Diff: main.cpp

Revision:

0:50827c2b52fb

diff -r 000000000000 -r 50827c2b52fb main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Mar 31 22:37:21 2015 +0000
@@ -0,0 +1,65 @@
+#include "mbed.h"
+#include "FXOS8700CQ.h"
+ 
+Serial pc(USBTX, USBRX); // Primary output to demonstrate library
+ 
+FXOS8700CQ fxos(PTE25, PTE24, FXOS8700CQ_SLAVE_ADDR1); // SDA, SCL, (addr << 1)
+ 
+DigitalOut green(LED_GREEN); // waiting light
+DigitalOut blue(LED_BLUE); // collection-in-progress light
+DigitalOut red(LED_RED); // completed/error ligt
+ 
+Timer t; // Microsecond timer, 32 bit int, maximum count of ~30 minutes
+InterruptIn fxos_int2(PTC13); // should just be the Data-Ready interrupt
+bool fxos_int2_triggered = false; // Interrupt status flags and data
+ 
+SRAWDATA accel_data; // Storage for the data from the sensor
+SRAWDATA magn_data;
+ 
+void trigger_fxos_int2(void){
+    fxos_int2_triggered = true;
+}
+ 
+void print_reading(){
+    pc.printf("A X:%5d,Y:%5d,Z:%5d   M X:%5d,Y:%5d,Z:%5d\r\n",
+              accel_data.x, accel_data.y, accel_data.z,
+              magn_data.x, magn_data.y, magn_data.z);
+}
+ 
+int main(void){
+    t.reset();
+    pc.baud(115200); // 200Hz x line of output data!
+    
+    green.write(1);
+    red.write(1);
+    blue.write(1);
+ 
+    printf("\r\n\nFXOS8700Q Who Am I= %X\r\n", fxos.get_whoami());
+     
+    fxos_int2.fall(&trigger_fxos_int2); // Iterrupt for active-low interrupt line from FXOS
+    fxos.enable();
+ 
+    green.write(0); // ready-green on
+ 
+    // Example data printing
+    fxos.get_data(&accel_data, &magn_data);
+    print_reading();
+ 
+    pc.printf("Started data collection. Accelerometer at max %dg.\r\n",
+    fxos.get_accel_scale());
+ 
+    fxos.get_data(&accel_data, &magn_data); // clear interrupt from device
+    fxos_int2_triggered = false; // un-trigger
+ 
+    t.start(); // start timer and enter collection loop
+    while(1){
+       if(fxos_int2_triggered) {
+           fxos_int2_triggered = false; // un-trigger
+           fxos.get_data(&accel_data, &magn_data);
+           print_reading(); // outpouring of data !!
+        }
+ 
+        // Continuous polling of interrupt status is not efficient, but...
+        wait_us(500); // 1/10th the period of the 200Hz sample rate
+    }
+}
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