[Ateli Development Board AT32F421 Review] + Buttons are coming

西点钟灵毓秀

[Ateli Development Board AT32F421 Review] + Buttons are coming [Copy link]

 

As you can see, it may be written simply. In fact, it is indeed very simple .

Please read the program and slowly understand it. This is for those who have some basic knowledge, so please don't watch it.

Buttons, don’t think they are just buttons. In industrial control, most sensors also use button functions. High and low level conversion outputs are button inputs for MCU.

The button code still uses the original STM32F030C8T6 template.

Button initialization code:

#if KEY1_EN

/* Enable the key port clock */
RCC_AHBPeriphClockCmd( KEY1_GPIO_CLK, ENABLE );
/* Configure the KEY pin as input */
GPIO_StructInit( &GPIO_InitStructure );

//Select the key pin
GPIO_InitStructure.GPIO_Pins = KEY1_GPIO_PIN;
// Set the key pin
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; // Set input
GPIO_InitStructure.GPIO_Pull = GPIO_Pull_NOPULL; // Pull down // GPIO_PuPd_NOPULL GPIO_PuPd_DOWN
GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
// Use the structure to initialize the key
GPIO_Init( KEY1_GPIO_PORT, &GPIO_InitStructure );
#endif

Finally, upload the button source code. A button test function is made in the main function.

freebsder

Come on, thank you for sharing, looking forward to the follow-up!