1
當我在閃存設備使用此結構後,它工作正常,但重新啓動(開機/關機)使用此結構(分配給任何位)後會導致HardFault irq。我使用Keil uVision和STM32F205。爲什麼它不起作用?以及我應該更改/刪除/添加以修復它?直接使用GPIOC-> ODR不會引起任何問題Kail中的位域有什麼問題?重新啓動後位字段keil硬故障
#pragma anon_unions
typedef union {
struct {
__IO uint16_t Data_Bus:8; // 0-7 data bus
__IO uint16_t Ctr_Pins:6; // 8-13 control pins
__IO uint16_t :2; // 14-15 unused here
};
struct {
__IO uint16_t D0:1; // 0 data bus pin
__IO uint16_t D1:1; // 1 data bus pin
__IO uint16_t D2:1; // 2 data bus pin
__IO uint16_t D3:1; // 3 data bus pin
__IO uint16_t D4:1; // 4 data bus pin
__IO uint16_t D5:1; // 5 data bus pin
__IO uint16_t D6:1; // 6 data bus pin
__IO uint16_t D7:1; // 7 data bus pin
// --------------------------------
__IO uint16_t RS:1; // 8 reset
__IO uint16_t CS:1; // 9 chip select
__IO uint16_t CD:1; // 10 control/data
__IO uint16_t RD:1; // 11 read tick
__IO uint16_t WR:1; // 12 write tick
__IO uint16_t EN:1; // 13 enable display
// ---------------------------------
__IO uint16_t :1; // 14 unused
__IO uint16_t LD:1; // 15 led
};
} *PC_STRUCT_PTR, PC_STRUCT;
PC_STRUCT_PTR __TMP = (PC_STRUCT_PTR)(GPIOC_BASE+0x14);
#define PINOUTS (*__TMP)
它的使用是這樣的:
void Write_Reg(unsigned char command)
{
PINOUTS.CD = 0; PINOUTS.RD = 1; PINOUTS.CS = 0; PINOUTS.WR = 0;
PINOUTS.Data_Bus = command; wait();
PINOUTS.WR = 1; PINOUTS.CS = 1; PINOUTS.CD = 1; wait();
}