How to add .cpp and .h files to the project of stm32cubeide?

[OMaka.1]

1) I added to folder Core/Inc file my_lib.h

2) Added to folder Core/Src file my_lib.cpp

3) I added #include "my_lib.cpp" to main.cpp

In tmy_lib.cpp I have only one class for testing. This class works with PWM.

When I compile project I get errors that such names are not found:

TIM_Channel_1, htim, uint32_t, so on...

So, it seems that this my_lib.h is compiled first and before default libraries goted by CubeMX. How to solve this problem and to compile added file at the end of the project?

[TDK]

Don't #include source files from other source files. That's now how C or C++ is intended to work.

At the beginning of files that use HAL, #include "stm32f4xx_hal.h" or similar. Don't #include any other HAL files.

[OMaka.1]

Thank you for your answer, it's helped a little. But may be I'm doint something wrong.

I got error "undefined reference to class:

c:\st\stm32cubeide_1.7.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: E:/STM/les_4_4_PWM_output/Debug/../Core/Src/main.cpp:177: undefined reference to `PWM::PWM()'
c:\st\stm32cubeide_1.7.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: E:/STM/les_4_4_PWM_output/Debug/../Core/Src/main.cpp:177: undefined reference to `PWM::PWM()'
c:\st\stm32cubeide_1.7.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: E:/STM/les_4_4_PWM_output/Debug/../Core/Src/main.cpp:177: undefined reference to `PWM::PWM()'
c:\st\stm32cubeide_1.7.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: E:/STM/les_4_4_PWM_output/Debug/../Core/Src/main.cpp:193: undefined reference to `PWM::SoftBlink(TIM_HandleTypeDef*, unsigned long, int, unsigned long)'
c:\st\stm32cubeide_1.7.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: E:/STM/les_4_4_PWM_output/Debug/../Core/Src/main.cpp:194: undefined reference to `PWM::SoftBlink(TIM_HandleTypeDef*, unsigned long, int, unsigned long)'
c:\st\stm32cubeide_1.7.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: E:/STM/les_4_4_PWM_output/Debug/../Core/Src/main.cpp:195: undefined reference to `PWM::SoftBlink(TIM_HandleTypeDef*, unsigned long, int, unsigned long)'
c:\st\stm32cubeide_1.7.0\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: E:/STM/les_4_4_PWM_output/Debug/../Core/Src/main.cpp:196: undefined reference to `PWM::SoftBlink(TIM_HandleTypeDef*, unsigned long, int, unsigned long)'
collect2.exe: error: ld returned 1 exit status

I have added such .h file Core/Inc/mypwm.h

#ifndef INC_MYPWM_H_
#define INC_MYPWM_H_
#include "stm32f3xx_hal.h"
 
class PWM {
	protected:
		int32_t ch_dir; 
	private:
		uint32_t CH_DC; 
	public:
		PWM(); 
		void SoftBlink(TIM_HandleTypeDef *htim, uint32_t Channel, int step, uint32_t max_ARR);
 
}; // end class
#endif /* INC_MYPWM_H_ */

and Core/Src/mypwm.cpp is:

#include "stm32f3xx_hal.h"
#include "assert.h"
 
class PWM {
	protected:
		int32_t ch_dir; // =1 - increase pwm, -1 - decreese pwm
	private:
		uint32_t CH_DC; // max Auto Reload Register (ARR)
	public:
		PWM() // кон�?труктор за умовчуванн�?м
		{
			ch_dir=1;
			CH_DC=0;
		}
		void SoftBlink(TIM_HandleTypeDef *htim, uint32_t Channel, int step, uint32_t max_ARR){
			 while ((CH_DC < max_ARR) & (ch_dir >=0)) {
			 	switch (Channel){
			 		case TIM_CHANNEL_1 : {
			 			htim->Instance->CCR1 = CH_DC;
			 			break;
			 		}
			 		case TIM_CHANNEL_2 : {
			 			htim->Instance->CCR2 = CH_DC;
			 			break;
			 		}
			 		case TIM_CHANNEL_3 : {
			 			htim->Instance->CCR3 = CH_DC;
			 			break;
			 		}
			 		case TIM_CHANNEL_4 : {
			 			htim->Instance->CCR4 = CH_DC;
			 			break;
			 		}
			 		default :
			 			assert(0);
			 	} // end_switch
			 		CH_DC += step;
				 	HAL_Delay(1);
			 } // end_while
 
			 while ((CH_DC > 0) & (ch_dir <0)) {
			 	switch (Channel){
			 		case TIM_CHANNEL_1 : {
			 			htim->Instance->CCR1 = CH_DC;
			 			break;
			 		}
			 		case TIM_CHANNEL_2 : {
			 			htim->Instance->CCR2 = CH_DC;
			 			break;
			 		}
			 		case TIM_CHANNEL_3 : {
			 			htim->Instance->CCR3 = CH_DC;
			 			break;
			 		}
			 		case TIM_CHANNEL_4 : {
			 			htim->Instance->CCR4 = CH_DC;
			 			break;
			 		}
			 	} // end_switch
			 	CH_DC -=step;
			 	HAL_Delay(1);
			 } // end_while
			 if (ch_dir>=0) {
				 ch_dir =-1;
			 }
			 else {
				 ch_dir=1;
			 }
		 } //end SoftBlink
}; // end class

I don't anderstand what I'm doing wrong.

In the main.cpp I make

#include "mypwm.h"

[OMaka.1]

OK, problem was solved.

I was wrong in syntax of classes in additional files. Now everything works fine.

[TDK]

Make sure mypwm.cpp is being compiled. Look in the build log.

Try to right click the project and clean/refresh.