没有任何反应。 下面是代码:

#include "stm32f7xx_hal.h"
#include "stm32f769i_discovery.h"
#include "stm32f769i_discovery_lcd.h"
#include "stm32f7xx.h"
#include <stdio.h>

char str[] = "Hello from BSP LCD demo!";

void LCDInit() {
    // Initialize the LCD using the BSP_LCD_Init() function.
    BSP_LCD_Init();

    // Select the LCD layer to be used using the BSP_LCD_SelectLayer() function.
    //BSP_LCD_SelectLayer(0);
    BSP_LCD_LayerDefaultInit(LTDC_DEFAULT_ACTIVE_LAYER, LCD_FB_START_ADDRESS);
    BSP_LCD_SelectLayer(LTDC_DEFAULT_ACTIVE_LAYER);

    // Enable the LCD display using the BSP_LCD_DisplayOn() function.
    BSP_LCD_DisplayOn();

    // Clear the whole LCD using BSP_LCD_Clear() function or only one specified string line using the BSP_LCD_ClearStringLine() function.
    BSP_LCD_Clear(LCD_COLOR_LIGHTGRAY);
    HAL_Delay(1000);

    BSP_LCD_SetBackColor(LCD_COLOR_LIGHTGRAY);
    BSP_LCD_SetTextColor(LCD_COLOR_WHITE);

    // Display a character on the specified line and column using the BSP_LCD_DisplayChar() function or a complete string line using the BSP_LCD_DisplayStringAtLine() function.
    BSP_LCD_DisplayStringAt(100, 100, str, CENTER_MODE);
}

int main(void) {
    LCDInit();
    BSP_LED_Init(LED_GREEN);

    while(1) {
        for (int i=0;i<1000000;i++);
        BSP_LED_Toggle(LED_GREEN);
    }

    return 0;
}

如果我删除调用LCDInit,我的LED切换,如果我叫了LCDInit,什么都不会发生(LED不切换)和LCD保持黑色。 有任何想法吗?

我基本上试图按照stm32f769i_discovery_lcd.c的说明,没有运气:

2. Driver description:
---------------------
  + Initialization steps:
     o Initialize the LCD using the BSP_LCD_Init() function.
     o Select the LCD layer to be used using the BSP_LCD_SelectLayer() function.
     o Enable the LCD display using the BSP_LCD_DisplayOn() function.

  + Options
     o Configure and enable the color keying functionality using the
       BSP_LCD_SetColorKeying() function.
     o Modify in the fly the transparency and/or the frame buffer address
       using the following functions:
       - BSP_LCD_SetTransparency()
       - BSP_LCD_SetLayerAddress()

  + Display on LCD
     o Clear the whole LCD using BSP_LCD_Clear() function or only one specified string
       line using the BSP_LCD_ClearStringLine() function.
     o Display a character on the specified line and column using the BSP_LCD_DisplayChar()
       function or a complete string line using the BSP_LCD_DisplayStringAtLine() function.
     o Display a string line on the specified position (x,y in pixel) and align mode
       using the BSP_LCD_DisplayStringAtLine() function.
     o Draw and fill a basic shapes (dot, line, rectangle, circle, ellipse, .. bitmap)
       on LCD using the available set of functions.

编辑:当OpenOCD的调试,GDB挂起如果我设置在BSP_LCD_Init()行断点。 如果我再次运行调试器,我可以看到程序停留在WWDG_IRQHandler()。

Answer 1:

在这种情况下帮助过的人,我要发布的内容竟然是我的问题(与HAL库):

我没有特别补充说,压倒一切的中断处理程序涉及的任何代码,原来连HAL_init()调用被封,因为我还没有添加以下内容:

void SysTick_Handler(void)
{
     HAL_IncTick();
}

正因为如此,我HAL_Delay的将永远等待。 可能是最好的起步时使用的STM32CubeF7提供的模板模板文件夹,所以像我一样,你不会犯同样的错误..



文章来源: STM32CubeF7 BSP LCD attempt