MCU MCU MCU Method and apparatus for switching between master MCUmicro controller unit and slave MCU of dual MCU

摘要

A method and an apparatus for switching a master MCU and a slave MCU in a dual MCU are disclosed. A method for handshaking a dual MCU including a master MCU and a slave MCU includes the steps of setting a first GPIO output of a first MCU set to a master MCU to a high state and a step of synchronizing a first MCU with a second MCU set to a slave MCU Setting a second GPIO output channel of the second MCU to a high state, detecting a rising edge due to a high state of the second GPIO output channel of the first MCU and detecting a rising edge of the second GPIO output channel of the second MCU between the first MCU and the second MCU Performing SPI communication, setting the second GPIO output channel of the second MCU to a low state after completion of the SPI communication, setting the first GPIO output of the first MCU to a low state, Handshaking can be performed when no switch is made between the master MCU and the slave MCU.