March 2016
Beginner to intermediate
296 pages
6h 34m
English
Content preview from ARM?? Cortex?? M4 CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Why we must use a mutex to access the GLCD
How to do it…
To access the GLCD using mutual exclusion, follow the steps outlined:
- Create a new project and using the manager configure the RTE to provide support for the Graphic LCD.
- Create a new file named
RTXBlinky.c, add the boilerplate code, and then add this source file to the project. - Add the following code to
RTXBlinky.c:#include "stm32f4xx_hal.h" /* STM32F4xx Defs */ #include "RTXBlinkyUtils.h" #include "cmsis_os.h" osThreadId tid_taskA; /* id of thread: task_a */ osThreadId tid_taskB; /* id of thread: task_b */ osMutexId mut_GLCD; /* Mutex to control GLCD access */ /*-------------------------------------------------- * Switch LED on *--------------------------------------------------*/ void switch_On ...
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