Speed measurement using the improved DMA transfer method
Milan D. Prokin · IEEE Transactions on Industrial Electronics · 1991
A wide-range speed measurement method using the direct memory access (DMA) transfer of a content of the timer to the memory is presented. The DMA method is based on both pulse counting and time measurement during the constant sampling time. The hardware configuration and algorithms for a microcontroller implementation are also presented. The proposed method is suitable in systems using microcontrollers with integrated DMA controller and timers. Limitations and sources of errors are discussed in detail.>