For the positioning and navigation application of electronic compass

a digital magnetic compass based on FPGA micro controller is developed

which has the advantages of low cost

high speed

low power consumption. FPGA is responsible for the processing work

data acquisition

azimuth calculation

LED display and serial output of the digital magnetoresistive sensor and digital accelerometer.After analyzing the compass error sources

compensation is emphasized on the hard interference error.In order to verify the design effect

the magnetic digital compass material is tested

the test results show that the magnetic compass precision is in the range of 1°～ 2° after error compensation

which can work stablely for a long time and can be used for general navigation area.