diff options
| author | richardbarry <richardbarry@1d2547de-c912-0410-9cb9-b8ca96c0e9e2> | 2012-08-11 21:34:11 +0000 |
|---|---|---|
| committer | richardbarry <richardbarry@1d2547de-c912-0410-9cb9-b8ca96c0e9e2> | 2012-08-11 21:34:11 +0000 |
| commit | f279ebee719fa6bda3f91061819e6b42051c7395 (patch) | |
| tree | c2ef3f908508343c26551949d5f947009cda3291 /FreeRTOS/Demo/PIC18_WizC/serial/isrSerialTx.c | |
| parent | 24ce9d9c87e6b7b23f0915e1a91fb4a5bd2f7c3d (diff) | |
| download | freertos-f279ebee719fa6bda3f91061819e6b42051c7395.tar.gz | |
Add FreeRTOS-Plus directory.
git-svn-id: http://svn.code.sf.net/p/freertos/code/trunk@1765 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
Diffstat (limited to 'FreeRTOS/Demo/PIC18_WizC/serial/isrSerialTx.c')
| -rw-r--r-- | FreeRTOS/Demo/PIC18_WizC/serial/isrSerialTx.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/FreeRTOS/Demo/PIC18_WizC/serial/isrSerialTx.c b/FreeRTOS/Demo/PIC18_WizC/serial/isrSerialTx.c new file mode 100644 index 000000000..64bd4e79f --- /dev/null +++ b/FreeRTOS/Demo/PIC18_WizC/serial/isrSerialTx.c @@ -0,0 +1,133 @@ +/*
+ FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
+
+
+ ***************************************************************************
+ * *
+ * FreeRTOS tutorial books are available in pdf and paperback. *
+ * Complete, revised, and edited pdf reference manuals are also *
+ * available. *
+ * *
+ * Purchasing FreeRTOS documentation will not only help you, by *
+ * ensuring you get running as quickly as possible and with an *
+ * in-depth knowledge of how to use FreeRTOS, it will also help *
+ * the FreeRTOS project to continue with its mission of providing *
+ * professional grade, cross platform, de facto standard solutions *
+ * for microcontrollers - completely free of charge! *
+ * *
+ * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
+ * *
+ * Thank you for using FreeRTOS, and thank you for your support! *
+ * *
+ ***************************************************************************
+
+
+ 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. See the GNU General Public License for
+ more details. You should have received a copy of the GNU General Public
+ License and the FreeRTOS license exception along with FreeRTOS; if not it
+ can be viewed here: http://www.freertos.org/a00114.html and also obtained
+ by writing to Richard Barry, contact details for whom are available on the
+ FreeRTOS WEB site.
+
+ 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, training, latest information,
+ license and contact details.
+
+ http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+ including FreeRTOS+Trace - an indispensable productivity tool.
+
+ Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
+ the code with commercial support, indemnification, and middleware, under
+ the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
+ provide a safety engineered and independently SIL3 certified version under
+ the SafeRTOS brand: http://www.SafeRTOS.com.
+*/
+
+/*
+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_ISRSERIALTX_C
+#define _FREERTOS_SERIAL_ISRSERIALTX_C
+
+#define serINTERRUPT_DISABLED ( 0 )
+
+
+{
+ /*
+ * Was the interrupt the Tx register becoming empty?
+ */
+ if( bTXIF && bTXIE)
+ {
+ /*
+ * Queue to interface between comms API and interrupt routine.
+ */
+ extern xQueueHandle xCharsForTx;
+
+ /*
+ * Because we are not allowed to use local variables here,
+ * PRODL and PRODH are (ab)used as temporary storage. This
+ * is allowed because these SFR's will be restored before
+ * exiting the ISR.
+ */
+ extern char cChar;
+ #pragma locate cChar &PRODL
+ extern portBASE_TYPE pxTaskWoken;
+ #pragma locate pxTaskWoken &PRODH
+
+ if( xQueueReceiveFromISR( xCharsForTx, &cChar, &pxTaskWoken ) == pdTRUE )
+ {
+ /*
+ * Send the next character queued for Tx.
+ */
+ TXREG = cChar;
+ }
+ else
+ {
+ /*
+ * Queue empty, nothing to send.
+ */
+ bTXIE = serINTERRUPT_DISABLED;
+ }
+
+ /*
+ * If we woke another task, ask for a contextswitch
+ */
+ if( pxTaskWoken == pdTRUE )
+ {
+ uxSwitchRequested = pdTRUE;
+ }
+ }
+}
+
+#endif /* _FREERTOS_SERIAL_ISRSERIALTX_C */
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