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//******************************************************************************
// @file AppTask.cpp
// @author Nicolai Shlapunov
//
// @details DevCore: Application Task Base Class, implementation
//
// @copyright Copyright (c) 2016, Devtronic & Nicolai Shlapunov
// All rights reserved.
//
// @section SUPPORT
//
// Devtronic invests time and resources providing this open source code,
// please support Devtronic and open-source hardware/software by
// donations and/or purchasing products from Devtronic.
//
//******************************************************************************
// *****************************************************************************
// *** Includes ************************************************************
// *****************************************************************************
#include "AppTask.h"
#include "RtosMutex.h"
// *****************************************************************************
// *** Static variables ****************************************************
// *****************************************************************************
static RtosMutex startup_mutex;
static uint32_t startup_cnt = 0U;
// *****************************************************************************
// *** Create task function ************************************************
// *****************************************************************************
void AppTask::CreateTask()
{
Result result = Result::RESULT_OK;
// If interval timer period isn't zero or task queue present
if((timer.GetTimerPeriod() != 0U) || (task_queue.GetQueueLen() != 0U))
{
// Set Control Queue name
ctrl_queue.SetName(task_name, "Ctrl");
// Create control queue
result = ctrl_queue.Create();
}
// If task queue present
if(task_queue.GetQueueLen() != 0U)
{
// Set Task Queue name
task_queue.SetName(task_name, "Task");
// Create task queue
result |= task_queue.Create();
}
// If interval timer period isn't zero
if(timer.GetTimerPeriod() != 0U)
{
// Create timer
result |= timer.Create();
}
// Create task: function - TaskFunctionCallback(), parameter - pointer to "this"
result |= Rtos::TaskCreate(TaskFunctionCallback, task_name, stack_size, this, task_priority);
// Check result
if(result.IsBad())
{
// TODO: implement error handling
Break();
}
}
// *****************************************************************************
// *** SendTaskMessage function ********************************************
// *****************************************************************************
Result AppTask::SendTaskMessage(const void* task_msg, bool is_priority)
{
Result result = Result::RESULT_OK;
// Send task message to front or back of task queue
if(is_priority == true)
{
result = task_queue.SendToFront(task_msg);
}
else
{
result = task_queue.SendToBack(task_msg);
}
// If successful - send message to the control queue
if(result.IsGood())
{
CtrlQueueMsg ctrl_msg;
ctrl_msg.type = CTRL_TASK_QUEUE_MSG;
result = SendControlMessage(ctrl_msg, is_priority);
}
return result;
}
// *****************************************************************************
// *** IntLoop function ****************************************************
// *****************************************************************************
Result AppTask::IntLoop()
{
Result result = Result::RESULT_OK;
while(result.IsGood())
{
// Buffer for control message
CtrlQueueMsg ctrl_msg;
// Read on the control queue
result = ctrl_queue.Receive(&ctrl_msg, timer.GetTimerPeriod() * 2U);
// If successful
if(result.IsGood())
{
// Check message type
switch(ctrl_msg.type)
{
case CTRL_TIMER_MSG:
result = TimerExpired();
break;
case CTRL_TASK_QUEUE_MSG:
{
// Non blocking read from the task queue
result = task_queue.Receive(task_msg_ptr, 0U);
// If successful
if(result.IsGood())
{
// Process it!
result = ProcessMessage();
}
break;
}
default:
result = Result::ERR_INVALID_ITEM;
break;
}
}
}
return result;
}
// *****************************************************************************
// *** TaskFunctionCallback ************************************************
// *****************************************************************************
void AppTask::TaskFunctionCallback(void* ptr)
{
Result result = Result::ERR_NULL_PTR;
if(ptr != nullptr)
{
// Set good result
result = Result::RESULT_OK;
// Get reference to the task object
AppTask& app_task = *(static_cast<AppTask*>(ptr));
// Increment counter before call Setup()
ChangeCnt(true);
// Call virtual Setup() function from AppTask class
app_task.Setup();
// Decrement counter after call Setup()
ChangeCnt(false);
// Pause for give other tasks run Setup()
RtosTick::DelayTicks(1U);
// Pause while other tasks run Setup() before executing any Loop()
while(startup_cnt) RtosTick::DelayTicks(1U);
// If no timer or queue - just call Loop() function
if((app_task.timer.GetTimerPeriod() == 0U) && (app_task.task_queue.GetQueueLen() == 0U))
{
// Call virtual Loop() function from AppTask class
while(app_task.Loop() == Result::RESULT_OK);
}
else
{
// Start task timer if needed
if(app_task.timer.GetTimerPeriod() != 0U)
{
result = app_task.timer.Start();
}
// Check result
if(result.IsGood())
{
// Call internal AppTask function
result = app_task.IntLoop();
}
// Stop task timer if needed
if(app_task.timer.GetTimerPeriod() != 0U)
{
result |= app_task.timer.Stop();
}
}
}
// Check result
if(result.IsBad())
{
// TODO: implement error handling
Break();
}
// Delete task after exit
Rtos::TaskDelete();
}
// *****************************************************************************
// *** TimerCallback function **********************************************
// *****************************************************************************
void AppTask::TimerCallback(void* ptr)
{
Result result = Result::ERR_NULL_PTR;
if(ptr != nullptr)
{
// Get reference to the task object
AppTask& task = *((AppTask*)ptr);
// Create control timer message
CtrlQueueMsg timer_msg;
timer_msg.type = CTRL_TIMER_MSG;
// Send message to the control queue
result = task.SendControlMessage(timer_msg);
}
// Check result
if(result.IsBad())
{
// TODO: implement error handling
Break();
}
}
// *****************************************************************************
// *** SendControlMessage function *****************************************
// *****************************************************************************
Result AppTask::SendControlMessage(const CtrlQueueMsg& ctrl_msg, bool is_priority)
{
Result result;
if(is_priority == true)
{
result = ctrl_queue.SendToFront(&ctrl_msg);
}
else
{
result = ctrl_queue.SendToBack(&ctrl_msg);
}
return result;
}
// *****************************************************************************
// *** Change counter ******************************************************
// *****************************************************************************
void AppTask::ChangeCnt(bool is_up)
{
// Take semaphore before change counter
startup_mutex.Lock();
// Check direction
if(is_up == true)
{
// Increment counter
startup_cnt++;
}
else
{
// Decrement counter
startup_cnt--;
}
// Give semaphore after changes
startup_mutex.Release();
}
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