Class Module for MMA845x I2C Accelerometer.

Dependents:   mDotEVBM2X MTDOT-EVBDemo-DRH MTDOT-BOX-EVB-Factory-Firmware-LIB-108 MTDOT-UDKDemo_Senet ... more

Fork of MMA845x by Sam Grove

Revision:
3:7c2fbf79f607
Parent:
2:70df6adad015
Child:
4:4ff1650da84c
--- a/MMA845x.cpp	Wed Oct 28 17:48:15 2015 +0000
+++ b/MMA845x.cpp	Mon Dec 21 10:49:15 2015 -0600
@@ -50,7 +50,9 @@
     uint8_t i = 0;
     char reg_val[1];
 
+    __disable_irq();
     _i2c->frequency(100000);
+    __enable_irq();
     _who_am_i = 0x00;
 
     // Reset all registers to POR values
@@ -288,9 +290,9 @@
     buf[0] = reg;
     buf[1] = data;
 
-//    __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
+    __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
     result |= _i2c->write(_i2c_addr, buf, 2);
-//    __enable_irq();  // Just need to block during the transaction
+    __enable_irq();  // Just need to block during the transaction
 
     if(result != 0) {
         debug("MMA845x:writeRegister failed r-%d\n\r",result);
@@ -305,18 +307,18 @@
     char reg_out[1];
 
     reg_out[0] = reg;
-//   __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
+   __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
     result |= _i2c->write(_i2c_addr,reg_out,1,true);
-//   __enable_irq();  // Just need to block during the transaction
+   __enable_irq();  // Just need to block during the transaction
 
     if(result != 0) {
         debug("MMA845x::readRegister failed write r- %d\n\r", result);
         return result;
     }
 
-//   __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
+   __disable_irq(); // Tickers and other timebase events can jack up the I2C bus for some devices
     result |= _i2c->read(_i2c_addr,data,count,false);
-//    __enable_irq();  // Just need to block during the transaction
+    __enable_irq();  // Just need to block during the transaction
 
     if(result != 0) {
         debug("MMA845x::readRegister failed read r-%d\n\r",result);