updating code for chp 10

chp10/gpioExpander/bus/BusDevice.cpp

@@ -1,12 +1,6 @@
-/*
- * BusDevice.cpp  Created on: 23 May 2014
- * Copyright (c) 2014 Derek Molloy (www.derekmolloy.ie)
- * Made available for the book "Exploring Raspberry Pi"
- */
-
 #include "BusDevice.h"
 
-namespace exploringRPi {
+namespace exploringBB {
 
 BusDevice::BusDevice(unsigned int bus, unsigned int device) {
 	this->bus = bus;
@@ -16,4 +10,4 @@ BusDevice::BusDevice(unsigned int bus, unsigned int device) {
 
 BusDevice::~BusDevice() {}
 
-} /* namespace exploringRPi */
+} /* namespace exploringBB */

chp10/gpioExpander/bus/BusDevice.h

@@ -1,13 +1,7 @@
-/*
- * BusDevice.h  Created on: 23 May 2015
- * Copyright (c) 2014 Derek Molloy (www.derekmolloy.ie)
- * Made available for the book "Exploring Raspberry Pi"
- */
-
 #ifndef BUSDEVICE_H_
 #define BUSDEVICE_H_
 
-namespace exploringRPi {
+namespace exploringBB {
 
 /**
  * @class BusDevice
@@ -33,6 +27,6 @@ class BusDevice {
 	virtual ~BusDevice();
 };
 
-} /* namespace exploringRPi */
+} /* namespace exploringBB */
 
 #endif /* BUSDEVICE_H_ */

chp10/gpioExpander/bus/I2CDevice.cpp

@@ -1,27 +1,3 @@
-/*
- * I2C.cpp  Created on: 17 May 2015
- * Copyright (c) 2015 Derek Molloy (www.derekmolloy.ie)
- * Made available for the book "Exploring Raspberry Pi"
- * See: www.exploringrpi.com
- * Licensed under the EUPL V.1.1
- *
- * This Software is provided to You under the terms of the European 
- * Union Public License (the "EUPL") version 1.1 as published by the 
- * European Union. Any use of this Software, other than as authorized 
- * under this License is strictly prohibited (to the extent such use 
- * is covered by a right of the copyright holder of this Software).
- * 
- * This Software is provided under the License on an "AS IS" basis and 
- * without warranties of any kind concerning the Software, including 
- * without limitation merchantability, fitness for a particular purpose, 
- * absence of defects or errors, accuracy, and non-infringement of 
- * intellectual property rights other than copyright. This disclaimer 
- * of warranty is an essential part of the License and a condition for 
- * the grant of any rights to this Software.
- * 
- * For more details, see http://www.derekmolloy.ie/
- */
-
 #include"I2CDevice.h"
 #include<iostream>
 #include<sstream>
@@ -36,7 +12,7 @@ using namespace std;
 
 #define HEX(x) setw(2) << setfill('0') << hex << (int)(x)
 
-namespace exploringRPi {
+namespace exploringBB {
 
 /**
  * Constructor for the I2CDevice class. It requires the bus number and device number. The constructor
@@ -55,8 +31,9 @@ I2CDevice::I2CDevice(unsigned int bus, unsigned int device):
  */
 int I2CDevice::open(){
    string name;
-   if(this->bus==0) name = RPI_I2C_0;
-   else name = RPI_I2C_1;
+   if(this->bus==0) name = I2C_0;
+   else if(this->bus==1) name = I2C_1;
+   else name = I2C_2;
 
    if((this->file=::open(name.c_str(), O_RDWR)) < 0){
       perror("I2C: failed to open the bus\n");
@@ -169,4 +146,4 @@ I2CDevice::~I2CDevice() {
 	if(file!=-1) this->close();
 }
 
-} /* namespace exploringRPi */
+} /* namespace exploringBB */

chp10/gpioExpander/bus/I2CDevice.h

@@ -1,35 +1,12 @@
-/*
- * I2C.h  Created on: 17 May 2015
- * Copyright (c) 2015 Derek Molloy (www.derekmolloy.ie)
- * Made available for the book "Exploring Raspberry Pi"
- * See: www.exploringrpi.com
- * Licensed under the EUPL V.1.1
- *
- * This Software is provided to You under the terms of the European 
- * Union Public License (the "EUPL") version 1.1 as published by the 
- * European Union. Any use of this Software, other than as authorized 
- * under this License is strictly prohibited (to the extent such use 
- * is covered by a right of the copyright holder of this Software).
- * 
- * This Software is provided under the License on an "AS IS" basis and 
- * without warranties of any kind concerning the Software, including 
- * without limitation merchantability, fitness for a particular purpose, 
- * absence of defects or errors, accuracy, and non-infringement of 
- * intellectual property rights other than copyright. This disclaimer 
- * of warranty is an essential part of the License and a condition for 
- * the grant of any rights to this Software.
- * 
- * For more details, see http://www.derekmolloy.ie/
- */
-
 #ifndef I2C_H_
 #define I2C_H_
 #include"BusDevice.h"
 
-#define RPI_I2C_0 "/dev/i2c-0"
-#define RPI_I2C_1 "/dev/i2c-1"
+#define I2C_0 "/dev/i2c-0"
+#define I2C_1 "/dev/i2c-1"
+#define I2C_2 "/dev/i2c-2"
 
-namespace exploringRPi{
+namespace exploringBB{
 
 /**
  * @class I2CDevice
@@ -49,6 +26,6 @@ class I2CDevice:public BusDevice{
 	virtual ~I2CDevice();
 };
 
-} /* namespace exploringRPi */
+} /* namespace exploringBB */
 
 #endif /* I2C_H_ */

chp10/gpioExpander/bus/SPIDevice.cpp

@@ -1,8 +1,3 @@
-/*
- * SPIDevice.cpp  Created on: 22 June 2015
- * Copyright (c) 2014 Derek Molloy (www.derekmolloy.ie)
- * Made available for the book "Exploring Raspberry Pi"
- */
 
 #include "SPIDevice.h"
 #include <iostream>
@@ -22,7 +17,7 @@ using namespace std;
 
 #define HEX(x) setw(2) << setfill('0') << hex << (int)(x)
 
-namespace exploringRPi {
+namespace exploringBB {
 
 /**
  * The constructor for the SPIDevice that sets up and opens the SPI connection.
@@ -190,4 +185,4 @@ SPIDevice::~SPIDevice() {
 	this->close();
 }
 
-} /* namespace exploringRPi */
+} /* namespace exploringBB */

chp10/gpioExpander/bus/SPIDevice.h

@@ -1,9 +1,3 @@
-/*
- * SPIDevice.h  Created on: 22 May 2015
- * Copyright (c) 2015 Derek Molloy (www.derekmolloy.ie)
- * Made available for the book "Exploring Raspberry Pi"
- */
-
 #ifndef SPIDEVICE_H_
 #define SPIDEVICE_H_
 #include<string>
@@ -12,7 +6,7 @@
 
 #define SPI_PATH "/dev/spidev"
 
-namespace exploringRPi{
+namespace exploringBB{
 
 /**
  * @class SPIDevice
@@ -55,6 +49,6 @@ class SPIDevice:public BusDevice {
 	uint16_t delay;
 };
 
-} /* namespace exploringRPi */
+} /* namespace exploringBB */
 
 #endif /* SPIDEVICE_H_ */

chp10/gpioExpander/displayRegisters.cpp

@@ -10,7 +10,7 @@
 #include "gpioExpander.h"
 
 using namespace std;
-using namespace exploringRPi;
+using namespace exploringBB;
 
 int main(){
    unsigned char receive; // used to store the send/rec data

chp10/gpioExpander/example.cpp

@@ -13,7 +13,7 @@
 #include "gpioExpander.h"
 
 using namespace std;
-using namespace exploringRPi;
+using namespace exploringBB;
 
 int main(){
    cout << "Starting the GPIO Expander Example" << endl;

chp10/gpioExpander/gpioExpander.cpp

@@ -1,10 +1,3 @@
-/*
- * gpioExpander.cpp  Created on: 17 May 2015
- * Copyright (c) 2015 Derek Molloy (www.derekmolloy.ie)
- * Made available for the book "Exploring Raspberry Pi"
- * See: www.exploringrpi.com
- * Licensed under the EUPL V.1.1  */
-
 #include "gpioExpander.h"
 #include <iostream>
 #include <unistd.h>
@@ -15,7 +8,7 @@
 #include <iomanip>
 using namespace std;
 
-namespace exploringRPi {
+namespace exploringBB {
 
 //From Table 1-3 for the MCP23X17 Data sheet
 #define IODIRA   0x00   //< Input/Output direction Port A Register
@@ -275,4 +268,4 @@ void GPIOExpander::dumpRegisters(){
   }
 }
 
-} /* namespace exploringRPi */
+} /* namespace exploringBB */

chp10/gpioExpander/gpioExpander.h

@@ -1,10 +1,3 @@
-/*
- * gpioExpander.h  Created on: 17 May 2015
- * Copyright (c) 2015 Derek Molloy (www.derekmolloy.ie)
- * Made available for the book "Exploring Raspberry Pi"
- * See: www.exploringrpi.com
- * Licensed under the EUPL V.1.1 */
-
 #ifndef GPIOEXPANDER_H_
 #define GPIOEXPANDER_H_
 #include "bus/SPIDevice.h"
@@ -13,7 +6,7 @@
 /// The MCP23X17 has 11 register pairs (registers 0x00 to 0x1A)
 #define BUFFER_SIZE 0x1A
 
-namespace exploringRPi {
+namespace exploringBB {
 
 /**
  * @class GPIOExpander
@@ -98,6 +91,6 @@ class GPIOExpander {
    virtual ~GPIOExpander() {};
 };
 
-} /* namespace exploringRPi */
+} /* namespace exploringBB */
 
 #endif /* GPIOEXPANDER_H_ */

chp10/gpioExpander/testI2C.cpp

@@ -10,7 +10,7 @@
 #include "gpioExpander.h"
 
 using namespace std;
-using namespace exploringRPi;
+using namespace exploringBB;
 
 int main(){
    unsigned char value;

chp10/gpioExpander/testSPI.cpp

@@ -10,7 +10,7 @@
 #include "gpioExpander.h"
 
 using namespace std;
-using namespace exploringRPi;
+using namespace exploringBB;
 
 int main(){
    unsigned char send[3], receive[3]; // used to store the send/rec data

chp10/hello/hello.ino

@@ -0,0 +1,16 @@
+int ledPin = 13;                    // the Arduino on-board LED
+
+void setup() {
+  Serial.begin(9600, SERIAL_8N1);   // set up 8-bit with no parity and 1 stop bit
+  pinMode(ledPin, OUTPUT);          // the ledPin is an output
+  Serial.write("Hello from the Arduino");
+}
+
+// this function loops as quickly as possible, forever
+void loop() {
+  digitalWrite(ledPin, HIGH);       // set the LED pin high
+  delay(500);                       // high and low every second (flash at 1Hz)
+  digitalWrite(ledPin, LOW);        // set the LED pin low
+  delay(500);                   
+}
+

chp10/i2c/echo/echo.ino

@@ -0,0 +1,23 @@
+#include <Wire.h>                  // Uses the Two-Wire Interface (TWI)
+
+const byte slaveAddr = 0x44;       // the slave address of the Arduino
+int registerAddr;                  // the shared register addr variable
+
+void setup() {                     // the setup function -- called once
+  TWBR=100000L;                    // the i2c clk freq: 400000L = 400kHz
+  Wire.begin(slaveAddr);           // set Arduino as an I2C slave device
+  Wire.onReceive(receiveRegister); // register receive listener below
+  Wire.onRequest(respondData);     // register respond listener below
+}
+
+void loop() {                       
+  delay(1000);                     // loop each second -- reduce load
+}                     
+
+void receiveRegister(int x){       // handler called when data available
+  registerAddr = Wire.read();      // read in one-byte address from PB
+}
+
+void respondData(){                // handler that is called on response
+  Wire.write(registerAddr);        // i.e., send the data back to the PB
+}

chp10/i2c/i2cTMP36/i2cTMP36.ino

@@ -0,0 +1,36 @@
+#include <Wire.h>                  // uses the Two-Wire Interface (TWI)
+const byte slaveAddr = 0x44;       // the slave address of the Arduino
+int registerAddr;                  // the shared register addr variable
+const int analogInPin = A0;        // analog input for the TMP36 
+int data[4];                       // the data registers 00 to 0x03
+
+void setup(){
+  TWBR=100000L;                    // set the i2c clk freq e.g. 100000L
+  Wire.begin(slaveAddr);           // set up the Arduino as an I2C slave
+  Wire.onReceive(receiveRegister); // register receive listener below
+  Wire.onRequest(respondData);     // register respond listener below
+}
+
+void loop(){                       // update registers every five seconds
+  int adcValue = analogRead(analogInPin);           // using a 10-bit ADC
+  float curVoltage = adcValue * (5.0f/1024.0f);     // Vcc = 5.0V, 10-bit
+  float tempC = 25.0 + ((curVoltage-0.75f)/0.01f);  // from datasheet
+  float tempF = 32.0 + ((tempC * 9)/5);             // deg. C to F
+  data[0] = (int) tempC;                            // whole deg C (0x00)
+  data[1] = (int) ((tempC - data[0])*100);          // fract C     (0x01)
+  data[2] = (int) tempF;                            // whole deg F (0x02)
+  data[3] = (int) ((tempF - data[2])*100);          // fract F     (0x03)
+  delay(5000);                                      // delay 5 seconds
+}                     
+
+void receiveRegister(int x){       // passes the number of bytes
+  registerAddr = Wire.read();      // read in the one-byte address
+}
+
+void respondData(){                // respond function
+  byte dataValue = 0x00;           // default response value is 0x00
+  if ((registerAddr >= 0x00) && (registerAddr <0x04)){      
+     dataValue = data[registerAddr];
+  }
+  Wire.write(dataValue);           // send the data back to the PB
+}