International Journal of Engineering and Technology

This paper presents a new wide-range speed measurement method, using the direct memory access (DMA) terminal count register(TCR). The DMA method is based on both pulse counting in the constant sampling time at terminal count stop pin of a DMA controller. The hardware configuration and algorithms for a microcontroller implementation are also presented. The proposed method is suitable in systems using microcontrollers with DMA controller and timers. Limitations and sources of errors are discussed in details. The DMA Terminal count register method is suitable for real-time speed control systems.