You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/*
|
|
* FreeRTOS Kernel V10.2.1
|
|
* Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
* this software and associated documentation files (the "Software"), to deal in
|
|
* the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
|
* the Software, and to permit persons to whom the Software is furnished to do so,
|
|
* subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* http://www.FreeRTOS.org
|
|
* http://aws.amazon.com/freertos
|
|
*
|
|
* 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 */
|