Chronicles from our peeps.
Finally I’ve changed the threading model of the AEMB. While some instructions are still buggy and hence the demo program doesn’t run properly, I still want to use this post and the next one to explain the changes I’ve made so far. In this post I’ll explain about the design Read more
The critical region is where only one task will run on FreeRTOS and that task will continue to run until it exits the critical region. There will not be any other task running during that phase. For the older AEMB2 with only one active thread, the FreeRTOS will disable the Read more
AEMB has just been updated last week. The fix will prevent the tasks from breaking out of their loop. This solves the problem I faced last time where the tasks run and goes into the main function. Therefore, the new AEMB will need to be tested again to check for Read more
Continuing from the previous test, an in depth look is taken on the output on AEMB. The GTKWave shows that the AEMB actually stop running anything at all on one thread . This is a huge error and means that the task not only stop running, but the FreeRTOS stops Read more
Regarding my previous post on the interrupt crashing the FreeRTOS tasks, I went and research on the method used for enabling and disabling interrupts on AEMB through software. There are two simple functions used to do the job, which are portDISABLE_INTERRUPTS() and portENABLE_INTERRUPTS(). These two functions will disable and enable Read more
I would like to look deeper into the application of FreeRTOS interrupts on the latest version of AEMB. It is important to be able to clearly identify the context switching by the interrupt on both threads of AEMB. To look more into the interrupts, the tasks are written with longer Read more
The task priority of FreeRTOS is tested on the new AEMB processor. The previous programs tested all contains tasks of equal priorities with the idle task. Therefore, higher priority tasks are to be tested to see their effect on the new AEMB processor. Will the higher priority tasks act independent Read more
This week, I set my mind on understanding on the switching of tasks inside FreeRTOS on the latest AEMB with two threads. From previous week, it was found that there was an infinite loop which act upon the second thread while the first thread will continue with FreeRTOS and all Read more
This week the focus was given on trying to develop a simple simulation to test out one of the algorithms discussed the previous week. The algorithm used to try out the simulation was the Uniform Dispersion algorithm. Some work was also done in the aspect of a proposed design for Read more
This week main project is to port FreeRTOS to the newer AEMB. In the previous weeks, the AEMB processor only fully utilizes one thread. It was the older version and the newer version actually fully utilizes two threads. I was instructed to make the necessary changes so that FreeRTOS will Read more