我正试图用STM32CubeF7中的BSP库在stm32f769i disco的LED上显示一个字符串。然而,什么也没发生。代码如下:

#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;
}

如果我取消对LCDInit的调用,我的LED就会切换,如果我调用LCDInit,什么都不会发生(LED不会切换),LCD会保持黑色。有什么想法吗?
我基本上试过按照stm32f769i_discovery_lcd.c中的说明操作,但没有成功:
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:使用OpenOCD调试时,如果我在BSP_LCD_Init()行设置断点,gdb将挂起。如果我再次运行调试器,我可以看到程序被困在WWDG_IRQHandler()中。

最佳答案

如果这对任何人都有帮助的话,我将发布我的问题(哈尔图书馆):
我没有特别添加任何处理重写中断处理程序的代码,结果甚至HAL_init()调用也被阻止,因为我没有添加以下内容:

void SysTick_Handler(void)
{
     HAL_IncTick();
}

因为这个,我的HAL_Delay将永远等待。开始时最好使用STM32CubeF7 templates文件夹中提供的模板,这样您就不会像我一样犯同样的错误。。

关于c - STM32CubeF7 BSP LCD尝试,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/45387942/

10-11 21:06