File content as of revision 17:bc25d5f47bab:

// 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 "main.h"

// 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                *fp;        // pointer to uSD object

SDFileSystem sd(p5, p6, p7, p8, "sd");    //uSD pinout

// Digital I/O p11 to p20
DigitalIn Fq(p14);              // Digital frequency in for measurement
DigitalIn DS(p12);              // Digital switch input
DigitalIn DS_s(p13);            // Digital shutdown switch
DigitalOut WD_pulse(p11);       // Watchdog Pulse
DigitalOut led1(LED1);
DigitalOut led2(LED2);

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

// Timer objects
Ticker ticker;                  // Ticker for CycExec
Timer timer;                    // Frequency Timer
Timer T5;                       // Timer for idle states

// Constant Declaration
const int WD = 6000;            // Watchdog pulse length

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

float freq;                     // Frequency read variable

int switch_state;               // Output switch 1

float A1_In;                    // Analogue 1 Input
float A2_In;                    // Analogue 2 Input
float A1_val;                   // Analogue 1 return variable (Analogue In)
float A2_val;                   // Analogue 2 return variable (Analogue In)

int error_code;                 // Error code variable

int logcount;                   // Keep track of log number



////////////////////////////////////////////////////////////////////////////////
//
// Main Program
//

void CycExec()
{

    if(tck % 20 == 0) {         // Every 1 sec          freq
        Task1();
    } else if(tck % 6 == 1) {   // Every 1/3 sec        Dig In
        Task2();
    } else if(tck % 40 == 2) {  // Every 2 sec          WD
        Task3();
    } else if(tck % 10 == 3) {  // Every 1/2 sec        Ana In
        Task4();
    } else if(tck % 40 == 4) {  // Every 2 sec          LCD
        Task5a();
    } else if(tck % 40 == 5) {  // Every 1/2 sec        LCD
        Task5b();
    } else if(tck % 10 == 6) {  // Every 0.5 sec        Error
        Task6();
    } else if(tck % 10 == 7) {  // Every 1/2 sec        Log
        Task7();
    } else if(tck % 10 == 8) {  // Every 1/2 sec        Shutdown
        Task8();
    }

    led2 = !led2;               // Shows CycExec running

    tck++;                      // Increment tck register every cycle. Starts tasks.
}


int main()
{
    // LCD Init
    par_port = new MCP23017(p9, p10, 0x40); // initialise 16-bit I/O chip
    par_port->config(0x0F00, 0x0F00, 0x0F00);

    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

    // Create .txt file on uSD
    mkdir("/sd/logs", 0777);
    fp = fopen ("/sd/logs/log.txt", "w");   // Pointer to log file on uSD
    fprintf(fp, "Log of Frazer Legge's Embedded Software Assignment 2\n\n");
    fprintf(fp, "Log,Frequency,DigitalIn,Analogue1,Analogue2\n\n");

    ticker.attach(&CycExec, 0.05);          // Period set to 50ms

    while(1) {                              // Indicator to show CycExec was started 
        led1 = !led1;
        wait(0.2);
    }
}