6

Test Güdümlü Geliştirilmiş Bir Kütüphane Örneği

Posted on by Mehmet Topuz

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Bu yazıda TDD( Test-Driven Development) prensiplerine göre geliştirmeye çalıştığım bir kütüphaneden bahsetmek istiyorum. Bir önceki yazıda bahsettiğim üzere TDD için başlıca kaynağım James Grenning’in Test-Driven Development for Embedded C kitabı olacak.  TDD için kullandığım unit test framework’ü ise CppUTest olacak.… Continue Reading →

21

Uzaktan Gömülü Yazılım Güncelleme

Posted on by Mehmet Topuz
Remote Firmware Update

Gömülü sistemler için önemli konulardan birisi de yazılımın uzaktan güncellenebilmesidir. İçinde gömülü yazılım barındıran ürünler geliştiriyoruz ve bazen bu ürünlerdeki gömülü yazılımı, kodlardaki hatalardan veya müşteri isteğine göre yazılımsal eklemeler, geliştirmeler yaparak güncelleme ihtiyacı duyuyoruz. Böyle durumlarda geliştirdiğimiz yeni yazılımı ürünlerin başına giderek güncellemek doğru bir seçim olmaz. Continue Reading →

4

FreeRTOS Notları #8: Task Notification

Posted on by Mehmet Topuz

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 Bu not serisinde tasklar arasında haberleşbilmenin birden fazla yolunu gördük. Bu yazıda tasklar arası haberleşme için task notification( task bildirim) mekanizmasına değinelim. Continue Reading →

4

FreeRTOS Notları #7: Event Groups

Posted on by Mehmet Topuz

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Daha önceki notlarda bahsettiğimiz gibi gerçek zamanlı gömülü sistemler oluşabilecek olaylara(events) karşı bir cevap vermek zorundadır. Önceki notlarda tasklar arasında oluşan olaylara cevap vermek için aşağıdaki özelliklere sahip Continue Reading →

0

FreeRTOS Notları #6: Mutex

Posted on by Mehmet Topuz

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Bir multitasking yapan sistemde birden fazla taskın aynı kaynağa erişmesinde sorunlar çıkabilir. Örneğin; 2×16 LCD ekrana yazı yazan iki task düşünelim. Bunlardan biri “Hello world” yazsın. Diğer task ise Continue Reading →

5

FreeRTOS Notları #5: Semaphore

Posted on by Mehmet Topuz

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 Semaphore konusuna başlamadan önce FreeRTOS’da kesme(interrupt) yönetimine değinmek istiyorum.Gömülü gerçek zamanlı sistemler ortamdan kaynaklanan olaylara(events) göre belli aksiyonlar(actions) almak zorundadır. Continue Reading →

4

FreeRTOS Notları #4: Yazılımsal Timer

Posted on by Mehmet Topuz

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FreeRTOS’da yazılımsal timer kernel kontrolünde çalışır. Kernel ise systick timer’ı kullandığı için yazılımsal timer systick timer’a göre çalışıyor diyebiliriz. Donanımsal bir timer değildir. Continue Reading →

0

FreeRTOS Notları #3: Queue(Kuyruk)

Posted on by Mehmet Topuz

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Kuyruk(Queue) veri yapılarından da hatırlayacağımız üzere doğrusal bir veri saklama yapısıdır. Bu konuyu basit bir örnekle somutlaştırabiliriz. Bir bankamatikten para çekmek istedik ve bankamatiğin önüne gittiğimizde bankamatiğin önünde uzunca bir sıra olduğunu gördük. Continue Reading →

4

FreeRTOS Notları #2: Task veya Thread

Posted on by Mehmet Topuz

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RTOS kullanan gerçek zamanlı uygulamalarda birbirinden bağımsız iş parçacıkları bulunabilir. Bu iş parçacıkları FreeRTOS da “task”, CMSIS_RTOS da ise”thread” olarak isimlendirilir. Continue Reading →