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
Diff: MMA845x.cpp
- Revision:
- 5:d662a7003b6f
- Parent:
- 4:4ff1650da84c
--- a/MMA845x.cpp Mon Oct 17 08:38:38 2016 -0500 +++ b/MMA845x.cpp Wed Jan 31 10:02:14 2018 -0600 @@ -50,7 +50,6 @@ uint8_t i = 0; char reg_val[1]; - _i2c->frequency(100000); _who_am_i = 0x00; // Reset all registers to POR values @@ -290,8 +289,8 @@ result |= _i2c->write(_i2c_addr, buf, 2); - if(result != 0) { - debug("MMA845x:writeRegister failed r-%d\n\r",result); + if (result != 0) { + debug("MMA845x::writeRegister failed r-%d\n\r",result); } return result; @@ -303,18 +302,23 @@ char reg_out[1]; reg_out[0] = reg; + _i2c->lock(); + + // MMA8451Q expects a repeated start from the master result |= _i2c->write(_i2c_addr,reg_out,1,true); - if(result != 0) { + if (result != 0) { debug("MMA845x::readRegister failed write r- %d\n\r", result); - return result; + goto exit; } result |= _i2c->read(_i2c_addr,data,count,false); - if(result != 0) { + if (result != 0) { debug("MMA845x::readRegister failed read r-%d\n\r",result); } +exit: + _i2c->unlock(); return result; }