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diff --git a/libraries/Ethernet/examples/BarometricPressureWebServer/BarometricPressureWebServer.ino b/libraries/Ethernet/examples/BarometricPressureWebServer/BarometricPressureWebServer.ino
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-/*
- SCP1000 Barometric Pressure Sensor Display
-
- Serves the output of a Barometric Pressure Sensor as a web page.
- Uses the SPI library. For details on the sensor, see:
- http://www.sparkfun.com/commerce/product_info.php?products_id=8161
- http://www.vti.fi/en/support/obsolete_products/pressure_sensors/
-
- This sketch adapted from Nathan Seidle's SCP1000 example for PIC:
- http://www.sparkfun.com/datasheets/Sensors/SCP1000-Testing.zip
-
- Circuit:
- SCP1000 sensor attached to pins 6,7, and 11 - 13:
- DRDY: pin 6
- CSB: pin 7
- MOSI: pin 11
- MISO: pin 12
- SCK: pin 13
-
- created 31 July 2010
- by Tom Igoe
- */
-
-#include <Ethernet.h>
-// the sensor communicates using SPI, so include the library:
-#include <SPI.h>
-
-
-// assign a MAC address for the ethernet controller.
-// fill in your address here:
-byte mac[] = {
- 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
-// assign an IP address for the controller:
-IPAddress ip(192,168,1,20);
-IPAddress gateway(192,168,1,1);
-IPAddress subnet(255, 255, 255, 0);
-
-
-// Initialize the Ethernet server library
-// with the IP address and port you want to use
-// (port 80 is default for HTTP):
-EthernetServer server(80);
-
-
-//Sensor's memory register addresses:
-const int PRESSURE = 0x1F; //3 most significant bits of pressure
-const int PRESSURE_LSB = 0x20; //16 least significant bits of pressure
-const int TEMPERATURE = 0x21; //16 bit temperature reading
-
-// pins used for the connection with the sensor
-// the others you need are controlled by the SPI library):
-const int dataReadyPin = 6;
-const int chipSelectPin = 7;
-
-float temperature = 0.0;
-long pressure = 0;
-long lastReadingTime = 0;
-
-void setup() {
- // start the SPI library:
- SPI.begin();
-
- // start the Ethernet connection and the server:
- Ethernet.begin(mac, ip);
- server.begin();
-
- // initalize the data ready and chip select pins:
- pinMode(dataReadyPin, INPUT);
- pinMode(chipSelectPin, OUTPUT);
-
- Serial.begin(9600);
-
- //Configure SCP1000 for low noise configuration:
- writeRegister(0x02, 0x2D);
- writeRegister(0x01, 0x03);
- writeRegister(0x03, 0x02);
-
- // give the sensor and Ethernet shield time to set up:
- delay(1000);
-
- //Set the sensor to high resolution mode tp start readings:
- writeRegister(0x03, 0x0A);
-
-}
-
-void loop() {
- // check for a reading no more than once a second.
- if (millis() - lastReadingTime > 1000){
- // if there's a reading ready, read it:
- // don't do anything until the data ready pin is high:
- if (digitalRead(dataReadyPin) == HIGH) {
- getData();
- // timestamp the last time you got a reading:
- lastReadingTime = millis();
- }
- }
-
- // listen for incoming Ethernet connections:
- listenForEthernetClients();
-}
-
-
-void getData() {
- Serial.println("Getting reading");
- //Read the temperature data
- int tempData = readRegister(0x21, 2);
-
- // convert the temperature to celsius and display it:
- temperature = (float)tempData / 20.0;
-
- //Read the pressure data highest 3 bits:
- byte pressureDataHigh = readRegister(0x1F, 1);
- pressureDataHigh &= 0b00000111; //you only needs bits 2 to 0
-
- //Read the pressure data lower 16 bits:
- unsigned int pressureDataLow = readRegister(0x20, 2);
- //combine the two parts into one 19-bit number:
- pressure = ((pressureDataHigh << 16) | pressureDataLow)/4;
-
- Serial.print("Temperature: ");
- Serial.print(temperature);
- Serial.println(" degrees C");
- Serial.print("Pressure: " + String(pressure));
- Serial.println(" Pa");
-}
-
-void listenForEthernetClients() {
- // listen for incoming clients
- EthernetClient client = server.available();
- if (client) {
- Serial.println("Got a client");
- // an http request ends with a blank line
- boolean currentLineIsBlank = true;
- while (client.connected()) {
- if (client.available()) {
- char c = client.read();
- // if you've gotten to the end of the line (received a newline
- // character) and the line is blank, the http request has ended,
- // so you can send a reply
- if (c == '\n' && currentLineIsBlank) {
- // send a standard http response header
- client.println("HTTP/1.1 200 OK");
- client.println("Content-Type: text/html");
- client.println();
- // print the current readings, in HTML format:
- client.print("Temperature: ");
- client.print(temperature);
- client.print(" degrees C");
- client.println("<br />");
- client.print("Pressure: " + String(pressure));
- client.print(" Pa");
- client.println("<br />");
- break;
- }
- if (c == '\n') {
- // you're starting a new line
- currentLineIsBlank = true;
- }
- else if (c != '\r') {
- // you've gotten a character on the current line
- currentLineIsBlank = false;
- }
- }
- }
- // give the web browser time to receive the data
- delay(1);
- // close the connection:
- client.stop();
- }
-}
-
-
-//Send a write command to SCP1000
-void writeRegister(byte registerName, byte registerValue) {
- // SCP1000 expects the register name in the upper 6 bits
- // of the byte:
- registerName <<= 2;
- // command (read or write) goes in the lower two bits:
- registerName |= 0b00000010; //Write command
-
- // take the chip select low to select the device:
- digitalWrite(chipSelectPin, LOW);
-
- SPI.transfer(registerName); //Send register location
- SPI.transfer(registerValue); //Send value to record into register
-
- // take the chip select high to de-select:
- digitalWrite(chipSelectPin, HIGH);
-}
-
-
-//Read register from the SCP1000:
-unsigned int readRegister(byte registerName, int numBytes) {
- byte inByte = 0; // incoming from the SPI read
- unsigned int result = 0; // result to return
-
- // SCP1000 expects the register name in the upper 6 bits
- // of the byte:
- registerName <<= 2;
- // command (read or write) goes in the lower two bits:
- registerName &= 0b11111100; //Read command
-
- // take the chip select low to select the device:
- digitalWrite(chipSelectPin, LOW);
- // send the device the register you want to read:
- int command = SPI.transfer(registerName);
- // send a value of 0 to read the first byte returned:
- inByte = SPI.transfer(0x00);
-
- result = inByte;
- // if there's more than one byte returned,
- // shift the first byte then get the second byte:
- if (numBytes > 1){
- result = inByte << 8;
- inByte = SPI.transfer(0x00);
- result = result |inByte;
- }
- // take the chip select high to de-select:
- digitalWrite(chipSelectPin, HIGH);
- // return the result:
- return(result);
-}