Diff: lcd_acc_46_v3.cpp

Revision:

0:88ddbd76b455

Child:

1:6c2ec7b0e1c9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lcd_acc_46_v3.cpp	Sun Nov 30 00:08:36 2014 +0000
@@ -0,0 +1,174 @@
+#include "mbed.h"
+#include "MMA8451Q.h"
+#include "SLCD.h"
+/* 
+Test of the accelerometer, digital I/O, on-board LCD screen, and 16-bit ADC.
+ Looing at vector product of the x-y components of the accelerometer.
+ Works pretty well. Still rough, program wise - sc 140710
+ Addiing touch sensor to replace potentiometer.
+ Show x and y components 
+ */
+
+#define BLINKTIME 0.5
+#define DATATIME 0.1
+#define NUMLEDS 2
+#define LEDON 0
+#define LEDOFF 1
+#define SCALING 13
+#define RSTARTMESS "RSET"
+#define MAXVECT "MAXV"
+#define YCOMP "YCMP"
+#define ANALTOVOLTS 3.3
+#define LEDDELAY 0.400
+
+#define PROGNAME "LCD_ACC_LCDv3 46\r/n"
+
+//#define PRINTDBUG
+// Accelerometer SPI pins
+#if   defined (TARGET_KL25Z) || defined (TARGET_KL46Z)
+  PinName const SDA = PTE25;
+  PinName const SCL = PTE24;
+#elif defined (TARGET_KL05Z)
+  PinName const SDA = PTB4;
+  PinName const SCL = PTB3;
+#else
+  #error TARGET NOT DEFINED
+#endif
+
+#define MMA8451_I2C_ADDRESS (0x1d<<1)
+
+SLCD slcd; //define LCD display
+Timer blinkTimer;
+Timer dataTimer;
+Timer displayTimer;
+MMA8451Q acc(SDA, SCL, MMA8451_I2C_ADDRESS);
+AnalogIn TMP01(PTB1);
+DigitalOut LEDs[NUMLEDS]={LED_RED, LED_GREEN}; //Indicator LEDs
+Serial pc(USBTX, USBRX);
+
+
+void LCDMess(char *lMess, float dWait){
+        slcd.Home();
+        slcd.clear();
+        slcd.printf(lMess);
+        wait(dWait);
+} 
+void LCDMessNoDwell(char *lMess){
+        slcd.Home();
+        slcd.clear();
+        slcd.printf(lMess);
+} 
+void GetOffsets(float *xo, float *yo){
+    LCDMess(RSTARTMESS, BLINKTIME);
+    *xo = acc.getAccX();
+    *yo = acc.getAccY();
+    return;
+}
+
+  
+void allLEDsOFF(int numberOfLEDS) {
+    int i;
+    for (i=0;i<numberOfLEDS; i++){
+            LEDs[i] = LEDOFF;
+        }
+
+}
+
+void runLEDs(int numberOfLEDS) {
+    int i;
+    for (i=0;i<numberOfLEDS; i++){
+            LEDs[i] = LEDON;
+            wait(0.2);
+        }
+   allLEDsOFF(numberOfLEDS);     
+}
+
+
+
+int main() {
+    
+    int RButtonState;
+    int LButtonState;
+    DigitalIn RtButton(PTC12);
+    DigitalIn LftButton(PTC3);
+    float xOffset;
+    float yOffset;
+    int displayState = true; 
+    float xAcc;
+    float yAcc;
+    float zAcc;
+    float vector;
+    float vMax = 0.0;
+    int DisplayTime = DATATIME;
+    int outState = false;
+    char lcdData[10]; //buffer needs places dor decimal pt and colon
+
+    
+#ifdef PRINTDBUG
+        pc.printf(PROGNAME);
+#endif
+// Initialze readings and sequence the LED's for dramtic effect.
+    allLEDsOFF(NUMLEDS);
+    GetOffsets(&xOffset, &yOffset); 
+//    runLEDs(NUMLEDS);
+    blinkTimer.start();
+    blinkTimer.reset();
+    
+// main loop forever 
+    while(true) {
+// Alive LEDs
+        while(blinkTimer.read()> LEDDELAY) {     
+            LEDs[0].write(outState);
+            LEDs[1].write(!outState);
+            outState = !outState; 
+            blinkTimer.reset();
+        }
+// Handle user input for display selections
+        RButtonState = !RtButton; // button is pulled up so false is when button is pushed it's inverted to avoid confusion downstream
+        if (RButtonState){
+            vMax = 0.0; // Clear vMax
+            GetOffsets(&xOffset, &yOffset); // set zero baseling for position 
+#ifdef PRINTDBUG
+            pc.printf("xOffset = %f\r\n", xOffset);
+            pc.printf("yOffset = %f\r\n", yOffset);
+#endif           
+        }
+        LButtonState = !LftButton;
+        if (LButtonState) {  //Change data that is displayed
+            displayState = !displayState;
+            // Change to switch/case soon.
+            if (displayState) {
+                LCDMess(YCOMP,BLINKTIME);
+            }else {
+                LCDMess(MAXVECT,BLINKTIME);
+            }
+        }
+        //while (dataTimer.read() > DATATIME){
+//Get accelerometer data - tilt angles minus offset for zero mark.
+// No offset
+            xAcc = abs(acc.getAccX());
+            yAcc = abs(acc.getAccY());
+            zAcc = abs(acc.getAccZ());
+ // Calulate vector sum of x,y and z reading.       
+            vector = sqrt(pow(xAcc,2) + pow(yAcc,2)+ pow(zAcc,2));
+            if (vector > vMax) {
+                vMax = vector;
+            }
+            wait(DATATIME);
+#ifdef PRINTDBUG
+        pc.printf("vector = %f\r\n",  yAcc);
+        pc.printf("scaling = %f\r\n", scaleExpansion);
+        pc.printf("RawTemp = %f\r\n", FDeg);
+#endif
+// Display the appropriate data on the LCD based upon what mode was chosen
+        
+            if (displayState) {
+                sprintf (lcdData,"%4.3f",yAcc);
+            }else {
+                sprintf (lcdData,"%4.3f",vMax);
+            }
+            DisplayTime = BLINKTIME;
+            LCDMess(lcdData,DisplayTime);
+// Wait then do the whole thing again.   
+    }//forever loop
+}// main
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