| /* | |
| FreeRTOS V8.2.1 - Copyright (C) 2015 Real Time Engineers Ltd. | |
| All rights reserved | |
| VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. | |
| 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 on the following | |
| link: http://www.freertos.org/a00114.html | |
| *************************************************************************** | |
| * * | |
| * FreeRTOS provides completely free yet professionally developed, * | |
| * robust, strictly quality controlled, supported, and cross * | |
| * platform software that is more than just the market leader, it * | |
| * is the industry's de facto standard. * | |
| * * | |
| * Help yourself get started quickly while simultaneously helping * | |
| * to support the FreeRTOS project by purchasing a FreeRTOS * | |
| * tutorial book, reference manual, or both: * | |
| * http://www.FreeRTOS.org/Documentation * | |
| * * | |
| *************************************************************************** | |
| http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading | |
| the FAQ page "My application does not run, what could be wrong?". Have you | |
| defined configASSERT()? | |
| http://www.FreeRTOS.org/support - In return for receiving this top quality | |
| embedded software for free we request you assist our global community by | |
| participating in the support forum. | |
| http://www.FreeRTOS.org/training - Investing in training allows your team to | |
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| Ltd, and the world's leading authority on the world's leading RTOS. | |
| http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, | |
| including FreeRTOS+Trace - an indispensable productivity tool, a DOS | |
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| Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS. | |
| http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High | |
| Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS | |
| licenses offer ticketed support, indemnification and commercial 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! | |
| */ | |
| /* | |
| Changes from V3.0.0 | |
| + ISRcode pulled inline to reduce stack-usage. | |
| + Added functionality to only call vTaskSwitchContext() once | |
| when handling multiple interruptsources in a single interruptcall. | |
| + Filename changed to a .c extension to allow stepping through code | |
| using F7. | |
| Changes from V3.0.1 | |
| */ | |
| #ifndef _FREERTOS_SERIAL_ISRSERIALTX_C | |
| #define _FREERTOS_SERIAL_ISRSERIALTX_C | |
| #define serINTERRUPT_DISABLED ( 0 ) | |
| { | |
| /* | |
| * Was the interrupt the Tx register becoming empty? | |
| */ | |
| if( bTXIF && bTXIE) | |
| { | |
| /* | |
| * Queue to interface between comms API and interrupt routine. | |
| */ | |
| extern QueueHandle_t xCharsForTx; | |
| /* | |
| * Because we are not allowed to use local variables here, | |
| * PRODL and PRODH are (ab)used as temporary storage. This | |
| * is allowed because these SFR's will be restored before | |
| * exiting the ISR. | |
| */ | |
| extern char cChar; | |
| #pragma locate cChar &PRODL | |
| extern portBASE_TYPE pxTaskWoken; | |
| #pragma locate pxTaskWoken &PRODH | |
| if( xQueueReceiveFromISR( xCharsForTx, &cChar, &pxTaskWoken ) == pdTRUE ) | |
| { | |
| /* | |
| * Send the next character queued for Tx. | |
| */ | |
| TXREG = cChar; | |
| } | |
| else | |
| { | |
| /* | |
| * Queue empty, nothing to send. | |
| */ | |
| bTXIE = serINTERRUPT_DISABLED; | |
| } | |
| /* | |
| * If we woke another task, ask for a contextswitch | |
| */ | |
| if( pxTaskWoken == pdTRUE ) | |
| { | |
| uxSwitchRequested = pdTRUE; | |
| } | |
| } | |
| } | |
| #endif /* _FREERTOS_SERIAL_ISRSERIALTX_C */ |