LCD implementation of our project.
Dependencies: mbed mbed-rtos MLX90614
Compass.cpp
- Committer:
- ovidiup13
- Date:
- 2015-05-28
- Revision:
- 5:5b1a8ad6c187
- Parent:
- 4:024e6a9c2ebf
- Child:
- 7:11675c1dce4f
File content as of revision 5:5b1a8ad6c187:
#include "Compass.h" //constructor Compass::Compass(ST7565 * lcd, Item * back) { this->title = " Compass"; this->st7565= lcd; this->back = back; ct = NULL; } //display function, starts the thread and displays the compass void Compass::display(void) { //create a new thread to get and update compass - do later if(ct != NULL) return; //thread is already running ct = new Thread(&Compass::ct_start, this); ct->signal_set(START_THREAD); } //trigger for starting the thread void Compass::ct_start(void const *args) { Compass *c = (Compass*)args; c->compass_update(); } //function that the thread runs, waits for the signal before starting void Compass::compass_update() { ct->signal_wait(START_THREAD); int i = 0; //get degrees from other functions and display the compass while(true) { draw_compass(i++); Thread::wait(30); st7565->clear(); } } //update function handles updates from the user - cancels the thread //and returns to main menu void Compass::update(char c) { //kill thread and go back if(c == 'y') { ct->terminate(); free(ct); ct = NULL; st7565->clear();//clear everything this->setSelectedScreen(back); } else return; } //get direction char * get_direction(double degrees) { if(degrees >= 330 || degrees < 30) return "East"; else if(degrees >= 30 && degrees <= 60) return "North-East"; else if(degrees >= 60 && degrees < 120) return "North"; else if(degrees >= 120 && degrees < 150) return "North-West"; else if(degrees >= 150 && degrees < 210) return "West"; else if(degrees >= 210 && degrees < 240) return "South-West"; else if(degrees >= 240 && degrees < 300) return "South"; else return "South-East"; } //function that draws the compass on the screen void Compass::draw_compass(double degrees) { //variables int x_temp, y_temp; double rad = degrees * M_PI / 180; //radians //calculate coordinates to point x_temp = X_CENTER + (int) (POINTER_LENGTH * cos(rad)); y_temp = Y_CENTER + (int) (POINTER_LENGTH * (-sin(rad))); //draw the main circle and small one st7565->drawcircle(X_CENTER, Y_CENTER, RADIUS, 20); st7565->drawcircle(X_CENTER, Y_CENTER, 2, 20); //draw the lines st7565->drawline(X_CENTER, Y_CENTER, x_temp, y_temp, 20); //draw line from center to coordinates st7565->drawline(X_CENTER, Y_CENTER - RADIUS, X_CENTER, Y_CENTER - 15, 20); //north line st7565->drawline(X_CENTER, Y_CENTER + RADIUS, X_CENTER, Y_CENTER + 15, 20); //south line st7565->drawline(X_CENTER + RADIUS, Y_CENTER, X_CENTER + 15, Y_CENTER, 20); //east line st7565->drawline(X_CENTER - RADIUS, Y_CENTER, X_CENTER - 15, Y_CENTER, 20); //west line //draw the initials st7565->drawstring(X_CENTER - 2, 1, "N"); st7565->drawstring(X_CENTER - 2, 7, "S"); st7565->drawstring(X_CENTER + 21, 4, "E"); st7565->drawstring(X_CENTER - 25, 4, "W"); //display pointing direction st7565->drawstring(0, 2, "Pointing:"); char * pointer = get_direction(degrees); st7565->drawstring(0, 4, pointer); //display degrees and radians in bottom left corner char s_deg[10], s_rad[10]; sprintf(s_deg, "DEG:%g", degrees); sprintf(s_rad, "RAD:%.2g", rad); st7565->drawstring(1, 6, s_deg); st7565->drawstring(1, 7, s_rad); st7565->display(); }