Diff: main.cpp

Revision:

0:6d566e6d9aa7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Nov 17 15:26:43 2020 +0000
@@ -0,0 +1,165 @@
+#include "mbed.h"
+
+#include "C12832.h" //LCD display library
+
+Serial pc(USBTX,USBRX); //serial port to communicate with pc
+//PwmOut PWM1(p21); //used for the pwm setup
+//PwmOut led (LED1);
+
+//task5 testing and orages song
+DigitalIn fire(p14);
+PwmOut spkr(p26); //pwm directed to pin26 speaker
+
+
+//extra song, Star WARS
+float frequency [] = {175,175,175,233,349,311,294,523,932,698,622,587,523,932,698,622,587,622,523};
+float beat [] = {21,21,21,128,64,21,21,21,128,64,21,21,21,128,64,21,21,21,128};
+int length = sizeof(beat)/sizeof(beat[0]); //to get the length of the array //not use it in a main()
+
+//oranges and lemons song
+//float frequency [] = {659, 554, 659, 554, 550, 494, 554, 587, 494, 659, 554, 440}; //frequency array
+//float beat[] = {1, 1, 1, 1, 1, 0.5, 0.5, 1, 1, 1, 1, 2}; //beat array
+
+C12832 lcd(p5, p7, p6, p8, p11); //define lcd pins
+
+char getChar();
+float getFloat();
+//void basicPWM();
+//void ledPwm(float);
+
+
+int main()
+{
+    //Task2.1
+    //pc.printf("Workshop 6\n\r"); //the \n\r gives new line and cariage return carriage return
+    
+    //Task2.2
+    /*char c; //this holds the data pc sends
+    while(1)
+    {
+        c = pc.getc(); //gets character from input stream
+        lcd.cls();
+        lcd.locate(10,10);
+        lcd.printf("%c", c); //display the character
+    }*/
+    
+    //Task2.3
+    /*while(1)
+    {
+        float num = getFloat(); //read the formated data as printf prints it
+        lcd.cls();
+        lcd.locate(10,10);
+        lcd.printf("%4.3f",num); //4.3 decimal accuracy
+    }*/
+    //basicPWM();
+    
+    //Task4
+    /*float brightness = 0.0;
+    char c;
+    
+    while(1)
+    {
+        pc.printf("Control of LED dimmer by host terminal \n\r");
+        pc.printf("Press 'u'= brighter, 'd'=dimmer\n\r");
+        pc.printf("%c %1.3f \n \r", c, brightness);
+        
+        c = pc.getc();
+
+        if(brightness > 0.2) //set 0.2 upper limit
+        {
+            brightness = 0.2;
+        }
+        else if(brightness < 0.0) //set 0.0 lower limit
+        {
+            brightness = 0.0;
+        }
+        else
+        {
+            if(c == 'u')
+            {
+                brightness = brightness + 0.0001; //brightness increase
+            }
+            if(c == 'd')
+            {
+                brightness = brightness - 0.0001; //brightness decrease
+            }
+        }
+        
+        ledPwm(brightness);
+        
+        
+    }*/
+    
+    //Task 5, speaker test
+    /*while(1)
+    {
+        for(float i= 2000.0; i<10000.0; i+=100)
+        {
+            spkr.period(1.0/i); //frequency sweep from 2Khz to 10KHz, period=1/f 
+            spkr = 0.5; //50% duty cycle
+            wait(0.1);
+        }
+        
+        spkr = 0.0; //nute speaker
+        while(!fire){}
+    }*/
+    
+    //task5, speaker orange song
+    /*while(1)
+    {
+        for(int i=0; i<= 11; i++)
+        {
+            spkr.period(1.0/frequency[i]); //variable frequency dewpending on song notes
+            spkr = 0.5; //50% duty cycle
+            wait(0.5*beat[i]); //hold for beat period
+        }
+        
+        spkr = 0.0; //mute speaker
+        while(!fire){}
+    }*/
+    
+    
+    while(1)
+    {
+        for(int i=0; i<length; i++)
+        {
+            spkr.period(1.0/frequency[i]); //convert frequency to time and use it as period
+            spkr = 0.5; //50% duty cycle
+            wait(0.5*beat[i]*0.02); //0.02 is used to adjust the speed of the music
+        }
+        
+        spkr = 0.0; //mute the speaker
+        while(!fire){}
+    }
+    
+    //return 0;
+    
+    
+}
+
+/*void ledPwm(float brightness) //for the led online adjusting
+{
+    led.period(0.001); //100Hz=T
+    led = brightness;
+}*/
+
+/*void basicPWM() //for the PWM online adjusting 
+{
+    //create a PWM signal to see on the osciloscope (Pulse = 100Hz and DT= 50%
+    PWM1.period(getFloat()); //set the PWM period to 10ms, used to configure period remotel as well
+    PWM1 = getFloat(); //set the duty cycle to 50% (from 0.0 to 1.0 0% to 100%)
+}*/
+
+float getFloat()
+{
+    float num;
+    pc.scanf("%f", &num);
+    return (num);
+}
+
+char getChar()
+{
+    char c;
+    pc.getc();
+    return c;
+}