联合体位域在GPIO中的妙用

只看该作者 · 2024-6-17 21:30

本帖最后由袁胜富于 2024-9-3 10:51 编辑

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typedef union
{
      volatile uint32_t all;
      struct
      {
            volatile uint32_t bit0:1;
            volatile uint32_t bit1:1;
            volatile uint32_t bit2:1;
            volatile uint32_t bit3:1;
            volatile uint32_t bit4:1;
            volatile uint32_t bit5:1;
            volatile uint32_t bit6:1;
            volatile uint32_t bit7:1;
            volatile uint32_t bit8:1;
            volatile uint32_t bit9:1;
            volatile uint32_t bit10:1;
            volatile uint32_t bit11:1;
            volatile uint32_t bit12:1;
            volatile uint32_t bit13:1;
            volatile uint32_t bit14:1;
            volatile uint32_t bit15:1;
            volatile uint32_t :16;//占位，不使用
      }bit;
      struct
      {
            volatile uint32_t bytes0:8;
            volatile uint32_t bytes1:8;
            volatile uint32_t bytes2:8;
            volatile uint32_t bytes3:8;
      }bytes;
}GPIO_Bit_Field_TypeDef;

#define    PA_OUT                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x4001080C)))
#define    PAOut(n)                      (PA_OUT->bit.bit##n)

#define    PB_OUT                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x40010C0C)))
#define    PBOut(n)                      (PB_OUT->bit.bit##n)

#define    PC_OUT                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x4001100C)))
#define    PCOut(n)                      (PC_OUT->bit.bit##n)

#define    PD_OUT                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x4001140C)))
#define    PDOut(n)                      (PD_OUT->bit.bit##n)

#define    PE_OUT                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x4001180C)))
#define    PEOut(n)                      (PE_OUT->bit.bit##n)

#define    PF_OUT                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x40011C0C)))
#define    PFOut(n)                      (PF_OUT->bit.bit##n)

#define    PA_IN                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x40010808)))
#define    PAIn(n)                         (PA_IN->bit.bit##n)

#define    PB_IN                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x40010C08)))
#define    PBIn(n)                         (PB_IN->bit.bit##n)

#define    PC_IN                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x40011008)))
#define    PCIn(n)                         (PC_IN->bit.bit##n)

#define    PD_IN                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x40011408)))
#define    PDIn(n)                         (PD_IN->bit.bit##n)

#define    PE_IN                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x40011808)))
#define    PEIn(n)                         (PE_IN->bit.bit##n)

#define    PF_IN                               ((GPIO_Bit_Field_TypeDef*)((volatile uint32_t  *)(0x40011C08)))
#define    PFIn(n)                         (PF_IN->bit.bit##n)
#define                                                       LED2                                     PBOut(7)
#define                                                       LED3                                     PBOut(8)
#define                                                       LED4                                     PBOut(9)

__weak void application_entry(void *arg)
{
while (1) {
      printf("This is a demo task,please use your task entry!\r\n");
                              LED2 =!LED2;
                              LED3 =!LED3;
                              LED4 =!LED4;
      tos_task_delay(100);
}
}