Diff: ADXL345_I2C.cpp
- Revision:
- 0:b61f317f452e
diff -r 000000000000 -r b61f317f452e ADXL345_I2C.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ADXL345_I2C.cpp Mon Jan 30 08:02:30 2012 +0000
@@ -0,0 +1,421 @@
+/**
+ * @author Peter Swanson
+ * A personal note from me: Jesus Christ has changed my life so much it blows my mind. I say this because
+ * today, religion is thought of as something that you do or believe and has about as
+ * little impact on a person as their political stance. But for me, God gives me daily
+ * strength and has filled my life with the satisfaction that I could never find in any
+ * of the other things that I once looked for it in.
+ * If your interested, heres verse that changed my life:
+ * Rom 8:1-3: "Therefore, there is now no condemnation for those who are in Christ Jesus,
+ * because through Christ Jesus, the law of the Spirit who gives life has set
+ * me free from the law of sin (which brings...) and death. For what the law
+ * was powerless to do in that it was weakened by the flesh, God did by sending
+ * His own Son in the likeness of sinful flesh to be a sin offering. And so He
+ * condemned sin in the flesh in order that the righteous requirements of the
+ * (God's) law might be fully met in us, who live not according to the flesh
+ * but according to the Spirit."
+ *
+ * @section LICENSE
+ *
+ * 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, I2C interface, accelerometer.
+ *
+ * Datasheet:
+ *
+ * http://www.analog.com/static/imported-files/data_sheets/ADXL345.pdf
+ */
+
+/**
+ * Includes
+ */
+#include "ADXL345_I2C.h"
+
+//#include "mbed.h"
+
+ADXL345_I2C::ADXL345_I2C(PinName sda, PinName scl) : i2c_(sda, scl) {
+
+ //400kHz, allowing us to use the fastest data rates.
+ i2c_.frequency(400000);
+// initialize the BW data rate
+ char tx[2];
+ tx[0] = ADXL345_BW_RATE_REG;
+ tx[1] = ADXL345_1600HZ; //value greater than or equal to 0x0A is written into the rate bits (Bit D3 through Bit D0) in the BW_RATE register
+ i2c_.write( ADXL345_I2C_WRITE , tx, 2);
+
+//Data format (for +-16g) - This is done by setting Bit D3 of the DATA_FORMAT register (Address 0x31) and writing a value of 0x03 to the range bits (Bit D1 and Bit D0) of the DATA_FORMAT register (Address 0x31).
+
+ char rx[2];
+ rx[0] = ADXL345_DATA_FORMAT_REG;
+ rx[1] = 0x0B;
+ // full res and +_16g
+ i2c_.write( ADXL345_I2C_WRITE , rx, 2);
+
+ // Set Offset - programmed into the OFSX, OFSY, and OFXZ registers, respectively, as 0xFD, 0x03 and 0xFE.
+ char x[2];
+ x[0] = ADXL345_OFSX_REG ;
+ x[1] = 0xFD;
+ i2c_.write( ADXL345_I2C_WRITE , x, 2);
+ char y[2];
+ y[0] = ADXL345_OFSY_REG ;
+ y[1] = 0x03;
+ i2c_.write( ADXL345_I2C_WRITE , y, 2);
+ char z[2];
+ z[0] = ADXL345_OFSZ_REG ;
+ z[1] = 0xFE;
+ i2c_.write( ADXL345_I2C_WRITE , z, 2);
+}
+
+
+char ADXL345_I2C::SingleByteRead(char address){
+ char tx = address;
+ char output;
+ i2c_.write( ADXL345_I2C_WRITE , &tx, 1); //tell it what you want to read
+ i2c_.read( ADXL345_I2C_READ , &output, 1); //tell it where to store the data
+ return output;
+
+}
+
+
+/*
+***info on the i2c_.write***
+address 8-bit I2C slave address [ addr | 0 ]
+data Pointer to the byte-array data to send
+length Number of bytes to send
+repeated Repeated start, true - do not send stop at end
+returns 0 on success (ack), or non-0 on failure (nack)
+*/
+
+int ADXL345_I2C::SingleByteWrite(char address, char data){
+ int ack = 0;
+ char tx[2];
+ tx[0] = address;
+ tx[1] = data;
+ return ack | i2c_.write( ADXL345_I2C_WRITE , tx, 2);
+}
+
+
+
+void ADXL345_I2C::multiByteRead(char address, char* output, int size) {
+ i2c_.write( ADXL345_I2C_WRITE, &address, 1); //tell it where to read from
+ i2c_.read( ADXL345_I2C_READ , output, size); //tell it where to store the data read
+}
+
+
+int ADXL345_I2C::multiByteWrite(char address, char* ptr_data, int size) {
+ int ack;
+
+ ack = i2c_.write( ADXL345_I2C_WRITE, &address, 1); //tell it where to write to
+ return ack | i2c_.write( ADXL345_I2C_READ, ptr_data, size); //tell it what data to write
+
+}
+
+
+void ADXL345_I2C::getOutput(int* readings){
+ char buffer[6];
+ multiByteRead(ADXL345_DATAX0_REG, buffer, 6);
+
+ readings[0] = (int)buffer[1] << 8 | (int)buffer[0];
+ readings[1] = (int)buffer[3] << 8 | (int)buffer[2];
+ readings[2] = (int)buffer[5] << 8 | (int)buffer[4];
+
+}
+
+
+
+char ADXL345_I2C::getDeviceID() {
+ return SingleByteRead(ADXL345_DEVID_REG);
+ }
+//
+int ADXL345_I2C::setPowerMode(char mode) {
+
+ //Get the current register contents, so we don't clobber the rate value.
+ char registerContents = (mode << 4) | SingleByteRead(ADXL345_BW_RATE_REG);
+
+ return SingleByteWrite(ADXL345_BW_RATE_REG, registerContents);
+
+}
+
+char ADXL345_I2C::getPowerControl() {
+ return SingleByteRead(ADXL345_POWER_CTL_REG);
+}
+
+int ADXL345_I2C::setPowerControl(char settings) {
+ return SingleByteWrite(ADXL345_POWER_CTL_REG, settings);
+
+}
+
+
+
+char ADXL345_I2C::getDataFormatControl(void){
+
+ return SingleByteRead(ADXL345_DATA_FORMAT_REG);
+}
+
+int ADXL345_I2C::setDataFormatControl(char settings){
+
+ return SingleByteWrite(ADXL345_DATA_FORMAT_REG, settings);
+
+}
+
+int ADXL345_I2C::setDataRate(char rate) {
+
+ //Get the current register contents, so we don't clobber the power bit.
+ char registerContents = SingleByteRead(ADXL345_BW_RATE_REG);
+
+ registerContents &= 0x10;
+ registerContents |= rate;
+
+ return SingleByteWrite(ADXL345_BW_RATE_REG, registerContents);
+
+}
+
+
+char ADXL345_I2C::getOffset(char axis) {
+
+ 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 SingleByteRead(address);
+}
+
+int ADXL345_I2C::setOffset(char 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 SingleByteWrite(address, offset);
+
+}
+
+
+char ADXL345_I2C::getFifoControl(void){
+
+ return SingleByteRead(ADXL345_FIFO_CTL);
+
+}
+
+int ADXL345_I2C::setFifoControl(char settings){
+ return SingleByteWrite(ADXL345_FIFO_STATUS, settings);
+
+}
+
+char ADXL345_I2C::getFifoStatus(void){
+
+ return SingleByteRead(ADXL345_FIFO_STATUS);
+
+}
+
+
+
+char ADXL345_I2C::getTapThreshold(void) {
+
+ return SingleByteRead(ADXL345_THRESH_TAP_REG);
+}
+
+int ADXL345_I2C::setTapThreshold(char threshold) {
+
+ return SingleByteWrite(ADXL345_THRESH_TAP_REG, threshold);
+
+}
+
+
+float ADXL345_I2C::getTapDuration(void) {
+
+ return (float)SingleByteRead(ADXL345_DUR_REG)*625;
+}
+
+int ADXL345_I2C::setTapDuration(short int duration_us) {
+
+ short int tapDuration = duration_us / 625;
+ char tapChar[2];
+ tapChar[0] = (tapDuration & 0x00FF);
+ tapChar[1] = (tapDuration >> 8) & 0x00FF;
+ return multiByteWrite(ADXL345_DUR_REG, tapChar, 2);
+
+}
+
+float ADXL345_I2C::getTapLatency(void) {
+
+ return (float)SingleByteRead(ADXL345_LATENT_REG)*1.25;
+}
+
+int ADXL345_I2C::setTapLatency(short int latency_ms) {
+
+ latency_ms = latency_ms / 1.25;
+ char latChar[2];
+ latChar[0] = (latency_ms & 0x00FF);
+ latChar[1] = (latency_ms << 8) & 0xFF00;
+ return multiByteWrite(ADXL345_LATENT_REG, latChar, 2);
+
+}
+
+float ADXL345_I2C::getWindowTime(void) {
+
+ return (float)SingleByteRead(ADXL345_WINDOW_REG)*1.25;
+}
+
+int ADXL345_I2C::setWindowTime(short int window_ms) {
+
+ window_ms = window_ms / 1.25;
+ char windowChar[2];
+ windowChar[0] = (window_ms & 0x00FF);
+ windowChar[1] = ((window_ms << 8) & 0xFF00);
+ return multiByteWrite(ADXL345_WINDOW_REG, windowChar, 2);
+
+}
+
+char ADXL345_I2C::getActivityThreshold(void) {
+
+ return SingleByteRead(ADXL345_THRESH_ACT_REG);
+}
+
+int ADXL345_I2C::setActivityThreshold(char threshold) {
+ return SingleByteWrite(ADXL345_THRESH_ACT_REG, threshold);
+
+}
+
+char ADXL345_I2C::getInactivityThreshold(void) {
+ return SingleByteRead(ADXL345_THRESH_INACT_REG);
+
+}
+
+//int FUNCTION(short int * ptr_Output)
+//short int FUNCTION ()
+
+int ADXL345_I2C::setInactivityThreshold(char threshold) {
+ return SingleByteWrite(ADXL345_THRESH_INACT_REG, threshold);
+
+}
+
+char ADXL345_I2C::getTimeInactivity(void) {
+
+ return SingleByteRead(ADXL345_TIME_INACT_REG);
+
+}
+
+int ADXL345_I2C::setTimeInactivity(char timeInactivity) {
+ return SingleByteWrite(ADXL345_TIME_INACT_REG, timeInactivity);
+
+}
+
+char ADXL345_I2C::getActivityInactivityControl(void) {
+
+ return SingleByteRead(ADXL345_ACT_INACT_CTL_REG);
+
+}
+
+int ADXL345_I2C::setActivityInactivityControl(char settings) {
+ return SingleByteWrite(ADXL345_ACT_INACT_CTL_REG, settings);
+
+}
+
+char ADXL345_I2C::getFreefallThreshold(void) {
+
+ return SingleByteRead(ADXL345_THRESH_FF_REG);
+
+}
+
+int ADXL345_I2C::setFreefallThreshold(char threshold) {
+ return SingleByteWrite(ADXL345_THRESH_FF_REG, threshold);
+
+}
+
+char ADXL345_I2C::getFreefallTime(void) {
+
+ return SingleByteRead(ADXL345_TIME_FF_REG)*5;
+
+}
+
+int ADXL345_I2C::setFreefallTime(short int freefallTime_ms) {
+ freefallTime_ms = freefallTime_ms / 5;
+ char fallChar[2];
+ fallChar[0] = (freefallTime_ms & 0x00FF);
+ fallChar[1] = (freefallTime_ms << 8) & 0xFF00;
+
+ return multiByteWrite(ADXL345_TIME_FF_REG, fallChar, 2);
+
+}
+
+char ADXL345_I2C::getTapAxisControl(void) {
+
+ return SingleByteRead(ADXL345_TAP_AXES_REG);
+
+}
+
+int ADXL345_I2C::setTapAxisControl(char settings) {
+ return SingleByteWrite(ADXL345_TAP_AXES_REG, settings);
+
+}
+
+char ADXL345_I2C::getTapSource(void) {
+
+ return SingleByteRead(ADXL345_ACT_TAP_STATUS_REG);
+
+}
+
+
+
+char ADXL345_I2C::getInterruptEnableControl(void) {
+
+ return SingleByteRead(ADXL345_INT_ENABLE_REG);
+
+}
+
+int ADXL345_I2C::setInterruptEnableControl(char settings) {
+ return SingleByteWrite(ADXL345_INT_ENABLE_REG, settings);
+
+}
+
+char ADXL345_I2C::getInterruptMappingControl(void) {
+
+ return SingleByteRead(ADXL345_INT_MAP_REG);
+
+}
+
+int ADXL345_I2C::setInterruptMappingControl(char settings) {
+ return SingleByteWrite(ADXL345_INT_MAP_REG, settings);
+
+}
+
+char ADXL345_I2C::getInterruptSource(void){
+
+ return SingleByteRead(ADXL345_INT_SOURCE_REG);
+
+}
+
+
+
+
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