Control method and device based on MCU (Microprogrammed Control Unit) serial port communication

Abstract

The invention discloses a control method and device based on MCU (Microprogrammed Control Unit) serial port communication. The method comprises the following steps: configuring a first timing period of a first timing device of an MUC-A; when the first timing period of the first timing device exceeds the time limit, pulling up a GPIO-A of the MUC-A to send a first external part interrupt signal toan MUC-B; starting a second timing period of the first timing device; judging whether the MUC-A receives a second external part interrupt signal which is sent by pulling up a GPIO-B via the MUC-B or not within the second timing period; if the MUC-A receives the second external part interrupt signal, switching off a serial port power supply of the MUC-A; if the MUC-A does not receive the second external part interrupt signal, switching off the serial port power supply of the MUC-A after the second timing period exceeds the time limit. According to the control method based on the MCU serial portcommunication, disclosed by the invention, a data receiving / transmitting request can be rapidly responded; when no data exchange exists, serial ports of double parties are switched off, so that the power consumption of a system can be effectively reduced and the cruising duration of the system is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a control method and device based on MCU serial port communication. Background technique [0002] In current wearable devices, many of them use two chips to process different logics respectively. For example, one chip is responsible for peripheral data acquisition, and the other is responsible for user logic and data display. When one of the chips collects enough data, it must be transmitted to another chip for storage and display. [0003] Since the two chips need to transmit data to each other at any time, it is obviously unreasonable to use interfaces such as I2C and SPI, and the memory cannot be shared between the two chips, so the hardware design can meet the communication requirements between the two chips. The only way is the serial port. [0004] For general design, it is often to keep the serial port between the two chips in the power-on and normally open state, so th...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a control method and device based on MCU serial port communication, aiming to solve the problems of slow communication data transmission and large system consumption

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