mirror of https://github.com/ArduPilot/ardupilot
BMP085 fix line endings
This commit is contained in:
parent
7b51a2c42a
commit
917418994d
|
@ -1,57 +1,57 @@
|
|||
/*
|
||||
APM_BMP085.cpp - Arduino Library for BMP085 absolute pressure sensor
|
||||
Code by Jordi Mu<EFBFBD>oz and Jose Julio. DIYDrones.com
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
Sensor is conected to I2C port
|
||||
Sensor End of Conversion (EOC) pin is PC7 (30)
|
||||
|
||||
Variables:
|
||||
RawTemp : Raw temperature data
|
||||
RawPress : Raw pressure data
|
||||
|
||||
Temp : Calculated temperature (in 0.1<EFBFBD>C units)
|
||||
Press : Calculated pressure (in Pa units)
|
||||
|
||||
Methods:
|
||||
Init() : Initialization of I2C and read sensor calibration data
|
||||
Read() : Read sensor data and calculate Temperature and Pressure
|
||||
This function is optimized so the main host don<EFBFBD>t need to wait
|
||||
You can call this function in your main loop
|
||||
It returns a 1 if there are new data.
|
||||
|
||||
Internal functions:
|
||||
Command_ReadTemp(): Send commando to read temperature
|
||||
Command_ReadPress(): Send commando to read Pressure
|
||||
ReadTemp() : Read temp register
|
||||
ReadPress() : Read press register
|
||||
Calculate() : Calculate Temperature and Pressure in real units
|
||||
|
||||
|
||||
*/
|
||||
/*
|
||||
APM_BMP085.cpp - Arduino Library for BMP085 absolute pressure sensor
|
||||
Code by Jordi Mu<EFBFBD>oz and Jose Julio. DIYDrones.com
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
Sensor is conected to I2C port
|
||||
Sensor End of Conversion (EOC) pin is PC7 (30)
|
||||
|
||||
Variables:
|
||||
RawTemp : Raw temperature data
|
||||
RawPress : Raw pressure data
|
||||
|
||||
Temp : Calculated temperature (in 0.1<EFBFBD>C units)
|
||||
Press : Calculated pressure (in Pa units)
|
||||
|
||||
Methods:
|
||||
Init() : Initialization of I2C and read sensor calibration data
|
||||
Read() : Read sensor data and calculate Temperature and Pressure
|
||||
This function is optimized so the main host don<EFBFBD>t need to wait
|
||||
You can call this function in your main loop
|
||||
It returns a 1 if there are new data.
|
||||
|
||||
Internal functions:
|
||||
Command_ReadTemp(): Send commando to read temperature
|
||||
Command_ReadPress(): Send commando to read Pressure
|
||||
ReadTemp() : Read temp register
|
||||
ReadPress() : Read press register
|
||||
Calculate() : Calculate Temperature and Pressure in real units
|
||||
|
||||
|
||||
*/
|
||||
|
||||
extern "C" {
|
||||
// AVR LibC Includes
|
||||
#include <inttypes.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include "WConstants.h"
|
||||
}
|
||||
|
||||
#include <Wire.h>
|
||||
#include "APM_BMP085.h"
|
||||
|
||||
#define BMP085_ADDRESS 0x77 //(0xEE >> 1)
|
||||
#define BMP085_EOC 30 // End of conversion pin PC7
|
||||
|
||||
// Constructors ////////////////////////////////////////////////////////////////
|
||||
//APM_BMP085_Class::APM_BMP085_Class()
|
||||
//{
|
||||
//}
|
||||
|
||||
extern "C" {
|
||||
// AVR LibC Includes
|
||||
#include <inttypes.h>
|
||||
#include <avr/interrupt.h>
|
||||
#include "WConstants.h"
|
||||
}
|
||||
|
||||
#include <Wire.h>
|
||||
#include "APM_BMP085.h"
|
||||
|
||||
#define BMP085_ADDRESS 0x77 //(0xEE >> 1)
|
||||
#define BMP085_EOC 30 // End of conversion pin PC7
|
||||
|
||||
// Constructors ////////////////////////////////////////////////////////////////
|
||||
//APM_BMP085_Class::APM_BMP085_Class()
|
||||
//{
|
||||
//}
|
||||
|
||||
// the apm2 hardware needs to check the state of the
|
||||
// chip using a direct IO port
|
||||
// On APM2 prerelease hw, the data ready port is hooked up to PE7, which
|
||||
|
@ -59,271 +59,271 @@ extern "C" {
|
|||
#define BMP_DATA_READY() (_apm2_hardware?(PINE&0x80):digitalRead(BMP085_EOC))
|
||||
|
||||
|
||||
// Public Methods //////////////////////////////////////////////////////////////
|
||||
// Public Methods //////////////////////////////////////////////////////////////
|
||||
bool APM_BMP085_Class::Init(int initialiseWireLib, bool apm2_hardware)
|
||||
{
|
||||
byte buff[22];
|
||||
int i = 0;
|
||||
|
||||
{
|
||||
byte buff[22];
|
||||
int i = 0;
|
||||
|
||||
_apm2_hardware = apm2_hardware;
|
||||
|
||||
pinMode(BMP085_EOC, INPUT); // End Of Conversion (PC7) input
|
||||
|
||||
if( initialiseWireLib != 0 )
|
||||
Wire.begin();
|
||||
|
||||
oss = 3; // Over Sampling setting 3 = High resolution
|
||||
BMP085_State = 0; // Initial state
|
||||
|
||||
// We read the calibration data registers
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xAA);
|
||||
pinMode(BMP085_EOC, INPUT); // End Of Conversion (PC7) input
|
||||
|
||||
if( initialiseWireLib != 0 )
|
||||
Wire.begin();
|
||||
|
||||
oss = 3; // Over Sampling setting 3 = High resolution
|
||||
BMP085_State = 0; // Initial state
|
||||
|
||||
// We read the calibration data registers
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xAA);
|
||||
if (Wire.endTransmission() != 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
Wire.requestFrom(BMP085_ADDRESS, 22);
|
||||
|
||||
//Wire.endTransmission();
|
||||
while(Wire.available()){
|
||||
buff[i] = Wire.receive(); // receive one byte
|
||||
i++;
|
||||
}
|
||||
|
||||
Wire.requestFrom(BMP085_ADDRESS, 22);
|
||||
|
||||
//Wire.endTransmission();
|
||||
while(Wire.available()){
|
||||
buff[i] = Wire.receive(); // receive one byte
|
||||
i++;
|
||||
}
|
||||
if (i != 22) {
|
||||
return false;
|
||||
}
|
||||
|
||||
ac1 = ((int)buff[0] << 8) | buff[1];
|
||||
ac2 = ((int)buff[2] << 8) | buff[3];
|
||||
ac3 = ((int)buff[4] << 8) | buff[5];
|
||||
ac4 = ((int)buff[6] << 8) | buff[7];
|
||||
ac5 = ((int)buff[8] << 8) | buff[9];
|
||||
ac6 = ((int)buff[10] << 8) | buff[11];
|
||||
b1 = ((int)buff[12] << 8) | buff[13];
|
||||
b2 = ((int)buff[14] << 8) | buff[15];
|
||||
mb = ((int)buff[16] << 8) | buff[17];
|
||||
mc = ((int)buff[18] << 8) | buff[19];
|
||||
md = ((int)buff[20] << 8) | buff[21];
|
||||
|
||||
//Send a command to read Temp
|
||||
Command_ReadTemp();
|
||||
BMP085_State = 1;
|
||||
|
||||
ac1 = ((int)buff[0] << 8) | buff[1];
|
||||
ac2 = ((int)buff[2] << 8) | buff[3];
|
||||
ac3 = ((int)buff[4] << 8) | buff[5];
|
||||
ac4 = ((int)buff[6] << 8) | buff[7];
|
||||
ac5 = ((int)buff[8] << 8) | buff[9];
|
||||
ac6 = ((int)buff[10] << 8) | buff[11];
|
||||
b1 = ((int)buff[12] << 8) | buff[13];
|
||||
b2 = ((int)buff[14] << 8) | buff[15];
|
||||
mb = ((int)buff[16] << 8) | buff[17];
|
||||
mc = ((int)buff[18] << 8) | buff[19];
|
||||
md = ((int)buff[20] << 8) | buff[21];
|
||||
|
||||
//Send a command to read Temp
|
||||
Command_ReadTemp();
|
||||
BMP085_State = 1;
|
||||
return true;
|
||||
}
|
||||
|
||||
/*
|
||||
// Read the sensor. This is a state machine
|
||||
// We read one time Temperature (state=1) and then 4 times Pressure (states 2-5)
|
||||
uint8_t APM_BMP085_Class::Read()
|
||||
{
|
||||
uint8_t result = 0;
|
||||
|
||||
if (BMP085_State == 1){
|
||||
if (BMP_DATA_READY()) {
|
||||
ReadTemp(); // On state 1 we read temp
|
||||
BMP085_State++;
|
||||
Command_ReadPress();
|
||||
}
|
||||
}else{
|
||||
if (BMP085_State == 5){
|
||||
if (BMP_DATA_READY()){
|
||||
ReadPress();
|
||||
Calculate();
|
||||
|
||||
BMP085_State = 1; // Start again from state = 1
|
||||
Command_ReadTemp(); // Read Temp
|
||||
result = 1; // New pressure reading
|
||||
}
|
||||
}else{
|
||||
if (BMP_DATA_READY()){
|
||||
ReadPress();
|
||||
Calculate();
|
||||
BMP085_State++;
|
||||
Command_ReadPress();
|
||||
result = 1; // New pressure reading
|
||||
}
|
||||
}
|
||||
}
|
||||
return(result);
|
||||
}
|
||||
*/
|
||||
// Read the sensor. This is a state machine
|
||||
// We read one time Temperature (state=1) and then 4 times Pressure (states 2-5)
|
||||
uint8_t APM_BMP085_Class::Read()
|
||||
{
|
||||
uint8_t result = 0;
|
||||
|
||||
if (BMP085_State == 1){
|
||||
if (BMP_DATA_READY()){
|
||||
BMP085_State = 2;
|
||||
ReadTemp(); // On state 1 we read temp
|
||||
Command_ReadPress();
|
||||
}
|
||||
}else{
|
||||
if (BMP_DATA_READY()){
|
||||
BMP085_State = 1; // Start again from state = 1
|
||||
ReadPress();
|
||||
Calculate();
|
||||
Command_ReadTemp(); // Read Temp
|
||||
result = 1; // New pressure reading
|
||||
}
|
||||
}
|
||||
return(result);
|
||||
}
|
||||
|
||||
|
||||
// Send command to Read Pressure
|
||||
void APM_BMP085_Class::Command_ReadPress()
|
||||
{
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xF4);
|
||||
Wire.send(0x34+(oss << 6)); // write_register(0xF4, 0x34+(oversampling_setting << 6));
|
||||
Wire.endTransmission();
|
||||
}
|
||||
|
||||
// Read Raw Pressure values
|
||||
void APM_BMP085_Class::ReadPress()
|
||||
{
|
||||
byte msb;
|
||||
byte lsb;
|
||||
byte xlsb;
|
||||
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xF6);
|
||||
Wire.endTransmission();
|
||||
|
||||
Wire.requestFrom(BMP085_ADDRESS, 3); // read a byte
|
||||
|
||||
while(!Wire.available()) {
|
||||
// waiting
|
||||
}
|
||||
|
||||
msb = Wire.receive();
|
||||
|
||||
while(!Wire.available()) {
|
||||
// waiting
|
||||
}
|
||||
|
||||
lsb = Wire.receive();
|
||||
|
||||
while(!Wire.available()) {
|
||||
// waiting
|
||||
}
|
||||
|
||||
xlsb = Wire.receive();
|
||||
RawPress = (((long)msb << 16) | ((long)lsb << 8) | ((long)xlsb)) >> (8 - oss);
|
||||
|
||||
if(_offset_press == 0){
|
||||
_offset_press = RawPress;
|
||||
RawPress = 0;
|
||||
}else{
|
||||
RawPress -= _offset_press;
|
||||
}
|
||||
// filter
|
||||
_press_filter[_press_index++] = RawPress;
|
||||
|
||||
if(_press_index >= PRESS_FILTER_SIZE)
|
||||
_press_index = 0;
|
||||
|
||||
RawPress = 0;
|
||||
// sum our filter
|
||||
for(uint8_t i = 0; i < PRESS_FILTER_SIZE; i++){
|
||||
RawPress += _press_filter[i];
|
||||
}
|
||||
|
||||
// grab result
|
||||
RawPress /= PRESS_FILTER_SIZE;
|
||||
//RawPress >>= 3;
|
||||
RawPress += _offset_press;
|
||||
}
|
||||
|
||||
// Send Command to Read Temperature
|
||||
void APM_BMP085_Class::Command_ReadTemp()
|
||||
{
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xF4);
|
||||
Wire.send(0x2E);
|
||||
Wire.endTransmission();
|
||||
}
|
||||
|
||||
// Read Raw Temperature values
|
||||
void APM_BMP085_Class::ReadTemp()
|
||||
{
|
||||
byte tmp;
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xF6);
|
||||
Wire.endTransmission();
|
||||
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.requestFrom(BMP085_ADDRESS,2);
|
||||
|
||||
while(!Wire.available()); // wait
|
||||
RawTemp = Wire.receive();
|
||||
|
||||
while(!Wire.available()); // wait
|
||||
tmp = Wire.receive();
|
||||
|
||||
RawTemp = RawTemp << 8 | tmp;
|
||||
|
||||
if(_offset_temp == 0){
|
||||
_offset_temp = RawTemp;
|
||||
RawTemp = 0;
|
||||
}else{
|
||||
RawTemp -= _offset_temp;
|
||||
}
|
||||
|
||||
// filter
|
||||
_temp_filter[_temp_index++] = RawTemp;
|
||||
|
||||
if(_temp_index >= TEMP_FILTER_SIZE)
|
||||
_temp_index = 0;
|
||||
|
||||
RawTemp = 0;
|
||||
// sum our filter
|
||||
for(uint8_t i = 0; i < TEMP_FILTER_SIZE; i++){
|
||||
RawTemp += _temp_filter[i];
|
||||
}
|
||||
|
||||
// grab result
|
||||
RawTemp /= TEMP_FILTER_SIZE;
|
||||
//RawTemp >>= 4;
|
||||
RawTemp += _offset_temp;
|
||||
}
|
||||
|
||||
// Calculate Temperature and Pressure in real units.
|
||||
void APM_BMP085_Class::Calculate()
|
||||
{
|
||||
long x1, x2, x3, b3, b5, b6, p;
|
||||
unsigned long b4, b7;
|
||||
int32_t tmp;
|
||||
|
||||
// See Datasheet page 13 for this formulas
|
||||
// Based also on Jee Labs BMP085 example code. Thanks for share.
|
||||
// Temperature calculations
|
||||
x1 = ((long)RawTemp - ac6) * ac5 >> 15;
|
||||
x2 = ((long) mc << 11) / (x1 + md);
|
||||
b5 = x1 + x2;
|
||||
Temp = (b5 + 8) >> 4;
|
||||
|
||||
// Pressure calculations
|
||||
b6 = b5 - 4000;
|
||||
x1 = (b2 * (b6 * b6 >> 12)) >> 11;
|
||||
x2 = ac2 * b6 >> 11;
|
||||
x3 = x1 + x2;
|
||||
//b3 = (((int32_t) ac1 * 4 + x3)<<oss + 2) >> 2; // BAD
|
||||
//b3 = ((int32_t) ac1 * 4 + x3 + 2) >> 2; //OK for oss=0
|
||||
tmp = ac1;
|
||||
tmp = (tmp*4 + x3)<<oss;
|
||||
b3 = (tmp+2)/4;
|
||||
x1 = ac3 * b6 >> 13;
|
||||
x2 = (b1 * (b6 * b6 >> 12)) >> 16;
|
||||
x3 = ((x1 + x2) + 2) >> 2;
|
||||
b4 = (ac4 * (uint32_t) (x3 + 32768)) >> 15;
|
||||
b7 = ((uint32_t) RawPress - b3) * (50000 >> oss);
|
||||
p = b7 < 0x80000000 ? (b7 * 2) / b4 : (b7 / b4) * 2;
|
||||
|
||||
x1 = (p >> 8) * (p >> 8);
|
||||
x1 = (x1 * 3038) >> 16;
|
||||
x2 = (-7357 * p) >> 16;
|
||||
Press = p + ((x1 + x2 + 3791) >> 4);
|
||||
}
|
||||
|
||||
/*
|
||||
// Read the sensor. This is a state machine
|
||||
// We read one time Temperature (state=1) and then 4 times Pressure (states 2-5)
|
||||
uint8_t APM_BMP085_Class::Read()
|
||||
{
|
||||
uint8_t result = 0;
|
||||
|
||||
if (BMP085_State == 1){
|
||||
if (BMP_DATA_READY()) {
|
||||
ReadTemp(); // On state 1 we read temp
|
||||
BMP085_State++;
|
||||
Command_ReadPress();
|
||||
}
|
||||
}else{
|
||||
if (BMP085_State == 5){
|
||||
if (BMP_DATA_READY()){
|
||||
ReadPress();
|
||||
Calculate();
|
||||
|
||||
BMP085_State = 1; // Start again from state = 1
|
||||
Command_ReadTemp(); // Read Temp
|
||||
result = 1; // New pressure reading
|
||||
}
|
||||
}else{
|
||||
if (BMP_DATA_READY()){
|
||||
ReadPress();
|
||||
Calculate();
|
||||
BMP085_State++;
|
||||
Command_ReadPress();
|
||||
result = 1; // New pressure reading
|
||||
}
|
||||
}
|
||||
}
|
||||
return(result);
|
||||
}
|
||||
*/
|
||||
// Read the sensor. This is a state machine
|
||||
// We read one time Temperature (state=1) and then 4 times Pressure (states 2-5)
|
||||
uint8_t APM_BMP085_Class::Read()
|
||||
{
|
||||
uint8_t result = 0;
|
||||
|
||||
if (BMP085_State == 1){
|
||||
if (BMP_DATA_READY()){
|
||||
BMP085_State = 2;
|
||||
ReadTemp(); // On state 1 we read temp
|
||||
Command_ReadPress();
|
||||
}
|
||||
}else{
|
||||
if (BMP_DATA_READY()){
|
||||
BMP085_State = 1; // Start again from state = 1
|
||||
ReadPress();
|
||||
Calculate();
|
||||
Command_ReadTemp(); // Read Temp
|
||||
result = 1; // New pressure reading
|
||||
}
|
||||
}
|
||||
return(result);
|
||||
}
|
||||
|
||||
|
||||
// Send command to Read Pressure
|
||||
void APM_BMP085_Class::Command_ReadPress()
|
||||
{
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xF4);
|
||||
Wire.send(0x34+(oss << 6)); // write_register(0xF4, 0x34+(oversampling_setting << 6));
|
||||
Wire.endTransmission();
|
||||
}
|
||||
|
||||
// Read Raw Pressure values
|
||||
void APM_BMP085_Class::ReadPress()
|
||||
{
|
||||
byte msb;
|
||||
byte lsb;
|
||||
byte xlsb;
|
||||
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xF6);
|
||||
Wire.endTransmission();
|
||||
|
||||
Wire.requestFrom(BMP085_ADDRESS, 3); // read a byte
|
||||
|
||||
while(!Wire.available()) {
|
||||
// waiting
|
||||
}
|
||||
|
||||
msb = Wire.receive();
|
||||
|
||||
while(!Wire.available()) {
|
||||
// waiting
|
||||
}
|
||||
|
||||
lsb = Wire.receive();
|
||||
|
||||
while(!Wire.available()) {
|
||||
// waiting
|
||||
}
|
||||
|
||||
xlsb = Wire.receive();
|
||||
RawPress = (((long)msb << 16) | ((long)lsb << 8) | ((long)xlsb)) >> (8 - oss);
|
||||
|
||||
if(_offset_press == 0){
|
||||
_offset_press = RawPress;
|
||||
RawPress = 0;
|
||||
}else{
|
||||
RawPress -= _offset_press;
|
||||
}
|
||||
// filter
|
||||
_press_filter[_press_index++] = RawPress;
|
||||
|
||||
if(_press_index >= PRESS_FILTER_SIZE)
|
||||
_press_index = 0;
|
||||
|
||||
RawPress = 0;
|
||||
// sum our filter
|
||||
for(uint8_t i = 0; i < PRESS_FILTER_SIZE; i++){
|
||||
RawPress += _press_filter[i];
|
||||
}
|
||||
|
||||
// grab result
|
||||
RawPress /= PRESS_FILTER_SIZE;
|
||||
//RawPress >>= 3;
|
||||
RawPress += _offset_press;
|
||||
}
|
||||
|
||||
// Send Command to Read Temperature
|
||||
void APM_BMP085_Class::Command_ReadTemp()
|
||||
{
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xF4);
|
||||
Wire.send(0x2E);
|
||||
Wire.endTransmission();
|
||||
}
|
||||
|
||||
// Read Raw Temperature values
|
||||
void APM_BMP085_Class::ReadTemp()
|
||||
{
|
||||
byte tmp;
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.send(0xF6);
|
||||
Wire.endTransmission();
|
||||
|
||||
Wire.beginTransmission(BMP085_ADDRESS);
|
||||
Wire.requestFrom(BMP085_ADDRESS,2);
|
||||
|
||||
while(!Wire.available()); // wait
|
||||
RawTemp = Wire.receive();
|
||||
|
||||
while(!Wire.available()); // wait
|
||||
tmp = Wire.receive();
|
||||
|
||||
RawTemp = RawTemp << 8 | tmp;
|
||||
|
||||
if(_offset_temp == 0){
|
||||
_offset_temp = RawTemp;
|
||||
RawTemp = 0;
|
||||
}else{
|
||||
RawTemp -= _offset_temp;
|
||||
}
|
||||
|
||||
// filter
|
||||
_temp_filter[_temp_index++] = RawTemp;
|
||||
|
||||
if(_temp_index >= TEMP_FILTER_SIZE)
|
||||
_temp_index = 0;
|
||||
|
||||
RawTemp = 0;
|
||||
// sum our filter
|
||||
for(uint8_t i = 0; i < TEMP_FILTER_SIZE; i++){
|
||||
RawTemp += _temp_filter[i];
|
||||
}
|
||||
|
||||
// grab result
|
||||
RawTemp /= TEMP_FILTER_SIZE;
|
||||
//RawTemp >>= 4;
|
||||
RawTemp += _offset_temp;
|
||||
}
|
||||
|
||||
// Calculate Temperature and Pressure in real units.
|
||||
void APM_BMP085_Class::Calculate()
|
||||
{
|
||||
long x1, x2, x3, b3, b5, b6, p;
|
||||
unsigned long b4, b7;
|
||||
int32_t tmp;
|
||||
|
||||
// See Datasheet page 13 for this formulas
|
||||
// Based also on Jee Labs BMP085 example code. Thanks for share.
|
||||
// Temperature calculations
|
||||
x1 = ((long)RawTemp - ac6) * ac5 >> 15;
|
||||
x2 = ((long) mc << 11) / (x1 + md);
|
||||
b5 = x1 + x2;
|
||||
Temp = (b5 + 8) >> 4;
|
||||
|
||||
// Pressure calculations
|
||||
b6 = b5 - 4000;
|
||||
x1 = (b2 * (b6 * b6 >> 12)) >> 11;
|
||||
x2 = ac2 * b6 >> 11;
|
||||
x3 = x1 + x2;
|
||||
//b3 = (((int32_t) ac1 * 4 + x3)<<oss + 2) >> 2; // BAD
|
||||
//b3 = ((int32_t) ac1 * 4 + x3 + 2) >> 2; //OK for oss=0
|
||||
tmp = ac1;
|
||||
tmp = (tmp*4 + x3)<<oss;
|
||||
b3 = (tmp+2)/4;
|
||||
x1 = ac3 * b6 >> 13;
|
||||
x2 = (b1 * (b6 * b6 >> 12)) >> 16;
|
||||
x3 = ((x1 + x2) + 2) >> 2;
|
||||
b4 = (ac4 * (uint32_t) (x3 + 32768)) >> 15;
|
||||
b7 = ((uint32_t) RawPress - b3) * (50000 >> oss);
|
||||
p = b7 < 0x80000000 ? (b7 * 2) / b4 : (b7 / b4) * 2;
|
||||
|
||||
x1 = (p >> 8) * (p >> 8);
|
||||
x1 = (x1 * 3038) >> 16;
|
||||
x2 = (-7357 * p) >> 16;
|
||||
Press = p + ((x1 + x2 + 3791) >> 4);
|
||||
}
|
||||
|
|
|
@ -1,49 +1,49 @@
|
|||
#ifndef APM_BMP085_h
|
||||
#define APM_BMP085_h
|
||||
|
||||
#define TEMP_FILTER_SIZE 4
|
||||
#define PRESS_FILTER_SIZE 8
|
||||
|
||||
#include "APM_BMP085_hil.h"
|
||||
|
||||
class APM_BMP085_Class
|
||||
{
|
||||
public:
|
||||
APM_BMP085_Class():
|
||||
_temp_index(0),
|
||||
_press_index(0){}; // Constructor
|
||||
int32_t RawPress;
|
||||
int32_t _offset_press;
|
||||
int32_t RawTemp;
|
||||
int16_t Temp;
|
||||
int32_t Press;
|
||||
//int Altitude;
|
||||
uint8_t oss;
|
||||
#ifndef APM_BMP085_h
|
||||
#define APM_BMP085_h
|
||||
|
||||
#define TEMP_FILTER_SIZE 4
|
||||
#define PRESS_FILTER_SIZE 8
|
||||
|
||||
#include "APM_BMP085_hil.h"
|
||||
|
||||
class APM_BMP085_Class
|
||||
{
|
||||
public:
|
||||
APM_BMP085_Class():
|
||||
_temp_index(0),
|
||||
_press_index(0){}; // Constructor
|
||||
int32_t RawPress;
|
||||
int32_t _offset_press;
|
||||
int32_t RawTemp;
|
||||
int16_t Temp;
|
||||
int32_t Press;
|
||||
//int Altitude;
|
||||
uint8_t oss;
|
||||
bool _apm2_hardware;
|
||||
//int32_t Press0; // Pressure at sea level
|
||||
|
||||
//int32_t Press0; // Pressure at sea level
|
||||
|
||||
bool Init(int initialiseWireLib = 1, bool apm2_hardware=false);
|
||||
uint8_t Read();
|
||||
|
||||
private:
|
||||
// State machine
|
||||
uint8_t BMP085_State;
|
||||
// Internal calibration registers
|
||||
int16_t ac1, ac2, ac3, b1, b2, mb, mc, md;
|
||||
uint16_t ac4, ac5, ac6;
|
||||
|
||||
int _temp_filter[TEMP_FILTER_SIZE];
|
||||
int _press_filter[PRESS_FILTER_SIZE];
|
||||
long _offset_temp;
|
||||
|
||||
uint8_t _temp_index;
|
||||
uint8_t _press_index;
|
||||
|
||||
void Command_ReadPress();
|
||||
void Command_ReadTemp();
|
||||
void ReadPress();
|
||||
void ReadTemp();
|
||||
void Calculate();
|
||||
};
|
||||
|
||||
#endif
|
||||
uint8_t Read();
|
||||
|
||||
private:
|
||||
// State machine
|
||||
uint8_t BMP085_State;
|
||||
// Internal calibration registers
|
||||
int16_t ac1, ac2, ac3, b1, b2, mb, mc, md;
|
||||
uint16_t ac4, ac5, ac6;
|
||||
|
||||
int _temp_filter[TEMP_FILTER_SIZE];
|
||||
int _press_filter[PRESS_FILTER_SIZE];
|
||||
long _offset_temp;
|
||||
|
||||
uint8_t _temp_index;
|
||||
uint8_t _press_index;
|
||||
|
||||
void Command_ReadPress();
|
||||
void Command_ReadTemp();
|
||||
void ReadPress();
|
||||
void ReadTemp();
|
||||
void Calculate();
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
Loading…
Reference in New Issue