System configuration items

类型定义
typedef VOID(*	log_read_write_fn) (UINT32 startAddr, UINT32 space, UINT32 rwFlag, CHAR *buf)
	define the type of functions for reading or writing exception information. 更多...

函数
VOID	LOS_ExcInfoRegHook (UINT32 startAddr, UINT32 space, CHAR *buf, log_read_write_fn hook)
	Register recording exception information function. 更多...

变量
CHAR	__int_stack_start
	运行系统函数栈的开始地址 值来自于 liteos.ld中的 __int_stack_start = .; 更多...
UINT32	g_sysClock
	系统时钟,是绝大部分部件工作的时钟源，也是其他所有外设的时钟的来源 更多...
UINT32	g_tickPerSecond
	每秒Tick数,鸿蒙默认是每秒100次,即:10ms 更多...

详细描述

类型定义说明

log_read_write_fn

typedef VOID(* log_read_write_fn) (UINT32 startAddr, UINT32 space, UINT32 rwFlag, CHAR *buf)

define the type of functions for reading or writing exception information.

Description:

• This defination is used to declare the type of functions for reading or writing exception information

注意

• "startAddr" must be left to save the exception address space, the size of "buf" is "space"

参数

startAddr	[IN] Address of storage ,its must be left to save the exception address space
space	[IN] size of storage.its is also the size of "buf"
rwFlag	[IN] writer-read flag, 0 for writing,1 for reading, other number is to do nothing.
buf	[IN] the buffer of storing data.

返回值

none.

Dependency:

• los_config.h: the header file that contains the type defination.

参见

在文件 los_config.h 第 435 行定义.

函数说明

LOS_ExcInfoRegHook()

VOID LOS_ExcInfoRegHook	(	UINT32	startAddr,
		UINT32	space,
		CHAR *	buf,
		log_read_write_fn	hook
	)

Register recording exception information function.

Description:

• This API is used to Register recording exception information function, and specify location and space and size

注意

• "startAddr" must be left to save the exception address space, the size of "buf" is "space", the space of "buf" is malloc or free in user's code

参数

startAddr	[IN] Address of storage, it must be left to save the exception address space
space	[IN] size of storage space, it is also the size of "buf"
buf	[IN] the buffer of storing exception information, the space of "buf" is malloc or free in user's code
hook	[IN] the function for reading or writing exception information.

返回值

none.

Dependency:

• los_config.h: the header file that contains the API declaration.

参见

此API用于注册记录异常信息函数，并指定位置、空间和大小 startAddr: 保存发送异常的地址信息的启始地址 space: buf的大小 buf: 缓存区 hook: 读写异常信息的函数

Register recording exception information function.

在文件 los_excinfo.c 第 122 行定义.

{
    if ((hook == NULL) || (buf == NULL)) {
        PRINT_ERR("Buf or hook is null.\n");
        return;
    }
 
    g_recordAddr = startAddr;
    g_recordSpace = space;
    g_excInfoBuf = buf;
    g_excInfoRW = hook;
 
#ifdef LOSCFG_FS_VFS
    los_vfs_init();//初始化虚拟文件系统
#endif
}

函数调用图:

这是这个函数的调用关系图:

变量说明

__int_stack_start

CHAR __int_stack_start

extern

运行系统函数栈的开始地址 值来自于 liteos.ld中的 __int_stack_start = .;

int stack start addr | 值在链接时赋予,详见liteos.ld文件

g_sysClock

UINT32 g_sysClock

extern

系统时钟,是绝大部分部件工作的时钟源，也是其他所有外设的时钟的来源

system clock

在文件 los_tick.c 第 40 行定义.

g_tickPerSecond

UINT32 g_tickPerSecond

extern

每秒Tick数,鸿蒙默认是每秒100次,即:10ms

ticks per second

在文件 los_tick.c 第 41 行定义.