STM32F103C8T6_WIFI_Heating_system
Dependencies: mbed mbed-STM32F103C8T6 eeprom_flash Watchdog PinDetect DS1820
- Bluepill STM32F103C8T6 Heating system
- _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)
main.cpp
- Committer:
- andrewklmn
- Date:
- 2018-09-17
- Revision:
- 32:aebbfe391bbc
- Parent:
- 31:0a516ceaec4d
- Child:
- 33:2c54746f7518
File content as of revision 32:aebbfe391bbc:
#include "stm32f103c8t6.h" #include "mbed.h" #include "mbed_events.h" #include <stdio.h> #include "DS1820.h" #include "PinDetect.h" #include "Watchdog.h" #include <string> // Create a queue that can hold a maximum of 32 events EventQueue queue(32 * EVENTS_EVENT_SIZE); // Create a thread that'll run the event queue's dispatch function //Thread t; Watchdog wd; char a[128] = ""; // RX command buffer char i = 0; // RX char pointer static char recieved = 0; Serial pc(PA_2, PA_3); DigitalOut myled(LED1); float temp[5] = { 85,85,85,85,85 // initial temperature }; int temp_error[5] = { 0,0,0,0,0 // initial state }; string labels[5] = { "OUTDOOR", "LITOS", "MEBEL", "HOT WATER", "BACK WATER" }; DS1820 ds1820[5] = { DS1820(PA_9), // substitute PA_9 with actual mbed pin name connected to the OUTDOOR DS1820(PA_8), // substitute PA_8 with actual mbed pin name connected to the INDOOR LITOS DS1820(PA_7), // substitute PA_7 with actual mbed pin name connected to the INDOOR MEBEL DS1820(PA_6), // substitute PA_6 with actual mbed pin name connected to the HOT WATER DS1820(PA_5) // substitute PA_6 with actual mbed pin name connected to the HOT WATER }; // This function is called when a character goes into the RX buffer. void rxCallback() { char c; c = pc.getc(); if (recieved == 0){ // skip if command was already received if ( c == 0x0d || c == 0x0a ) { while ( pc.readable() ) c = pc.getc(); recieved = 1; } else { if (i==16){ // max length of command from SERIAL a[0] = c; a[1] = '\0'; i = 0; } else { a[i] = c; i++; a[i] = '\0'; }; }; }; }; void pb_hit_interrupt (void) { pc.printf("Button pressed\r\n"); }; void pb_out_interrupt (void) { pc.printf("Button unpressed\r\n"); }; void start_temp(){ __disable_irq(); for ( int j=0; j < 5; j++ ) { if(ds1820[j].begin()) { ds1820[j].startConversion(); pc.printf("%s sensor present!\r\n", labels[j].c_str()); } else { pc.printf("No %s sensor found!\r\n", labels[j].c_str()); }; }; __enable_irq(); }; void at_command(){ if (recieved == 1) { __disable_irq(); // command was recieved if (a[0]=='A' && a[1]=='T') { if ( a[2]=='\0') { //pc.printf(a); pc.printf("OK\r\n"); }; } else { pc.printf("Wrong request\r\n"); }; // process_command(a); __enable_irq(); // ready for new command recieved = 0; a[0] = '\0'; i = 0; }; }; void check_temp(){ myled = 0; // turn the LED on // kick the watchdog wd.Service(); __disable_irq(); for ( int j=0; j < 5; j++ ) { temp_error[j] = ds1820[j].read(temp[j]); // read temperature from DS1820 and perform cyclic redundancy check (CRC) switch(temp_error[j]) { case 0: // no errors -> 'temp' contains the value of measured temperature pc.printf("%s = %3.1fC \r\n", labels[j].c_str() , temp[j]); break; case 1: // no sensor present -> 'temp' is not updated pc.printf("no %s sensor present \r\n", labels[j].c_str() ); break; case 2: // CRC error -> 'temp' is not updated pc.printf("%s sensor CRC error \r\n", labels[j].c_str() ); }; // start temperature conversion from analog to digital ds1820[j].startConversion(); }; pc.printf("State %d|%d|%d|%d|%d\r\n", temp_error[0], temp_error[1], temp_error[2], temp_error[3], temp_error[4] ); pc.printf("Temp %3.1f|%3.1f|%3.1f|%3.1f|%3.1f\r\n", temp[0], temp[1], temp[2], temp[3], temp[4] ); pc.printf("======================================="); __enable_irq(); myled = 1; // turn the LED off }; int main() { confSysClock(); //Configure system clock (72MHz HSE clock, 48MHz USB clock) wd.Configure(5.0); PinDetect pb(PA_11); pb.mode(PullUp); // Delay for initial pullup to take effect wait(.005); pb.attach_deasserted(&pb_hit_interrupt); pb.attach_asserted(&pb_out_interrupt); //pb.rise(&pb_out_interrupt); pb.setSampleFrequency(); pc.attach(&rxCallback, Serial::RxIrq); pc.baud(115200); pc.printf("\r\n\r\nWifi Heating system\r\n"); queue.call( start_temp ); queue.call_every(100, at_command); queue.call_every(1000, check_temp); // Start queue queue.dispatch(); };