NeerajRathi IUPUI/ECE
/
wireless_project_BLE
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Dependencies: FXOS8700Q HCSR-04 Servo mbed
Revision 0:2f02c1515311, committed 2016-12-02
- Comitter:
- nrrathi
- Date:
- Fri Dec 02 20:34:22 2016 +0000
- Commit message:
- An embedded system that assists a cyclist on traffic conditions, positioning capabilities and wirelessly send traffic signals using LEDs. The system detects the distance of the bike from the traffic behind.
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FXOS8700Q.lib Fri Dec 02 20:34:22 2016 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/teams/Freescale/code/FXOS8700Q/#834488c11340
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/HCSR04.lib Fri Dec 02 20:34:22 2016 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/goeltanu/code/HCSR-04/#45864bd4599b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Servo.lib Fri Dec 02 20:34:22 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/Servo/#36b69a7ced07
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Dec 02 20:34:22 2016 +0000
@@ -0,0 +1,100 @@
+#include "mbed.h"
+#include "hcsr04.h"
+#include "Servo.h"
+#include "FXOS8700Q.h"
+#include "math.h"
+#define M_PI 3.1415926535
+
+Serial pc(USBTX, USBRX);
+Serial device (PTC15,PTC14);
+HCSR04 usensor(A4,A5);
+I2C i2c(PTE25, PTE24);
+FXOS8700QAccelerometer acc(i2c, FXOS8700CQ_SLAVE_ADDR1);
+DigitalOut RED (LED1);
+DigitalOut GREEN (LED2);
+DigitalOut BLUE (LED3);
+int distance; //Variable to store distance from an object
+int state = 0;
+double pitch, roll;
+const float alpha = 0.5;
+double fxg = 0;
+double fyg = 0;
+double fzg = 0;
+motion_data_counts_t acc_raw;
+
+void filter_accelerometer()
+{
+ double xg, yg, zg;
+
+ acc.getAxis(acc_raw);
+
+ xg = acc_raw.x;
+ yg = acc_raw.y;
+ zg = acc_raw.z;
+
+ // low pass filter
+ fxg = xg * alpha + (fxg * (1.0 - alpha));
+ fyg = yg * alpha + (fyg * (1.0 - alpha));
+ fzg = zg * alpha + (fzg * (1.0 - alpha));
+
+ // pitch and roll calculations
+ roll = (atan2(-fyg, fzg)*180.0)/M_PI;
+ pitch = (atan2(fxg, sqrt(fyg*fyg + fzg*fzg))*180.0)/M_PI;
+ printf(" %0.2f %0.2f \r\n", roll, pitch);
+ }
+
+int main()
+{
+acc.enable();
+ GREEN = 1;
+ BLUE = 1;
+ RED = 1;
+ while(1)
+ {
+ usensor.start();
+ wait_ms(0.0025);
+ distance = usensor.get_dist_cm();
+ wait(0.5);
+ pc.printf(" distance = %d\r\n", distance);
+ if(distance <= 9 )
+ {
+ device.printf("ALERT VEHICLE");
+ }
+ filter_accelerometer();
+ if (roll > 22.00 && pitch > 3.00 )
+ {
+ GREEN = BLUE = 1;
+ RED = 0;
+
+ wait(0.5);
+ RED = 1;
+ }
+ if(device.readable() > 0)
+ {
+ state = device.getc();
+ pc.printf("Instruction: %i\n\r", state);
+ }
+ if (state == '1')
+ {
+ RED = BLUE = 1;
+ GREEN = 0;
+ wait(0.3);
+ GREEN = 1;
+ wait(0.3);
+ }
+ else if (state == '2')
+ {
+ RED = GREEN = 1;
+ BLUE = 0;
+ wait(0.3);
+ BLUE = 1;
+ wait (0.3);
+ }
+ else if (state == '3') {
+ RED = GREEN = 1;
+ BLUE = 1;
+
+ }
+
+ }
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Dec 02 20:34:22 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/0ab6a29f35bf \ No newline at end of file