Diff: main.cpp

Revision:

0:0cdbc206e85f

Child:

2:9e45f00fd2de

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Feb 16 23:12:02 2017 +0000
@@ -0,0 +1,407 @@
+/******************************************************************************
+* MIT License
+*
+* Copyright (c) 2017 Justin J. Jordan
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to deal
+* in the Software without restriction, including without limitation the rights
+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+* copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+
+* The above copyright notice and this permission notice shall be included in all
+* copies or substantial portions of the Software.
+
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+* SOFTWARE.
+******************************************************************************/
+
+
+#include "mbed.h"
+#include "OneWire.h"
+#include "max32630fthr.h"
+#include "SDFileSystem.h"
+#include "Sharp_LS012B7DD01.h"
+
+using namespace OneWire;
+using namespace RomCommands;
+
+uint8_t printMessage(SharpLS012B7DD01 &lcd, const char * msg, uint8_t ln);
+uint8_t printRomId(SharpLS012B7DD01 &lcd, RomId &romId, uint8_t ln);
+
+
+Ticker oneSecondTicker;
+volatile uint32_t secondCounter = 0;
+void oneSecond()
+{
+    secondCounter++;
+}
+
+//Setup start/stop button
+DigitalIn sw2(P2_3, PullUp);
+InterruptIn startStopLog(P2_3);
+volatile bool startLog = false;
+void startStopLogISR()
+{
+    startLog = !startLog;
+}
+
+
+int main ()
+{
+    //Init board and set GPIO to 3.3V logic
+    MAX32630FTHR pegasus;
+    pegasus.init(MAX32630FTHR::VIO_3V3);
+    
+    
+    //Turn RGB LED off
+    DigitalOut rLED(LED1, LED_ON);
+    DigitalOut gLED(LED2, LED_OFF);
+    DigitalOut bLED(LED3, LED_OFF);
+    
+    
+    //Get LCD instance
+    SPI spiBus(P5_1, P5_2, P5_0);
+    SharpLS012B7DD01 lcd(P5_3, P5_4, P5_5, spiBus);
+    printMessage(lcd, "Starting...", 0);
+    wait(2.0);
+    lcd.clear_display();
+    
+    
+    //Get 1-Wire Master (owm) instance
+    #if defined(TARGET_MAX32630FTHR)
+        MCU_OWM owm(true, true);
+    #else //some other FTHR on mbed?
+        //Replace with appropriate pin names for your FTHR
+        I2C i2cBus(P3_4, P3_5); 
+        DS2484 owm(i2cBus);
+    #endif
+    
+    //Make sure owm is initialized
+    OneWireMaster::CmdResult result = owm.OWInitMaster();
+    while(result != OneWireMaster::Success)
+    {
+        printMessage(lcd, "Failed to init OWM...", 0);
+        result = owm.OWInitMaster();
+        wait(0.5);
+    }
+    lcd.clear_display();
+    printMessage(lcd, "OWM Initialized...", 0);
+    wait(2.0);
+    lcd.clear_display();
+    
+    
+    //Check for DS1920 iButton
+    SearchState search_state;
+    search_state.findFamily(0x10);
+    do
+    {
+        result = OWNext(owm, search_state);
+        if(search_state.romId.familyCode() != 0x10)
+        {
+            printMessage(lcd, "Failed to find DS1920...", 0);
+            printMessage(lcd, "Please connect DS1920...", 1);
+            wait(0.5);
+        }
+        else
+        {
+            lcd.clear_display();
+            printMessage(lcd, "Found DS1920...", 0);
+            printRomId(lcd, search_state.romId, 1);
+            wait(2.0);
+            lcd.clear_display();
+        }
+    }
+    while(search_state.romId.familyCode() != 0x10);
+    
+    //Get instance of DS1920 object
+    MultidropRomIterator selector(owm);
+    DS1920 tempSensor(selector);
+    tempSensor.setRomId(search_state.romId);
+    
+    
+    //Get instance of sd card file system
+    SDFileSystem sd(P0_5, P0_6, P0_4, P0_7, "sd");  // mosi, miso, sclk, cs
+    
+    //Configure pin for sd card detect
+    DigitalIn uSDdetect(P2_2, PullUp);
+    
+    static const char FILE_NAME[] = "/sd/log.txt";
+    FILE *fp;
+    
+    //Check for card
+    if(uSDdetect)
+    {
+        printMessage(lcd, "Please insert uSD card", 0);
+        while(uSDdetect);
+    }
+    lcd.clear_display();
+    
+    rLED = LED_ON;
+    gLED = LED_ON;
+    do
+    {
+        fp = fopen(FILE_NAME, "w");
+        if(fp != NULL)
+        {
+            lcd.clear_display();
+            printMessage(lcd, "Card detected...", 0);
+            printMessage(lcd, "Preparing log file...", 1);
+            fprintf(fp, "Time-Stamp, Battery Voltage, Temperature\n");
+            fclose(fp);
+        }
+        else
+        {
+            lcd.clear_display();
+            printMessage(lcd, "Failed to open file...", 0);
+            printMessage(lcd, "Press Reset Button...", 1);
+            wait(2.0);
+        }
+    }
+    while(fp == NULL);
+    rLED = LED_OFF;
+    gLED = LED_ON;
+    wait(2.0);
+    lcd.clear_display();
+    
+    
+    enum UiStates
+    {
+        Reset,
+        NoLog_NoCardDetected,
+        NoLog_CardDetected,
+        Log_NoCardDetected,
+        Log_CardDetected
+    };
+
+    UiStates currentState = Reset, oldState = Reset;
+    
+    static const uint32_t SAMPLE_INTERVAL = 5; // In seconds
+    bool firstSampleTaken = false;
+    uint32_t sampleTime = 0;
+    float batteryVoltage, temperature;
+    
+    //attach timer to callback for 1 second tick
+    oneSecondTicker.attach(&oneSecond, 1);
+    
+    //Tie SW2 to callback fx
+    startStopLog.fall(&startStopLogISR);
+    
+
+    while(1)
+    {
+        //card detect is active low
+        //Determine state, house keeping
+        if(!startLog && uSDdetect) //False, False
+        {
+            currentState = NoLog_NoCardDetected;
+            secondCounter = 0;
+            sampleTime = 0;
+            firstSampleTaken = false;
+        }
+        else if(!startLog && !uSDdetect) //False, True
+        {
+            currentState = NoLog_CardDetected;
+            secondCounter = 0;
+            sampleTime = 0;
+            firstSampleTaken = false;
+        }
+        else if(startLog && uSDdetect) //True, False
+        {
+            currentState = Log_NoCardDetected;
+            secondCounter = 0;
+            sampleTime = 0;
+            firstSampleTaken = false;
+        }
+        else //True, True
+        {
+            currentState = Log_CardDetected;
+            
+            //get t = 0 sample
+            if(!firstSampleTaken)
+            {
+                firstSampleTaken = true;
+                lcd.clear_display();
+                oldState = currentState;
+                
+                printMessage(lcd, "Logging Data...", 0);
+                pegasus.getBatteryVoltage(&batteryVoltage);
+                tempSensor.convertTemperature(temperature);
+                
+                rLED = LED_ON;
+                fp = fopen(FILE_NAME, "a");
+                if(fp != NULL)
+                {
+                    fprintf(fp, "%d, %f, %f\n", sampleTime, batteryVoltage, temperature);
+                    fclose(fp);
+                }
+                else
+                {
+                    lcd.clear_display();
+                    printMessage(lcd, "Failed to open file", 0);
+                    printMessage(lcd, "Press Reset Button...", 1);
+                    printMessage(lcd, "MBED DIE!!...", 2);
+                    mbed_die();
+                }
+                rLED = LED_OFF;
+            }
+        }
+        
+        //If state has changed, clear dispaly
+        if(oldState != currentState)
+        {
+            lcd.clear_display();
+            oldState = currentState;
+        }
+        
+        //State based actions
+        switch(currentState)
+        {
+            case NoLog_NoCardDetected:
+                printMessage(lcd, "Please insert uSD card...", 0);
+            break;
+            
+            case NoLog_CardDetected:
+                printMessage(lcd, "Press SW2 to start logging", 0);
+                printMessage(lcd, "data...", 1);
+            break;
+            
+            case Log_NoCardDetected:
+                startLog = false;
+                printMessage(lcd, "Please insert uSD card", 0);
+            break;
+            
+            case Log_CardDetected:
+            
+                if(secondCounter >= SAMPLE_INTERVAL)
+                {
+                    secondCounter = 0;
+                    sampleTime += SAMPLE_INTERVAL;
+                    
+                    printMessage(lcd, "Logging Data...", 0);
+                    pegasus.getBatteryVoltage(&batteryVoltage);
+                    tempSensor.convertTemperature(temperature);
+                    
+                    rLED = LED_ON;
+                    fp = fopen(FILE_NAME, "a");
+                    if(fp != NULL)
+                    {
+                        fprintf(fp, "%d, %f, %f\n", sampleTime, batteryVoltage, temperature);
+                        fclose(fp);
+                    }
+                    else
+                    {
+                        lcd.clear_display();
+                        printMessage(lcd, "Failed to open file", 0);
+                        printMessage(lcd, "Press Reset Button...", 1);
+                        printMessage(lcd, "MBED DIE!!...", 2);
+                        mbed_die();
+                    }
+                    rLED = LED_OFF;
+                }
+                
+            break;
+            
+            default:
+                lcd.clear_display();
+                printMessage(lcd, "Bad State...", 0);
+                printMessage(lcd, "Press Reset Button...", 1);
+                printMessage(lcd, "MBED DIE!!...", 2);
+                mbed_die();
+            break;
+        }
+    }    
+}
+
+
+//*********************************************************************
+uint8_t printMessage(SharpLS012B7DD01 &lcd, const char * msg, uint8_t ln)
+{
+    char temp_buff[31];
+    uint8_t buf_idx = 0;
+    temp_buff[buf_idx++] = '>';
+    temp_buff[buf_idx++] = '>';
+    for(; buf_idx < 30; buf_idx++)
+    {
+        temp_buff[buf_idx] = ' ';
+    }
+    buf_idx = 2;
+    
+    if(strlen(msg) <= 28)
+    {
+        memcpy((temp_buff + buf_idx), msg, strlen(msg));
+        temp_buff[buf_idx + strlen(msg)] = NULL;
+    
+        if(ln > 3)
+        {
+            lcd.clear_display();
+            ln = 0;
+        }
+        lcd.print_str(ln++, 0, temp_buff);
+    }
+    return ln;
+}
+
+
+//*********************************************************************
+uint8_t printRomId(SharpLS012B7DD01 &lcd, RomId &romId, uint8_t ln)
+{
+    int8_t idx = 7;
+    uint8_t temp_hi, temp_lo;
+    
+    char temp_buff[31];
+    uint8_t buf_idx = 0;
+    temp_buff[buf_idx++] = '>';
+    temp_buff[buf_idx++] = '>';
+    for(; buf_idx < 30; buf_idx++)
+    {
+        temp_buff[buf_idx] = ' ';
+    }
+    buf_idx = 2;
+    
+    do
+    {
+        
+        temp_hi = ((romId.buffer[idx] & 0xF0) >> 4);
+        temp_lo = (romId.buffer[idx--] & 0x0F);
+        
+        //get high nib in ascii
+        if(temp_hi < 10)
+        {
+            temp_buff[buf_idx++] = (temp_hi + 0x30);
+        }
+        else
+        {
+            temp_buff[buf_idx++] = ((temp_hi - 10) + 0x41);
+        }
+        
+        //get low nib in ascii
+        if(temp_lo < 10)
+        {
+            temp_buff[buf_idx++] = (temp_lo + 0x30);
+        }
+        else
+        {
+            temp_buff[buf_idx++] = ((temp_lo - 10) + 0x41);
+        }
+        
+        temp_buff[buf_idx++] = ' ';
+    }
+    while(idx >= 0);
+    temp_buff[buf_idx++] = NULL;
+    
+    if(ln > 3)
+    {
+        lcd.clear_display();
+        ln = 0;
+    }
+    lcd.print_str(ln++, 0, temp_buff);
+    
+    return ln;
+}