/****************************************Copyright (c)******************************************************************
**                               Guangzou ZLG-MCU Development Co.,LTD.
**                                      graduate school
**                                 http://www.zlgmcu.com
**
**--------------File Info-------------------------------------------------------------------------------
** File name	: target.h
** Last modified Date	:  2004-09-17
** Last Version	:  1.0
** Descriptions	: header file of the specific codes for LPC2100 target boards
**		  Every project should include a copy of this file, user may modify it as needed
**-----------------------------------------------------------------------------------------------------
** Created by	: Chenmingji
** Created date	: 2004-02-02
** Version		: 1.0
** Descriptions	: The original version
**
**-----------------------------------------------------------------------------------------------------
** Modified by	: Chenmingji
** Modified date	: 2004-09-17
** Version		: 1.01
** Descriptions	: Renewed the template, added codes to surport more compilers 
**
**-----------------------------------------------------------------------------------------------------
** Modified by	: 
** Modified date	:
** Version		:	
** Descriptions	: 
**
************************************************************************************************************************/
#ifndef __TARGET_H 
#define __TARGET_H

    #ifdef __cplusplus
    extern "C" {
    #endif


    #ifndef IN_TARGET 
    
/************************************************************************************************************************
** Function name	: Reset
** Descriptions	: resets the target board.
** input parameters	: None
**
** Returned value	: None
**         
** Used global variables: None
** Calling modules	: None
**
** Created by	: Chenmingji
** Created Date	: 2004/02/02
**-------------------------------------------------------------------------------------------------------
** Modified by	:
** Modified date	:
**-------------------------------------------------------------------------------------------------------
**************************************************************************************************************************/
extern void Reset(void);

/************************************************************************************************************************
** Function name	: TargetInit
**
** Descriptions	: Initialize the target board; it is called in a necessary place, change it as needed
**							
** input parameters	:  None
** Returned value	:  None
**         
** Used global variables: None
** Calling modules	: None
**
** Created by	: Chenmingji
** Created Date	: 2004/02/02
**-------------------------------------------------------------------------------------------------------
** Modified by	: Chenxibing
** Modified date	: 2004-12-09
** Notice		: Add IntDisable() and IntEnable() Functions 
**------------------------------------------------------------------------------------------------------
**************************************************************************************************************************/
extern void TargetInit(void);

    #endif

    #ifdef __cplusplus
    }
    #endif
 
#endif


#define IRQDisable() asm volatile ("swi 0")
#define IRQEnable()  asm volatile ("swi 1")
#define FIQDisable() asm volatile ("swi 2")
#define FIQEnable()  asm volatile ("swi 3")


/************************************************************************************************************************
 *
 * MACRO Name: ISR_ENTRY()
 *
 * Description:
 *    This MACRO is used upon entry to an ISR.  The current version of
 *    the gcc compiler for ARM does not produce correct code for
 *    interrupt routines to operate properly with THUMB code.  The MACRO
 *    performs the following steps:
 *
 *    1 - Adjust address at which execution should resume after servicing
 *        ISR to compensate for IRQ entry
 *    2 - Save the non-banked registers r0-r12 and lr onto the IRQ stack.
 *    3 - Get the status of the interrupted program is in SPSR.
 *    4 - Push it onto the IRQ stack as well.
 *
**************************************************************************************************************************/
#define ISR_ENTRY() asm volatile(" sub   lr, lr,#4\n" \
                                 " stmfd sp!,{r0-r12,lr}\n" \
                                 " mrs   r1, spsr\n" \
                                 " stmfd sp!,{r1}")

/************************************************************************************************************************
 *
 * MACRO Name: ISR_EXIT()
 *
 * Description:
 *    This MACRO is used to exit an ISR.  The current version of the gcc
 *    compiler for ARM does not produce correct code for interrupt
 *    routines to operate properly with THUMB code.  The MACRO performs
 *    the following steps:
 *
 *    1 - Recover SPSR value from stack       
 *    2 - and restore  its value                   
 *    3 - Pop the return address & the saved general registers from
 *        the IRQ stack & return
 *
**************************************************************************************************************************/
#define ISR_EXIT()  asm volatile(" ldmfd sp!,{r1}\n" \
                                 " msr   spsr_c,r1\n" \
                                 " ldmfd sp!,{r0-r12,pc}^")
/************************************************************************************************************************
**                            End Of File
**************************************************************************************************************************/