Paper counting display device based on STM32F103 single chip computer

Abstract

This system uses the STM32F103 single-chip microcomputer as the control center, and the capacitance-to-digital converter FDC2214 collects the current paper value, performs data collection and transmits it to the main control single-chip microcomputer. Methods: Calculate accurate data through Kalman filtering, and accurately calculate and display the number of measured paper sheets on this basis. The device also sets a buzzer to accurately short circuit alarm. The circuit structure of the entire system is simple, and the reliability is high. Results: The system has high precision and fast speed, and can complete the basic requirements and expansion requirements of the problem. Although it is limited by time and venue, it can also have a high reference value for the design of practical applications such as detecting the number of banknotes. Conclusions: Experimental test results show that this design can complete the basic indicators required by the topic and play part of the content. This paper focuses on the hardware design, software design and test result analysis of the system.

The design of paper counting device based on STM32

“…(3)The unified function design adopts the idea of modular design. In this design, The author used the I / O port in STM32F103 to control the button and buzzer module, and also realized the IIC protocol communication with OLED and FDC2214 through the specific pin multiplexing function, and we also want to define the corresponding function module, initialize the corresponding pin and apply the special function of the module to complete the required operation [5] . For example, STM32F103 is connected to the SCK and SDA pins of OLED display through PB8 and PB9.…”