arduino-0022
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Eve Entropia
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803 changed files with 69785 additions and 33024 deletions
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/*
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SCP1000 Barometric Pressure Sensor Display
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Shows the output of a Barometric Pressure Sensor on a
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Uses the SPI library. For details on the sensor, see:
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http://www.sparkfun.com/commerce/product_info.php?products_id=8161
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http://www.vti.fi/en/support/obsolete_products/pressure_sensors/
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This sketch adapted from Nathan Seidle's SCP1000 example for PIC:
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http://www.sparkfun.com/datasheets/Sensors/SCP1000-Testing.zip
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Circuit:
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SCP1000 sensor attached to pins 6, 7, 10 - 13:
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DRDY: pin 6
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CSB: pin 7
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MOSI: pin 11
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MISO: pin 12
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SCK: pin 13
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created 31 July 2010
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modified 14 August 2010
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by Tom Igoe
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*/
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// the sensor communicates using SPI, so include the library:
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#include <SPI.h>
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//Sensor's memory register addresses:
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const int PRESSURE = 0x1F; //3 most significant bits of pressure
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const int PRESSURE_LSB = 0x20; //16 least significant bits of pressure
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const int TEMPERATURE = 0x21; //16 bit temperature reading
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const byte READ = 0b11111100; // SCP1000's read command
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const byte WRITE = 0b00000010; // SCP1000's write command
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// pins used for the connection with the sensor
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// the other you need are controlled by the SPI library):
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const int dataReadyPin = 6;
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const int chipSelectPin = 7;
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void setup() {
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Serial.begin(9600);
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// start the SPI library:
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SPI.begin();
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// initalize the data ready and chip select pins:
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pinMode(dataReadyPin, INPUT);
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pinMode(chipSelectPin, OUTPUT);
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//Configure SCP1000 for low noise configuration:
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writeRegister(0x02, 0x2D);
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writeRegister(0x01, 0x03);
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writeRegister(0x03, 0x02);
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// give the sensor time to set up:
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delay(100);
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}
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void loop() {
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//Select High Resolution Mode
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writeRegister(0x03, 0x0A);
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// don't do anything until the data ready pin is high:
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if (digitalRead(dataReadyPin) == HIGH) {
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//Read the temperature data
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int tempData = readRegister(0x21, 2);
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// convert the temperature to celsius and display it:
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float realTemp = (float)tempData / 20.0;
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Serial.print("Temp[C]=");
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Serial.print(realTemp);
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//Read the pressure data highest 3 bits:
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byte pressure_data_high = readRegister(0x1F, 1);
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pressure_data_high &= 0b00000111; //you only needs bits 2 to 0
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//Read the pressure data lower 16 bits:
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unsigned int pressure_data_low = readRegister(0x20, 2);
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//combine the two parts into one 19-bit number:
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long pressure = ((pressure_data_high << 16) | pressure_data_low)/4;
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// display the temperature:
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Serial.println("\tPressure [Pa]=" + String(pressure));
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}
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}
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//Read from or write to register from the SCP1000:
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unsigned int readRegister(byte thisRegister, int bytesToRead ) {
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byte inByte = 0; // incoming byte from the SPI
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unsigned int result = 0; // result to return
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Serial.print(thisRegister, BIN);
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Serial.print("\t");
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// SCP1000 expects the register name in the upper 6 bits
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// of the byte. So shift the bits left by two bits:
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thisRegister = thisRegister << 2;
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// now combine the address and the command into one byte
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byte dataToSend = thisRegister & READ;
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Serial.println(thisRegister, BIN);
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// take the chip select low to select the device:
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digitalWrite(chipSelectPin, LOW);
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// send the device the register you want to read:
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SPI.transfer(dataToSend);
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// send a value of 0 to read the first byte returned:
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result = SPI.transfer(0x00);
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// decrement the number of bytes left to read:
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bytesToRead--;
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// if you still have another byte to read:
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if (bytesToRead > 0) {
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// shift the first byte left, then get the second byte:
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result = result << 8;
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inByte = SPI.transfer(0x00);
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// combine the byte you just got with the previous one:
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result = result | inByte;
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// decrement the number of bytes left to read:
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bytesToRead--;
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}
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// take the chip select high to de-select:
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digitalWrite(chipSelectPin, HIGH);
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// return the result:
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return(result);
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}
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//Sends a write command to SCP1000
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void writeRegister(byte thisRegister, byte thisValue) {
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// SCP1000 expects the register address in the upper 6 bits
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// of the byte. So shift the bits left by two bits:
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thisRegister = thisRegister << 2;
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// now combine the register address and the command into one byte:
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byte dataToSend = thisRegister | WRITE;
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// take the chip select low to select the device:
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digitalWrite(chipSelectPin, LOW);
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SPI.transfer(dataToSend); //Send register location
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SPI.transfer(thisValue); //Send value to record into register
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// take the chip select high to de-select:
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digitalWrite(chipSelectPin, HIGH);
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}
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@ -0,0 +1,143 @@
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/*
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SCP1000 Barometric Pressure Sensor Display
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Shows the output of a Barometric Pressure Sensor on a
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Uses the SPI library. For details on the sensor, see:
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http://www.sparkfun.com/commerce/product_info.php?products_id=8161
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http://www.vti.fi/en/support/obsolete_products/pressure_sensors/
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This sketch adapted from Nathan Seidle's SCP1000 example for PIC:
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http://www.sparkfun.com/datasheets/Sensors/SCP1000-Testing.zip
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Circuit:
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SCP1000 sensor attached to pins 6, 7, 10 - 13:
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DRDY: pin 6
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CSB: pin 7
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MOSI: pin 11
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MISO: pin 12
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SCK: pin 13
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created 31 July 2010
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modified 14 August 2010
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by Tom Igoe
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*/
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// the sensor communicates using SPI, so include the library:
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#include <SPI.h>
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//Sensor's memory register addresses:
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const int PRESSURE = 0x1F; //3 most significant bits of pressure
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const int PRESSURE_LSB = 0x20; //16 least significant bits of pressure
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const int TEMPERATURE = 0x21; //16 bit temperature reading
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cont byte READ = 0b00000000; // SCP1000's read command
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const byte WRITE = 0b00000010; // SCP1000's write command
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// pins used for the connection with the sensor
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// the other you need are controlled by the SPI library):
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const int dataReadyPin = 6;
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const int chipSelectPin = 7;
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void setup() {
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Serial.begin(9600);
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// start the SPI library:
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SPI.begin();
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// initalize the data ready and chip select pins:
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pinMode(dataReadyPin, INPUT);
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pinMode(chipSelectPin, OUTPUT);
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//Configure SCP1000 for low noise configuration:
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writeRegister(0x02, 0x2D);
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writeRegister(0x01, 0x03);
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writeRegister(0x03, 0x02);
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// give the sensor time to set up:
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delay(100);
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}
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void loop() {
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//Select High Resolution Mode
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writeRegister(0x03, 0x0A);
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// don't do anything until the data ready pin is high:
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if (digitalRead(dataReadyPin) == HIGH) {
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//Read the temperature data
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int tempData = readRegister(0x21, 2);
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// convert the temperature to celsius and display it:
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float realTemp = (float)tempData / 20.0;
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Serial.print("Temp[C]=");
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Serial.print(realTemp);
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//Read the pressure data highest 3 bits:
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byte pressure_data_high = readRegister(0x1F, 1);
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pressure_data_high &= 0b00000111; //you only needs bits 2 to 0
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//Read the pressure data lower 16 bits:
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unsigned int pressure_data_low = readRegister(0x20, 2);
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//combine the two parts into one 19-bit number:
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long pressure = ((pressure_data_high << 16) | pressure_data_low)/4;
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// display the temperature:
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Serial.println("\tPressure [Pa]=" + String(pressure));
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}
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}
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//Read from or write to register from the SCP1000:
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unsigned int readRegister(byte thisRegister, int bytesToRead ) {
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byte inByte = 0; // incoming byte from the SPI
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unsigned int result = 0; // result to return
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// SCP1000 expects the register name in the upper 6 bits
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// of the byte. So shift the bits left by two bits:
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thisRegister = thisRegister << 2;
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// now combine the address and the command into one byte
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dataToSend = thisRegister & READ;
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// take the chip select low to select the device:
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digitalWrite(chipSelectPin, LOW);
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// send the device the register you want to read:
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SPI.transfer(dataToSend);
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// send a value of 0 to read the first byte returned:
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result = SPI.transfer(0x00);
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// decrement the number of bytes left to read:
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bytesToRead--;
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// if you still have another byte to read:
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if (bytesToRead > 0) {
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// shift the first byte left, then get the second byte:
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result = result << 8;
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inByte = SPI.transfer(0x00);
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// combine the byte you just got with the previous one:
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result = result | inByte;
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// decrement the number of bytes left to read:
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bytesToRead--;
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}
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// take the chip select high to de-select:
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digitalWrite(chipSelectPin, HIGH);
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// return the result:
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return(result);
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}
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//Sends a write command to SCP1000
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void writeRegister(byte thisRegister, byte thisValue) {
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// SCP1000 expects the register address in the upper 6 bits
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// of the byte. So shift the bits left by two bits:
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thisRegister = thisRegister << 2;
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// now combine the register address and the command into one byte:
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dataToSend = thisRegister | WRITE;
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// take the chip select low to select the device:
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digitalWrite(chipSelectPin, LOW);
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SPI.transfer(dataToSend); //Send register location
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SPI.transfer(thisValue); //Send value to record into register
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// take the chip select high to de-select:
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digitalWrite(chipSelectPin, HIGH);
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}
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