blob: 4f1418a60b1ba735e4ca1c6cdf450e6d09278fc2 [file] [log] [blame]
/*
* FreeRTOS Kernel V10.3.0
* Copyright (C) 2020 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!
*/
#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 );
}
/*---------------------------------------------------------------------------*/