Digital Recording Computer System with the Function of Recording Measurement Data to SDHC Memory Card

Purpose of research. The main idea of the article is to develop a digital device created on domestic components and designed to record measurement information with the function of recording on a memory card and transferring it to a personal computer using a USB-interface. The article also considers the tasks to be solved.Methods. Having analyzed possible alternative variants of development of the registering computer system, the authors offer a variant of its realization on the microcontroller, in the software of which it is necessary to provide the following functions: realization of information exchange via RS-485 interface; realization of exchange via USB 2.0 interface for transfer of the accumulated registered information to the computer; realization of recording, reading and erasing of the registered information on the flash-drive; realization of the counter of its own time with uninterrupted work at the time of the registration of the information on the microcontroller.Results. This paper develops a digital device designed for digital registration with the function of recording measurement information on an SDHC memory card. The operation of the device consists in providing registration of information with saving it in the form of files on a memory card of SDHC format. Access to the registered information is made from a computer via USB 2.0 interface in the memory device mode by means of a software driver realized in the microcontroller 1986BE92T of the Milandr company. Initialization of the device is carried out with the help of a computer, through the driver implementing hardware bridge USB-UART on the standard USB 2.0.Conclusion. The obtained results satisfy the set goal and objectives. A textual description of the microcontroller firmware in C language is developed. In addition, the paper develops application software designed to obtain measurement results and send control commands to the microcontroller. The field of application of the proposed device is specialized computing systems designed for digital recording of information.