The Professional Perfectionists / Mbed 2 deprecated Test_FXOS8700CQ

Test for On-Board accelerometer and magnetometer

Dependencies:   FXOS8700CQ mbed

main.cpp@0:50827c2b52fb, 2015-03-31 (annotated)

Committer:
joshwilkins2013
Date:
Tue Mar 31 22:37:21 2015 +0000
Revision:
0:50827c2b52fb

        

        
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#include "mbed.h"





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#include "FXOS8700CQ.h"





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Serial pc(USBTX, USBRX); // Primary output to demonstrate library





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FXOS8700CQ fxos(PTE25, PTE24, FXOS8700CQ_SLAVE_ADDR1); // SDA, SCL, (addr << 1)





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DigitalOut green(LED_GREEN); // waiting light





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DigitalOut blue(LED_BLUE); // collection-in-progress light





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DigitalOut red(LED_RED); // completed/error ligt





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Timer t; // Microsecond timer, 32 bit int, maximum count of ~30 minutes





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InterruptIn fxos_int2(PTC13); // should just be the Data-Ready interrupt





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bool fxos_int2_triggered = false; // Interrupt status flags and data





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SRAWDATA accel_data; // Storage for the data from the sensor





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SRAWDATA magn_data;





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void trigger_fxos_int2(void){





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    fxos_int2_triggered = true;





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}





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void print_reading(){





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    pc.printf("A X:%5d,Y:%5d,Z:%5d   M X:%5d,Y:%5d,Z:%5d\r\n",





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              accel_data.x, accel_data.y, accel_data.z,





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              magn_data.x, magn_data.y, magn_data.z);





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}





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int main(void){





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    t.reset();





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    pc.baud(115200); // 200Hz x line of output data!





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    green.write(1);





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    red.write(1);





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    blue.write(1);





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    printf("\r\n\nFXOS8700Q Who Am I= %X\r\n", fxos.get_whoami());





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    fxos_int2.fall(&trigger_fxos_int2); // Iterrupt for active-low interrupt line from FXOS





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    fxos.enable();





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    green.write(0); // ready-green on





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    // Example data printing





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    fxos.get_data(&accel_data, &magn_data);





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    print_reading();





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    pc.printf("Started data collection. Accelerometer at max %dg.\r\n",





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    fxos.get_accel_scale());





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    fxos.get_data(&accel_data, &magn_data); // clear interrupt from device





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    fxos_int2_triggered = false; // un-trigger





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    t.start(); // start timer and enter collection loop





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    while(1){





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       if(fxos_int2_triggered) {





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           fxos_int2_triggered = false; // un-trigger





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           fxos.get_data(&accel_data, &magn_data);





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           print_reading(); // outpouring of data !!





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        }





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        // Continuous polling of interrupt status is not efficient, but...





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        wait_us(500); // 1/10th the period of the 200Hz sample rate





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    }





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}