len0rd/FreeRTOS-Kernel
1
0
Fork 0
mirror of https://github.com/FreeRTOS/FreeRTOS-Kernel.git synced 2025-08-19 17:48:33 -04:00
Code Issues Projects Releases Packages Wiki Activity

Add FreeRTOS-Plus directory.

Browse source
This commit is contained in:
Richard Barry 2012-08-11 21:34:11 +00:00
parent 7bd5f21ad5
commit f508a5f653
6798 changed files with 134949 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

326
FreeRTOS/Demo/CORTEX_LM3S316_IAR/commstest.c Normal file
View file

@ -0,0 +1,326 @@
/*
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.
*/
/*
* The comms test Rx and Tx task and co-routine. See the comments at the top
* of main.c for full information.
*/
/* Scheduler include files. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "croutine.h"
/* Demo application include files. */
#include "partest.h"
/* Library include files. */
#include "DriverLib.h"
/* The LED's toggled by the various tasks. */
#define commsFAIL_LED ( 7 )
#define commsRX_LED ( 6 )
#define commsTX_LED ( 5 )
/* The length of the queue used to pass received characters to the Comms Rx
task. */
#define commsRX_QUEUE_LEN ( 5 )
/* The baud rate used by the UART comms tasks/co-routine. */
#define commsBAUD_RATE ( 57600 )
/* FIFO setting for the UART. The FIFO is not used to create a better test. */
#define commsFIFO_SET ( 0x10 )
/* The string that is transmitted on the UART contains sequentially the
characters from commsFIRST_TX_CHAR to commsLAST_TX_CHAR. */
#define commsFIRST_TX_CHAR '0'
#define commsLAST_TX_CHAR 'z'
/* Just used to walk through the program memory in order that some random data
can be generated. */
#define commsTOTAL_PROGRAM_MEMORY ( ( unsigned long * ) ( 8 * 1024 ) )
#define commsFIRST_PROGRAM_BYTES ( ( unsigned long * ) 4 )
/* The time between transmissions of the string on UART 0. This is pseudo
random in order to generate a bit or randomness to when the interrupts occur.*/
#define commsMIN_TX_DELAY ( 40 / portTICK_RATE_MS )
#define commsMAX_TX_DELAY ( ( portTickType ) 0x7f )
#define commsOFFSET_TIME ( ( portTickType ) 3 )
/* The time the Comms Rx task should wait to receive a character. This should
be slightly longer than the time between transmissions. If we do not receive
a character after this time then there must be an error in the transmission or
the timing of the transmission. */
#define commsRX_DELAY ( commsMAX_TX_DELAY + 20 )
static unsigned portBASE_TYPE uxCommsErrorStatus = pdPASS;
/* The queue used to pass characters out of the ISR. */
static xQueueHandle xCommsQueue;
/* The next character to transmit. */
static char cNextChar;
/*-----------------------------------------------------------*/
void vSerialInit( void )
{
/* Create the queue used to communicate between the UART ISR and the Comms
Rx task. */
xCommsQueue = xQueueCreate( commsRX_QUEUE_LEN, sizeof( char ) );
/* Enable the UART. GPIOA has already been initialised. */
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
/* Set GPIO A0 and A1 as peripheral function. They are used to output the
UART signals. */
GPIODirModeSet( GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1, GPIO_DIR_MODE_HW );
/* Configure the UART for 8-N-1 operation. */
UARTConfigSetExpClk( UART0_BASE, SysCtlClockGet(), commsBAUD_RATE, UART_CONFIG_WLEN_8 | UART_CONFIG_PAR_NONE | UART_CONFIG_STOP_ONE );
/* We dont want to use the fifo. This is for test purposes to generate
as many interrupts as possible. */
HWREG( UART0_BASE + UART_O_LCR_H ) &= ~commsFIFO_SET;
/* Enable both Rx and Tx interrupts. */
HWREG( UART0_BASE + UART_O_IM ) |= ( UART_INT_TX | UART_INT_RX );
IntPrioritySet( INT_UART0, configKERNEL_INTERRUPT_PRIORITY );
IntEnable( INT_UART0 );
}
/*-----------------------------------------------------------*/
void vSerialTxCoRoutine( xCoRoutineHandle xHandle, unsigned portBASE_TYPE uxIndex )
{
portTickType xDelayPeriod;
static unsigned long *pulRandomBytes = commsFIRST_PROGRAM_BYTES;
/* Co-routine MUST start with a call to crSTART. */
crSTART( xHandle );
for(;;)
{
/* Was the previously transmitted string received correctly? */
if( uxCommsErrorStatus != pdPASS )
{
/* An error was encountered so set the error LED. */
vParTestSetLED( commsFAIL_LED, pdTRUE );
}
/* The next character to Tx is the first in the string. */
cNextChar = commsFIRST_TX_CHAR;
UARTIntDisable( UART0_BASE, UART_INT_TX );
{
/* Send the first character. */
if( !( HWREG( UART0_BASE + UART_O_FR ) & UART_FR_TXFF ) )
{
HWREG( UART0_BASE + UART_O_DR ) = cNextChar;
}
/* Move the variable to the char to Tx on so the ISR transmits
the next character in the string once this one has completed. */
cNextChar++;
}
UARTIntEnable(UART0_BASE, UART_INT_TX);
/* Toggle the LED to show a new string is being transmitted. */
vParTestToggleLED( commsTX_LED );
/* Delay before we start the string off again. A pseudo-random delay
is used as this will provide a better test. */
xDelayPeriod = xTaskGetTickCount() + ( *pulRandomBytes );
pulRandomBytes++;
if( pulRandomBytes > commsTOTAL_PROGRAM_MEMORY )
{
pulRandomBytes = commsFIRST_PROGRAM_BYTES;
}
/* Make sure we don't wait too long... */
xDelayPeriod &= commsMAX_TX_DELAY;
/* ...but we do want to wait. */
if( xDelayPeriod < commsMIN_TX_DELAY )
{
xDelayPeriod = commsMIN_TX_DELAY;
}
/* Block for the random(ish) time. */
crDELAY( xHandle, xDelayPeriod );
}
/* Co-routine MUST end with a call to crEND. */
crEND();
}
/*-----------------------------------------------------------*/
void vUART_ISR( void )
{
unsigned long ulStatus;
char cRxedChar;
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
/* What caused the interrupt. */
ulStatus = UARTIntStatus( UART0_BASE, pdTRUE );
/* Clear the interrupt. */
UARTIntClear( UART0_BASE, ulStatus );
/* Was an Rx interrpt pending? */
if( ulStatus & UART_INT_RX )
{
if( ( HWREG(UART0_BASE + UART_O_FR ) & UART_FR_RXFF ) )
{
/* Get the char from the buffer and post it onto the queue of
Rxed chars. Posting the character should wake the task that is
blocked on the queue waiting for characters. */
cRxedChar = ( char ) HWREG( UART0_BASE + UART_O_DR );
xQueueSendFromISR( xCommsQueue, &cRxedChar, &xHigherPriorityTaskWoken );
}
}
/* Was a Tx interrupt pending? */
if( ulStatus & UART_INT_TX )
{
/* Send the next character in the string. We are not using the FIFO. */
if( cNextChar <= commsLAST_TX_CHAR )
{
if( !( HWREG( UART0_BASE + UART_O_FR ) & UART_FR_TXFF ) )
{
HWREG( UART0_BASE + UART_O_DR ) = cNextChar;
}
cNextChar++;
}
}
/* If a task was woken by the character being received then we force
a context switch to occur in case the task is of higher priority than
the currently executing task (i.e. the task that this interrupt
interrupted.) */
portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
}
/*-----------------------------------------------------------*/
void vCommsRxTask( void * pvParameters )
{
static char cRxedChar, cExpectedChar;
/* Set the char we expect to receive to the start of the string. */
cExpectedChar = commsFIRST_TX_CHAR;
for( ;; )
{
/* Wait for a character to be received. */
xQueueReceive( xCommsQueue, ( void * ) &cRxedChar, commsRX_DELAY );
/* Was the character recived (if any) the expected character. */
if( cRxedChar != cExpectedChar )
{
/* Got an unexpected character. This can sometimes occur when
reseting the system using the debugger leaving characters already
in the UART regsters. */
uxCommsErrorStatus = pdFAIL;
/* Resync by waiting for the end of the current string. */
while( cRxedChar != commsLAST_TX_CHAR )
{
while( !xQueueReceive( xCommsQueue, ( void * ) &cRxedChar, portMAX_DELAY ) );
}
/* The next expected character is the start of the string again. */
cExpectedChar = commsFIRST_TX_CHAR;
}
else
{
if( cExpectedChar == commsLAST_TX_CHAR )
{
/* We have reached the end of the string - we now expect to
receive the first character in the string again. The LED is
toggled to indicate that the entire string was received without
error. */
vParTestToggleLED( commsRX_LED );
cExpectedChar = commsFIRST_TX_CHAR;
}
else
{
/* We got the expected character, we now expect to receive the
next character in the string. */
cExpectedChar++;
}
}
}
}
/*-----------------------------------------------------------*/
unsigned portBASE_TYPE uxGetCommsStatus( void )
{
return uxCommsErrorStatus;
}