len0rd/FreeRTOS-Kernel
1
0
Fork 0
mirror of https://github.com/FreeRTOS/FreeRTOS-Kernel.git synced 2025-08-19 09:38:32 -04:00
Code Issues Projects Releases Packages Wiki Activity

First version under SVN is V4.0.1

Browse source
This commit is contained in:
Richard Barry 2006-05-02 09:39:15 +00:00
parent 243393860c
commit b6df57c7e3
918 changed files with 269038 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

82
Demo/msp430_GCC/FreeRTOSConfig.h Normal file
View file

@ -0,0 +1,82 @@
/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
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 as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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
along with FreeRTOS; 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, 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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
#ifndef FREERTOS_CONFIG_H
#define FREERTOS_CONFIG_H
#include <msp430x44x.h>
/*-----------------------------------------------------------
* Application specific definitions.
*
* These definitions should be adjusted for your particular hardware and
* application requirements.
*
* THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
* FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
*----------------------------------------------------------*/
#define configUSE_PREEMPTION 1
#define configUSE_IDLE_HOOK 0
#define configUSE_TICK_HOOK 0
#define configCPU_CLOCK_HZ ( ( unsigned portLONG ) 7995392 ) /* Clock setup from main.c in the demo application. */
#define configTICK_RATE_HZ ( ( portTickType ) 1000 )
#define configMAX_PRIORITIES ( ( unsigned portBASE_TYPE ) 4 )
#define configMINIMAL_STACK_SIZE ( ( unsigned portSHORT ) 50 )
#define configTOTAL_HEAP_SIZE ( ( size_t ) ( 1800 ) )
#define configMAX_TASK_NAME_LEN ( 8 )
#define configUSE_TRACE_FACILITY 0
#define configUSE_16_BIT_TICKS 1
#define configIDLE_SHOULD_YIELD 1
/* Co-routine definitions. */
#define configUSE_CO_ROUTINES 0
#define configMAX_CO_ROUTINE_PRIORITIES ( 2 )
/* Set the following definitions to 1 to include the API function, or zero
to exclude the API function. */
#define INCLUDE_vTaskPrioritySet 0
#define INCLUDE_uxTaskPriorityGet 0
#define INCLUDE_vTaskDelete 1
#define INCLUDE_vTaskCleanUpResources 0
#define INCLUDE_vTaskSuspend 0
#define INCLUDE_vTaskDelayUntil 1
#define INCLUDE_vTaskDelay 1
#endif /* FREERTOS_CONFIG_H */

212
Demo/msp430_GCC/ParTest/ParTest.c Normal file
View file

@ -0,0 +1,212 @@
/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
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 as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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
along with FreeRTOS; 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, 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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
/*-----------------------------------------------------------
* Characters on the LCD are used to simulate LED's. In this case the 'ParTest'
* is really operating on the LCD display.
*-----------------------------------------------------------*/
/*
* This demo is configured to execute on the ES449 prototyping board from
* SoftBaugh. The ES449 has a built in LCD display and a single built in user
* LED. Therefore, in place of flashing an LED, the 'flash' and 'check' tasks
* toggle '*' characters on the LCD. The left most '*' represents LED 0, the
* next LED 1, etc.
*
* There is a single genuine on board LED referenced as LED 10.
*/
/* Standard includes. */
#include <signal.h>
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
/* Demo application includes. */
#include "partest.h"
/* Constants required to setup the LCD. */
#define LCD_DIV_64 5
/* Constants required to access the "LED's". The LED segments are turned on
and off to generate '*' characters. */
#define partstNUM_LEDS ( ( unsigned portCHAR ) 6 )
#define partstSEGMENTS_ON ( ( unsigned portCHAR ) 0x0f )
#define partstSEGMENTS_OFF ( ( unsigned portCHAR ) 0x00 )
/* The LED number of the real on board LED, rather than a simulated LED. */
#define partstON_BOARD_LED ( ( unsigned portBASE_TYPE ) 10 )
#define mainON_BOARD_LED_BIT ( ( unsigned portCHAR ) 0x01 )
/* The LCD segments used to generate the '*' characters for LED's 0 to 5. */
unsigned portCHAR * const ucRHSSegments[ partstNUM_LEDS ] = { ( unsigned portCHAR * )0xa4,
( unsigned portCHAR * )0xa2,
( unsigned portCHAR * )0xa0,
( unsigned portCHAR * )0x9e,
( unsigned portCHAR * )0x9c,
( unsigned portCHAR * )0x9a };
unsigned portCHAR * const ucLHSSegments[ partstNUM_LEDS ] = { ( unsigned portCHAR * )0xa3,
( unsigned portCHAR * )0xa1,
( unsigned portCHAR * )0x9f,
( unsigned portCHAR * )0x9d,
( unsigned portCHAR * )0x9b,
( unsigned portCHAR * )0x99 };
/*
* Toggle the single genuine built in LED.
*/
static void prvToggleOnBoardLED( void );
/*-----------------------------------------------------------*/
void vParTestInitialise( void )
{
/* Initialise the LCD hardware. */
/* Used for the onboard LED. */
P1DIR = 0x01;
// Setup Basic Timer for LCD operation
BTCTL = (LCD_DIV_64+0x23);
// Setup port functions
P1SEL = 0x32;
P2SEL = 0x00;
P3SEL = 0x00;
P4SEL = 0xFC;
P5SEL = 0xFF;
/* Initialise all segments to off. */
LCDM1 = partstSEGMENTS_OFF;
LCDM2 = partstSEGMENTS_OFF;
LCDM3 = partstSEGMENTS_OFF;
LCDM4 = partstSEGMENTS_OFF;
LCDM5 = partstSEGMENTS_OFF;
LCDM6 = partstSEGMENTS_OFF;
LCDM7 = partstSEGMENTS_OFF;
LCDM8 = partstSEGMENTS_OFF;
LCDM9 = partstSEGMENTS_OFF;
LCDM10 = partstSEGMENTS_OFF;
LCDM11 = partstSEGMENTS_OFF;
LCDM12 = partstSEGMENTS_OFF;
LCDM13 = partstSEGMENTS_OFF;
LCDM14 = partstSEGMENTS_OFF;
LCDM15 = partstSEGMENTS_OFF;
LCDM16 = partstSEGMENTS_OFF;
LCDM17 = partstSEGMENTS_OFF;
LCDM18 = partstSEGMENTS_OFF;
LCDM19 = partstSEGMENTS_OFF;
LCDM20 = partstSEGMENTS_OFF;
/* Setup LCD control. */
LCDCTL = (LCDSG0_7|LCD4MUX|LCDON);
}
/*-----------------------------------------------------------*/
void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )
{
/* Set or clear the output [in this case show or hide the '*' character. */
if( uxLED < ( portBASE_TYPE ) partstNUM_LEDS )
{
vTaskSuspendAll();
{
if( xValue )
{
/* Turn on the segments required to show the '*'. */
*( ucRHSSegments[ uxLED ] ) = partstSEGMENTS_ON;
*( ucLHSSegments[ uxLED ] ) = partstSEGMENTS_ON;
}
else
{
/* Turn off all the segments. */
*( ucRHSSegments[ uxLED ] ) = partstSEGMENTS_OFF;
*( ucLHSSegments[ uxLED ] ) = partstSEGMENTS_OFF;
}
}
xTaskResumeAll();
}
}
/*-----------------------------------------------------------*/
void vParTestToggleLED( unsigned portBASE_TYPE uxLED )
{
if( uxLED < ( portBASE_TYPE ) partstNUM_LEDS )
{
vTaskSuspendAll();
{
/* If the '*' is already showing - hide it. If it is not already
showing then show it. */
if( *( ucRHSSegments[ uxLED ] ) )
{
*( ucRHSSegments[ uxLED ] ) = partstSEGMENTS_OFF;
*( ucLHSSegments[ uxLED ] ) = partstSEGMENTS_OFF;
}
else
{
*( ucRHSSegments[ uxLED ] ) = partstSEGMENTS_ON;
*( ucLHSSegments[ uxLED ] ) = partstSEGMENTS_ON;
}
}
xTaskResumeAll();
}
else
{
if( uxLED == partstON_BOARD_LED )
{
/* The request related to the genuine on board LED. */
prvToggleOnBoardLED();
}
}
}
/*-----------------------------------------------------------*/
static void prvToggleOnBoardLED( void )
{
static unsigned portSHORT sState = pdFALSE;
/* Toggle the state of the single genuine on board LED. */
if( sState )
{
P1OUT |= mainON_BOARD_LED_BIT;
}
else
{
P1OUT &= ~mainON_BOARD_LED_BIT;
}
sState = !sState;
}
/*-----------------------------------------------------------*/

8
Demo/msp430_GCC/gdb.ini Normal file
View file

@ -0,0 +1,8 @@
target remote localhost:3333
kill
target remote localhost:3333
b main
c

242
Demo/msp430_GCC/main.c Normal file
View file

@ -0,0 +1,242 @@
/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
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 as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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
along with FreeRTOS; 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, 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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
/*
* Creates all the demo application tasks, then starts the scheduler. The WEB
* documentation provides more details of the demo application tasks.
*
* This demo is configured to execute on the ES449 prototyping board from
* SoftBaugh. The ES449 has a built in LCD display and a single built in user
* LED. Therefore, in place of flashing an LED, the 'flash' and 'check' tasks
* toggle '*' characters on the LCD. The left most '*' represents LED 0, the
* next LED 1, etc.
*
* Main. c also creates a task called 'Check'. This only executes every three
* seconds but has the highest priority so is guaranteed to get processor time.
* Its main function is to check that all the other tasks are still operational.
* Each task that does not flash an LED maintains a unique count that is
* incremented each time the task successfully completes its function. Should
* any error occur within such a task the count is permanently halted. The
* 'check' task inspects the count of each task to ensure it has changed since
* the last time the check task executed. If all the count variables have
* changed all the tasks are still executing error free, and the check task
* toggles an LED with a three second period. Should any task contain an error
* at any time the LED toggle rate will increase to 500ms.
*
* Please read the documentation for the MSP430 port available on
* http://www.FreeRTOS.org.
*/
/* Standard includes. */
#include <stdlib.h>
#include <signal.h>
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
/* Demo application includes. */
#include "partest.h"
#include "flash.h"
#include "integer.h"
#include "comtest2.h"
#include "PollQ.h"
/* Constants required for hardware setup. */
#define mainALL_BITS_OUTPUT ( ( unsigned portCHAR ) 0xff )
#define mainMAX_FREQUENCY ( ( unsigned portCHAR ) 121 )
/* Constants that define the LED's used by the various tasks. [in this case
the '*' characters on the LCD represent LED's] */
#define mainCHECK_LED ( 4 )
#define mainCOM_TEST_LED ( 10 )
/* Demo task priorities. */
#define mainCHECK_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )
#define mainCOM_TEST_PRIORITY ( tskIDLE_PRIORITY + 2 )
#define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 2 )
#define mainLED_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
/* Baud rate used by the COM test tasks. */
#define mainCOM_TEST_BAUD_RATE ( ( unsigned portLONG ) 19200 )
/* The frequency at which the 'Check' tasks executes. See the comments at the
top of the page. When the system is operating error free the 'Check' task
toggles an LED every three seconds. If an error is discovered in any task the
rate is increased to 500 milliseconds. [in this case the '*' characters on the
LCD represent LED's]*/
#define mainNO_ERROR_CHECK_DELAY ( ( portTickType ) 3000 / portTICK_RATE_MS )
#define mainERROR_CHECK_DELAY ( ( portTickType ) 500 / portTICK_RATE_MS )
/*
* The function that implements the Check task. See the comments at the head
* of the page for implementation details.
*/
static void vErrorChecks( void *pvParameters );
/*
* Called by the Check task. Returns pdPASS if all the other tasks are found
* to be operating without error - otherwise returns pdFAIL.
*/
static portSHORT prvCheckOtherTasksAreStillRunning( void );
/*
* Perform the hardware setup required by the ES449 in order to run the demo
* application.
*/
static void prvSetupHardware( void );
/*-----------------------------------------------------------*/
/*
* Start the demo application tasks - then start the real time scheduler.
*/
int main( void )
{
/* Setup the hardware ready for the demo. */
prvSetupHardware();
vParTestInitialise();
/* Start the standard demo application tasks. */
vStartLEDFlashTasks( mainLED_TASK_PRIORITY );
vStartIntegerMathTasks( tskIDLE_PRIORITY );
vAltStartComTestTasks( mainCOM_TEST_PRIORITY, mainCOM_TEST_BAUD_RATE, mainCOM_TEST_LED - 1 );
vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
/* Start the 'Check' task which is defined in this file. */
xTaskCreate( vErrorChecks, "Check", configMINIMAL_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL );
/* Start the scheduler. */
vTaskStartScheduler();
/* As the scheduler has been started the demo applications tasks will be
executing and we should never get here! */
return 0;
}
/*-----------------------------------------------------------*/
static void vErrorChecks( void *pvParameters )
{
static volatile unsigned portLONG ulDummyVariable = 3UL;
portTickType xDelayPeriod = mainNO_ERROR_CHECK_DELAY;
/* Cycle for ever, delaying then checking all the other tasks are still
operating without error. */
for( ;; )
{
/* Wait until it is time to check again. The time we wait here depends
on whether an error has been detected or not. When an error is
detected the time is shortened resulting in a faster LED flash rate. */
vTaskDelay( xDelayPeriod );
/* Perform a bit of 32bit maths to ensure the registers used by the
integer tasks get some exercise outside of the integer tasks
themselves. The result here is not important we are just deliberately
changing registers used by other tasks to ensure that their context
switch is operating as required. - see the demo application
documentation for more info. */
ulDummyVariable *= 3UL;
/* See if the other tasks are all ok. */
if( prvCheckOtherTasksAreStillRunning() != pdPASS )
{
/* An error occurred in one of the tasks so shorten the delay
period - which has the effect of increasing the frequency of the
LED toggle. */
xDelayPeriod = mainERROR_CHECK_DELAY;
}
/* Flash! */
vParTestToggleLED( mainCHECK_LED );
}
}
/*-----------------------------------------------------------*/
static portSHORT prvCheckOtherTasksAreStillRunning( void )
{
static portSHORT sNoErrorFound = pdTRUE;
/* The demo tasks maintain a count that increments every cycle of the task
provided that the task has never encountered an error. This function
checks the counts maintained by the tasks to ensure they are still being
incremented. A count remaining at the same value between calls therefore
indicates that an error has been detected. Only tasks that do not flash
an LED are checked. */
if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
{
sNoErrorFound = pdFALSE;
}
if( xAreComTestTasksStillRunning() != pdTRUE )
{
sNoErrorFound = pdFALSE;
}
if( xArePollingQueuesStillRunning() != pdTRUE )
{
sNoErrorFound = pdFALSE;
}
return sNoErrorFound;
}
/*-----------------------------------------------------------*/
static void prvSetupHardware( void )
{
/* Stop the watchdog. */
WDTCTL = WDTPW + WDTHOLD;
/* Setup DCO+ for ( xtal * D * (N + 1) ) operation. */
FLL_CTL0 |= DCOPLUS + XCAP18PF;
/* X2 DCO frequency, 8MHz nominal DCO */
SCFI0 |= FN_4;
/* (121+1) x 32768 x 2 = 7.99 Mhz */
SCFQCTL = mainMAX_FREQUENCY;
/* Setup the IO as per the SoftBaugh demo for the same target hardware. */
P1SEL = 0x32;
P2SEL = 0x00;
P3SEL = 0x00;
P4SEL = 0xFC;
P5SEL = 0xFF;
}
/*-----------------------------------------------------------*/

87
Demo/msp430_GCC/makefile Normal file
View file

@ -0,0 +1,87 @@
# FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
#
# 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 as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# 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
# along with FreeRTOS; 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, 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.
#
# ***************************************************************************
# See http://www.FreeRTOS.org for documentation, latest information, license
# and contact details. Please ensure to read the configuration and relevant
# port sections of the online documentation.
# ***************************************************************************
CC=msp430-gcc
OBJCOPY=msp430-objcopy
DEBUG=-g
OPT=-Os
WARNINGS=-Wall -Wshadow -Wpointer-arith -Wbad-function-cast -Wcast-align -Wsign-compare \
-Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wunused
CFLAGS=-mmcu=msp430x449 $(OPT) $(DEBUG) -I. -I../../Source/include -I../Common/include -DGCC_MSP430 $(WARNINGS)
# Setup paths to source code
SOURCE_PATH = ../../Source
PORT_PATH = ../../Source/portable/GCC/MSP430F449
DEMO_PATH = ../Common/Minimal
#
# Source files that can be built to THUMB mode.
#
SRC = \
main.c \
ParTest/ParTest.c \
serial/serial.c \
$(SOURCE_PATH)/tasks.c \
$(SOURCE_PATH)/list.c \
$(SOURCE_PATH)/queue.c \
$(SOURCE_PATH)/portable/MemMang/heap_1.c \
$(PORT_PATH)/port.c \
$(DEMO_PATH)/flash.c \
$(DEMO_PATH)/integer.c \
$(DEMO_PATH)/comtest.c \
$(DEMO_PATH)/PollQ.c
#
# Define all object files.
#
OBJ = $(SRC:.c=.o)
a.out : $(OBJ) makefile
$(CC) $(OBJ) $(CFLAGS)
$(OBJ) : %.o : %.c makefile
$(CC) -c $(CFLAGS) $< -o $@
clean :
touch makefile

234
Demo/msp430_GCC/serial/serial.c Normal file
View file

@ -0,0 +1,234 @@
/*
FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
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 as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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
along with FreeRTOS; 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, 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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
***************************************************************************
*/
/* BASIC INTERRUPT DRIVEN SERIAL PORT DRIVER.
*
* This file only supports UART 1
*/
/* Standard includes. */
#include <stdlib.h>
#include <signal.h>
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "queue.h"
#include "task.h"
/* Demo application includes. */
#include "serial.h"
/* Constants required to setup the hardware. */
#define serTX_AND_RX ( ( unsigned portCHAR ) 0x03 )
/* Misc. constants. */
#define serNO_BLOCK ( ( portTickType ) 0 )
/* Enable the UART Tx interrupt. */
#define vInterruptOn() IFG2 |= UTXIFG1
/* The queue used to hold received characters. */
static xQueueHandle xRxedChars;
/* The queue used to hold characters waiting transmission. */
static xQueueHandle xCharsForTx;
static volatile portSHORT sTHREEmpty;
/* Interrupt service routines. */
interrupt (UART1RX_VECTOR) vRxISR( void );
interrupt (UART1TX_VECTOR) vTxISR( void );
/*-----------------------------------------------------------*/
xComPortHandle xSerialPortInitMinimal( unsigned portLONG ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
{
unsigned portLONG ulBaudRateCount;
/* Initialise the hardware. */
/* Generate the baud rate constants for the wanted baud rate. */
ulBaudRateCount = configCPU_CLOCK_HZ / ulWantedBaud;
portENTER_CRITICAL();
{
/* Create the queues used by the com test task. */
xRxedChars = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed portCHAR ) );
xCharsForTx = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed portCHAR ) );
/* Reset UART. */
UCTL1 |= SWRST;
/* Set pin function. */
P4SEL |= serTX_AND_RX;
/* All other bits remain at zero for n, 8, 1 interrupt driven operation.
LOOPBACK MODE!*/
U1CTL |= CHAR + LISTEN;
U1TCTL |= SSEL1;
/* Setup baud rate low byte. */
U1BR0 = ( unsigned portCHAR ) ( ulBaudRateCount & ( unsigned portLONG ) 0xff );
/* Setup baud rate high byte. */
ulBaudRateCount >>= 8UL;
U1BR1 = ( unsigned portCHAR ) ( ulBaudRateCount & ( unsigned portLONG ) 0xff );
/* Enable ports. */
ME2 |= UTXE1 + URXE1;
/* Set. */
UCTL1 &= ~SWRST;
/* Nothing in the buffer yet. */
sTHREEmpty = pdTRUE;
/* Enable interrupts. */
IE2 |= URXIE1 + UTXIE1;
}
portEXIT_CRITICAL();
/* Unlike other ports, this serial code does not allow for more than one
com port. We therefore don't return a pointer to a port structure and can
instead just return NULL. */
return NULL;
}
/*-----------------------------------------------------------*/
signed portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed portCHAR *pcRxedChar, portTickType xBlockTime )
{
/* 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 portCHAR cOutChar, portTickType xBlockTime )
{
signed portBASE_TYPE xReturn;
/* Transmit a character. */
portENTER_CRITICAL();
{
if( sTHREEmpty == pdTRUE )
{
/* If sTHREEmpty is true then the UART Tx ISR has indicated that
there are no characters queued to be transmitted - so we can
write the character directly to the shift Tx register. */
sTHREEmpty = pdFALSE;
U1TXBUF = cOutChar;
xReturn = pdPASS;
}
else
{
/* sTHREEmpty is false, so there are still characters waiting to be
transmitted. We have to queue this character so it gets
transmitted in turn. */
/* Return false if after the block time there is no room on the Tx
queue. It is ok to block inside a critical section as each task
maintains it's own critical section status. */
xReturn = xQueueSend( xCharsForTx, &cOutChar, xBlockTime );
/* Depending on queue sizing and task prioritisation: While we
were blocked waiting to post on the queue interrupts were not
disabled. It is possible that the serial ISR has emptied the
Tx queue, in which case we need to start the Tx off again
writing directly to the Tx register. */
if( ( sTHREEmpty == pdTRUE ) && ( xReturn == pdPASS ) )
{
/* Get back the character we just posted. */
xQueueReceive( xCharsForTx, &cOutChar, serNO_BLOCK );
sTHREEmpty = pdFALSE;
U1TXBUF = cOutChar;
}
}
}
portEXIT_CRITICAL();
return pdPASS;
}
/*-----------------------------------------------------------*/
/*
* UART RX interrupt service routine.
*/
interrupt (UART1RX_VECTOR) vRxISR( void )
{
signed portCHAR cChar;
/* Get the character from the UART and post it on the queue of Rxed
characters. */
cChar = U1RXBUF;
if( xQueueSendFromISR( xRxedChars, &cChar, pdFALSE ) )
{
/*If the post causes a task to wake force a context switch
as the woken task may have a higher priority than the task we have
interrupted. */
taskYIELD();
}
}
/*-----------------------------------------------------------*/
/*
* UART Tx interrupt service routine.
*/
interrupt (UART1TX_VECTOR) vTxISR( void )
{
signed portCHAR cChar;
portBASE_TYPE xTaskWoken;
/* The previous character has been transmitted. See if there are any
further characters waiting transmission. */
if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xTaskWoken ) == pdTRUE )
{
/* There was another character queued - transmit it now. */
U1TXBUF = cChar;
}
else
{
/* There were no other characters to transmit. */
sTHREEmpty = pdTRUE;
}
}