位域KEIL hardfault后重新启动 [英] Bit fields keil hardfault after restarting
问题描述
当我用这个结构只是闪光装置效果很好后，但在重新启动使用此结构（开/关电源）后（分配给任何位）导致HardFault IRQ。我使用的Keil uVision与STM32F205。为什么不工作？和我应该怎么更改/删除/添加到解决这个问题？直接使用GPIOC-> ODR不会引起任何问题，什么是错的，在凯尔位域？
的#pragma anon_unions工会的typedef {
结构{
__IO uint16_t Data_Bus：8; // 0-7数据总线
__IO uint16_t Ctr_Pins：6; // 8-13控制引脚
__IO uint16_t：2; // 14-15不用在这里
};
结构{
__IO uint16_t D0：1; // 0数据总线引脚
__IO uint16_t D1：1; // 1数据总线引脚
__IO uint16_t D2：1; // 2数据总线引脚
__IO uint16_t D3：1; // 3数据总线引脚
__IO uint16_t D4：1; // 4数据总线引脚
__IO uint16_t D5：1; // 5的数据总线引脚
__IO uint16_t D6：1; // 6数据总线引脚
__IO uint16_t D7：1; // 7数据总线引脚
// --------------------------------
__IO uint16_t RS：1; // 8复位
__IO uint16_t CS：1; // 9片选
__IO uint16_t CD：1; // 10控制/数据
__IO uint16_t RD：1; // 11读刻度
__IO uint16_t WR：1; // 12剔写
__IO uint16_t EN：1; // 13使得显示
// ---------------------------------
__IO uint16_t：1; // 14未使用
__IO uint16_t LD：1; // 15个LED
};
} * PC_STRUCT_PTR，PC_STRUCT;PC_STRUCT_PTR __TMP =（PC_STRUCT_PTR）（GPIOC_BASE + 0×14）;
＃定义引脚配置（* __ TMP）
它的使用是这样的：
无效WRITE_REG（无符号字符命令）
{
PINOUTS.CD = 0; PINOUTS.RD = 1; PINOUTS.CS = 0; PINOUTS.WR = 0;
PINOUTS.Data_Bus =命令;等待（）;
PINOUTS.WR = 1; PINOUTS.CS = 1; PINOUTS.CD = 1;等待（）;
}
在文件'startup_stm32f20x.s，请确保您有以下一段code的：
EXTERN HardFault_Handler_C;这个声明可能缺失__tx_vectors;这个声明可能是有
DCD HardFault_Handler
然后，在同一文件中，添加以下中断处理程序（所有其他处理程序位于）：
PUBWEAK HardFault_Handler
.text段：code：REORDER（1）
HardFault_Handler
TST LR，＃4
ITE EQ
MRSEQ R0，MSP
MRSNE R0，PSP
乙HardFault_Handler_C
然后，在文件'stm32f2xx.c，添加以下ISR：
无效HardFault_Handler_C（unsigned int类型* hardfault_args）
{
的printf（R0 =为0x％.8X \\ r \\ n，hardfault_args [0]）;
的printf（R1 =为0x％.8X \\ r \\ n，hardfault_args [1]）;
的printf（R2 =为0x％.8X \\ r \\ n，hardfault_args [2]）;
的printf（R3 =为0x％.8X \\ r \\ n，hardfault_args [3]）;
的printf（R12 =为0x％.8X \\ r \\ n，hardfault_args [4]）;
的printf（LR =为0x％.8X \\ r \\ n，hardfault_args [5]）;
的printf（PC =为0x％.8X \\ r \\ n，hardfault_args [6]）;
的printf（PSR =为0x％.8X \\ r \\ n，hardfault_args [7]）;
的printf（BFAR =为0x％.8X \\ r \\ n，*（unsigned int类型*）0xE000ED38）;
的printf（CFSR =为0x％.8X \\ r \\ n，*（unsigned int类型*）0xE000ED28）;
的printf（HFSR =为0x％.8X \\ r \\ n，*（unsigned int类型*）0xE000ED2C）;
的printf（DFSR =为0x％.8X \\ r \\ n，*（unsigned int类型*）0xE000ED30）;
的printf（AFSR =为0x％.8X \\ r \\ n，*（unsigned int类型*）0xE000ED3C）;
的printf（SHCSR =为0x％.8X \\ r \\ n，SCB-＆GT; SHCSR）;
而（1）;
}
如果您可以在执行时，这个特定的硬盘故障中断时不能使用的printf 的点，然后保存所有上述数据在全球缓冲区，而不是，这样你就可以到达后查看它的而（1）。
然后，请参阅Cortex-M的故障异常和寄存器在 HTTP部分： //www.keil.com/appnotes/files/apnt209.pdf 为了如果你想进一步援助，以了解这里的问题，或发布的输出。
When I use this struct just after flashing device it works well, but after restarting (power on/off) using this struct(assign to any bit) cause a HardFault irq. I use Keil uVision with STM32F205. Why it not works? and what should I change/remove/add to fix it? Direct using GPIOC->ODR don't cause any problems what is wrong with bitfields in Kail?
#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)
it's used like this:
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();
}
In file 'startup_stm32f20x.s', make sure that you have the following piece of code:
EXTERN HardFault_Handler_C ; this declaration is probably missing
__tx_vectors ; this declaration is probably there
DCD HardFault_Handler
Then, in the same file, add the following interrupt handler (where all other handlers are located):
PUBWEAK HardFault_Handler
SECTION .text:CODE:REORDER(1)
HardFault_Handler
TST LR, #4
ITE EQ
MRSEQ R0, MSP
MRSNE R0, PSP
B HardFault_Handler_C
Then, in file 'stm32f2xx.c', add the following ISR:
void HardFault_Handler_C(unsigned int* hardfault_args)
{
printf("R0 = 0x%.8X\r\n",hardfault_args[0]);
printf("R1 = 0x%.8X\r\n",hardfault_args[1]);
printf("R2 = 0x%.8X\r\n",hardfault_args[2]);
printf("R3 = 0x%.8X\r\n",hardfault_args[3]);
printf("R12 = 0x%.8X\r\n",hardfault_args[4]);
printf("LR = 0x%.8X\r\n",hardfault_args[5]);
printf("PC = 0x%.8X\r\n",hardfault_args[6]);
printf("PSR = 0x%.8X\r\n",hardfault_args[7]);
printf("BFAR = 0x%.8X\r\n",*(unsigned int*)0xE000ED38);
printf("CFSR = 0x%.8X\r\n",*(unsigned int*)0xE000ED28);
printf("HFSR = 0x%.8X\r\n",*(unsigned int*)0xE000ED2C);
printf("DFSR = 0x%.8X\r\n",*(unsigned int*)0xE000ED30);
printf("AFSR = 0x%.8X\r\n",*(unsigned int*)0xE000ED3C);
printf("SHCSR = 0x%.8X\r\n",SCB->SHCSR);
while (1);
}
If you can't use printf at the point in the execution when this specific Hard-Fault interrupt occurs, then save all the above data in a global buffer instead, so you can view it after reaching the while (1).
Then, refer to the 'Cortex-M Fault Exceptions and Registers' section at http://www.keil.com/appnotes/files/apnt209.pdf in order to understand the problem, or publish the output here if you want further assistance.
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