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Add FreeRTOS-Plus directory.

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Richard Barry 2012-08-11 21:34:11 +00:00
parent 7bd5f21ad5
commit f508a5f653
6798 changed files with 134949 additions and 19 deletions
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223
FreeRTOS/Demo/PIC32MX_MPLAB/serial/serial.c Normal file
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/*
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.
*/
/* BASIC INTERRUPT DRIVEN SERIAL PORT DRIVER.
NOTE: This driver is primarily to test the scheduler functionality. It does
not effectively use the buffers or DMA and is therefore not intended to be
an example of an efficient driver. */
/* Standard include file. */
#include <stdlib.h>
#include <plib.h>
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "queue.h"
#include "task.h"
/* Demo app include files. */
#include "serial.h"
/* Hardware setup. */
#define serSET_FLAG ( 1 )
/* The queues used to communicate between tasks and ISR's. */
static xQueueHandle xRxedChars;
static xQueueHandle xCharsForTx;
/* Flag used to indicate the tx status. */
static portBASE_TYPE xTxHasEnded;
/*-----------------------------------------------------------*/
/* The UART interrupt handler. As this uses the FreeRTOS assembly interrupt
entry point the IPL setting in the following prototype has no effect. The
interrupt priority is set by the call to ConfigIntUART2() in
xSerialPortInitMinimal(). */
void __attribute__( (interrupt(ipl0), vector(_UART2_VECTOR))) vU2InterruptWrapper( void );
/*-----------------------------------------------------------*/
xComPortHandle xSerialPortInitMinimal( unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
{
unsigned short usBRG;
/* Create the queues used by the com test task. */
xRxedChars = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
xCharsForTx = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
/* Configure the UART and interrupts. */
usBRG = (unsigned short)(( (float)configPERIPHERAL_CLOCK_HZ / ( (float)16 * (float)ulWantedBaud ) ) - (float)0.5);
OpenUART2( UART_EN, UART_RX_ENABLE | UART_TX_ENABLE | UART_INT_TX | UART_INT_RX_CHAR, usBRG );
ConfigIntUART2( ( configKERNEL_INTERRUPT_PRIORITY + 1 ) | UART_INT_SUB_PR0 | UART_TX_INT_EN | UART_RX_INT_EN );
xTxHasEnded = pdTRUE;
/* Only a single port is implemented so we don't need to return anything. */
return NULL;
}
/*-----------------------------------------------------------*/
signed portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed char *pcRxedChar, portTickType xBlockTime )
{
/* Only one port is supported. */
( void ) pxPort;
/* Get the next character from the buffer. Return false if no characters
are available or arrive before xBlockTime expires. */
if( xQueueReceive( xRxedChars, pcRxedChar, xBlockTime ) )
{
return pdTRUE;
}
else
{
return pdFALSE;
}
}
/*-----------------------------------------------------------*/
signed portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, signed char cOutChar, portTickType xBlockTime )
{
/* Only one port is supported. */
( void ) pxPort;
/* Return false if after the block time there is no room on the Tx queue. */
if( xQueueSend( xCharsForTx, &cOutChar, xBlockTime ) != pdPASS )
{
return pdFAIL;
}
/* A critical section should not be required as xTxHasEnded will not be
written to by the ISR if it is already 0 (is this correct?). */
if( xTxHasEnded )
{
xTxHasEnded = pdFALSE;
IFS1SET = _IFS1_U2TXIF_MASK;
}
return pdPASS;
}
/*-----------------------------------------------------------*/
void vSerialClose( xComPortHandle xPort )
{
}
/*-----------------------------------------------------------*/
void vU2InterruptHandler( void )
{
/* Declared static to minimise stack use. */
static char cChar;
static portBASE_TYPE xHigherPriorityTaskWoken;
xHigherPriorityTaskWoken = pdFALSE;
/* Are any Rx interrupts pending? */
if( IFS1bits.U2RXIF == 1)
{
while( U2STAbits.URXDA )
{
/* Retrieve the received character and place it in the queue of
received characters. */
cChar = U2RXREG;
xQueueSendFromISR( xRxedChars, &cChar, &xHigherPriorityTaskWoken );
}
IFS1CLR = _IFS1_U2RXIF_MASK;
}
/* Are any Tx interrupts pending? */
if( IFS1bits.U2TXIF == 1 )
{
while( !( U2STAbits.UTXBF ) )
{
if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xHigherPriorityTaskWoken ) == pdTRUE )
{
/* Send the next character queued for Tx. */
U2TXREG = cChar;
}
else
{
/* Queue empty, nothing to send. */
xTxHasEnded = pdTRUE;
break;
}
}
IFS1CLR = _IFS1_U2TXIF_MASK;
}
/* If sending or receiving necessitates a context switch, then switch now. */
portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
}

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FreeRTOS/Demo/PIC32MX_MPLAB/serial/serial_isr.S Normal file
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#include <p32xxxx.h>
#include <sys/asm.h>
#include "ISR_Support.h"
.set nomips16
.set noreorder
.extern vU2InterruptHandler
.extern xISRStackTop
.global vU2InterruptWrapper
.set noreorder
.set noat
.ent vU2InterruptWrapper
vU2InterruptWrapper:
portSAVE_CONTEXT
jal vU2InterruptHandler
nop
portRESTORE_CONTEXT
.end vU2InterruptWrapper