2 ; FreeRTOS.org V5.1.1 - Copyright (C) 2003-2008 Richard Barry.
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4 ; This file is part of the FreeRTOS.org distribution.
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6 ; FreeRTOS.org is free software; you can redistribute it and/or modify
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7 ; it under the terms of the GNU General Public License as published by
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8 ; the Free Software Foundation; either version 2 of the License, or
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9 ; (at your option) any later version.
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11 ; FreeRTOS.org is distributed in the hope that it will be useful,
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12 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 ; GNU General Public License for more details.
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16 ; You should have received a copy of the GNU General Public License
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17 ; along with FreeRTOS.org; if not, write to the Free Software
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18 ; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 ; A special exception to the GPL can be applied should you wish to distribute
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21 ; a combined work that includes FreeRTOS.org, without being obliged to provide
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22 ; the source code for any proprietary components. See the licensing section
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23 ; of http://www.FreeRTOS.org for full details of how and when the exception
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26 ; ***************************************************************************
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27 ; ***************************************************************************
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29 ; * SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, *
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30 ; * and even write all or part of your application on your behalf. *
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31 ; * See http://www.OpenRTOS.com for details of the services we provide to *
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32 ; * expedite your project. *
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34 ; ***************************************************************************
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35 ; ***************************************************************************
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37 ; Please ensure to read the configuration and relevant port sections of the
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38 ; online documentation.
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40 ; http://www.FreeRTOS.org - Documentation, latest information, license and
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43 ; http://www.SafeRTOS.com - A version that is certified for use in safety
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46 ; http://www.OpenRTOS.com - Commercial support, development, porting,
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47 ; licensing and training services.
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50 INCLUDE portmacro.inc
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52 ;The UART interrupt entry point is defined within an assembly wrapper
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53 ;within this file. This takes care of the task context saving before it
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54 ;calls the main handler (vUART_ISRHandler()) which is written in C within
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55 ;serial.c. The execution of the handler can unblock tasks that were blocked
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56 ;waiting for UART events. Once the handler completes the asm wrapper
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57 ;finishes off by restoring the context of whichever task is now selected to
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58 ;enter the RUNNING state (which might now be a different task to that which
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59 ;was originally interrupted.
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60 IMPORT vUART_ISRHandler
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61 EXPORT vUART_ISREntry
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63 ;/* Interrupt entry must always be in ARM mode. */
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65 AREA |.text|, CODE, READONLY
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72 ; Save the context of the interrupted task.
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75 ; Call the C handler function - defined within serial.c.
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76 LDR R0, =vUART_ISRHandler
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80 ; Finish off by restoring the context of the task that has been chosen to
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81 ; run next - which might be a different task to that which was originally
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