OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM7_LPC2129_Keil_RVDS/] [serial/] [serialISR.s] - Blame information for rev 615

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 577 jeremybenn
;/*
2
;    FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
3
;
4
;    ***************************************************************************
5
;    *                                                                         *
6
;    * If you are:                                                             *
7
;    *                                                                         *
8
;    *    + New to FreeRTOS,                                                   *
9
;    *    + Wanting to learn FreeRTOS or multitasking in general quickly       *
10
;    *    + Looking for basic training,                                        *
11
;    *    + Wanting to improve your FreeRTOS skills and productivity           *
12
;    *                                                                         *
13
;    * then take a look at the FreeRTOS books - available as PDF or paperback  *
14
;    *                                                                         *
15
;    *        "Using the FreeRTOS Real Time Kernel - a Practical Guide"        *
16
;    *                  http://www.FreeRTOS.org/Documentation                  *
17
;    *                                                                         *
18
;    * A pdf reference manual is also available.  Both are usually delivered   *
19
;    * to your inbox within 20 minutes to two hours when purchased between 8am *
20
;    * and 8pm GMT (although please allow up to 24 hours in case of            *
21
;    * exceptional circumstances).  Thank you for your support!                *
22
;    *                                                                         *
23
;    ***************************************************************************
24
;
25
;    This file is part of the FreeRTOS distribution.
26
;
27
;    FreeRTOS is free software; you can redistribute it and/or modify it under
28
;    the terms of the GNU General Public License (version 2) as published by the
29
;    Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
30
;    ***NOTE*** The exception to the GPL is included to allow you to distribute
31
;    a combined work that includes FreeRTOS without being obliged to provide the
32
;    source code for proprietary components outside of the FreeRTOS kernel.
33
;    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
34
;    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
35
;    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
36
;    more details. You should have received a copy of the GNU General Public 
37
;    License and the FreeRTOS license exception along with FreeRTOS; if not it 
38
;    can be viewed here: http://www.freertos.org/a00114.html and also obtained 
39
;    by writing to Richard Barry, contact details for whom are available on the
40
;    FreeRTOS WEB site.
41
;
42
;    1 tab == 4 spaces!
43
;
44
;    http://www.FreeRTOS.org - Documentation, latest information, license and
45
;    contact details.
46
;
47
;    http://www.SafeRTOS.com - A version that is certified for use in safety
48
;    critical systems.
49
;
50
;    http://www.OpenRTOS.com - Commercial support, development, porting,
51
;    licensing and training services.
52
;*/
53
 
54
        INCLUDE portmacro.inc
55
 
56
        ;The UART interrupt entry point is defined within an assembly wrapper
57
        ;within this file.  This takes care of the task context saving before it
58
        ;calls the main handler (vUART_ISRHandler()) which is written in C within
59
        ;serial.c.  The execution of the handler can unblock tasks that were blocked
60
        ;waiting for UART events.  Once the handler completes the asm wrapper 
61
        ;finishes off by        restoring the context of whichever task is now selected to 
62
        ;enter the RUNNING state (which might now be a different task to that which
63
        ;was originally interrupted.
64
        IMPORT vUART_ISRHandler
65
        EXPORT vUART_ISREntry
66
 
67
        ;/* Interrupt entry must always be in ARM mode. */
68
        ARM
69
        AREA    |.text|, CODE, READONLY
70
 
71
 
72
vUART_ISREntry
73
 
74
        PRESERVE8
75
 
76
        ; Save the context of the interrupted task.
77
        portSAVE_CONTEXT
78
 
79
        ; Call the C handler function - defined within serial.c.
80
        LDR R0, =vUART_ISRHandler
81
        MOV LR, PC
82
        BX R0
83
 
84
        ; Finish off by restoring the context of the task that has been chosen to 
85
        ; run next - which might be a different task to that which was originally
86
        ; interrupted.
87
        portRESTORE_CONTEXT
88
 
89
        END

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.