Question

我是STM32 MCU编程的新手，我在TrueStudio上启动了一个SPI项目。我也需要一个LCD库，因此我调整了一个与我一起使用的现有库，并在Inc和Src下添加了这些文件。

当我尝试编译时，我得到一个错误，说明在函数中第一次使用了先前未声明的定义，但是，它们已在相应的头文件中定义，并且该头文件已被定义包含在C文件中。我错过了什么？我所有的错误似乎都出现在了HD44780.c中。文件。我还要提一下，我使用CubeMX软件生成引脚定义源代码。该项目的拉链可用here。

任何帮助将不胜感激！编辑：此处列出了完整的错误消息：

Description                         Resource    Path            Location    Type
'HD44780_D4_GPIO_PORT' undeclared (first use in this function)  HD44780.c   /STM32F103C6T8_SPI/Src  line 242    C/C++ Problem
'HD44780_D5_GPIO_PORT' undeclared (first use in this function)  HD44780.c   /STM32F103C6T8_SPI/Src  line 241    C/C++ Problem
'HD44780_D6_GPIO_PORT' undeclared (first use in this function)  HD44780.c   /STM32F103C6T8_SPI/Src  line 240    C/C++ Problem
'HD44780_D7_GPIO_PORT' undeclared (first use in this function)  HD44780.c   /STM32F103C6T8_SPI/Src  line 239    C/C++ Problem
'HD44780_E_GPIO_PORT' undeclared (first use in this function)   HD44780.c   /STM32F103C6T8_SPI/Src  line 39     C/C++ Problem
'HD44780_RS_GPIO_PORT' undeclared (first use in this function)  HD44780.c   /STM32F103C6T8_SPI/Src  line 36     C/C++ Problem
'HD44780_RS_GPIO_PORT' undeclared (first use in this function)  HD44780.c   /STM32F103C6T8_SPI/Src  line 37     C/C++ Problem

Warnings
implicit declaration of function 'DELAY_Init' [-Wimplicit-function-declaration] HD44780.c   /STM32F103C6T8_SPI/Src  line 81 C/C++ Problem

Info
each undeclared identifier is reported only once for each function it appears in    HD44780.c   /STM32F103C6T8_SPI/Src  line 36 C/C++ Problem
in expansion of macro 'HD44780_E_BLINK' HD44780.c   /STM32F103C6T8_SPI/Src  line 243    C/C++ Problem
in expansion of macro 'HD44780_E_HIGH'  HD44780.c   /STM32F103C6T8_SPI/Src  line 41 C/C++ Problem
in expansion of macro 'HD44780_RS_HIGH' HD44780.c   /STM32F103C6T8_SPI/Src  line 229    C/C++ Problem
in expansion of macro 'HD44780_RS_LOW'  HD44780.c   /STM32F103C6T8_SPI/Src  line 219    C/C++ Problem

Answer 1

在main.h中，您定义的是HD44780_*_GPIO_Port而不是HD44780_*_GPIO_PORT。请注意全大写PORT。

构建错误，＆＃34;未声明（首次使用功能）＆＃34;错误，但它已被声明

1 个答案: