Andrew Klimenyuk / Mbed 2 deprecated STM32F103C8T6_WIFI_Heating_system

STM32F103C8T6_WIFI_Heating_system

Dependencies:   mbed mbed-STM32F103C8T6 eeprom_flash Watchdog PinDetect DS1820

  1. Bluepill STM32F103C8T6 Heating system
    1. _This project is core part of bigger heating system project!_

Features - Reading temperature from four DS18B20 sensors - Making a decision about switching on/off heater and pomp - Executing simple user commands from UART - Storing state parameters to program memory (EEPROM emulation)

Diff: main.cpp

Revision:
17:718e41e971f8
Parent:
16:c7b77648311d
Child:
18:9434e06223c7
--- a/main.cpp	Tue Sep 11 20:44:26 2018 +0000
+++ b/main.cpp	Wed Sep 12 16:51:13 2018 +0000
@@ -1,12 +1,13 @@
 #include "stm32f103c8t6.h"
 #include "mbed.h"
-
-Serial  pc(PA_2, PA_3);
+#include "DS1820.h"
 
 char a[128] = "";       // RX command buffer
 char i = 0;             // RX char pointer
 static char recieved = 0;
 
+Serial  pc(PA_2, PA_3);
+
 // This function is called when a character goes into the RX buffer.
 void rxCallback() {
     char c;
@@ -34,10 +35,20 @@
     confSysClock();     //Configure system clock (72MHz HSE clock, 48MHz USB clock)
     DigitalOut  myled(LED1);
     
+    DS1820  ds1820(PA_9);    // substitute PA_9 with actual mbed pin name connected to the DS1820 data pin                             
+    float   temp = 0;
+    int     error = 0; 
+    
     pc.attach(&rxCallback, Serial::RxIrq);
     pc.baud(115200);  
     pc.printf("Hello world! Mbed version\r\n");
     
+    if(ds1820.begin()) {
+        pc.printf("DS1820 sensor found!\r\n");    
+    } else {
+        pc.printf("No DS1820 sensor found!\r\n");
+    };
+    
     while(1) {
         // The on-board LED is connected, via a resistor, to +3.3V (not to GND). 
         // So to turn the LED on or off we have to set it to 0 or 1 respectively
@@ -52,7 +63,26 @@
         myled = 0;      // turn the LED on
         wait_ms(50);   // 200 millisecond
         myled = 1;      // turn the LED off
-        wait_ms(1000);  // 1000 millisecond
+        
+        
+        
+        ds1820.startConversion();  // start temperature conversion from analog to digital
+            wait(1.0);                 // let DS1820 complete the temperature conversion 
+            error = ds1820.read(temp); // read temperature from DS1820 and perform cyclic redundancy check (CRC)
+            switch(error) {
+            case 0:    // no errors -> 'temp' contains the value of measured temperature
+                pc.printf("sensor temp = %3.1f%cC\r\n", temp, 176);
+                break;
+            case 1:    // no sensor present -> 'temp' is not updated
+                pc.printf("no sensor present\n\r");
+                break;
+            case 2:    // CRC error -> 'temp' is not updated
+                pc.printf("sensor CRC error\r\n");
+            } 
+        
+        
+        
+        
         if (recieved == 1) {
             
             // command was recieved