These VDK signals are quite different in their operation and intended usage. Bear in mind that this is a comparison between a single API call and a single API call, and so it is not really a definitive answer to your question. We do not keep performance metrics on the VDK ISR APIs (or VDK ISR assembly macros), but for the thread-level APIs posting a single VDK Semaphore is faster than setting VDK Event Bits.
You may also require to convey some information from the ISR, in which case setting VDK Event Bits might be a better solution than using a semaphore.
#TM4C ANALOG SEMAPHOR BIT SERIES#
For more information: Visit the TM4C Series forums on TI E2E. TivaWare for C Series 32-bit Windows Examples. Or you could make a single API call to set some VDK Event Bits, but then within one of your threads you’ll need to clear the appropriate VDK Event Bits. TivaWare for C Series Boot Loader User Guide. To wake three threads every time your ISR posts then you’ll need to make three Post Semaphore API calls, which will increase the amount of time your ISR takes to execute. You want * just one * of the threads to wake each time the ISR posts? You want * all three * threads to wake each time the ISR posts? Baud divisor is the value that will be loaded to baud control registers such as UARTIBRD and UARTFBRD. The TM4C123 Tiva C launchpad has an onboard 16MHz crystal. Your question is a little unclear, do you mean: UART Baud Rate ( f / 16 x baud divisor) Where f is the clock frequency of the UART module which is known and equal to system frequency.
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