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CCS: HC-SR04 sensor with speed test

Other Parts Discussed in Thread: MSP430G2553

Tool/software: Code Composer Studio

I use msp430g2553.I use code composer studio 9.2.0. I want to write a code which is determine the speed of object.We know the distance of road and we want to get time with 2 sensor(HC-SR04) by using timer and interrupt.One sensor will be beginnig of the road and second one will be end of the road.İ wanna know time between two sensors.i wanna desing a circuit that calculate speed of object that passes between 2 points.İ wanna use 2 HC-SR04 sensor.How can i write the code?İ need help.

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