1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/*
FreeRTOS V8.1.1 - Copyright (C) 2014 Real Time Engineers Ltd.
All rights reserved
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
***************************************************************************
* *
* FreeRTOS provides completely free yet professionally developed, *
* robust, strictly quality controlled, supported, and cross *
* platform software that has become a de facto standard. *
* *
* Help yourself get started quickly and support the FreeRTOS *
* project by purchasing a FreeRTOS tutorial book, reference *
* manual, or both from: http://www.FreeRTOS.org/Documentation *
* *
* Thank you! *
* *
***************************************************************************
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
>>! NOTE: The modification to the GPL is included to allow you to !<<
>>! distribute a combined work that includes FreeRTOS without being !<<
>>! obliged to provide the source code for proprietary components !<<
>>! outside of the FreeRTOS kernel. !<<
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. Full license text is available from the following
link: http://www.freertos.org/a00114.html
1 tab == 4 spaces!
***************************************************************************
* *
* Having a problem? Start by reading the FAQ "My application does *
* not run, what could be wrong?" *
* *
* http://www.FreeRTOS.org/FAQHelp.html *
* *
***************************************************************************
http://www.FreeRTOS.org - Documentation, books, training, latest versions,
license and Real Time Engineers Ltd. contact details.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
compatible FAT file system, and our tiny thread aware UDP/IP stack.
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
licenses offer ticketed support, indemnification and middleware.
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
mission critical applications that require provable dependability.
1 tab == 4 spaces!
*/
/*
Changes from V3.0.0
+ ISRcode pulled inline to reduce stack-usage.
+ Added functionality to only call vTaskSwitchContext() once
when handling multiple interruptsources in a single interruptcall.
+ Filename changed to a .c extension to allow stepping through code
using F7.
Changes from V3.0.1
*/
#ifndef _FREERTOS_SERIAL_ISRSERIALRX_C
#define _FREERTOS_SERIAL_ISRSERIALRX_C
#define serCONTINUOUS_RX ( 1 )
#define serCLEAR_OVERRUN ( 0 )
{
/*
* Was the interrupt a byte being received?
*/
if( bRCIF && bRCIE)
{
/*
* Queue to interface between comms API and interrupt routine.
*/
extern QueueHandle_t xRxedChars;
/*
* Because we are not allowed to use local variables here,
* PRODL is (ab)used as temporary storage. This is allowed
* because this SFR will be restored before exiting the ISR.
*/
extern char cChar;
extern portBASE_TYPE xHigherPriorityTaskWoken;
#pragma locate cChar &PRODL
/*
* If there was a framing error, just get and ignore
* the character
*/
if( bFERR )
{
cChar = RCREG;
}
else
{
/*
* Get the character and post it on the queue of Rxed
* characters. If the post causes a task to wake ask
* for a context switch as the woken task may have a
* higher priority than the task we have interrupted.
*/
cChar = RCREG;
/*
* Clear any overrun errors.
*/
if( bOERR )
{
bCREN = serCLEAR_OVERRUN;
bCREN = serCONTINUOUS_RX;
}
xHigherPriorityTaskWoken = pdFALSE;
xQueueSendFromISR( xRxedChars, ( const void * ) &cChar, &xHigherPriorityTaskWoken );
if( xHigherPriorityTaskWoken )
{
uxSwitchRequested = pdTRUE;
}
}
}
}
#endif /* _FREERTOS_SERIAL_ISRSERIALRX_C */
|
