1. Mx6u bare metal program (4) - GPIO module

The difference here is ：

（1） Engineering management

（2）GPIO modularization , It's like stm32 equally .

  This is a GPIO Initialization function , Examples of input parameters are included （GPIO1,3,&led_config）, Denotes initialization GPIO1 The third triangle of , And initialized led The structure of the body , Through this structure, initialization can be carried out, including input and output , High and low level . as follows ：

Here is initialization GPIO1 Triangle of is output , And output low level .

GPIO The pin reads the potential value function （ Used to judge whether the key is pressed ）

for example , The key judgment here is realized through this function

 

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 GPIO Pin write potential value function （ Used to control the output level ）

 

  for example ： There is no change in the control register led Output , Instead, write directly through this function

summary ：

adopt GPIO The module can realize that the register is no longer manipulated , It's simpler , Don't remember the register location