sonar sensor is working in the version of code but the reading are not correct
Dependencies: C12832 Pulse RangeFinder Servo mbed rtos
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Diff: main.cpp.orig
- Revision:
- 23:f098ffcd192a
- Parent:
- 22:5f6df7ae19a3
- Parent:
- 18:974430ee2fbb
- Child:
- 24:00a577f64930
--- a/main.cpp.orig Thu Apr 23 10:40:09 2015 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,131 +0,0 @@ -#include "mbed.h" -#include "rtos.h" -#include "Servo.h" -#include "C12832.h" -#include "RangeFinder.h"// header files for sonar sensor - - -Servo tiltServo(p24); -Servo panServo(p25); -Serial pc(USBTX, USBRX); -Servo vertServo(p23); - -Mutex mutexIn;// protect globel variables -Mutex mutexOut;// protect globel variables -Mutex mutex_sonar; -AnalogIn sonar(p19); // temporary changed to potmeter -Mutex mutexIn; -Mutex mutexOut; - -// Global variables -float corHoriz = 0; // horizontal variable arrives from OpenCV -float corVert = 0; // vertical variable arrives from OpenCV -float distance = 0;// variable holds the distance in meters 0 to 3.3 -float norm=0; // variable holds the normalised values form the sonar sensor -float outVert; // output to vertical servo -float outTilt; // output to tilt servo -float outHoriz; // output to horizontal servo -C12832 lcd(p5, p7, p6, p8, p11);// lcd is an object from class c12832 initialised by p5,p7.... -float differ; // temporary global. Can be local. - - -/*parallax ultrasound range finder -p21 pin the range finder is connected to. -10 is Time of pulse to send to the rangefinder to trigger a measurement, in microseconds. -5800 is Scaling of the range finder's output pulse from microseconds to metres. -100000 Time to wait for a pulse from the range finder before giving up -*/ - -RangeFinder rf(p26, 10, 5800.0, 100000); -/* Thread Serial 1 - handles the output data from the control thread, and pass to the servo. - @update s1, s2 */ -void serial_thread(void const *args) -{ - while (true) { - pc.scanf("%f,%f", &corHoriz, &corVert);// read from serial port the data - } -} - -/* Thread LCD 2 - handles the input data from the sonar sensor, and display on the LCD screen. - @update inData */ -void lcd_thread(void const *args) -{ - while (true) { - mutex_sonar.lock(); - // Display values on the LCD screen - lcd.cls(); // clear the display - lcd.locate(0,5); // the location where you want your charater to be displayed - - lcd.printf("differ: %0.3f, OutTilt: %0.3f", differ, outTilt); - lcd.locate(0,20); // the location where you want your charater to be displayed - lcd.printf("Vert: %0.3f, OutVert: %0.3f", corVert, outVert); - Thread::wait(250); - } -} - -/* Thread Control 3 - handles the input data from the sonar sensor, and display on the LCD screen. - @update inData */ -void control_thread(void const *args) -{ - while (true) { - mutexIn.lock(); - //float differ; - differ = exp(corVert + sonar * (outTilt / 20)) / (1 + exp(corVert + sonar * (outTilt / 20))); - if (corVert > 0.1 && corVert < 0.9) { // if corVert is valid (between 0 - 1) then do movements - // moves lamp down by the fraction of the difference from the middle - outVert = corVert * (1 - differ); - // tilt down by the fraction of the difference from the middle - outTilt = corVert * differ; /* - } else if (0 < corVert < 0.3) { - outVert = 0; - outTilt = corVert * .9; // Follow the low movement only with the tilt servo. - // (.9 is the correction of the side of the screen at OpenCV) - } else if (corVert > 0.7 && corVert < 1) { - outVert = 1; - outTilt = corVert * 1.1; */ - } else { // Else this is the case when there is no input from the OpenCV - outVert = .5; - outTilt = corVert * differ; - // TODO Pan search code here. (Searching personality.) - } - mutexIn.unlock(); - Thread::wait(250); - } -} - -/* Thread Servo 4 - handles the output data from the control thread, and pass to the servo. - @update s1, s2 */ -void servo_thread(void const *args) -{ - while (true) { - mutexOut.lock(); - tiltServo = outTilt; - panServo = outHoriz; - vertServo = outVert; - mutexOut.unlock(); - Thread::wait(250); - } -} - -/* Thread sonar 5 - handles the sonar values which can be in meter or normailsed value to one */ -void sonar_thread(void const *args) { - while (true) { - mutex_sonar.lock(); - distance = rf.read_m(); // read the distance from the sonar sensor in meter - norm= distance/3.3; // normalised value from the sonar sensor - printf("dis: %0.2f", distance);// Display the distance in meters from the sonar - mutex_sonar.unlock(); - Thread::wait(250); - } -} - -int main() { - Thread thread_1(serial_thread); // Start Serial Thread - Thread thread_2(lcd_thread); // Start LCD Thread - Thread thread_3(control_thread); // Start Servo Thread - Thread thread_4(servo_thread); // Start Servo Thread - Thread thread_5(sonar_thread); // Start Servo Thread - while(1) { - wait(1); - } -}