File content as of revision 12:d088f8024cf0:

// Paramater Allocation
// Paramater: 17
// Log Option: 1 (uSD)
// Watchdog Pulse Length: 6ms
// Watchdog Repetion Rate: 0.5
// Error Display: 1 (LCD)
// Execution time display: Task5 (LDC display) 
 


#include "mbed.h"
#include "MCP23017.h"
#include "WattBob_TextLCD.h"
#include "SDFileSystem.h"
#include "tasks.h"
#include "rtos.h"

#define     BACK_LIGHT_ON(INTERFACE)    INTERFACE->write_bit(1,BL_BIT)
#define     BACK_LIGHT_OFF(INTERFACE)    INTERFACE->write_bit(0,BL_BIT)

// Pointers to LCD Screen
MCP23017            *par_port;  // pointer to 16-bit parallel I/O chip
WattBob_TextLCD     *lcd;       // pointer to 2*16 character LCD object
FILE                *fo;        // pointer to uSD object

// Digital I/O p11 to p20
DigitalIn Fq(p11);            // Digital frequency in for measurement
DigitalIn DS(p12);            // Digital switch input
DigitalIn DS_s(p13);          // Digital shutdown switch
DigitalOut WD_pulse_out(p14);       // Watchdog Pulse
SDFileSystem sd(p5, p6, p7, p8, "sd");    //uSD pinout

// Analogue I/O p15 to p20
AnalogIn A1_(p15);            // Analogue input to be filtered  
AnalogIn A2_(p16);            // Analogue input to be filtered

// Timer objects
Thread tick;                    // Clock timer for CycExec
Timer timer;                    // Frequency Timer
Timer T5;                       // Timer for idle states

// Constant Declaration
const int SampFreq = 100;       // Sampling Frequency
const int WD = 6000;            // Watchdog pulse length

// Variable Declaration
long int tck = 0;               // Used to define what task is called (CycExec)

bool FqIn = Fq;                 // Frequency input boolean
int period = 0;                 // Frequency timer variable (Frequency Check)
int freq = 0;                   // Frequency return variable (Frequency Check)

bool DSIn = DS;                 // Switch Input boolean
int switch_state = 0;          // Switch high or low (Digital In)

int WD_pulse;


int A1_in = A1_;                      // Analogue 1 input variable
int A2_in = A2_;                      // Analogue 2 input variable    
int A1_val = 0;                 // Analogue 1 return variable (Analogue In)
int A2_val = 0;                 // Analogue 2 return variable (Analogue In)

bool DS_sIn = DS_s;              // Shutdown Switch boolean
int error_code = 0;             // Error code variable

int logcount = 0;               // Keep track of log number

////////////////////////////////////////////////////////////////////////////////
//
// Main Program
//
void CycExec();

int main()
{
    // LCD Init
    par_port = new MCP23017(p9, p10, 0x40); // initialise 16-bit I/O chip
    lcd = new WattBob_TextLCD(par_port);    // initialise 2*26 char display
    par_port->write_bit(1,BL_BIT);          // turn LCD backlight ON
    lcd->cls(); // clear display 
    
    // .csv log Init
    fo = fopen ("/sd/log.txt", "a");       // Pointer to log file on uSD
    fprintf(fo, "Log of Frazer Legge's Embedded Software Assignment 2\n\n"); 
    
    // 
//    tick.attach(&CycExec, 0.025);           // Period set to 25ms
    while(1){
        tick.start(&CycExec);
        wait_ms(25);
        }
}

void CycExec()
{
    if(tck % 40 == 4){       // Every Second (needs offset)
        Task1(timer, FqIn, SampFreq, period, freq);
    }
    else if(tck % 13 == 8){  // Every 1/3 sec
        Task2(DSIn, switch_state);
    }
    else if(tck % 80 == 7){  // Every 2 sec
        Task3(WD_pulse_out, WD);
    }
    else if(tck % 20 == 0){  // Every 1/2 sec
        Task4(A1_val, A2_val, A1_in, A2_in);
    }
    else if(tck % 80 == 1){  // Every 2 sec 
        Task5(freq, switch_state, A1_val, A2_val);
    }
    else if(tck % 20 == 3){  // Every 0.5 sec
        Task6(switch_state, A1_val, A2_val, error_code);
    }
    else if(tck % 20 == 10){  // Every 1/2 sec
        Task7(logcount, freq, switch_state, A1_val, A2_val);
    }
    //else{
    //   Task8(DS_sIn, tick, T5);
    //}
    tck++;
    WD_pulse_out = WD_pulse;
}