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Semaphores are supported at hardware level by the TM4C123GH6PM. Provide the suggested steps your program should...

Semaphores are supported at hardware level by the TM4C123GH6PM. Provide the suggested steps your program should follow to use semaphores on this MCU.

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Answer #1

Answer :- Software can use the synchronization primitives to implement a semaphore as follows:

1. Use a Load-Exclusive instruction to read from the semaphore address to check whether the
semaphore is free.
2. If the semaphore is free, use a Store-Exclusive to write the claim value to the semaphore
address.
3. If the returned status bit from step 2 indicates that the Store-Exclusive succeeded, then the
software has claimed the semaphore. However, if the Store-Exclusive failed, another process
might have claimed the semaphore after the software performed step 1.

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