Ryosuke Yumoto
this system is speed sensor for the human powered airplane by the pitot tube. the pitot tube is used the differential pressure senser SDP-1000.
Dependencies: SDFileSystem mbed
Revision 0:94c1e7624b95, committed 2015-10-13
- Comitter:
- onseeen
- Date:
- Tue Oct 13 11:38:55 2015 +0000
- Commit message:
- the pitot tube is air speed sensor for the human powered airplane. this system is used the SDP-1000.
Changed in this revision
diff -r 000000000000 -r 94c1e7624b95 SDFileSystem.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SDFileSystem.lib Tue Oct 13 11:38:55 2015 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/mbed_official/code/SDFileSystem/#7b35d1709458
diff -r 000000000000 -r 94c1e7624b95 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Oct 13 11:38:55 2015 +0000
@@ -0,0 +1,71 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+
+
+SDFileSystem sd(p5, p6, p7, p8, "sd");
+AnalogIn pitot(p18);
+
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+DigitalOut led3(LED3);
+DigitalOut led4(LED4);
+DigitalIn logging(p19);
+DigitalOut stop_counter(p20);
+PwmOut servo(p21);
+Timer t;
+
+float pout;
+double time_pulse, length, pres, vel;
+float sp_of_s;
+float temp = 0;
+
+
+int main() {
+ led1 = 0.0;
+ led2 = 0.0;
+ led3 = 0.0;
+ led4 = 0.0;
+ wait(0.5);
+
+ while(logging < 0.5) {
+ led1 = 1;
+ led4 = 1;
+ wait(0.5);
+ led1 = 0;
+ led4 = 0;
+ wait(0.5);
+ }
+
+ wait(3);
+ //setup log file
+ FILE *fp = fopen("/sd/TFLOG.csv", "w");
+ if(fp == NULL) {
+ error("Could not open file for write\n\r");
+ }
+
+ fprintf(fp, "altitude, velocity\n");
+ stop_counter = 0;
+ led1 = 1;
+ led4 = 1;
+
+ while(logging < 0.5){
+ //get velocity
+ pres = 500 * (pitot.read()*5-0.25)/3.75*0.95-15.5;
+
+ if(pres > 0){
+ vel=sqrt(2.0/1.225*pres);
+ }
+ else{
+ vel=-sqrt(2.0/1.225*pres*(-1.0));
+ }
+
+ fprintf(fp,"%6.4f\n ", vel);
+ //servo.pulsewidth(pout);
+ //wait(0.04888-time_pulse/1000000);
+ wait(0.01);
+ }
+ stop_counter = 1;
+ fclose(fp);
+ led1 = 0;
+ led4 = 0;
+}
diff -r 000000000000 -r 94c1e7624b95 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Oct 13 11:38:55 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/4f6c30876dfa \ No newline at end of file