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https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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Richard Barry
parent
bb7dc7c37f
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2632 changed files with 751681 additions and 0 deletions
116
20080212/Demo/PIC18_WizC/serial/isrSerialRx.c
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116
20080212/Demo/PIC18_WizC/serial/isrSerialRx.c
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@ -0,0 +1,116 @@
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/*
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FreeRTOS.org V4.7.1 - Copyright (C) 2003-2008 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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FreeRTOS.org is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 2 of the License, or
|
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(at your option) any later version.
|
||||
|
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FreeRTOS.org is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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GNU General Public License for more details.
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|
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You should have received a copy of the GNU General Public License
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along with FreeRTOS.org; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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|
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A special exception to the GPL can be applied should you wish to distribute
|
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a combined work that includes FreeRTOS.org, without being obliged to provide
|
||||
the source code for any proprietary components. See the licensing section
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of http://www.FreeRTOS.org for full details of how and when the exception
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can be applied.
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***************************************************************************
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Please ensure to read the configuration and relevant port sections of the
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online documentation.
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+++ http://www.FreeRTOS.org +++
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Documentation, latest information, license and contact details.
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+++ http://www.SafeRTOS.com +++
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A version that is certified for use in safety critical systems.
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+++ http://www.OpenRTOS.com +++
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Commercial support, development, porting, licensing and training services.
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***************************************************************************
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*/
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/*
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Changes from V3.0.0
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+ ISRcode pulled inline to reduce stack-usage.
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+ Added functionality to only call vTaskSwitchContext() once
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when handling multiple interruptsources in a single interruptcall.
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+ Filename changed to a .c extension to allow stepping through code
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using F7.
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Changes from V3.0.1
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*/
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#ifndef _FREERTOS_SERIAL_ISRSERIALRX_C
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#define _FREERTOS_SERIAL_ISRSERIALRX_C
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#define serCONTINUOUS_RX ( 1 )
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#define serCLEAR_OVERRUN ( 0 )
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{
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/*
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* Was the interrupt a byte being received?
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*/
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if( bRCIF && bRCIE)
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{
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/*
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* Queue to interface between comms API and interrupt routine.
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*/
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extern xQueueHandle xRxedChars;
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/*
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* Because we are not allowed to use local variables here,
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* PRODL is (ab)used as temporary storage. This is allowed
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* because this SFR will be restored before exiting the ISR.
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*/
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extern portCHAR cChar;
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#pragma locate cChar &PRODL
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/*
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* If there was a framing error, just get and ignore
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* the character
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*/
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if( bFERR )
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{
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cChar = RCREG;
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}
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else
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{
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/*
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* Get the character and post it on the queue of Rxed
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* characters. If the post causes a task to wake ask
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* for a context switch as the woken task may have a
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* higher priority than the task we have interrupted.
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*/
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cChar = RCREG;
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/*
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* Clear any overrun errors.
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*/
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if( bOERR )
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{
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bCREN = serCLEAR_OVERRUN;
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bCREN = serCONTINUOUS_RX;
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}
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if( xQueueSendFromISR( xRxedChars, ( const void * ) &cChar, pdFALSE ) )
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{
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uxSwitchRequested = pdTRUE;
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}
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}
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}
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}
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#endif /* _FREERTOS_SERIAL_ISRSERIALRX_C */
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109
20080212/Demo/PIC18_WizC/serial/isrSerialTx.c
Normal file
109
20080212/Demo/PIC18_WizC/serial/isrSerialTx.c
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@ -0,0 +1,109 @@
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/*
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FreeRTOS.org V4.7.1 - Copyright (C) 2003-2008 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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FreeRTOS.org is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 2 of the License, or
|
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(at your option) any later version.
|
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|
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FreeRTOS.org is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
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|
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You should have received a copy of the GNU General Public License
|
||||
along with FreeRTOS.org; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
A special exception to the GPL can be applied should you wish to distribute
|
||||
a combined work that includes FreeRTOS.org, without being obliged to provide
|
||||
the source code for any proprietary components. See the licensing section
|
||||
of http://www.FreeRTOS.org for full details of how and when the exception
|
||||
can be applied.
|
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|
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***************************************************************************
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Please ensure to read the configuration and relevant port sections of the
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online documentation.
|
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|
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+++ http://www.FreeRTOS.org +++
|
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Documentation, latest information, license and contact details.
|
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|
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+++ http://www.SafeRTOS.com +++
|
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A version that is certified for use in safety critical systems.
|
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|
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+++ http://www.OpenRTOS.com +++
|
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Commercial support, development, porting, licensing and training services.
|
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|
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***************************************************************************
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*/
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/*
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Changes from V3.0.0
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+ ISRcode pulled inline to reduce stack-usage.
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+ Added functionality to only call vTaskSwitchContext() once
|
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when handling multiple interruptsources in a single interruptcall.
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+ Filename changed to a .c extension to allow stepping through code
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using F7.
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Changes from V3.0.1
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*/
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#ifndef _FREERTOS_SERIAL_ISRSERIALTX_C
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#define _FREERTOS_SERIAL_ISRSERIALTX_C
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#define serINTERRUPT_DISABLED ( 0 )
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{
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/*
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* Was the interrupt the Tx register becoming empty?
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*/
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if( bTXIF && bTXIE)
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{
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/*
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* Queue to interface between comms API and interrupt routine.
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*/
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extern xQueueHandle xCharsForTx;
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/*
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* Because we are not allowed to use local variables here,
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* PRODL and PRODH are (ab)used as temporary storage. This
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* is allowed because these SFR's will be restored before
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* exiting the ISR.
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*/
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extern portCHAR cChar;
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#pragma locate cChar &PRODL
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extern portBASE_TYPE pxTaskWoken;
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#pragma locate pxTaskWoken &PRODH
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if( xQueueReceiveFromISR( xCharsForTx, &cChar, &pxTaskWoken ) == pdTRUE )
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{
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/*
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* Send the next character queued for Tx.
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*/
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TXREG = cChar;
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}
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else
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{
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/*
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* Queue empty, nothing to send.
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*/
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bTXIE = serINTERRUPT_DISABLED;
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}
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/*
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* If we woke another task, ask for a contextswitch
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*/
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if( pxTaskWoken == pdTRUE )
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{
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uxSwitchRequested = pdTRUE;
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}
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}
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}
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#endif /* _FREERTOS_SERIAL_ISRSERIALTX_C */
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187
20080212/Demo/PIC18_WizC/serial/serial.c
Normal file
187
20080212/Demo/PIC18_WizC/serial/serial.c
Normal file
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@ -0,0 +1,187 @@
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/*
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FreeRTOS.org V4.7.1 - Copyright (C) 2003-2008 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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|
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FreeRTOS.org is free software; you can redistribute it and/or modify
|
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 2 of the License, or
|
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(at your option) any later version.
|
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|
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FreeRTOS.org is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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GNU General Public License for more details.
|
||||
|
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You should have received a copy of the GNU General Public License
|
||||
along with FreeRTOS.org; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
|
||||
A special exception to the GPL can be applied should you wish to distribute
|
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a combined work that includes FreeRTOS.org, without being obliged to provide
|
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the source code for any proprietary components. See the licensing section
|
||||
of http://www.FreeRTOS.org for full details of how and when the exception
|
||||
can be applied.
|
||||
|
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***************************************************************************
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Please ensure to read the configuration and relevant port sections of the
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online documentation.
|
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|
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+++ http://www.FreeRTOS.org +++
|
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Documentation, latest information, license and contact details.
|
||||
|
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+++ http://www.SafeRTOS.com +++
|
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A version that is certified for use in safety critical systems.
|
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|
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+++ http://www.OpenRTOS.com +++
|
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Commercial support, development, porting, licensing and training services.
|
||||
|
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***************************************************************************
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*/
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/*
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Changes from V3.0.0
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+ ISRcode removed. Is now pulled inline to reduce stack-usage.
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Changes from V3.0.1
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*/
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/* BASIC INTERRUPT DRIVEN SERIAL PORT DRIVER. */
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/* Scheduler header files. */
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#include "FreeRTOS.h"
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#include "task.h"
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#include "queue.h"
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#include "serial.h"
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/* Hardware pin definitions. */
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#define serTX_PIN bTRC6
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#define serRX_PIN bTRC7
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/* Bit/register definitions. */
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#define serINPUT ( 1 )
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#define serOUTPUT ( 0 )
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#define serINTERRUPT_ENABLED ( 1 )
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/* All ISR's use the PIC18 low priority interrupt. */
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#define serLOW_PRIORITY ( 0 )
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/*-----------------------------------------------------------*/
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/* Queues to interface between comms API and interrupt routines. */
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xQueueHandle xRxedChars;
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xQueueHandle xCharsForTx;
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/*-----------------------------------------------------------*/
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xComPortHandle xSerialPortInitMinimal( unsigned portLONG ulWantedBaud, unsigned portCHAR ucQueueLength )
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{
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unsigned portSHORT usSPBRG;
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/* Create the queues used by the ISR's to interface to tasks. */
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xRxedChars = xQueueCreate( ucQueueLength, ( unsigned portBASE_TYPE ) sizeof( portCHAR ) );
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xCharsForTx = xQueueCreate( ucQueueLength, ( unsigned portBASE_TYPE ) sizeof( portCHAR ) );
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portENTER_CRITICAL();
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/* Setup the IO pins to enable the USART IO. */
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serTX_PIN = serINPUT; // YES really! See datasheet
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serRX_PIN = serINPUT;
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/* Set the TX config register. */
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TXSTA = 0b00100000;
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// ||||||||--bit0: TX9D = n/a
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// |||||||---bit1: TRMT = ReadOnly
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// ||||||----bit2: BRGH = High speed
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// |||||-----bit3: SENDB = n/a
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// ||||------bit4: SYNC = Asynchronous mode
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// |||-------bit5: TXEN = Transmit enable
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// ||--------bit6: TX9 = 8-bit transmission
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// |---------bit7: CSRC = n/a
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/* Set the Receive config register. */
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RCSTA = 0b10010000;
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// ||||||||--bit0: RX9D = ReadOnly
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// |||||||---bit1: OERR = ReadOnly
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// ||||||----bit2: FERR = ReadOnly
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// |||||-----bit3: ADDEN = n/a
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// ||||------bit4: CREN = Enable receiver
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// |||-------bit5: SREN = n/a
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// ||--------bit6: RX9 = 8-bit reception
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// |---------bit7: SPEN = Serial port enabled
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/* Calculate the baud rate generator value.
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We use low-speed (BRGH=0), the formula is
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SPBRG = ( ( FOSC / Desired Baud Rate ) / 64 ) - 1 */
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usSPBRG = ( ( APROCFREQ / ulWantedBaud ) / 64 ) - 1;
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if( usSPBRG > 255 )
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{
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SPBRG = 255;
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}
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else
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{
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SPBRG = usSPBRG;
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}
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/* Set the serial interrupts to use the same priority as the tick. */
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bTXIP = serLOW_PRIORITY;
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bRCIP = serLOW_PRIORITY;
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/* Enable the Rx interrupt now, the Tx interrupt will get enabled when
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we have data to send. */
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bRCIE = serINTERRUPT_ENABLED;
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portEXIT_CRITICAL();
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/* Unlike other ports, this serial code does not allow for more than one
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com port. We therefore don't return a pointer to a port structure and
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can instead just return NULL. */
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return NULL;
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}
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/*-----------------------------------------------------------*/
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xComPortHandle xSerialPortInit( eCOMPort ePort, eBaud eWantedBaud, eParity eWantedParity, eDataBits eWantedDataBits, eStopBits eWantedStopBits, unsigned portCHAR ucBufferLength )
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{
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/* This is not implemented in this port.
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Use xSerialPortInitMinimal() instead. */
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return NULL;
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}
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/*-----------------------------------------------------------*/
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portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, portCHAR *pcRxedChar, portTickType xBlockTime )
|
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{
|
||||
/* Get the next character from the buffer. Return false if no characters
|
||||
are available, or arrive before xBlockTime expires. */
|
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if( xQueueReceive( xRxedChars, pcRxedChar, xBlockTime ) )
|
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{
|
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return ( portCHAR ) pdTRUE;
|
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}
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return ( portCHAR ) pdFALSE;
|
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}
|
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/*-----------------------------------------------------------*/
|
||||
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portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, portCHAR cOutChar, portTickType xBlockTime )
|
||||
{
|
||||
/* Return false if after the block time there is no room on the Tx queue. */
|
||||
if( xQueueSend( xCharsForTx, ( const void * ) &cOutChar, xBlockTime ) != ( portCHAR ) pdPASS )
|
||||
{
|
||||
return pdFAIL;
|
||||
}
|
||||
|
||||
/* Turn interrupt on - ensure the compiler only generates a single
|
||||
instruction for this. */
|
||||
bTXIE = serINTERRUPT_ENABLED;
|
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|
||||
return pdPASS;
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
void vSerialClose( xComPortHandle xPort )
|
||||
{
|
||||
/* Not implemented for this port.
|
||||
To implement, turn off the interrupts and delete the memory
|
||||
allocated to the queues. */
|
||||
}
|
||||
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