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/*
* FreeRTOS V202107.00
* 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.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/* Standard includes. */
#include <stdio.h>
/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "board.h"
#include "fsl_usart.h"
/* Demo interface include. */
#include "uart_demo.h"
/**
* @brief The command menu presented to the user.
*/
#define UART_COMMAND_MENU "\r\nChoose one of the following:\r\n" \
"1. Get current tick count.\r\n" \
"2. Get number of tasks.\r\n"
#define UART_COMMAND_MENU_LEN ( sizeof( UART_COMMAND_MENU ) - 1 )
/**
* @brief Prompt for the user input.
*/
#define UART_PROMPT_STR "> "
#define UART_PROMPT_STR_LEN ( sizeof( UART_PROMPT_STR ) - 1 )
/**
* @brief Valid commands entered by the user.
*/
#define GET_TICK_COUNT_COMMAND 49 /* ASCII code for char '1'. */
#define GET_NUM_TASKS_COMMAND 50 /* ASCII code for char '2'. */
/**
* @brief Length of the buffer used for the response.
*/
#define UART_RESPONSE_BUF_LEN ( 32 )
/*-----------------------------------------------------------*/
/* The following needs to be placed in the shared memory as it is accessed in
* the UART received IRQ handler which is unprivileged. */
TaskHandle_t xUartDemoTaskHandle __attribute__( ( section( "user_irq_shared_memory" ) ) );
/*-----------------------------------------------------------*/
void vUartDemoTask( void * pvParams )
{
/* Silence compiler warnings about unused variables. */
( void ) pvParams;
for( ;; )
{
USART_WriteBlocking( USART0, UART_COMMAND_MENU, UART_COMMAND_MENU_LEN );
USART_WriteBlocking( USART0, UART_PROMPT_STR, UART_PROMPT_STR_LEN );
ulTaskNotifyTake( pdFALSE, portMAX_DELAY );
}
}
/*-----------------------------------------------------------*/
void vUartDataReceivedIRQHandler( uint32_t ulData )
{
char response[ UART_RESPONSE_BUF_LEN ];
if( ulData == GET_TICK_COUNT_COMMAND )
{
TickType_t xTickCount = xTaskGetTickCount();
snprintf( response, sizeof( response ), "%c\r\nTick Count: %u\r\n", ( char ) ulData, xTickCount );
}
else if( ulData == GET_NUM_TASKS_COMMAND )
{
UBaseType_t xTaskCount = uxTaskGetNumberOfTasks();
snprintf( response, sizeof( response ), "%c\r\nTask Count: %u\r\n", ( char ) ulData, xTaskCount );
}
else
{
snprintf( response, sizeof( response ), "\r\nInvalid command: %c.\r\n", ( char ) ulData );
}
/* Print the response and unblock the UART demo task. */
USART_WriteBlocking( USART0, response, strlen( response ) );
xTaskNotifyGive( xUartDemoTaskHandle );
}
/*-----------------------------------------------------------*/
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