Download Arduino Microcontroller Processing for Everyone! Part II by Steven F. Barrett PDF

By Steven F. Barrett

This ebook is set the Arduino microcontroller and the Arduino inspiration. The visionary Arduino crew of Massimo Banzi, David Cuartielles, Tom Igoe, Gianluca Martino, and David Mellis introduced a brand new innovation in microcontroller in 2005, the concept that of open resource undefined. Their process was once to brazenly percentage information of microcontroller-based layout structures to stimulate the sharing of rules and advertise innovation. this idea has been well known within the software program international for a few years. This ebook is meant for a large choice of audiences together with scholars of the tremendous arts, heart and senior highschool scholars, engineering layout scholars, and practising scientists and engineers. to fulfill this broad viewers, the e-book has been divided into sections to meet the necessity of every reader. The publication comprises many software program and examples to help the reader in constructing a wide selection of structures. For the examples, the Arduino Duemilanove and the Atmel ATmega328 is hired because the aim processor. desk of Contents: Getting begun / Programming / Embedded platforms layout / Serial verbal exchange Subsystem / Analog to electronic Conversion (ADC) / Interrupt Subsystem / Timing Subsystem / Atmel AVR working Parameters and Interfacing

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Function. Function specifies the name of the interrupt service routine. • mode. Mode specifies what activity on the interrupt pin will initiate the interrupt: LOW level on pin, CHANGE in pin level, RISING edge, or FALLING edge. To illustrate the use of these built-in Arduino Development Environment features, we revisit the previous example. //************************************************************************* 144 6. INTERRUPT SUBSYSTEM void setup() { attachInterrupt(0, int0_ISR, RISING); } void loop() { //wait for interrupts } //************************************************************************* //int0_ISR: interrupt service routine for INT0 //************************************************************************* void int0_ISR(void) { //Insert interrupt specific actions here.

The three arguments of the function are configured as follows: • interrupt. Interrupt specifies the INT interrupt number: either 0 or 1. • function. Function specifies the name of the interrupt service routine. • mode. Mode specifies what activity on the interrupt pin will initiate the interrupt: LOW level on pin, CHANGE in pin level, RISING edge, or FALLING edge. To illustrate the use of these built-in Arduino Development Environment features, we revisit the previous example. //************************************************************************* 144 6.

Analog input pins #define viewer_sensor 0 //analog pin - left IR sensor #define illumination_output 0 unsigned int viewer_sensor_reading; void setup() { pinMode(illumination_output, OUTPUT); } void loop() { viewer_sensor_reading //digital output pins //illumination output pin //current value of sensor output //config. pin 0 for dig. output //read analog output from //IR sensors = analogRead(viewer_sensor); 132 5. ANALOG TO DIGITAL CONVERSION (ADC) buffer REF1 latch gain DAC latch DACA RNG buffer buffer REF2 latch A[2:0] CLK DATA LOAD LDAC D[7:0] gain DAC latch RNG DACE buffer RNG serial interface a) TLC5628 octal 8-bit DACs ATmega164/TLC5628 MOSI/DATA CLK LOW CLK LOW SCK/CLK A2 A1 A0 RNG D7 D6 D5 D4 D3 D2 PORTB[2]/Load b) TLC5628 timing diagram A[2:0] DAC Updated 000 DACA 001 DACB 010 DACC 011 DACD 100 DACE 101 DACF 110 DACG 111 DACH D[7:0] Output Voltage 0000_0000 GND 0000_0001 (1/256) x REF(1+RNG) : : : : : : : : : : 1111_1111 (255/256) x REF (1+RNG) c) TLC5628 bit assignments.

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