Shane Barton / Mbed 2 deprecated sbart_KL46z_double_tap_2017

SB-Midterm-part2

Dependencies:   MMA8451Q8b SLCD mbed

Fork of KL46z_single_tap_2017 by Stanley Cohen

Files at this revision

API Documentation at this revision

Revision 14:a7cf32971254, committed 2017-03-15

Comitter:
sbart
Date:
Wed Mar 15 05:39:48 2017 +0000
Parent:
13:71be063390b1
Commit message:
-

Changed in this revision

KL46z_double_tap_2017..cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/KL46z_double_tap_2017..cpp	Wed Mar 15 05:27:46 2017 +0000
+++ b/KL46z_double_tap_2017..cpp	Wed Mar 15 05:39:48 2017 +0000
@@ -32,7 +32,7 @@
 #define MAX_8G            0x02
 #define SET_INTERRUPT     0x08 //SB - enable pulse interrupt
 #define SET_INT_LINE      0x00  //SB - set to INT2
-#define SET_THZ           0x28 //  See Table 49 in data sheet
+#define SET_THZ           0x28 //SB - 2.5g/0.063g/count = 40 counts
 
 #define SET_LTCY          0x1C //SB - Set pulse latency to 35 ms (28 * 1.25ms)
 
@@ -65,8 +65,10 @@
 #define MMA8451_I2C_ADDRESS (0x1d<<1)
  
 Ticker ledBlink; // timinginterrupt for RED led
+
 //SB - change interrupt pin address
 InterruptIn MMA8451QInt1(PTD1);  //push botton with internal pullup
+
 DigitalOut myled(LED_RED); // red led
 DigitalOut relay(LED_GREEN); // green led
 
@@ -156,6 +158,7 @@
     pc.printf("%2X", REG_1_OR_MASK);
     pc.printf("\n");
     
+    //SB - Set up the ODR to 400Hz using masks to clear and preserve the bits
     acc.readRegs(REG_CTRL_1, &regData, 1);
     
     regData = regData & REG_1_AND_MASK; //SB - clear needed bits while preserving others