This paper proposes the design and development of a modular pressure transmitter having wireless data transmission capability. The transmitter and receiver systems are made of completely off-the-shelf components. Transmitter module has a MEMS based pressure sensor. A microcontroller in the transmitter does the analog to digital signal conversion and baud rate setting. Serial data is then sent to a wireless transmitter which transmits the signal. Receiver module has a wireless receiver and microcontroller which receives the data serially and displays it on an LCD screen.
This paper proposes the use of Linux OS for real-time applications with the aid of Sitara ARM processor, AM335x. The Sitara AM335x SoC is equipped with two 32-bit low-latency microcontrollers called Programmable Real-time Units (PRUs), forming Programmable Real-time Unit Subsystem (PRUSS). PRUs can be individually programmed to do a specific task independent of the arm processor. This provides many advantages like fast operation with near to real-time processing speed and offload of deterministic and timecritical tasks from the ARM core.
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