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

By Steven F. Barrett

This booklet is ready the Arduino microcontroller and the Arduino idea. The visionary Arduino workforce of Massimo Banzi, David Cuartielles, Tom Igoe, Gianluca Martino, and David Mellis introduced a brand new innovation in microcontroller in 2005, the idea that of open resource undefined. Their technique was once to brazenly proportion info of microcontroller-based layout systems 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 booklet is meant for a wide selection of audiences together with scholars of the effective arts, center and senior highschool scholars, engineering layout scholars, and training scientists and engineers. to fulfill this vast viewers, the booklet has been divided into sections to meet the necessity of every reader. The e-book 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 objective processor. desk of Contents: Getting begun Programming Embedded structures layout Serial communique Subsystem Analog to electronic Conversion (ADC) Interrupt Subsystem Timing Subsystem Atmel AVR working Parameters and Interfacing

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APPLICATION: ART PIECE ILLUMINATION SYSTEM – REVISITED 131 • A 12-bit command word to program each DAC. 14b) provides the interconnection between the ATmega328 and the TLC5628. The ATmega328 SPI’s SCK line is connected to the TLC5628: the MOSI to the serial data line and PORTB[2] to the Load line. As can be seen in the timing diagram, two sequential bytes are sent from the ATmega328 to select the appropriate DAC channel and to provide updated data to the DAC. The Load line is pulsed low to update the DAC.

We provide both an externally generated interrupt event and also one generated from within the microcontroller. For each type of interrupt, we illustrate how to program it in C and also with the Arduino Development Environment built-in features. For the C examples, we use the ImageCraft ICC AVR compiler. The ImageCraft ICC AVR compiler uses the following syntax to link an interrupt service routine to the correct interrupt vector address: #pragma interrupt_handler timer_handler:4 void timer_handler(void) { : : } As you can see, the #pragma with the reserved word interrupt_handler is used to communicate to the compiler that the routine name that follows is an interrupt service routine.

115 116 5. 8. EXAMPLE: ADC RAIN GAGE INDICATOR digitalWrite(LED3, LOW); digitalWrite(LED4, LOW); digitalWrite(LED5, LOW); digitalWrite(LED6, LOW); digitalWrite(LED7, LOW); } else if(trim_pot_reading < 256) { digitalWrite(LED0, HIGH); digitalWrite(LED1, HIGH); digitalWrite(LED2, LOW); digitalWrite(LED3, LOW); digitalWrite(LED4, LOW); digitalWrite(LED5, LOW); digitalWrite(LED6, LOW); digitalWrite(LED7, LOW); } else if(trim_pot_reading < 384) { digitalWrite(LED0, HIGH); digitalWrite(LED1, HIGH); digitalWrite(LED2, HIGH); digitalWrite(LED3, LOW); digitalWrite(LED4, LOW); digitalWrite(LED5, LOW); digitalWrite(LED6, LOW); digitalWrite(LED7, LOW); } else if(trim_pot_reading < 512) { digitalWrite(LED0, HIGH); digitalWrite(LED1, HIGH); digitalWrite(LED2, HIGH); digitalWrite(LED3, HIGH); digitalWrite(LED4, LOW); digitalWrite(LED5, LOW); digitalWrite(LED6, LOW); digitalWrite(LED7, LOW); } 117 118 5.

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