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FreeRTOS Support ArchiveThe FreeRTOS support forum is used to obtain active support directly from Real Time Engineers Ltd. In return for using our top quality software and services for free, we request you play fair and do your bit to help others too! Sign up to receive notifications of new support topics then help where you can.
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Peripherals registers and mutexPosted by michaeln32 on August 22, 2017 Hello Lets say that I have system with 2 tasks. both of the tasks are writing and reading into and from HW Peripherals registers (for example data UART register or GPIO). It is necessary to use mutex on the HW Peripherals register in this case ? Thank You Michael Peripherals registers and mutexPosted by rtel on August 22, 2017 Your question is a bit too generic for a definitive answer, but the answer is most likely 'yes'. If you are writing to a a UART then it takes many writes to the UART registers to write the data to be transmitted character by character (of using a FIFO, or whatever), and many reads of the registers to control the output, and a finite time for the characters to actually be transmitted - so you only want one task doing that at a time. If two tasks were to access the UART at the same time you would get garbled output. Peripherals registers and mutexPosted by michaeln32 on August 22, 2017 Ok. Thank You !
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