📄 os_cpu_c.c
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/****************************************Copyright (c)**************************************************
** Guangzhou ZHIYUAN electronics Co.,LTD.
**
** http://www.embedtools.com
**
**--------------File Info-------------------------------------------------------------------------------
** File Name: OS_Cpu_C.c
** Last modified Date: 2007-01-18
** Last Version: 1.0
** Description: The C functions that a uC/OS-II port requires uC/OS-II移植所需要的C函数
**
**------------------------------------------------------------------------------------------------------
** Created By: Steven Zhou 周绍刚
** Created date: 2007-01-18
** Version: 1.0
** Descriptions: The original version 初始版本
**
**------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Description:
**
********************************************************************************************************/
#define OS_CPU_GLOBALS
#include <ucos_ii.h>
/********************************************************************************************************
* Local variables 局部变量 *
********************************************************************************************************/
#if OS_TMR_EN > 0
static INT16U OSTmrCtr;
#endif
/*********************************************************************************************************
** Function name: OSInitHookBegin
**
** Descriptions: The hook function called by OSInit() at the beginning of OSInit()
** OSInit()函数刚开始执行时调用的钩子函数
**
** Input parameters: None 无
** Returned value: None 无
**
** Used global variables: OSTmrCtr
** Calling modules: None 无
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
void OSInitHookBegin (void)
{
#if OS_TMR_EN > 0
OSTmrCtr = 0;
#endif
}
#endif
/*********************************************************************************************************
** Function name: OSInitHookEnd
**
** Descriptions: The hook function called by OSInit() at the end of OSInit()
** OSInit()函数结束前调用的钩子函数
**
** Input parameters: None 无
** Returned value: None 无
**
** Used global variables: None 无
** Calling modules: None 无
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION > 203
void OSInitHookEnd (void)
{
}
#endif
/*********************************************************************************************************
** Function name: OSTaskCreateHook
**
** Descriptions: The hook function called when a task is created
** 初始化任务时调用的钩子函数
**
** Input parameters: ptcb
** Returned value: None 无
**
** Used global variables: None 无
** Calling modules: None 无
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
#if OS_CPU_HOOKS_EN > 0
void OSTaskCreateHook (OS_TCB *ptcb)
{
(void)ptcb; //Prevent compiler warning 防止编译警告
}
#endif
/*********************************************************************************************************
** Function name: OSTaskDelHook
**
** Descriptions: The hook function called when a task is deleted
** 删除任务时调用的钩子函数
**
** Input parameters: ptcb
** Returned value: None 无
**
** Used global variables: None 无
** Calling modules: None 无
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
#if OS_CPU_HOOKS_EN > 0
void OSTaskDelHook (OS_TCB *ptcb)
{
(void)ptcb; //Prevent compiler warning 防止编译警告
}
#endif
/*********************************************************************************************************
** Function name: OSTaskIdleHook
**
** Descriptions: The hook function called by the idle task
** 空闲任务调用的钩子函数
**
** Input parameters: None 无
** Returned value: None 无
**
** Used global variables: None 无
** Calling modules: None 无
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
#if OS_CPU_HOOKS_EN > 0 && OS_VERSION >= 251
void OSTaskIdleHook (void)
{
}
#endif
/*********************************************************************************************************
** Function name: OSTaskStatHook
**
** Descriptions: The hook function called every second by the statistics task
** 统计任务每秒钟调用的钩子函数
**
** Input parameters: None 无
** Returned value: None 无
**
** Used global variables: None 无
** Calling modules: None 无
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
#if OS_CPU_HOOKS_EN > 0
void OSTaskStatHook (void)
{
}
#endif
/*********************************************************************************************************
** Function name: OSTaskStkInit
**
** Descriptions: This function is called by either OSTaskCreate() or OSTaskCreateExt() to
** initialize the stack frame of the task being created.
** This function is highly processor specific.
** OSTaskCreate() 和 OSTaskCreateExt()调用本函数初始化正被创建的任务的堆栈
** 本函数和具体的处理器有关
** Input parameters: task： A pointer to the task code 任务代码的指针
** p_arg： A pointer to a user supplied data area that will be passed to the task
** when the task first executes.
** 用户提供的数据空间的指针，任务运行时会被传递给任务
** ptos: A pointer to the top of the stack. For this port, it's the highest valid
** address of the stack.
** 栈顶的指针。对于本移植，它指向堆栈的最高有效地址。
** opt: Specified options that can be used to alter the behavior of OSTaskStkInit().
* (see uCOS_II.H for OS_TASK_OPT_xxx).
** 特定选项，可以改变对OSTaskStkInit()的使用方法。
** (参看 uCOS_II.H 中的 OS_TASK_OPT_xxx).
** Returned value: The new location of top-of-stack 新栈顶指针位置
**
** Used global variables: None 无
** Calling modules: None 无
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
OS_STK *OSTaskStkInit (void (*task)(void *p_arg), void *p_arg, OS_STK *ptos, INT16U opt)
{
OS_STK *stk;
(void)opt; // 'opt' is not used, prevent warning 没有用'opt'，防止编译警
stk = ptos; // Load stack pointer 装载堆栈指针
// Registers stacked as if auto-saved on exception
// 模拟成异常，自动把寄存器压栈
*(stk) = (INT32U)0x01000000L; // xPSR
*(--stk) = (INT32U)task; // Entry Point of the task 任务入口地址
*(--stk) = (INT32U)0xFFFFFFFEL; // R14 (LR) (init value will cause fault if ever used)
*(--stk) = (INT32U)0x12121212L; // R12
*(--stk) = (INT32U)0x03030303L; // R3
*(--stk) = (INT32U)0x02020202L; // R2
*(--stk) = (INT32U)0x01010101L; // R1
*(--stk) = (INT32U)p_arg; // R0 : argument 输入参数
// Remaining registers saved on process stack
// 剩下的寄存器保存到堆栈
*(--stk) = (INT32U)0x11111111L; // R11
*(--stk) = (INT32U)0x10101010L; // R10
*(--stk) = (INT32U)0x09090909L; // R9
*(--stk) = (INT32U)0x08080808L; // R8
*(--stk) = (INT32U)0x07070707L; // R7
*(--stk) = (INT32U)0x06060606L; // R6
*(--stk) = (INT32U)0x05050505L; // R5
*(--stk) = (INT32U)0x04040404L; // R4
return (stk);
}
/*********************************************************************************************************
** Function name: OSTaskSwHook
**
** Descriptions: The hook function called when a task switch is performed.
** 任务切换时前调用的钩子函数
**
** Input parameters: None 无
** Returned value: None 无
**
** Used global variables: None 无
** Calling modules: None 无
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
void OSTaskSwHook (void)
{
}
/*********************************************************************************************************
** Function name: OSTCBInitHook
**
** Descriptions: The hook function called by OS_TCBInit()
** OS_TCBInit()调用的钩子函数
**
** Input parameters: ptcb
** Returned value: None 无
**
** Used global variables: None 无
** Calling modules: None 无
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
#if (OS_CPU_HOOKS_EN > 0) && (OS_VERSION > 203)
void OSTCBInitHook (OS_TCB *ptcb)
{
(void)ptcb; //Prevent compiler warning 防止编译警告
}
#endif
/*********************************************************************************************************
** Function name: OSTimeTickHook
**
** Descriptions: The hook function called every tick
** 每个节拍调用的钩子函数
**
** Input parameters: ptcb
** Returned value: None 无
**
** Used global variables: OSTmrCtr，OS_TICKS_PER_SEC，OS_TMR_CFG_TICKS_PER_SEC
** Calling modules: OSTmrSignal
**
** Created by: Steven Zhou 周绍刚
** Created Date: 2007-01-18
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
#if ((OS_CPU_HOOKS_EN > 0) && (OS_TIME_TICK_HOOK_EN > 0)) || (OS_VERSION < 283)
void OSTimeTickHook (void)
{
#if OS_TMR_EN > 0
OSTmrCtr++;
if (OSTmrCtr >= (OS_TICKS_PER_SEC / OS_TMR_CFG_TICKS_PER_SEC)) {
OSTmrCtr = 0;
OSTmrSignal();
}
#endif
}
#endif
/*********************************************************************************************************
* End Of File *
*********************************************************************************************************/
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