Diff: main.cpp

Revision:

0:e1ce6b0a884d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Feb 09 13:03:22 2019 +0000
@@ -0,0 +1,124 @@
+#include "mbed.h"
+#include "TextLCD.h"
+//slave
+
+AnalogIn pot(PTB1);  // postavi pin
+InterruptIn button(PTD4);
+DigitalOut mod1(PTD0);
+DigitalOut mod2(PTD2);
+DigitalOut mod3(PTD3);
+Timer debounce;
+I2CSlave i2c_slave(PTC11, PTC10); //sda, scl
+TextLCD lcd(PTB8,PTB9,PTB10,PTB11,PTE2,PTE3,TextLCD::LCD16x2); // LCD
+Serial pc(USBTX,USBRX);
+
+float temp;
+float temp_k;
+float temp_f;
+int rec;
+char podaci[2];
+char temp_read[2];
+const int addr_slave = 0x80;
+int state = 0;
+int old = 0;
+//int buttonPoll = 0;
+
+float pretvori_temp(){
+    temp = 0.0625 * (((temp_read[0] << 8) + temp_read[1]) >> 4); //konverzija u float vrijednost deg C
+    return temp;
+    }
+    
+void isr1(){
+  if (debounce.read_ms() > 200) {
+    state = old + 1;
+    old = state;
+    debounce.reset();
+    }
+}
+
+
+int main(){
+    mod1 = 1;
+    mod2 = 0;
+    mod3 = 0;
+    
+    lcd.cls();
+    wait(0.01);
+    i2c_slave.frequency(100000);
+    i2c_slave.address(addr_slave<<1);
+    
+    debounce.start();
+    button.rise(&isr1);
+    
+    while(1){
+        float Ain = pot.read();
+        float temp_ref = 17.0 + ((float)Ain*10.0); // 17 - 27 C T_ref
+        short temp_ref_100 = temp_ref*100;
+        
+        rec = i2c_slave.receive();
+        
+        switch(rec){
+            case 0: break;
+            case 1:
+            wait_us(50); //clock-stretching
+            podaci[0] = temp_ref_100>>8; //MSB
+            podaci[1] = temp_ref_100; //LSB
+            i2c_slave.write(podaci,2);
+            break;
+            case 2:
+            case 3:
+            i2c_slave.read(temp_read,2);
+            pretvori_temp();
+            temp_k= temp + 273.15; // T(K) = t(C);
+            temp_f= (temp*1.8)+32; //(0°C × 9/5) + 32 = 32°F
+            lcd.cls();
+            wait(0.01);
+            switch(state){
+                case 1: //celsius
+                mod1 = 1;
+                mod2 = 0;
+                mod3 = 0;
+                lcd.printf("Mod 1 - Celsius\nT = %.2f C", temp);
+                //pc.printf("Primljena temp: %2f C\n\r", temp);
+                wait(0.5);
+                break;
+                case 2: //kelvin
+                mod1 = 0;
+                mod2 = 1;
+                mod3 = 0;
+                lcd.printf("Mod 2 - Kelvin\nT = %.2f K", temp_k); 
+                //pc.printf("Primljena temp: %2f K\n\r", temp_k);
+                wait(0.5);
+                break;
+                case 3: //fahrenheit
+                mod1 = 0;
+                mod2 = 0;
+                mod3 = 1;
+                lcd.printf("Mod 3 - Fahr\nT = %.2f F", temp_f); 
+                //pc.printf("Primljena temp: %2f F\n\r", temp_f);
+                wait(0.5);
+                break;
+                case 4:
+                mod1 = 0;
+                mod2 = 0;
+                mod3 = 0;
+                lcd.printf("Temp ref:\nT = %.2f C", temp_ref);
+                //pc.printf("Poslana temp_ref: %2f C\n\r", temp_f);
+                wait(0.5);
+                break;
+                default: //celsius
+                old = 1;
+                mod1 = 1;
+                mod2 = 0;
+                mod3 = 0;
+                lcd.printf("Mod 1 - Celsius\nT = %.2f C", temp);
+                //pc.printf("Primljena temp: %2f C\n\r", temp);
+                wait(0.5);
+                break;
+                }
+            break;
+            default:break;
+            }
+            
+        }
+    }
\ No newline at end of file