📄 tmt.s
字号:
;/*************************************************************************/
;/* */
;/* Copyright (c) 1994 - 2002 Accelerated Technology, Inc. */
;/* */
;/* PROPRIETARY RIGHTS of Accelerated Technology are involved in the */
;/* subject matter of this material. All manufacturing, reproduction, */
;/* use, and sales rights pertaining to this subject matter are governed */
;/* by the license agreement. The recipient of this software implicitly */
;/* accepts the terms of the license. */
;/* */
;/*************************************************************************/
;
;/*************************************************************************/
;/* */
;/* FILE NAME VERSION */
;/* */
;/* tmt.s Nucleus PLUS\Integrator\ADS 1.13.4 */
;/* */
;/* COMPONENT */
;/* */
;/* TM - Timer Management */
;/* */
;/* DESCRIPTION */
;/* */
;/* This file contains the target dependent routines of the timer */
;/* management component. */
;/* */
;/* DATA STRUCTURES */
;/* */
;/* None */
;/* */
;/* FUNCTIONS */
;/* */
;/* TMT_Set_Clock Set system clock */
;/* TMT_Retrieve_Clock Retrieve system clock */
;/* TMT_Read_Timer Read count-down timer */
;/* TMT_Enable_Timer Enable count-down timer */
;/* TMT_Adjust_Timer Adjust count-down timer */
;/* TMT_Disable_Timer Disable count-down timer */
;/* TMT_Retrieve_TS_Task Retrieve time-sliced task ptr*/
;/* TMT_Timer_Interrupt Process timer interrupt */
;/* */
;/* DEPENDENCIES */
;/* */
;/* tc_extr.h Thread Control functions */
;/* tm_extr.h Timer functions */
;/* */
;/* HISTORY */
;/* */
;/* NAME DATE REMARKS */
;/* */
;/* D. Driscoll 07-02-2001 Released version 1.13.2 */
;/* Fixed SPR 843 */
;/* D. Driscoll 01-04-2002 Released version 1.13.3 */
;/* J. Pregeant 03-27-2002 Released version 1.13.4 */
;/*************************************************************************/
;#define NU_SOURCE_FILE
;
;
;#include "tc_extr.h" /* Thread control functions */
;#include "tm_extr.h" /* Timer functions */
;
;
;/* Define constants used in low-level initialization. */
INCLUDE int_defs.s
;/* End of low-level initialization constants. */
;/* Build as an ARM module */
CODE32
;
AREA |C$$code|, CODE, READONLY
|x$codeseg|
;
;/* Define external inner-component global data references. */
;
;extern VOID *TCD_Current_Thread;
;extern UNSIGNED TMD_System_Clock;
;extern UNSIGNED TMD_Timer;
;extern INT TMD_Timer_State;
;extern UNSIGNED TMD_Time_Slice;
;extern TC_TCB *TMD_Time_Slice_Task;
;extern INT TMD_Time_Slice_State;
;extern TC_HCB TMD_HISR;
;
IMPORT TCD_Current_Thread
IMPORT TMD_System_Clock
IMPORT TMD_Timer
IMPORT TMD_Timer_State
IMPORT TMD_Time_Slice
IMPORT TMD_Time_Slice_Task
IMPORT TMD_Time_Slice_State
IMPORT TMD_HISR
IMPORT TCD_Interrupt_Level
IMPORT TCD_Interrupt_Count
;
;
;/* Define activate HISR function. */
;STATUS TCT_Activate_HISR(TC_HCB *hisr);
;
IMPORT TCT_Activate_HISR
;
;
;/* Define various data structure pointers so their addresses can be obtained
; in a PC-relative manner. */
;
System_Clock
DCD TMD_System_Clock
;
Timer
DCD TMD_Timer
;
Timer_State
DCD TMD_Timer_State
;
Slice_State
DCD TMD_Time_Slice_State
;
Time_Slice
DCD TMD_Time_Slice
;
Current_Thread
DCD TCD_Current_Thread
;
Slice_Task
DCD TMD_Time_Slice_Task
;
HISR
DCD TMD_HISR
;
Int_Level
DCD TCD_Interrupt_Level
;Int_Count
; DCD TCD_Interrupt_Count
;
;
;/*************************************************************************/
;/* */
;/* FUNCTION */
;/* */
;/* TMT_Set_Clock */
;/* */
;/* DESCRIPTION */
;/* */
;/* This function sets the system clock to the specified value. */
;/* */
;/* CALLED BY */
;/* */
;/* Application */
;/* */
;/* CALLS */
;/* */
;/* None */
;/* */
;/* INPUTS */
;/* */
;/* new_value New value for the clock */
;/* */
;/* OUTPUTS */
;/* */
;/* None */
;/* */
;/* HISTORY */
;/* */
;/* NAME DATE REMARKS */
;/* */
;/* W. Lamie 02-15-1994 Created initial version 1.0 */
;/* D. Lamie 02-15-1994 Verified version 1.0 */
;/* */
;/*************************************************************************/
;VOID TMT_Set_Clock(UNSIGNED new_value)
;{
EXPORT TMT_Set_Clock
TMT_Set_Clock
;
; /* Set the system clock to the specified value. */
; TMD_System_Clock = new_value;
;
LDR a2,System_Clock ; Build address of system clock
STR a1,[a2,#0] ; Store new system clock value
BX lr ; Return to caller
;}
;
;
;
;/*************************************************************************/
;/* */
;/* FUNCTION */
;/* */
;/* TMT_Retrieve_Clock */
;/* */
;/* DESCRIPTION */
;/* */
;/* This function returns the current value of the system clock. */
;/* */
;/* CALLED BY */
;/* */
;/* Application */
;/* */
;/* CALLS */
;/* */
;/* None */
;/* */
;/* INPUTS */
;/* */
;/* None */
;/* */
;/* OUTPUTS */
;/* */
;/* TMD_System_Clock Value of system clock */
;/* */
;/* HISTORY */
;/* */
;/* NAME DATE REMARKS */
;/* */
;/* W. Lamie 02-15-1994 Created initial version 1.0 */
;/* D. Lamie 02-15-1994 Verified version 1.0 */
;/* */
;/*************************************************************************/
;UNSIGNED TMT_Retrieve_Clock(void)
;{
EXPORT TMT_Retrieve_Clock
TMT_Retrieve_Clock
;
; /* Return the current value of the system clock. */
; return(TMD_System_Clock);
;
LDR a1,System_Clock ; Build address to system clock
LDR a1,[a1,#0] ; Pickup system clock contents
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -