STM32 Getting Started: Lighting

Operation on pins:

E.g. light up the LED light:

1. First, you need to know the pins corresponding to the LED lights, find its module block diagram and clock tree in the datasheet of the corresponding chip, find the parent clock and turn it on. Then initialize it with the structure, and configure the corresponding parameters according to your needs during initialization. 

The clock tree of the ZET6 datasheet is as follows:

Module diagram:

2. Initialize it using the initialization function.

3. Find the schematic diagram and find out whether the component to be operated requires a high level or a low level. For example, the LED light here requires a high level, and the level can be raised through the void GPIO_SetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) function.

If the component requires a low level, you can pull the level low through the void GPIO_ResetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) function.

The level can also be set directly through bit operations.

Use the void GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, BitAction BitVal) function to directly write all the level conditions of a module.

The operation is as follows:

For example, you want to set GPIO_Pin_10 to a high level.

You can use GPIO_SetBits(GPIOA,GPIO_Pin_10);

You can also use GPIO_WriteBit(0x01<<10);

Above code:

void Led_Init()

{

GPIO_InitTypeDef GPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_13;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed ​​= GPIO_Speed_50MHz;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE, ENABLE);

GPIO_Init(GPIOE, &GPIO_InitStructure);

}