(DA) Internet of Things and Smart Electronics- ELE3006M2122
Final tidy of code following installation of new sensor, more comments added prior to submission
Dependencies: mbed
main.cpp
- Committer:
- legstar85
- Date:
- 2022-01-24
- Revision:
- 15:0cd78b44ea83
- Parent:
- 14:3e9991fe64e5
- Child:
- 16:c63a5d084db0
File content as of revision 15:0cd78b44ea83:
/*
* Prints a string of characters to the screen buffer, string is cut off after the 83rd pixel.
* @param x - the column number (0 to 83)
* @param y - the row number (0-5) - the display is split into 6 banks - each bank can be considered a row
*
* @ File main.cpp
* @ Author - David Leaming - 25574043
* @ Date - January 2022
*
* Acknowledgements
* Craig A. Evans, University of Leeds, TMP102 Library, Feb 2016
* Dr Edmond Nurellari, University of Lincoln, Joystick, N5110 Libraries & SD Card Libraries
* Paul Staron, Piezo Buzzer utility, April 2019
*/
#include "mbed.h" // include the library header, ensure the library has been imported into the project
#include "TMP102.h"
#include "N5110.h"
#include "Joystick.h"
#include "Bitmap.h"
#include "SDFileSystem.h"
TMP102 tmp102(I2C_SDA,I2C_SCL); // Create TMP102 object
// VCC,SCE,RST,D/C,MOSI,SCLK,LED
N5110 lcd(PTC9,PTC0,PTC7,PTD2,PTD1,PTC11); // Create Screen Object - K64F - pwr from 3V3, GND Pin also needs connecting
// y x button
Joystick joystick(PTB10,PTB11,PTC16); // Define Joystick Object
SDFileSystem sd(PTE3, PTE1, PTE2, PTE4, "sd"); // MOSI, MISO, SCK, CS - Connections to SD card holder on K64F (SPI interface)
Serial pc(USBTX,USBRX); // UART connection for PC
struct State { // Struct for state
int output; // output value
float time; // time in state
int nextState[9]; // array of next states
};
State fsm[11] = {
{15,0.5,{0,1,0,0,0,10,0,0,0}}, // State 0 - 15 Degrees
{16,0.5,{1,2,1,1,1,0,1,1,1}}, // State 1 - 16 Degrees
{17,0.5,{2,3,2,2,2,1,2,2,2}}, // State 2 - 17 Degrees
{18,0.5,{3,4,3,3,3,2,3,3,3}}, // State 3 - 18 Degrees
{19,0.5,{4,5,4,4,4,3,4,4,4}}, // State 4 - 19 Degrees
{20,0.5,{5,6,5,5,5,4,5,5,5}}, // State 5 - 20 Degrees
{21,0.5,{6,7,6,6,6,5,6,6,6}}, // State 6 - 21 Degrees
{22,0.5,{7,8,7,7,7,6,7,7,7}}, // State 7 - 22 Degrees
{23,0.5,{8,9,8,8,8,7,8,8,8}}, // State 8 - 23 Degrees
{24,0.5,{9,10,9,9,9,8,9,9,9}}, // State 9 - 24 Degrees
{25,0.5,{10,1,10,10,10,9,10,10,10}} // State 10 - 25 Degrees
};
Ticker ticker_menu; // Create Menu ticker object
DigitalOut r_led(LED_RED); // K64F on-board LEDs
DigitalOut g_led(LED_GREEN); // K64F on-board LEDs
DigitalOut b_led(LED_BLUE); // K64F on-board LEDs
PwmOut LED01 (PTA1); // PCB Surface Mounted LED's - LED1
PwmOut LED02 (PTA2); // PCB Surface Mounted LED's - LED2
PwmOut LED03 (PTC2); // PCB Surface Mounted LED's - LED3
PwmOut LED04 (PTC3); // PCB Surface Mounted LED's - LED4
PwmOut LED05 (PTC4); // PCB Surface Mounted LED's - LED5
PwmOut LED06 (PTD3); // PCB Surface Mounted LED's - LED6
PwmOut Buzzer (PTC10); // PCB Surface Mounted Piezo Buzzer
InterruptIn sw2(SW2); // K64F on-board switches
InterruptIn sw3(SW3); // K64F on-board switches
InterruptIn ButtonA (PTB9); // PCB Button - A
InterruptIn ButtonB (PTD0); // PCB Button - B
InterruptIn ButtonBack (PTB10); // PCB Button - Back
volatile int g_ButtonA_flag = 0; // Flag - must be volatile as changes within ISR - g_ prefix makes it easier to distinguish it as global
volatile int g_ButtonB_flag = 0; // Flag - must be volatile as changes within ISR - g_ prefix makes it easier to distinguish it as global
volatile int g_ButtonBack_flag = 0; // Flag - must be volatile as changes within ISR - g_ prefix makes it easier to distinguish it as global
volatile int g_sw2_flag = 0; // Flag - must be volatile as changes within ISR - g_ prefix makes it easier to distinguish it as global
volatile int g_menu_timer_flag = 0; // Flag - must be volatile as changes within ISR - g_ prefix makes it easier to distinguish it as global
volatile int option = 0; // Menu option selection based on joystick direction
volatile int g_state = 0; //
volatile int g_StartTemp = 0; //
void error(); // error function hangs flashing an LED
void init_serial(); // setup serial port
void init_K64F(); // set-up the on-board LEDs and switches
void init_PCB(); // set-up the PCB LEDs and buttons
void ButtonA_isr(); //
void ButtonB_isr(); //
void ButtonBack_isr(); //
void sw2_isr(); //
void menu_timer_isr(); //
void OnStartup(); //
void Run(); //
void StartTemp(); //
void delete_file(char filename[]); //
void WriteToFile(); // Function to attempt to write temperature to file
void OneOff(); //
int main()
{
init_K64F(); // initialise the board
init_serial(); // initialise the serial port
init_PCB(); // initialise the PCB
tmp102.init(); // call the sensor init method using dot syntax
lcd.init(); // initialise display
joystick.init(); // initialise joystick
ticker_menu.attach(&menu_timer_isr,0.2); // Attach ticker for the Joystick
sw2.fall(&sw2_isr); // SW2 has a pull-up resistor, so the pin will be at 3.3 V by default and fall to 0 V when pressed. We therefore need to look for a falling edge on the pin to fire the interrupt
ButtonA.rise(&ButtonA_isr); // External push button, pin set to 0V by pull down command, means a rising edge is looked for
ButtonB.rise(&ButtonB_isr); // External push button, pin set to 0V by pull down command, means a rising edge is looked for
lcd.setContrast(0.5); // change set contrast in range 0.0 to 1.0
OnStartup(); // Call intro screen
Run(); // Call main-menu and functions
}
void init_serial() {
pc.baud(115200); // set to highest baud - ensure terminal software matches
}
void init_K64F()
{
r_led = 1; // on-board LEDs are active-low, so set pin high to turn them off.
g_led = 1; // on-board LEDs are active-low, so set pin high to turn them off.
b_led = 1; // on-board LEDs are active-low, so set pin high to turn them off.
sw2.mode(PullNone); // since the on-board switches have external pull-ups, we should disable the internal pull-down
sw3.mode(PullNone); // resistors that are enabled by default using InterruptIn
}
void init_PCB ()
{
LED01 = 1; // PCB surface mounted LED's are active low - write a 1 to turn them off initiallly
LED02 = 1; // PCB surface mounted LED's are active low - write a 1 to turn them off initiallly
LED03 = 1; // PCB surface mounted LED's are active low - write a 1 to turn them off initiallly
LED04 = 1; // PCB surface mounted LED's are active low - write a 1 to turn them off initiallly
LED05 = 1; // PCB surface mounted LED's are active low - write a 1 to turn them off initiallly
LED06 = 1; // PCB surface mounted LED's are active low - write a 1 to turn them off initiallly
Buzzer = 0; // Ensure Piezo Buzzer is off
ButtonA.mode(PullDown); // Set pin to Pull Down to OV, meaning that a rising edge is looked for when button is pressed
ButtonB.mode(PullDown); // Set pin to Pull Down to OV, meaning that a rising edge is looked for when button is pressed
}
void ButtonA_isr() // ButtonA event-triggered interrupt
{
g_ButtonA_flag = 1; // set flag in ISR
}
void ButtonB_isr() // ButtonB event-triggered interrupt
{
g_ButtonB_flag = 1; // set flag in ISR
}
void ButtonBack_isr() // ButtonB event-triggered interrupt
{
g_ButtonBack_flag = 1; // set flag in ISR
}
void sw2_isr() // SW2 event-triggered interrupt
{
g_sw2_flag = 1; // set flag in ISR
}
void menu_timer_isr()
{
g_menu_timer_flag = 1; // set flag in ISR
}
void OnStartup() // Run some start up display
{
Buzzer.period(1.0/659.0); // Welcome sounds from Piezo
Buzzer = 0.5; //
wait(0.5); //
Buzzer.period(1.0/494.0); //
Buzzer = 0.5; //
wait(0.5); //
Buzzer.period(1.0/554.0); //
Buzzer = 0.5; //
wait(0.5); //
Buzzer = 0; // Turn off welcome sounds
lcd.clear(); // Clear buffer at start of every loop
lcd.printString("--------------",0,0); // Can directly print strings at specified co-ordinates (must be less than 84 pixels to fit on display)
lcd.printString(" Smart Cold",0,1); // Just a welcome message before auto moving to main menu
lcd.printString(" Storage",0,2); //
lcd.printString(" Monitoring",0,3); //
lcd.printString("V16 - Jan 2022",0,4); //
lcd.printString("--------------",0,5); //
lcd.refresh(); // Need to refresh display after setting pixels or writing strings
wait(5.0); // Leave welcome screen on for designated amount of time
lcd.clear(); // Clear buffer at start of every loop
lcd.refresh(); // Need to refresh display after setting pixels or writing strings
lcd.printString("--------------",0,0); //
lcd.printString(" Use Joystick",0,1); // Instruction for use of menu
lcd.printString(" To Navigate",0,2); //
lcd.printString("",0,3); // Blank Line
lcd.printString(" A = Select",0,4); //
lcd.printString("--------------",0,5); //
lcd.refresh(); // Need to refresh display after setting pixels or writing strings
wait(5.0); //
init_PCB(); // Ran again to ensure all LED's etc are turned off
printf("Transition to Temp Selection %i\n",StartTemp); // Observe on serial port - ensure transition to correct screen
}
enum EMenuState // An enum controlling the current state of the display.
{
MENUSTATE_StartTemp, // Defining each menu state to be called upon later
MENUSTATE_Main, // Defining each menu state to be called upon later
MENUSTATE_Monitor, // Defining each menu state to be called upon later
MENUSTATE_OneOff, // Defining each menu state to be called upon later
MENUSTATE_Results, // Defining each menu state to be called upon later
MENUSTATE_About, // Defining each menu state to be called upon later
MENUSTATE_Author, // Defining each menu state to be called upon later
MENUSTATTE_Num, // This is a special enum value that just gives is a way to get the number of elements in the enum.
};
void Run()
{
int MenuState = MENUSTATE_StartTemp; // Ensuring that the first Menu State to be brought up is the Temperature Selection Page
int SelectedItem = 0; //
int NumMenuItems = 1; //
char buffer[14]; // Each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
while(1){
if (g_menu_timer_flag){ //
g_menu_timer_flag = 0; //
bool bAButtonWasPressed = g_ButtonA_flag; // Get the value of the input flags and reset them
bool bBButtonWasPressed = g_ButtonB_flag; // Get the value of the input flags and reset them
g_ButtonA_flag = 0; //
g_ButtonB_flag = 0; //
lcd.clear(); // clear buffer at start of every loop
int NewMenuState = MENUSTATTE_Num; // The new menu we want to transition to, if any.
switch(MenuState) // Update and Draw whichever menu we're on.
{
case MENUSTATE_StartTemp: //
{
NumMenuItems = 1; // Details number of items in the menu. We need this to wrap the selection around properly etc.
if(SelectedItem >= NumMenuItems) //
{
SelectedItem = 0; // Something has gone wrong, reset selected item.
}
Direction d = joystick.get_direction();
StartTemp();
float g_StartTemp = fsm[g_state].output; // read temperature and print to lcd
pc.printf("T = %f C\n",g_StartTemp); // Print to serial - allows testing without device attached
printf ("Joystick Direction Points = %i\n",d); //
printf ("State selected = %i\n", g_state); //
int length = sprintf(buffer," T = %.2f C",g_StartTemp); // print formatted data to buffer - it is important the format specifier ensures the length will fit in the buffer
if (length <= 14){ // if string will fit on display (assuming printing at x=0)
lcd.printString("- Set Target -",0,0); //
lcd.printString("---- Temp ----",0,1); //
lcd.printString(buffer,0,3); // display on screen
lcd.printString("'A' to Select",0,5); //
lcd.refresh();
} // need to refresh display after setting pixels or writing strings
if(bAButtonWasPressed) // If A was pressed then we transition to the selected screen.
{
if(SelectedItem == 0) // If 0 line is selected, move to detailed menu
{ // Actually 0 line + 1, see circle draw and selection below
NewMenuState = MENUSTATE_Main; //
}
}
}
break; //
case MENUSTATE_Main: //
{
NumMenuItems = 5; // Details number of items in the menu. We need this to wrap the selection around properly etc.
if(SelectedItem >= NumMenuItems) //
{
SelectedItem = 0; // Something has gone wrong, reset selected item.
}
lcd.printString("---- MENU ----",0,0); // Menu title and selectable options
lcd.printString("M1 - Monitor",0,1); // Printed to the LCD screen
lcd.printString("M2 - One-off",0,2); //
lcd.printString("Results",0,3); //
lcd.printString("About",0,4); //
lcd.printString("Author",0,5); //
if(bAButtonWasPressed) // If A was pressed then we transition to the selected screen.
{
if(SelectedItem == 0) // If 0 line is selected, move to detailed menu
{ // Actually 0 line + 1, see circle draw and selection below
NewMenuState = MENUSTATE_Monitor; //
}
else if(SelectedItem == 1) // If 1 line is selected, move to detailed menu
{ // Actually 1 line + 1, see circle draw and selection below
NewMenuState = MENUSTATE_OneOff; //
}
else if(SelectedItem == 2) // If 2 line is selected, move to detailed menu
{ // Actually 2 line + 1, see circle draw and selection below
NewMenuState = MENUSTATE_Results; //
}
else if(SelectedItem == 3) // If 3 line is selected, move to detailed menu
{ // Actually 3 line + 1, see circle draw and selection below
NewMenuState = MENUSTATE_About; //
}
else if(SelectedItem == 4) // If 4 line is selected, move to detailed menu
{ // Actually 4 line + 1, see circle draw and selection below
NewMenuState = MENUSTATE_Author; //
}
}
}
break; //
case MENUSTATE_Monitor: // Call constant measurement menu following top menu selection
{
NumMenuItems = 1; // Detail the number of items in Menu - need this to wrap the selection around properly etc.
if(SelectedItem >= NumMenuItems) //
{
NewMenuState = MENUSTATE_Main; // Something has gone wrong, drop back to the main menu.
}
float T = tmp102.get_temperature(); // read temperature and print to lcd
pc.printf("T = %f K\n",T); // Print to serial - allows testing without device attached
int length = sprintf(buffer," T = %.2f C",T); // print formatted data to buffer - it is important the format specifier ensures the length will fit in the buffer
if (length <= 14) // if string will fit on display (assuming printing at x=0)
lcd.printString("-- Constant --",0,0); //
lcd.printString("- Monitoring -",0,1); //
lcd.printString(buffer,0,3); // display on screen
lcd.printString(" 'A' to Menu",0,5); //
lcd.refresh(); // need to refresh display after setting pixels or writing strings
wait(0.5); //
if (T >= g_StartTemp + 2) { // High temp alarm condition - in real world would be lot lower!!
LED01 = !LED01; // Flash LED01 if temperature is over specified - Simulated starting of cold blowers
LED02 = !LED02; // Flash LED02 if temperature is over specified - Simulated starting of cold blowers
LED03 = !LED03; // Flash LED03 if temperature is over specified - Simulated starting of cold blowers
printf("WARNING - High Temp!! \n"); //
Buzzer.period(1.0/554.0); // Warning Buzzer to extremely high
Buzzer = 0.5; //
wait(0.5); //
Buzzer = 0; //
}
else {
LED01 = 1; // LED01 off if temperature is below specified - Simulated stopping of cold blowers
LED02 = 1; // LED01 off if temperature is below specified - Simulated stopping of cold blowers
LED03 = 1; // LED01 off if temperature is below specified - Simulated stopping of cold blowers
Buzzer = 0; // Buzzer off if temperature is below specified - Simulated stopping of cold blowers
}
if (T <= g_StartTemp - 2) { // High temp alarm condition - in real world would be lot lower!!
LED04 = !LED04; // Flash LED01 if temperature is over specified - Simulated starting of heaters
LED05 = !LED05; // Flash LED02 if temperature is over specified - Simulated starting of heaters
LED06 = !LED06; // Flash LED03 if temperature is over specified - Simulated starting of heaters
printf("WARNING - Low Temp!! \n"); //
Buzzer.period(1.0/554.0); // Warning Buzzer to extremely high
Buzzer = 0.5; //
wait(0.5); //
Buzzer = 0; //
}
else {
LED04 = 1; // LED01 off if temperature is below specified - Simulated stopping of heaters
LED05 = 1; // LED01 off if temperature is below specified - Simulated stopping of heaters
LED06 = 1; // LED01 off if temperature is below specified - Simulated stopping of heaters
Buzzer = 0; // Buzzer off if temperature is below specified - Simulated stopping of heaters
}
if(bAButtonWasPressed) // Check if button was pressed
{
if(SelectedItem == 0) //
{
NewMenuState = MENUSTATE_Main; // Transition back to the main menu
LED01 = 1; // Turn off LED upon transition back to main menu
LED02 = 1; // Turn off LED upon transition back to main menu
LED03 = 1; // Turn off LED upon transition back to main menu
LED04 = 1; // Turn off LED upon transition back to main menu
LED05 = 1; // Turn off LED upon transition back to main menu
LED06 = 1; // Turn off LED upon transition back to main menu
}
}
}
break;
case MENUSTATE_OneOff: // Call a one off measurement menu following top menu selection
{
NumMenuItems = 1; // Detail the number of items in Menu - need this to wrap the selection around properly etc.
if(SelectedItem >= NumMenuItems) //
{
NewMenuState = MENUSTATE_Main; // Something has gone wrong, drop back to the main menu.
}
OneOff(); // read temperature and print to lcd
if(bAButtonWasPressed) // Check if button was pressed
{
if(SelectedItem == 0) //
{
NewMenuState = MENUSTATE_Main; // Take us back to top menu
}
}
}
break;
case MENUSTATE_Results: // Call results menu following top menu selection
{
NumMenuItems = 1; // Detail the number of items in Menu - need this to wrap the selection around properly etc.
if(SelectedItem >= NumMenuItems) //
{
NewMenuState = MENUSTATE_Main; // Something has gone wrong, drop back to the main menu.
}
WriteToFile(); //
lcd.printString("--- Results ---",0,0); //
lcd.printString(" ",0,1); //
lcd.printString(" ",0,2); //
lcd.printString(" ",0,3); //
lcd.printString(" ",0,4); //
lcd.printString(" 'A' to Menu",0,5); //
if(bAButtonWasPressed) // Check if button was pressed
{
if(SelectedItem == 0) //
{
NewMenuState = MENUSTATE_Main; // Take us back to top menu
}
}
}
break;
case MENUSTATE_About: // Call About menu following top menu selection
{
NumMenuItems = 1; // Detail the number of items in Menu - need this to wrap the selection around properly etc.
if(SelectedItem >= NumMenuItems) //
{
NewMenuState = MENUSTATE_Main; // Something has gone wrong, drop back to the main menu.
}
lcd.printString("--- About ---",0,0); //
lcd.printString("ELE3006M - IoT",0,1); //
lcd.printString(" Project",0,2); //
lcd.printString("Uni of Lincoln",0,3); //
lcd.printString(" 'A' to Menu",0,5); //
lcd.refresh(); //
if(bAButtonWasPressed) // Check if button was pressed
{
if(SelectedItem == 0) //
{
NewMenuState = MENUSTATE_Main; // Transition back to Main Menu
}
}
}
break;
case MENUSTATE_Author: // Call Author menu following top menu selection
{
NumMenuItems = 1; // Detail the number of items in Menu - need this to wrap the selection around properly etc.
if(SelectedItem >= NumMenuItems) //
{
NewMenuState = MENUSTATE_Main; // Something has gone wrong, drop back to the main menu.
}
lcd.printString("--- Author ---",0,0); //
lcd.printString("David Leaming ",0,1); //
lcd.printString(" 25574043 ",0,2); //
lcd.printString(" VolkerRail",0,3); //
lcd.printString(" 'A' to Menu",0,5); //
if(bAButtonWasPressed) // Check if button was pressed
{
if(SelectedItem == 0) //
{
NewMenuState = MENUSTATE_Main; // Take us back to top menu
}
}
}
break;
default:
{
NewMenuState = MENUSTATE_Main; // Something has gone wrong, drop back to the main menu.
}
};
if(NewMenuState != MENUSTATTE_Num) // If we have requested a new menu state.
{
printf("Transitioning to MenuState: %i\n", NewMenuState); // Observe on serial port - ensure transition to correct screen
MenuState = NewMenuState; // We want to transition the menu to a new state.
// Do any bookkeeping needed when moving to new state.
SelectedItem = 0; // Reset the selected item.
lcd.clear(); // Clear the display for one frame on state transition.
}
else
{
unsigned int SelectionMarkerRadius = 4; // If we have not selected to move to a new menu.
unsigned int SelectionMarkerX = WIDTH - (2 * SelectionMarkerRadius); // Draw a marker circle at end of line to show which is the currently selected item.
unsigned int SelectionMarkerY = (HEIGHT / 5) * (SelectedItem + 1); // +1 because of the menu title being on first row
lcd.drawCircle(SelectionMarkerX, SelectionMarkerY, SelectionMarkerRadius, FILL_BLACK); // Fill the circle black so it can be seen easily
// Handle Joystick Input
Direction d = joystick.get_direction();
printf("Direction = %i\n");
switch (joystick.get_direction()) { // Call to check direction joystick is pointing
case N:
{
SelectedItem--;
printf("Selection decremented to %i\n", SelectedItem);
}
break; //
case S:
{
SelectedItem++;
printf("Selection incremented to %i\n", SelectedItem);
}
break; //
}
if(SelectedItem < 0) // Wrap the selection around to the start/end of the menu if it goes below 0 or above NumMenuItems.
{
SelectedItem = NumMenuItems - 1; //
}
else if(SelectedItem >= NumMenuItems) //
{
SelectedItem = 0; //
}
}
lcd.refresh(); // Finally update the display.
}
}
}
void StartTemp() //
{
Direction d = joystick.get_direction(); //
g_StartTemp = fsm[g_state].output; // set ouput depending on current state
wait(fsm[g_state].time); // wait in that state for desired time
g_state = fsm[g_state].nextState[d]; // read input and update curent state
}
void WriteToFile() // Function to attempt to write temperature to file
{
printf("#### SD Card Example #####\n");
FILE *fp; // this is our file pointer
float T = tmp102.get_temperature(); // read temperature and print to lcd
pc.printf("T = %f K\n",T); // Print to serial - allows testing without device attached
fp = fopen("/sd/overnighttemp", "w"); //
int ONight_Temp = T; //
if (fp == NULL) { // if it can't open the file then print error message
printf("Error! Unable to open file!\n");
}
else { // opened file so can write
printf("Writing to file....");
for(int i = T; i <= 50; i++) {
float T = 1000.0F/i; // dummy variable
fprintf(fp, "%d,%f\n",i,T); // print formatted string to file (CSV)
}
printf("Done.\n");
fclose(fp); // ensure you close the file after writing
}
}
void OneOff() //
{
char buffer[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
lcd.clear(); //
float T = tmp102.get_temperature(); // read temperature and print to lcd
pc.printf("T = %f K\n",T); // Print to serial - allows testing without device attached
int length = sprintf(buffer," T = %.2f C",T); // print formatted data to buffer - it is important the format specifier ensures the length will fit in the buffer
if (length <= 14){ // if string will fit on display (assuming printing at x=0)
lcd.printString("-- One-Off --",0,0); //
lcd.printString("-- Measure --",0,1); //
lcd.printString(buffer,0,3); // display on screen
lcd.printString(" 'A' to Menu",0,5); //
} //
} //