Diff: TempSense.h

Revision:

0:bab80a319f0d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TempSense.h	Tue Mar 06 18:24:17 2018 +0000
@@ -0,0 +1,156 @@
+#include "mbed.h"
+
+//---------------------------------------------------------
+//Enter amount of minutes between each log
+int minutesPerLog = 15;
+
+//Enter amount of seconds for the log screen to show
+int logTimer = 20;
+//---------------------------------------------------------
+
+//I2C pins
+I2C i2c(PB_9, PB_8); //SDA, SCL | D14 , D15
+
+int getTemp(void);
+void displayLog(int *);
+void initScreen(void);
+
+LCD_DISCO_F746NG LCDscreen;
+TS_StateTypeDef touchStatus;
+TS_DISCO_F746NG LCDtouchScreen;
+
+/**
+  * @brief  Displays the temperature
+  * @retval None
+  */
+void tempDisplay(void)
+{
+    //If the log is recording every 0 minutes do not show log
+    if (minutesPerLog == 0) {
+        return;
+    }
+
+    initScreen();
+    i2c.frequency(100000);
+
+    int counter = 0;
+    unsigned short StringX = 0;
+    unsigned short StringY = 250;
+    unsigned char helpDisplay[100] = {"Hold screen for Log"};
+    unsigned char tempDisplay[100];
+    int tempLog[10] = {0};
+
+    //Reset screen after log display
+back:
+    LCDscreen.Clear(LCD_COLOR_BLUE);
+    LCDscreen.DisplayStringAt(0, 0, helpDisplay, LEFT_MODE);
+
+    //Main loop
+    while(1) {
+        counter++;
+        //Grabs temp and puts it into display portion of log [0], also adds one
+        //second delay
+        int temp = getTemp();
+        tempLog[0] = temp;
+
+        //Checks to see if time has been met for a log update
+        if (counter >= (minutesPerLog * 60)) {
+            for (int i = 9; i > 0; i--) {
+                tempLog[i] = tempLog[i - 1];
+            }
+            counter = 0;
+        }
+
+        //Displays the current temperature
+        if (temp < 100) {
+            sprintf((char*)tempDisplay, "Current Temperature = %dF", temp);
+        } else if (temp >= 100) {
+            sprintf((char*)tempDisplay, "Current Temperature =%dF", temp);
+        }
+        LCDscreen.DisplayStringAt(StringX, StringY, tempDisplay, LEFT_MODE);
+
+        //Checks for touch to display log
+        LCDtouchScreen.GetState(&touchStatus);
+        if (touchStatus.touchDetected) {
+            displayLog(tempLog);
+            counter = counter + logTimer;
+            goto back;
+        }
+    }
+}
+
+/**
+  * @brief  Retrieves temperature from chip
+  * @retval Temperature
+  */
+int getTemp(void)
+{
+    char tempData[2];
+    char getTemp[1] = {0xAA};
+    char stopConvert[1] = {0x22};
+    char startConvert[1] = {0xEE};
+    int temp;
+
+    //Grabs the temperature from the DS1621, converts to F and returns value
+    //Convert tells the DS1621 to update its temperature reading
+    //Read and Write have different addresses because I2C communication address
+    //uses a 1 for write and a 0 for read at end of binary address
+    i2c.write(145, startConvert, 1, false);
+    wait(1);
+    i2c.write(145, stopConvert, 1, false);
+    i2c.write(145, getTemp, 1, false);
+    i2c.read(144, tempData, 1);
+    temp = (tempData[0] * 1.8) + 32;
+    return (temp);
+}
+
+/**
+  * @brief  Displays the temperature log
+  * @param  tempLog[10]: Array of temperature logs
+  * @retval None
+  */
+void displayLog(int tempLog[10])
+{
+    LCDscreen.SetBackColor(LCD_COLOR_BLUE);
+    LCDscreen.SetTextColor(LCD_COLOR_WHITE);
+
+    unsigned char logDisplay[500];
+    unsigned char helpDisplay2[100];
+
+    sprintf((char*)helpDisplay2, "Log is updated every %d minutes", minutesPerLog);
+
+    //Displays 10 logs, the first log is the current temperature. If the time
+    //of one log is divisible by 60 it will note that log as being one hour ago
+    //Each log is added to the master string "logDisplay"
+    LCDscreen.Clear(LCD_COLOR_BLUE);
+    sprintf((char*)logDisplay, "Log:");
+    LCDscreen.DisplayStringAt(0, 0, logDisplay, LEFT_MODE);
+    for (int i = 0; i < 10; i++) {
+        if (i == 0) {
+            sprintf((char*)logDisplay, "%dF - Current Temperature", tempLog[i]);
+        } else if (i == (60 / minutesPerLog)) {
+            sprintf((char*)logDisplay, "%d: %dF - One Hour Ago", i, tempLog[i]);
+        } else {
+            sprintf((char*)logDisplay, "%d: %dF", i, tempLog[i]);
+        }
+        LCDscreen.DisplayStringAt(0, (i + 1) * 20, logDisplay, LEFT_MODE);
+    }
+    LCDscreen.SetFont(&Font20);
+    LCDscreen.DisplayStringAt(0, 240, helpDisplay2, LEFT_MODE);
+    LCDscreen.SetFont(&Font24);
+
+    wait(logTimer);
+}
+
+/**
+  * @brief  Initializes display
+  * @retval None
+  */
+void initScreen(void)
+{
+    LCDscreen.Clear(LCD_COLOR_WHITE);
+    LCDscreen.SetBackColor(LCD_COLOR_BLUE);
+    LCDscreen.SetTextColor(LCD_COLOR_WHITE);
+    LCDscreen.SetFont(&Font24);
+    LCDscreen.Clear(LCD_COLOR_BLUE);
+}
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