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/*
*********************************************************************************************************
* uC/OS-II
* The Real-Time Kernel
*
*
* (c) Copyright 2009-2010; Micrium, Inc.; Weston, FL
* All rights reserved. Protected by international copyright laws.
*
* ARM Cortex-M4 Port
*
* File : OS_CPU_C.C
* Version : V2.92
* By : JJL
* BAN
*
* LICENSING TERMS:
* ---------------
* uC/OS-III is provided in source form to registered licensees ONLY. It is
* illegal to distribute this source code to any third party unless you receive
* written permission by an authorized Micrium representative. Knowledge of
* the source code may NOT be used to develop a similar product.
*
* Please help us continue to provide the Embedded community with the finest
* software available. Your honesty is greatly appreciated.
*
* You can contact us at www.micrium.com.
*
* For : ARMv7 Cortex-M4
* Mode : Thumb-2 ISA
* Toolchain : IAR EWARM
*********************************************************************************************************
*/
#define OS_CPU_GLOBALS
#ifdef VSC_INCLUDE_SOURCE_FILE_NAMES
const CPU_CHAR *os_cpu_c__c = "$Id: $";
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* INCLUDE FILES
*********************************************************************************************************
*/
#include <ucos_ii.h>
//#include <lib_def.h> //这个是ucos官方自带的外设标准C库的头文件 ，我们这里不用，所以需要添加其包含的宏定义
//--------------------------------------------------------------------------------------------------------------------------
// uclib的一些定义
// —— by 野火嵌入式开发
//<lib_def.h>包含的宏定义
#define DEF_BIT_FIELD(bit_field, bit_shift) ((((bit_field) >= DEF_INT_CPU_NBR_BITS) ? (DEF_INT_CPU_U_MAX_VAL) \
: (DEF_BIT(bit_field) - 1uL)) \
<< (bit_shift))
#define DEF_INT_CPU_NBR_BITS (CPU_CFG_DATA_SIZE * DEF_OCTET_NBR_BITS)
#define DEF_INT_CPU_U_MAX_VAL DEF_INT_32U_MAX_VAL
#define DEF_BIT(bit) (1uL << (bit))
#define DEF_OCTET_NBR_BITS 8
#define DEF_INT_32U_MAX_VAL 4294967295uL
#define DEF_BIT_MASK(bit_mask, bit_shift) ((bit_mask) << (bit_shift))
//<lib_def.h>包含的宏定义需要用到<cpu.h>所包含的宏定义
#define CPU_CFG_DATA_SIZE CPU_WORD_SIZE_32 /* Defines CPU data word size (in octets). */
//<lib_def.h>包含的宏定义需要用到<cpu_def.h>所包含的宏定义
#define CPU_WORD_SIZE_32 4u /* 32-bit word size (in octets). */
//--------------------------------------------------------------------------------------------------------------------------
/*
*********************************************************************************************************
* LOCAL VARIABLES
*********************************************************************************************************
*/
#if OS_TMR_EN > 0u
static INT16U OSTmrCtr;
#endif
/*
*********************************************************************************************************
* SYS TICK DEFINES
*********************************************************************************************************
*/
#define OS_CPU_CM3_NVIC_ST_CTRL (*((volatile INT32U *)0xE000E010uL)) /* SysTick Ctrl & Status Reg. */
#define OS_CPU_CM3_NVIC_ST_RELOAD (*((volatile INT32U *)0xE000E014uL)) /* SysTick Reload Value Reg. */
#define OS_CPU_CM3_NVIC_ST_CURRENT (*((volatile INT32U *)0xE000E018uL)) /* SysTick Current Value Reg. */
#define OS_CPU_CM3_NVIC_ST_CAL (*((volatile INT32U *)0xE000E01CuL)) /* SysTick Cal Value Reg. */
#define OS_CPU_CM3_NVIC_SHPRI1 (*((volatile INT32U *)0xE000ED18uL)) /* System Handlers 4 to 7 Prio. */
#define OS_CPU_CM3_NVIC_SHPRI2 (*((volatile INT32U *)0xE000ED1CuL)) /* System Handlers 8 to 11 Prio. */
#define OS_CPU_CM3_NVIC_SHPRI3 (*((volatile INT32U *)0xE000ED20uL)) /* System Handlers 12 to 15 Prio. */
#define OS_CPU_CM3_NVIC_ST_CTRL_COUNT 0x00010000uL /* Count flag. */
#define OS_CPU_CM3_NVIC_ST_CTRL_CLK_SRC 0x00000004uL /* Clock Source. */
#define OS_CPU_CM3_NVIC_ST_CTRL_INTEN 0x00000002uL /* Interrupt enable. */
#define OS_CPU_CM3_NVIC_ST_CTRL_ENABLE 0x00000001uL /* Counter mode. */
#define OS_CPU_CM3_NVIC_PRIO_MIN 0xFFu /* Min handler prio. */
/*
*********************************************************************************************************
* OS INITIALIZATION HOOK
* (BEGINNING)
*
* Description: This function is called by OSInit() at the beginning of OSInit().
*
* Arguments : none
*
* Note(s) : 1) Interrupts should be disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void OSInitHookBegin (void)
{
INT32U size;
OS_STK *pstk;
/* Clear exception stack for stack checking.*/
pstk = &OS_CPU_ExceptStk[0];
size = OS_CPU_EXCEPT_STK_SIZE;
while (size > 0u)
{
size--;
*pstk++ = (OS_STK)0;
}
OS_CPU_ExceptStkBase = &OS_CPU_ExceptStk[OS_CPU_EXCEPT_STK_SIZE - 1u];
#if OS_TMR_EN > 0u
OSTmrCtr = 0u;
#endif
}
#endif
/*
*********************************************************************************************************
* OS INITIALIZATION HOOK
* (END)
*
* Description: This function is called by OSInit() at the end of OSInit().
*
* Arguments : none
*
* Note(s) : 1) Interrupts should be disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void OSInitHookEnd (void)
{
}
#endif
/*
*********************************************************************************************************
* TASK CREATION HOOK
*
* Description: This function is called when a task is created.
*
* Arguments : ptcb is a pointer to the task control block of the task being created.
*
* Note(s) : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void OSTaskCreateHook (OS_TCB *ptcb)
{
#if OS_APP_HOOKS_EN > 0u
App_TaskCreateHook(ptcb);
#else
(void)ptcb; /* Prevent compiler warning */
#endif
}
#endif
/*
*********************************************************************************************************
* TASK DELETION HOOK
*
* Description: This function is called when a task is deleted.
*
* Arguments : ptcb is a pointer to the task control block of the task being deleted.
*
* Note(s) : 1) Interrupts are disabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void OSTaskDelHook (OS_TCB *ptcb)
{
#if OS_APP_HOOKS_EN > 0u
App_TaskDelHook(ptcb);
#else
(void)ptcb; /* Prevent compiler warning */
#endif
}
#endif
/*
*********************************************************************************************************
* IDLE TASK HOOK
*
* Description: This function is called by the idle task. This hook has been added to allow you to do
* such things as STOP the CPU to conserve power.
*
* Arguments : none
*
* Note(s) : 1) Interrupts are enabled during this call.
*********************************************************************************************************
*/
#if OS_CPU_HOOKS_EN > 0u
void OSTaskIdleHook (void)
{
#if OS_APP_HOOKS_EN > 0u
App_TaskIdleHook();
#endif
}
#endif
/*
*********************************************************************************************************
* TASK RETURN HOOK
*
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