ARINC429 bus control circuit based on dual redundancy

The invention relates to an ARINC429 bus control circuit based on dual redundancy. The circuit comprises a main/standby CPM module, an ARINC429 communication circuit, an ARINC429 control signal isolation switching circuit and bus main/standby switching signal logic; the main/standby CPM module realizes a control function and a main/standby switching function of an ARINC429 bus; the ARINC429 communication circuit is used for realizing a bus communication function; the ARINC429 control signal isolation switching circuit isolates the main/standby CPM module from the ARINC429 communication circuit; a bus main/standby switching signal logic circuit enables a main/standby channel in the ARINC429 control signal isolation switching circuit, so that dual-redundancy ARINC429 bus control is realized. The ARINC429 bus control circuit has an ARINC429 bus control signal isolation function, so that a high-speed isolation chip does not influence SPI and other signals; and the ARINC429 bus control circuit has an enabling func