Papers by Author: Shao Zhi Bu

Abstract: The form and function of the handheld devices is variety. Each product will need to develop a new re-development, even if the feature is very close. We propose a scalable handheld devices design scheme based on PXA322 embedded processor, describe the handheld devices’ each hardware circuit interface module in detail, include: the handheld devices’ basic system module formed by the CPU(PXA322), SDRAM and FLASH; the communication system interface module formed by DM9000 etc; human-computer interaction interface module; power management module etc, and we also complete the corresponding operating system migration and the system’s functional integrity testing work on the hardware system. The board has a high versatility, the cutting of its hardware and software is flexible, it also increases the development efficiency of the handheld devices.

Abstract: We introduce the high smart pressure sensor’s hardware-circuit design based on Ultra-Low Power MSP430 MCU, the BP network algorithm in temperature compensation because of the pressure sensor’s temperature drift is analyzed, and the collected values of MPM280’s temperature and pressure signals with MCU are used in 4-layer BP network for offline training. We express the suited network module by C language program, and analyze the software-implemented method. The result shows that the MSP430 MCU can reduce system power and its rich exterior equipments can reduce the size of pressure sensor, the training of BP network by use of digital A/D value of MCU conversion reduces the error, the pressure sensor’s precision is improved by BP network, the precision is 0.1%.