mirror of
https://github.com/FreeRTOS/FreeRTOS-Kernel.git
synced 2025-08-19 17:48:33 -04:00
Add new NiosII demo project.
This commit is contained in:
Richard Barry
parent
5d6acacd7a
commit
523ffada03
24 changed files with 7270 additions and 0 deletions
241
Demo/NiosII_CycloneIII_DBC3C40_GCC/RTOSDemo/serial.c
Normal file
241
Demo/NiosII_CycloneIII_DBC3C40_GCC/RTOSDemo/serial.c
Normal file
|
|
@ -0,0 +1,241 @@
|
|||
/*
|
||||
FreeRTOS V5.4.1 - Copyright (C) 2009 Real Time Engineers Ltd.
|
||||
|
||||
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 exception 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.
|
||||
Alternative commercial license and support terms are also available upon
|
||||
request. See the licensing section of http://www.FreeRTOS.org for full
|
||||
license details.
|
||||
|
||||
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.
|
||||
|
||||
|
||||
***************************************************************************
|
||||
* *
|
||||
* Looking for a quick start? Then check out the FreeRTOS eBook! *
|
||||
* See http://www.FreeRTOS.org/Documentation for details *
|
||||
* *
|
||||
***************************************************************************
|
||||
|
||||
1 tab == 4 spaces!
|
||||
|
||||
Please ensure to read the configuration and relevant port sections of the
|
||||
online documentation.
|
||||
|
||||
http://www.FreeRTOS.org - Documentation, latest information, license and
|
||||
contact details.
|
||||
|
||||
http://www.SafeRTOS.com - A version that is certified for use in safety
|
||||
critical systems.
|
||||
|
||||
http://www.OpenRTOS.com - Commercial support, development, porting,
|
||||
licensing and training services.
|
||||
*/
|
||||
|
||||
/* NOTE: This is just a test file and not intended to be a generic
|
||||
COM driver. */
|
||||
|
||||
#include "altera_avalon_uart.h"
|
||||
#include "altera_avalon_uart_regs.h"
|
||||
#include "sys/alt_irq.h"
|
||||
|
||||
#include "FreeRTOS.h"
|
||||
#include "queue.h"
|
||||
#include "system.h"
|
||||
#include "Serial.h"
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
#define serINVALID_QUEUE ( ( xQueueHandle ) 0 )
|
||||
#define serNO_BLOCK ( ( portTickType ) 0 )
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
static xQueueHandle xRxedChars;
|
||||
static xQueueHandle xCharsForTx;
|
||||
|
||||
alt_u32 uartControl;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
static void vUARTInterruptHandler( void* context, alt_u32 id );
|
||||
static void vUARTReceiveHandler( alt_u32 status );
|
||||
static void vUARTTransmitHandler( alt_u32 status );
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
xComPortHandle xSerialPortInitMinimal( unsigned portLONG ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
|
||||
{
|
||||
/* Create the queues used to hold Rx and Tx characters. */
|
||||
xRxedChars = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed portCHAR ) );
|
||||
xCharsForTx = xQueueCreate( uxQueueLength + 1, ( unsigned portBASE_TYPE ) sizeof( signed portCHAR ) );
|
||||
|
||||
/* If the queues were created correctly then setup the serial port hardware. */
|
||||
if( ( xRxedChars != serINVALID_QUEUE ) && ( xCharsForTx != serINVALID_QUEUE ) )
|
||||
{
|
||||
portENTER_CRITICAL();
|
||||
{
|
||||
uartControl = ALTERA_AVALON_UART_CONTROL_RTS_MSK | ALTERA_AVALON_UART_CONTROL_RRDY_MSK | ALTERA_AVALON_UART_CONTROL_DCTS_MSK;
|
||||
IOWR_ALTERA_AVALON_UART_CONTROL( UART_BASE, uartControl );
|
||||
|
||||
/* register the interrupt handler */
|
||||
alt_irq_register ( UART_IRQ, NULL, vUARTInterruptHandler );
|
||||
}
|
||||
portEXIT_CRITICAL();
|
||||
}
|
||||
else
|
||||
{
|
||||
return ( xComPortHandle ) 0;
|
||||
}
|
||||
return ( xComPortHandle ) 1;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
void vSerialClose( xComPortHandle xPort )
|
||||
{
|
||||
/* Never used. */
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
signed portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed portCHAR *pcRxedChar, portTickType xBlockTime )
|
||||
{
|
||||
/* The port handle is not required as this driver only supports one port. */
|
||||
( 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
|
||||
{
|
||||
uartControl |= ALTERA_AVALON_UART_CONTROL_RRDY_MSK;
|
||||
IOWR_ALTERA_AVALON_UART_CONTROL( UART_BASE, uartControl );
|
||||
return pdFALSE;
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
signed portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, signed portCHAR cOutChar, portTickType xBlockTime )
|
||||
{
|
||||
signed portBASE_TYPE lReturn = pdPASS;
|
||||
|
||||
/* Place the character in the queue of characters to be transmitted. */
|
||||
if( xQueueSend( xCharsForTx, &cOutChar, xBlockTime ) == pdPASS )
|
||||
{
|
||||
/*Triggers an interrupt on every character or (down) when queue is full. */
|
||||
uartControl |= ALTERA_AVALON_UART_CONTROL_TRDY_MSK;
|
||||
IOWR_ALTERA_AVALON_UART_CONTROL( UART_BASE, uartControl );
|
||||
lReturn = pdPASS;
|
||||
}
|
||||
else
|
||||
{
|
||||
lReturn = pdFAIL;
|
||||
}
|
||||
return lReturn;
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
void vSerialPutString( xComPortHandle pxPort, const signed portCHAR * const pcString, unsigned portSHORT usStringLength )
|
||||
{
|
||||
signed portCHAR *pxNext;
|
||||
|
||||
/* A couple of parameters that this port does not use. */
|
||||
( void ) usStringLength;
|
||||
( void ) pxPort;
|
||||
|
||||
/* NOTE: This implementation does not handle the queue being full as no block time is used! */
|
||||
|
||||
/* The port handle is not required as this driver only supports UART0. */
|
||||
( void ) pxPort;
|
||||
|
||||
/* Send each character in the string, one at a time. */
|
||||
pxNext = ( signed portCHAR * ) pcString;
|
||||
while( *pxNext )
|
||||
{
|
||||
xSerialPutChar( pxPort, *pxNext, serNO_BLOCK );
|
||||
pxNext++;
|
||||
}
|
||||
}
|
||||
/*-----------------------------------------------------------*/
|
||||
|
||||
static void vUARTInterruptHandler( void* context, alt_u32 id )
|
||||
{
|
||||
alt_u32 status;
|
||||
|
||||
/* Read the status register in order to determine the cause of the
|
||||
interrupt. */
|
||||
status = IORD_ALTERA_AVALON_UART_STATUS( UART_BASE );
|
||||
|
||||
/* Clear any error flags set at the device */
|
||||
IOWR_ALTERA_AVALON_UART_STATUS( UART_BASE, 0 );
|
||||
|
||||
/* process a read irq */
|
||||
if ( status & ALTERA_AVALON_UART_STATUS_RRDY_MSK )
|
||||
{
|
||||
vUARTReceiveHandler( status );
|
||||
}
|
||||
|
||||
/* process a write irq */
|
||||
if ( status & ( ALTERA_AVALON_UART_STATUS_TRDY_MSK ) )
|
||||
{
|
||||
vUARTTransmitHandler( status );
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
static void vUARTReceiveHandler( alt_u32 status )
|
||||
{
|
||||
signed portCHAR cChar;
|
||||
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
|
||||
|
||||
/* If there was an error, discard the data */
|
||||
if ( status & ( ALTERA_AVALON_UART_STATUS_PE_MSK | ALTERA_AVALON_UART_STATUS_FE_MSK ) )
|
||||
{
|
||||
asm("break");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Transfer data from the device to the circular buffer */
|
||||
cChar = IORD_ALTERA_AVALON_UART_RXDATA( UART_BASE );
|
||||
if ( pdTRUE != xQueueSendFromISR( xRxedChars, &cChar, &xHigherPriorityTaskWoken ) )
|
||||
{
|
||||
/* If the circular buffer was full, disable interrupts. Interrupts will
|
||||
be re-enabled when data is removed from the buffer. */
|
||||
uartControl &= ~ALTERA_AVALON_UART_CONTROL_RRDY_MSK;
|
||||
IOWR_ALTERA_AVALON_UART_CONTROL( UART_BASE, uartControl );
|
||||
}
|
||||
|
||||
portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
||||
static void vUARTTransmitHandler( alt_u32 status )
|
||||
{
|
||||
signed portCHAR cChar;
|
||||
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
|
||||
/* Transfer data if there is some ready to be transferred */
|
||||
if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xHigherPriorityTaskWoken ) == pdTRUE )
|
||||
{
|
||||
IOWR_ALTERA_AVALON_UART_TXDATA( UART_BASE, cChar );
|
||||
}
|
||||
else
|
||||
{
|
||||
uartControl &= ~ALTERA_AVALON_UART_CONTROL_TRDY_MSK;
|
||||
}
|
||||
|
||||
IOWR_ALTERA_AVALON_UART_CONTROL( UART_BASE, uartControl );
|
||||
portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
Loading…
Add table
Add a link
Reference in a new issue