Diff: KL46z_double_tap.cpp

Revision:

13:24d44a0a1307

Parent:

12:4774c4fc718e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/KL46z_double_tap.cpp	Wed Mar 15 16:50:28 2017 +0000
@@ -0,0 +1,175 @@
+#include "mbed.h"
+#include "MMA8451Q8g.h"
+#include "SLCD.h"
+#define PROGNAME "KBrat-SSD645-Midterm_Part2\r\n"
+
+#define BLINKTIME   1.5
+#define RELAYON     0
+#define RELAYOFF    1
+#define LEDDELAY    0.4
+#define WAITDELAY   0.7
+#define LCDLEN      10
+
+#define REG_WHO_AM_I      0x0D
+#define XYZ_DATA_CFG      0x0E
+
+#define REG_OUT_X_MSB     0x01
+#define REG_OUT_Y_MSB     0x03
+#define REG_OUT_Z_MSB     0x05
+#define REG_PULSE_CFG     0x21
+#define REG_PULSE_SRC     0x22//Pulse Source Register
+#define REG_PULSE_THSZ    0x25//Threshold on z axis
+#define REG_PULSE_TMLT    0x26
+#define REG_CTRL_4        0x2D
+#define REG_CTRL_5        0x2E
+
+#define MAX_2G            0x00
+#define MAX_4G            0x01
+#define MAX_8G            0x02
+//#define SET_INTERRUPT     0x08 //using interrupt INT1 PTC5
+#define SET_INTERRUPT     0x08 //using interrupt INT2 PTD1
+#define SET_INT_LINE      0x00
+//#define SET_THZ           0x20 
+//#define SET_TMLT          0x18 
+#define SET_THZ           0x28 //See Table 49 in data sheet
+/***********
+0b0010 1000
+2.5g/0.063g/count = 40 counts
+************/
+#define SET_TMLT          0x1C//0x1C//0x38 // See Table 51 in data sheet
+/******
+0b0001 1100
+28 = 0x1C
+Time step at 400Hz ODR = 1.25ms
+28x1.25 = 35 ms
+******/
+
+
+
+//#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)
+ 
+Ticker ledBlink; // timinginterrupt for RED led
+//InterruptIn MMA8451QInt1(PTC5);  //push button with internal pullup //INT1
+InterruptIn MMA8451QInt2(PTD1);//push button with internal pullup //INT2
+DigitalOut myled(LED_RED); // red led
+DigitalOut relay(LED_GREEN); // green led
+Serial pc(USBTX, USBRX);
+
+ MMA8451Q acc(SDA, SCL, MMA8451_I2C_ADDRESS);
+ 
+float delay = WAITDELAY;
+int relayState = RELAYOFF;
+int outState = false;
+SLCD slcd; //define LCD display
+char LCDMessages[2][LCDLEN] = {"TRUE", "FALS"};
+
+
+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);
+} 
+
+// Interrupt routines
+void LEDBlinker(){  // RED LED interrupt
+    outState = !outState; 
+    myled.write(outState);
+}
+
+void GreenLEDBlinker(){  // Green LED interrupt
+    //uint8_t i_regData; 
+    relayState = !relayState; 
+    relay.write(relayState);
+    //acc.readRegs(REG_PULSE_SRC, &i_regData, 1); // Clear the tap event
+}        
+
+// end interrupt routines
+
+int main()
+{
+    pc.printf(PROGNAME);
+    //pc.printf("REG_CTRL_4: 0x%2x\r\n", REG_CTRL_4);
+    //pc.printf("REG_CTRL_5: 0x%2x\r\n", REG_CTRL_5);
+    uint8_t regData; 
+    uint8_t latchData = 0x40; //0b01000000; //for pulse config register
+    uint8_t axisData = 0x10; //0b00010000;
+
+    char lcdData[LCDLEN];
+    
+    myled.write(outState);
+    relay.write(relayState);
+    
+// set up interrupts to be used later for taps
+    MMA8451QInt2.rise(&GreenLEDBlinker);
+    MMA8451QInt2.mode(PullNone); 
+   
+// set up interrupts to be used later for taps
+    ledBlink.attach(&LEDBlinker, LEDDELAY);
+  
+// Read Pulse Source Data and check to see if things have been set
+    acc.readRegs(REG_PULSE_CFG, &regData, 1);  // check it
+    sprintf (lcdData,"%x",regData);
+    LCDMess(lcdData,BLINKTIME); 
+    
+// *********** Initialize for tap recognition ***********      
+    regData = latchData | axisData;
+    acc.setRegisterInStandby(REG_PULSE_CFG, regData); // write the data
+    acc.readRegs(REG_PULSE_CFG, &regData, 1);  // check it
+    sprintf (lcdData,"%x",regData);
+    LCDMess(lcdData,BLINKTIME);     
+    
+// Check to see if accerlometer is alive and well
+    acc.setGLimit(MAX_4G); // For now set to 2g
+    acc.readRegs(XYZ_DATA_CFG, &regData, 1);
+    sprintf (lcdData,"%x",regData); // Note displaying in hexidecimal
+    LCDMess(lcdData,BLINKTIME);
+    
+// Setup single-tap pulse prarameters.
+   acc.setRegisterInStandby(REG_PULSE_THSZ, SET_THZ); // write the data
+   acc.setRegisterInStandby(REG_PULSE_TMLT, SET_TMLT); // write the data 
+      
+// Set up (pulse) interrupt to INT2 pin
+    acc.setRegisterInStandby(REG_CTRL_4, SET_INTERRUPT); // write the data
+    acc.setRegisterInStandby(REG_CTRL_5, SET_INT_LINE); // write the data
+    
+    pc.printf("REG_CTRL_4: 0x%2x\r\n", REG_CTRL_4);
+    pc.printf("REG_CTRL_5: 0x%2x\r\n", REG_CTRL_5);
+    pc.printf("REG_PULSE_SRC: 0x%2x\r\n", REG_PULSE_SRC);
+    pc.printf("REG_PULSE_TMLT: 0x%2x\r\n", REG_PULSE_TMLT);
+    pc.printf("SET_THZ: 0x%2x\r\n", SET_THZ);
+    pc.printf("SET_TMLT: 0x%2x\r\n", SET_TMLT);
+    pc.printf("SET_INTERRUPT: 0x%2x\r\n", SET_INTERRUPT);
+    pc.printf("SET_INT_LINE: 0x%2x\r\n", SET_INT_LINE);
+// End or setup    
+
+    acc.readRegs(REG_WHO_AM_I, &regData, 1);
+    sprintf (lcdData,"%x",regData);
+    LCDMess(lcdData,BLINKTIME); 
+  
+    
+    while (true) { 
+        acc.readRegs(REG_PULSE_SRC, &regData, 1);
+        sprintf (lcdData,"%x",regData);
+        LCDMess(lcdData,BLINKTIME);           
+        LCDMessNoDwell(LCDMessages[relayState]);  
+        wait(delay);
+    }
+}
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