FreeRTOS/Demo/CORTEX_CY8C5588_PSoC_Creator_RVDS/FreeRTOS_Demo.cydsn/Serial.c - nest-detect/1.1.1/freertos - Git at Google

 /*
     FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd.
     All rights reserved

     VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

     ***************************************************************************
      *                                                                       *
      *    FreeRTOS provides completely free yet professionally developed,    *
      *    robust, strictly quality controlled, supported, and cross          *
      *    platform software that has become a de facto standard.             *
      *                                                                       *
      *    Help yourself get started quickly and support the FreeRTOS         *
      *    project by purchasing a FreeRTOS tutorial book, reference          *
      *    manual, or both from: http://www.FreeRTOS.org/Documentation        *
      *                                                                       *
      *    Thank you!                                                         *
      *                                                                       *
     ***************************************************************************

     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.  Full license text is available from the following
     link: http://www.freertos.org/a00114.html

     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, books, training, latest versions,
     license and Real Time Engineers Ltd. contact details.

     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
     including FreeRTOS+Trace - an indispensable productivity tool, a DOS
     compatible FAT file system, and our tiny thread aware UDP/IP stack.

     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
     Integrity Systems to sell under the OpenRTOS brand.  Low cost OpenRTOS
     licenses offer ticketed support, indemnification and middleware.

     http://www.SafeRTOS.com - High Integrity Systems also provide a safety
     engineered and independently SIL3 certified version for use in safety and
     mission critical applications that require provable dependability.

     1 tab == 4 spaces!
 */

 #include <device.h>
 #include "FreeRTOS.h"
 #include "queue.h"
 #include "task.h"
 #include "serial.h"
 /*---------------------------------------------------------------------------*/

 #define serialSTRING_DELAY_TICKS		( portMAX_DELAY )
 /*---------------------------------------------------------------------------*/

 CY_ISR_PROTO( vUartRxISR );
 CY_ISR_PROTO( vUartTxISR );
 /*---------------------------------------------------------------------------*/

 static QueueHandle_t xSerialTxQueue = NULL;
 static QueueHandle_t xSerialRxQueue = NULL;
 /*---------------------------------------------------------------------------*/

 xComPortHandle xSerialPortInitMinimal( unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
 {
 	/* Configure Rx. */
 	xSerialRxQueue = xQueueCreate( uxQueueLength, sizeof( signed char ) );
 	isr_UART1_RX_BYTE_RECEIVED_ClearPending();
 	isr_UART1_RX_BYTE_RECEIVED_StartEx(vUartRxISR);

 	/* Configure Tx */
 	xSerialTxQueue = xQueueCreate( uxQueueLength, sizeof( signed char ) );
 	isr_UART1_TX_BYTE_COMPLETE_ClearPending() ;
 	isr_UART1_TX_BYTE_COMPLETE_StartEx(vUartTxISR);

 	/* Clear the interrupt modes for the Tx for the time being. */
 	UART_1_SetTxInterruptMode( 0 );

 	/* Both configured successfully. */
 	return ( xComPortHandle )( xSerialTxQueue && xSerialRxQueue );
 }
 /*---------------------------------------------------------------------------*/

 void vSerialPutString( xComPortHandle pxPort, const signed char * const pcString, unsigned short usStringLength )
 {
 unsigned short usIndex = 0;

 	for( usIndex = 0; usIndex < usStringLength; usIndex++ )
 	{
 		/* Check for pre-mature end of line. */
 		if( '\0' == pcString[ usIndex ] )
 		{
 			break;
 		}

 		/* Send out, one character at a time. */
 		if( pdTRUE != xSerialPutChar( NULL, pcString[ usIndex ], serialSTRING_DELAY_TICKS ) )
 		{
 			/* Failed to send, this will be picked up in the receive comtest task. */
 		}
 	}
 }
 /*---------------------------------------------------------------------------*/

 signed portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed char *pcRxedChar, TickType_t xBlockTime )
 {
 portBASE_TYPE xReturn = pdFALSE;

 	if( pdTRUE == xQueueReceive( xSerialRxQueue, pcRxedChar, xBlockTime ) )
 	{
 		/* Picked up a character. */
 		xReturn = pdTRUE;
 	}
 	return xReturn;
 }
 /*---------------------------------------------------------------------------*/

 signed portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, signed char cOutChar, TickType_t xBlockTime )
 {
 portBASE_TYPE xReturn = pdFALSE;

 	/* The ISR is processing characters is so just add to the end of the queue. */
 	if( pdTRUE == xQueueSend( xSerialTxQueue, &cOutChar, xBlockTime ) )
 	{
 		xReturn = pdTRUE;
 	}
 	else
 	{
 		/* The queue is probably full. */
 		xReturn = pdFALSE;
 	}

 	/* Make sure that the interrupt will fire in the case where:
 	    Currently sending so the Tx Complete will fire.
 	    Not sending so the Empty will fire.	*/
 	taskENTER_CRITICAL();
 		UART_1_SetTxInterruptMode( UART_1_TX_STS_COMPLETE | UART_1_TX_STS_FIFO_EMPTY );
 	taskEXIT_CRITICAL();

 	return xReturn;
 }
 /*---------------------------------------------------------------------------*/

 CY_ISR(vUartRxISR)
 {
 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
 volatile unsigned char ucStatus = 0;
 signed char cInChar = 0;
 unsigned long ulMask = 0;

 	/* Read the status to acknowledge. */
 	ucStatus = UART_1_ReadRxStatus();

 	/* Only interested in a character being received. */
 	if( 0 != ( ucStatus & UART_1_RX_STS_FIFO_NOTEMPTY ) )
 	{
 		/* Get the character. */
 		cInChar = UART_1_GetChar();

 		/* Mask off the other RTOS interrupts to interact with the queue. */
 		ulMask = portSET_INTERRUPT_MASK_FROM_ISR();
 		{
 			/* Try to deliver the character. */
 			if( pdTRUE != xQueueSendFromISR( xSerialRxQueue, &cInChar, &xHigherPriorityTaskWoken ) )
 			{
 				/* Run out of space. */
 			}
 		}
 		portCLEAR_INTERRUPT_MASK_FROM_ISR( ulMask );
 	}

 	/* If we delivered the character then a context switch might be required.
 	xHigherPriorityTaskWoken was set to pdFALSE on interrupt entry.  If calling
 	xQueueSendFromISR() caused a task to unblock, and the unblocked task has
 	a priority equal to or higher than the currently running task (the task this
 	ISR interrupted), then xHigherPriorityTaskWoken will have been set to pdTRUE and
 	portEND_SWITCHING_ISR() will request a context switch to the newly unblocked
 	task. */
 	portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
 }
 /*---------------------------------------------------------------------------*/

 CY_ISR(vUartTxISR)
 {
 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
 volatile unsigned char ucStatus = 0;
 signed char cOutChar = 0;
 unsigned long ulMask = 0;

 	/* Read the status to acknowledge. */
 	ucStatus = UART_1_ReadTxStatus();

 	/* Check to see whether this is a genuine interrupt. */
 	if( ( 0 != ( ucStatus & UART_1_TX_STS_COMPLETE ) ) || ( 0 != ( ucStatus & UART_1_TX_STS_FIFO_EMPTY ) ) )
 	{
 		/* Mask off the other RTOS interrupts to interact with the queue. */
 		ulMask = portSET_INTERRUPT_MASK_FROM_ISR();
 		{
 			if( pdTRUE == xQueueReceiveFromISR( xSerialTxQueue, &cOutChar, &xHigherPriorityTaskWoken ) )
 			{
 				/* Send the next character. */
 				UART_1_PutChar( cOutChar );

 				/* If we are firing, then the only interrupt we are interested in
 				is the Complete. The application code will add the Empty interrupt
 				when there is something else to be done. */
 				UART_1_SetTxInterruptMode( UART_1_TX_STS_COMPLETE );
 			}
 			else
 			{
 				/* There is no work left so disable the interrupt until the application
 				puts more into the queue. */
 				UART_1_SetTxInterruptMode( 0 );
 			}
 		}
 		portCLEAR_INTERRUPT_MASK_FROM_ISR( ulMask );
 	}

 	/* If we delivered the character then a context switch might be required.
 	xHigherPriorityTaskWoken was set to pdFALSE on interrupt entry.  If calling
 	xQueueSendFromISR() caused a task to unblock, and the unblocked task has
 	a priority equal to or higher than the currently running task (the task this
 	ISR interrupted), then xHigherPriorityTaskWoken will have been set to pdTRUE and
 	portEND_SWITCHING_ISR() will request a context switch to the newly unblocked
 	task. */
 	portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
 }
 /*---------------------------------------------------------------------------*/
	/*
	FreeRTOS V8.0.1 - Copyright (C) 2014 Real Time Engineers Ltd.
	All rights reserved

	VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

	***************************************************************************
	* *
	* FreeRTOS provides completely free yet professionally developed, *
	* robust, strictly quality controlled, supported, and cross *
	* platform software that has become a de facto standard. *
	* *
	* Help yourself get started quickly and support the FreeRTOS *
	* project by purchasing a FreeRTOS tutorial book, reference *
	* manual, or both from: http://www.FreeRTOS.org/Documentation *
	* *
	* Thank you! *
	* *
	***************************************************************************

	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. Full license text is available from the following
	link: http://www.freertos.org/a00114.html

	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, books, training, latest versions,
	license and Real Time Engineers Ltd. contact details.

	http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
	including FreeRTOS+Trace - an indispensable productivity tool, a DOS
	compatible FAT file system, and our tiny thread aware UDP/IP stack.

	http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
	Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
	licenses offer ticketed support, indemnification and middleware.

	http://www.SafeRTOS.com - High Integrity Systems also provide a safety
	engineered and independently SIL3 certified version for use in safety and
	mission critical applications that require provable dependability.

	1 tab == 4 spaces!
	*/

	#include <device.h>
	#include "FreeRTOS.h"
	#include "queue.h"
	#include "task.h"
	#include "serial.h"
	/---------------------------------------------------------------------------/

	#define serialSTRING_DELAY_TICKS ( portMAX_DELAY )
	/---------------------------------------------------------------------------/

	CY_ISR_PROTO( vUartRxISR );
	CY_ISR_PROTO( vUartTxISR );
	/---------------------------------------------------------------------------/

	static QueueHandle_t xSerialTxQueue = NULL;
	static QueueHandle_t xSerialRxQueue = NULL;
	/---------------------------------------------------------------------------/

	xComPortHandle xSerialPortInitMinimal( unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
	{
	/* Configure Rx. */
	xSerialRxQueue = xQueueCreate( uxQueueLength, sizeof( signed char ) );
	isr_UART1_RX_BYTE_RECEIVED_ClearPending();
	isr_UART1_RX_BYTE_RECEIVED_StartEx(vUartRxISR);

	/* Configure Tx */
	xSerialTxQueue = xQueueCreate( uxQueueLength, sizeof( signed char ) );
	isr_UART1_TX_BYTE_COMPLETE_ClearPending() ;
	isr_UART1_TX_BYTE_COMPLETE_StartEx(vUartTxISR);

	/* Clear the interrupt modes for the Tx for the time being. */
	UART_1_SetTxInterruptMode( 0 );

	/* Both configured successfully. */
	return ( xComPortHandle )( xSerialTxQueue && xSerialRxQueue );
	}
	/---------------------------------------------------------------------------/

	void vSerialPutString( xComPortHandle pxPort, const signed char * const pcString, unsigned short usStringLength )
	{
	unsigned short usIndex = 0;

	for( usIndex = 0; usIndex < usStringLength; usIndex++ )
	{
	/* Check for pre-mature end of line. */
	if( '\0' == pcString[ usIndex ] )
	{
	break;
	}

	/* Send out, one character at a time. */
	if( pdTRUE != xSerialPutChar( NULL, pcString[ usIndex ], serialSTRING_DELAY_TICKS ) )
	{
	/* Failed to send, this will be picked up in the receive comtest task. */
	}
	}
	}
	/---------------------------------------------------------------------------/

	signed portBASE_TYPE xSerialGetChar( xComPortHandle pxPort, signed char *pcRxedChar, TickType_t xBlockTime )
	{
	portBASE_TYPE xReturn = pdFALSE;

	if( pdTRUE == xQueueReceive( xSerialRxQueue, pcRxedChar, xBlockTime ) )
	{
	/* Picked up a character. */
	xReturn = pdTRUE;
	}
	return xReturn;
	}
	/---------------------------------------------------------------------------/

	signed portBASE_TYPE xSerialPutChar( xComPortHandle pxPort, signed char cOutChar, TickType_t xBlockTime )
	{
	portBASE_TYPE xReturn = pdFALSE;

	/* The ISR is processing characters is so just add to the end of the queue. */
	if( pdTRUE == xQueueSend( xSerialTxQueue, &cOutChar, xBlockTime ) )
	{
	xReturn = pdTRUE;
	}
	else
	{
	/* The queue is probably full. */
	xReturn = pdFALSE;
	}

	/* Make sure that the interrupt will fire in the case where:
	Currently sending so the Tx Complete will fire.
	Not sending so the Empty will fire. */
	taskENTER_CRITICAL();
	UART_1_SetTxInterruptMode( UART_1_TX_STS_COMPLETE \| UART_1_TX_STS_FIFO_EMPTY );
	taskEXIT_CRITICAL();

	return xReturn;
	}
	/---------------------------------------------------------------------------/

	CY_ISR(vUartRxISR)
	{
	portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
	volatile unsigned char ucStatus = 0;
	signed char cInChar = 0;
	unsigned long ulMask = 0;

	/* Read the status to acknowledge. */
	ucStatus = UART_1_ReadRxStatus();

	/* Only interested in a character being received. */
	if( 0 != ( ucStatus & UART_1_RX_STS_FIFO_NOTEMPTY ) )
	{
	/* Get the character. */
	cInChar = UART_1_GetChar();

	/* Mask off the other RTOS interrupts to interact with the queue. */
	ulMask = portSET_INTERRUPT_MASK_FROM_ISR();
	{
	/* Try to deliver the character. */
	if( pdTRUE != xQueueSendFromISR( xSerialRxQueue, &cInChar, &xHigherPriorityTaskWoken ) )
	{
	/* Run out of space. */
	}
	}
	portCLEAR_INTERRUPT_MASK_FROM_ISR( ulMask );
	}

	/* If we delivered the character then a context switch might be required.
	xHigherPriorityTaskWoken was set to pdFALSE on interrupt entry. If calling
	xQueueSendFromISR() caused a task to unblock, and the unblocked task has
	a priority equal to or higher than the currently running task (the task this
	ISR interrupted), then xHigherPriorityTaskWoken will have been set to pdTRUE and
	portEND_SWITCHING_ISR() will request a context switch to the newly unblocked
	task. */
	portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
	}
	/---------------------------------------------------------------------------/

	CY_ISR(vUartTxISR)
	{
	portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
	volatile unsigned char ucStatus = 0;
	signed char cOutChar = 0;
	unsigned long ulMask = 0;

	/* Read the status to acknowledge. */
	ucStatus = UART_1_ReadTxStatus();

	/* Check to see whether this is a genuine interrupt. */
	if( ( 0 != ( ucStatus & UART_1_TX_STS_COMPLETE ) ) \|\| ( 0 != ( ucStatus & UART_1_TX_STS_FIFO_EMPTY ) ) )
	{
	/* Mask off the other RTOS interrupts to interact with the queue. */
	ulMask = portSET_INTERRUPT_MASK_FROM_ISR();
	{
	if( pdTRUE == xQueueReceiveFromISR( xSerialTxQueue, &cOutChar, &xHigherPriorityTaskWoken ) )
	{
	/* Send the next character. */
	UART_1_PutChar( cOutChar );

	/* If we are firing, then the only interrupt we are interested in
	is the Complete. The application code will add the Empty interrupt
	when there is something else to be done. */
	UART_1_SetTxInterruptMode( UART_1_TX_STS_COMPLETE );
	}
	else
	{
	/* There is no work left so disable the interrupt until the application
	puts more into the queue. */
	UART_1_SetTxInterruptMode( 0 );
	}
	}
	portCLEAR_INTERRUPT_MASK_FROM_ISR( ulMask );
	}

	/* If we delivered the character then a context switch might be required.
	xHigherPriorityTaskWoken was set to pdFALSE on interrupt entry. If calling
	xQueueSendFromISR() caused a task to unblock, and the unblocked task has
	a priority equal to or higher than the currently running task (the task this
	ISR interrupted), then xHigherPriorityTaskWoken will have been set to pdTRUE and
	portEND_SWITCHING_ISR() will request a context switch to the newly unblocked
	task. */
	portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
	}
	/---------------------------------------------------------------------------/