dsvsv
Fork of ADXL345_I2C by
ADXL345_I2C.cpp
- Committer:
- nimbusgb
- Date:
- 2011-02-02
- Revision:
- 0:3957077e9775
File content as of revision 0:3957077e9775:
/** * @author Jose R. Padron * * @section LICENSE * * Copyright (c) 2010 ARM Limited * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @section DESCRIPTION * * ADXL345, triple axis, digital interface, accelerometer. * * Datasheet: * * http://www.analog.com/static/imported-files/data_sheets/ADXL345.pdf */ /** * Includes */ #include "ADXL345_I2C.h" ADXL345_I2C::ADXL345_I2C(PinName sda, PinName scl) : i2c_(sda,scl) { //100KHz, as specified by the datasheet. i2c_.frequency(100000); wait_us(500); } char ADXL345_I2C::getDevId(void) { return oneByteRead(ADXL345_DEVID_REG); } int ADXL345_I2C::getTapThreshold(void) { return oneByteRead(ADXL345_THRESH_TAP_REG); } void ADXL345_I2C::setTapThreshold(int threshold) { oneByteWrite(ADXL345_THRESH_TAP_REG, threshold); } int ADXL345_I2C::getOffset(int axis) { int address = 0; if (axis == ADXL345_X) { address = ADXL345_OFSX_REG; } else if (axis == ADXL345_Y) { address = ADXL345_OFSY_REG; } else if (axis == ADXL345_Z) { address = ADXL345_OFSZ_REG; } return oneByteRead(address); } void ADXL345_I2C::setOffset(int axis, char offset) { char address = 0; if (axis == ADXL345_X) { address = ADXL345_OFSX_REG; } else if (axis == ADXL345_Y) { address = ADXL345_OFSY_REG; } else if (axis == ADXL345_Z) { address = ADXL345_OFSZ_REG; } return oneByteWrite(address, offset); } int ADXL345_I2C::getTapDuration(void) { return oneByteRead(ADXL345_DUR_REG)*625; } void ADXL345_I2C::setTapDuration(int duration_us) { int tapDuration = duration_us / 625; oneByteWrite(ADXL345_DUR_REG, tapDuration); } float ADXL345_I2C::getTapLatency(void) { return oneByteRead(ADXL345_LATENT_REG)*1.25; } void ADXL345_I2C::setTapLatency(int latency_ms) { int tapLatency = latency_ms / 1.25; oneByteWrite(ADXL345_LATENT_REG, tapLatency); } float ADXL345_I2C::getWindowTime(void) { return oneByteRead(ADXL345_WINDOW_REG)*1.25; } void ADXL345_I2C::setWindowTime(int window_ms) { int windowTime = window_ms / 1.25; oneByteWrite(ADXL345_WINDOW_REG, windowTime); } int ADXL345_I2C::getActivityThreshold(void) { return oneByteRead(ADXL345_THRESH_ACT_REG); } void ADXL345_I2C::setActivityThreshold(int threshold) { oneByteWrite(ADXL345_THRESH_ACT_REG, threshold); } int ADXL345_I2C::getInactivityThreshold(void) { return oneByteRead(ADXL345_THRESH_INACT_REG); } void ADXL345_I2C::setInactivityThreshold(int threshold) { return oneByteWrite(ADXL345_THRESH_INACT_REG, threshold); } int ADXL345_I2C::getTimeInactivity(void) { return oneByteRead(ADXL345_TIME_INACT_REG); } void ADXL345_I2C::setTimeInactivity(int timeInactivity) { oneByteWrite(ADXL345_TIME_INACT_REG, timeInactivity); } int ADXL345_I2C::getActivityInactivityControl(void) { return oneByteRead(ADXL345_ACT_INACT_CTL_REG); } void ADXL345_I2C::setActivityInactivityControl(int settings) { oneByteWrite(ADXL345_ACT_INACT_CTL_REG, settings); } int ADXL345_I2C::getFreefallThreshold(void) { return oneByteRead(ADXL345_THRESH_FF_REG); } void ADXL345_I2C::setFreefallThreshold(int threshold) { oneByteWrite(ADXL345_THRESH_FF_REG, threshold); } int ADXL345_I2C::getFreefallTime(void) { return oneByteRead(ADXL345_TIME_FF_REG)*5; } void ADXL345_I2C::setFreefallTime(int freefallTime_ms) { int freefallTime = freefallTime_ms / 5; oneByteWrite(ADXL345_TIME_FF_REG, freefallTime); } int ADXL345_I2C::getTapAxisControl(void) { return oneByteRead(ADXL345_TAP_AXES_REG); } void ADXL345_I2C::setTapAxisControl(int settings) { oneByteWrite(ADXL345_TAP_AXES_REG, settings); } int ADXL345_I2C::getTapSource(void) { return oneByteRead(ADXL345_ACT_TAP_STATUS_REG); } void ADXL345_I2C::setPowerMode(char mode) { //Get the current register contents, so we don't clobber the rate value. char registerContents = oneByteRead(ADXL345_BW_RATE_REG); registerContents = (mode << 4) | registerContents; oneByteWrite(ADXL345_BW_RATE_REG, registerContents); } int ADXL345_I2C::getPowerControl(void) { return oneByteRead(ADXL345_POWER_CTL_REG); } void ADXL345_I2C::setPowerControl(int settings) { oneByteWrite(ADXL345_POWER_CTL_REG, settings); } int ADXL345_I2C::getInterruptEnableControl(void) { return oneByteRead(ADXL345_INT_ENABLE_REG); } void ADXL345_I2C::setInterruptEnableControl(int settings) { oneByteWrite(ADXL345_INT_ENABLE_REG, settings); } int ADXL345_I2C::getInterruptMappingControl(void) { return oneByteRead(ADXL345_INT_MAP_REG); } void ADXL345_I2C::setInterruptMappingControl(int settings) { oneByteWrite(ADXL345_INT_MAP_REG, settings); } int ADXL345_I2C::getInterruptSource(void){ return oneByteRead(ADXL345_INT_SOURCE_REG); } int ADXL345_I2C::getDataFormatControl(void){ return oneByteRead(ADXL345_DATA_FORMAT_REG); } void ADXL345_I2C::setDataFormatControl(int settings){ oneByteWrite(ADXL345_DATA_FORMAT_REG, settings); } void ADXL345_I2C::setDataRate(int rate) { //Get the current register contents, so we don't clobber the power bit. char registerContents = oneByteRead(ADXL345_BW_RATE_REG); registerContents &= 0x10; registerContents |= rate; oneByteWrite(ADXL345_BW_RATE_REG, registerContents); } int ADXL345_I2C::getAx(){ char buffer[2]; TwoByteRead(ADXL345_DATAX0_REG, buffer); return ((int)buffer[1] << 8 | (int)buffer[0]); } int ADXL345_I2C::getAy(){ char buffer[2]; TwoByteRead(ADXL345_DATAY0_REG, buffer); return ((int)buffer[1] << 8 | (int)buffer[0]); } int ADXL345_I2C::getAz(){ char buffer[2]; TwoByteRead(ADXL345_DATAZ0_REG, buffer); return ((int)buffer[1] << 8 | (int)buffer[0]); } void ADXL345_I2C::getOutput(int* readings){ char buffer[2]; TwoByteRead(ADXL345_DATAX0_REG, buffer); readings[0] = (int)buffer[1] << 8 | (int)buffer[0]; TwoByteRead(ADXL345_DATAY0_REG, buffer); readings[1] = (int)buffer[1] << 8 | (int)buffer[0]; TwoByteRead(ADXL345_DATAZ0_REG, buffer); readings[2] = (int)buffer[1] << 8 | (int)buffer[0]; } int ADXL345_I2C::getFifoControl(void){ return oneByteRead(ADXL345_FIFO_CTL); } void ADXL345_I2C::setFifoControl(int settings){ oneByteWrite(ADXL345_FIFO_STATUS, settings); } int ADXL345_I2C::getFifoStatus(void){ return oneByteRead(ADXL345_FIFO_STATUS); } char ADXL345_I2C::oneByteRead(char address) { char rx[1]; char tx[1]; // nCS_ = 1; tx[0]=address; i2c_.write(ADXL345_I2C_WRITE, tx,1); i2c_.read(ADXL345_I2C_READ,rx,1); //nCS_ = 0; return rx[0]; } void ADXL345_I2C::oneByteWrite(char address, char data) { // nCS_ = 1; char tx[2]; tx[0]=address; tx[1]=data; i2c_.write(ADXL345_I2C_WRITE,tx,2); //nCS_ = 0; } void ADXL345_I2C::TwoByteRead(char startAddress, char* buffer) { // nCS_ = 1; //Send address to start reading from. char tx[1]; tx[0]=startAddress; i2c_.write(ADXL345_I2C_WRITE,tx,1); i2c_.read(ADXL345_I2C_READ,buffer,2); //nCS_ = 0; } void ADXL345_I2C::TwoByteWrite(char startAddress, char* buffer) { //nCS_ = 1; //Send address to start reading from. char tx[1]; tx[0]=startAddress; i2c_.write(ADXL345_I2C_WRITE,tx,1); i2c_.write(ADXL345_I2C_WRITE,buffer,2); //nCS_ = 0; }