NU32v2: Introduction to the PIC32 - Revision history

Lynch at 11:23, 16 January 2016

2016-01-16T11:23:25Z

Lynch: /* Further Reading */

2011-03-26T17:28:15Z

Lynch at 12:08, 25 January 2011

2011-01-25T12:08:42Z

NickMarchuk: /* NU32v2 Development Board Overview */

2011-01-20T16:58:59Z

NU32v2 Development Board Overview

Lynch: /* PIC32 Hardware Overview */

2011-01-13T18:14:31Z

PIC32 Hardware Overview

NickMarchuk at 16:17, 13 January 2011

2011-01-13T16:17:33Z

NickMarchuk at 16:16, 13 January 2011

2011-01-13T16:16:37Z

Lynch: /* NU32v2 Development Board Overview */

2011-01-13T01:05:10Z

NU32v2 Development Board Overview

Lynch: /* NU32v2 Development Board Overview */

2011-01-13T01:04:46Z

NU32v2 Development Board Overview

Lynch: /* NU32v2 Development Board Overview */

2011-01-13T01:04:36Z

NU32v2 Development Board Overview

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+'''THIS PAGE REFERS TO A PRE-RELEASE VERSION OF THE NU32 PIC32 DEVELOPMENT BOARD.  FOR INFORMATION, SAMPLE CODE, AND VIDEOS RELATED TO THE PRODUCTION VERSION (2016 AND LATER), AND TO THE CORRESPONDING BOOK "EMBEDDED COMPUTING AND MECHATRONICS WITH THE PIC32 MICROCONTROLLER," VISIT [[NU32|THE NU32 PAGE]].'''
 [[Image:nu32v2_complete.jpg|thumb|500px|The NU32v2 board that breaks out the PIC32MX795F512L.  The board spans two breadboards and preloads the middle rails with GND, 3.3V, 5V, and the voltage input to the power jack.  The push button in the breadboard between GND and G6 is required enter the bootloader mode.|right]]
 The [http://www.microchip.com/en_US/family/pic32/ Microchip PIC32] is a family of complex and powerful microcontrollers that can be purchased for less than $10 in quantities of one.  This microcontroller offers many peripherals useful for mechatronics purposes, such as several channels for analog-to-digital conversion, digital I/O, synchronous and asynchronous serial communication, pulse width modulation, etc.  For our purposes, the primary advantages of the 32-bit PICs over the 8-bit PICs we have used in the past are that they are faster (max clock rate of 80 MHz compared to 40 MHz), have more peripherals available, offer more program memory (flash) and data memory (RAM), and have significantly more computational horsepower due to the 32-bit address and data buses and single-cycle multiply for 32-bit math.  The primary disadvantages are that they come only in surface mount packages, making them harder to work with for fast prototyping compared to the DIP (dual-inline packages) 8-bit PICs that can be plugged into a breadboard; and they must be powered by 2.3-3.6 V, unlike the 5 V of DIP 8-bit PICs and some DIP chips we would like to interface with.  (Of course surface mount and lower operating voltages are vastly superior for commercial embedded products, and we will find ways to work around the disadvantages mentioned.)

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 = Further Reading =
-There are many references out there to learn more about the hardware and programming of the PIC32.  Some of these are more accessible than others.  A good book that discusses both the hardware and programming of the PIC32 at an introductory to intermediate level is DiJasio's [http://www.amazon.com/Programming-32-bit-Microcontrollers-Exploring-Technology/dp/0750687096 Programming 32-bit Microcontrollers in C:  Exploring the PIC32].  It was published in 2008, soon after PIC32's were released.  It does not make use of many peripheral library functions, but instead provides low-level code to develop your own libraries.  Still, it is a good first book to understand how the PIC32 works.
+You can find some code snippets and circuit suggestions [[Microchip PICs|here]].  There are many references out there to learn more about the hardware and programming of the PIC32.  Some of these are more accessible than others.  A good book that discusses both the hardware and programming of the PIC32 at an introductory to intermediate level is DiJasio's [http://www.amazon.com/Programming-32-bit-Microcontrollers-Exploring-Technology/dp/0750687096 Programming 32-bit Microcontrollers in C:  Exploring the PIC32].  It was published in 2008, soon after PIC32's were released.  It does not make use of many peripheral library functions, but instead provides low-level code to develop your own libraries.  Still, it is a good first book to understand how the PIC32 works.
 The most useful Microchip reference documents are:

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 *[[NU32v2: Software to Install]],
 *[[NU32v2: Starting a New Project]], and
-*[[NU32v2: The NU32v2 Serial Bootloader and PC Application]]
+*[[NU32v2: A Detailed Look at Programming the PIC32]]
 pages for information specific to programming the NU32v2.

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 Here is a [[Media:NU32v2BoardSchematic.pdf|schematic]] of the NU32v2 development board, showing how the PIC32MX795F512L is used on the board, and showing which pins are made available to the user.  The board layout is shown at right as and can be clicked on to view a high resolution image.  It is also available as a [[Media:NU32v2BoardLayout.pdf|pdf file]].  The mapping from the 88 pins on the NU32v2 board to pins on the PIC32 is also shown in the figure below.  In total, 82 PIC32 I/O pins are carried to the NU32v2 board pins.
+Some of the features of the NU32v2 board are highlighted in [[Media:NU32v2_hardware_details.jpg|this image.]]
 Options for powering the NU32 board:

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 [[Image:PIC32MX795F512L-pinout.png|thumb|200px|Pinout of the PIC32MX795F512L.|right]]
-Our PIC32MX795F512L features a max clock frequency of 80 MHz, 512K program memory (flash), 128K data memory (RAM), multiple interrupt sources and handling routines, 16 10-bit analog-to-digital input channels, many digital I/O channels (with outputs that can be configured for open-drain), USB 2.0, Ethernet, five I2C and four SPI synchronous serial communication modules, six UARTs for RS-232 or RS-485 asynchronous serial communication, five 16-bit counter/timers (configurable to give two 32-bit timers), five pulse-width modulation outputs, and a number of pins that can generate interrupts based on external signals, among other features.  This PIC has 100 pins.
+Our PIC32MX795F512L features a max clock frequency of 80 MHz, 512K program memory (flash), 128K data memory (RAM), multiple interrupt sources and handling routines, 16 10-bit analog-to-digital input lines (multiplexed to a single ADC), many digital I/O channels (with outputs that can be configured for open-drain), USB 2.0, Ethernet, five I2C and four SPI synchronous serial communication modules, six UARTs for RS-232 or RS-485 asynchronous serial communication, five 16-bit counter/timers (configurable to give two 32-bit timers), five pulse-width modulation outputs, and a number of pins that can generate interrupts based on external signals, among other features.  This PIC has 100 pins.
 To cram this much functionality into 100 pins, many of the pins serve multiple functions.  For example, pin 20 can serve as a comparator input, an analog input, a change notification input which can generate an interrupt when the pin changes state, or a digital input or output.  Which function a particular pin serves is determined by "Special Function Registers" (SFRs) that contain configuration bits specifying the desired use of the pin.  Typically your program sets these configuration bits at the beginning of execution, and the functions of the pins are fixed while your program runs.  (It is possible, though rarely needed, to change the configuration bits and change the function of pins on the fly.)

← Older revision		Revision as of 16:17, 13 January 2011
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	[[Image:nu32v2_complete.jpg\|thumb\|500px\|The NU32v2 board that breaks out the PIC32MX795F512L. The board spans two breadboards and preloads the middle rails with GND, 3.3V, 5V, and the voltage input to the power jack. The push button in the breadboard between GND and G6 is required ~~for~~ the bootloader.\|right]]		[[Image:nu32v2_complete.jpg\|thumb\|500px\|The NU32v2 board that breaks out the PIC32MX795F512L. The board spans two breadboards and preloads the middle rails with GND, 3.3V, 5V, and the voltage input to the power jack. The push button in the breadboard between GND and G6 is required enter the bootloader mode.\|right]]
	The [http://www.microchip.com/en_US/family/pic32/ Microchip PIC32] is a family of complex and powerful microcontrollers that can be purchased for less than $10 in quantities of one. This microcontroller offers many peripherals useful for mechatronics purposes, such as several channels for analog-to-digital conversion, digital I/O, synchronous and asynchronous serial communication, pulse width modulation, etc. For our purposes, the primary advantages of the 32-bit PICs over the 8-bit PICs we have used in the past are that they are faster (max clock rate of 80 MHz compared to 40 MHz), have more peripherals available, offer more program memory (flash) and data memory (RAM), and have significantly more computational horsepower due to the 32-bit address and data buses and single-cycle multiply for 32-bit math. The primary disadvantages are that they come only in surface mount packages, making them harder to work with for fast prototyping compared to the DIP (dual-inline packages) 8-bit PICs that can be plugged into a breadboard; and they must be powered by 2.3-3.6 V, unlike the 5 V of DIP 8-bit PICs and some DIP chips we would like to interface with. (Of course surface mount and lower operating voltages are vastly superior for commercial embedded products, and we will find ways to work around the disadvantages mentioned.)		The [http://www.microchip.com/en_US/family/pic32/ Microchip PIC32] is a family of complex and powerful microcontrollers that can be purchased for less than $10 in quantities of one. This microcontroller offers many peripherals useful for mechatronics purposes, such as several channels for analog-to-digital conversion, digital I/O, synchronous and asynchronous serial communication, pulse width modulation, etc. For our purposes, the primary advantages of the 32-bit PICs over the 8-bit PICs we have used in the past are that they are faster (max clock rate of 80 MHz compared to 40 MHz), have more peripherals available, offer more program memory (flash) and data memory (RAM), and have significantly more computational horsepower due to the 32-bit address and data buses and single-cycle multiply for 32-bit math. The primary disadvantages are that they come only in surface mount packages, making them harder to work with for fast prototyping compared to the DIP (dual-inline packages) 8-bit PICs that can be plugged into a breadboard; and they must be powered by 2.3-3.6 V, unlike the 5 V of DIP 8-bit PICs and some DIP chips we would like to interface with. (Of course surface mount and lower operating voltages are vastly superior for commercial embedded products, and we will find ways to work around the disadvantages mentioned.)

← Older revision		Revision as of 16:16, 13 January 2011
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	[[Image:nu32v2_complete.jpg\|thumb\|500px\|The NU32v2 board that breaks out the PIC32MX795F512L -> ~~Currently~~ ~~shows~~ ~~version~~ 0.1, ~~need~~ to ~~update~~ ~~picture~~ ~~when~~ ~~final~~ ~~version~~ is ~~delivered~~.\|right]]		[[Image:nu32v2_complete.jpg\|thumb\|500px\|The NU32v2 board that breaks out the PIC32MX795F512L. The board spans two breadboards and preloads the middle rails with GND, 3.3V, 5V, and the voltage input to the power jack. The push button in the breadboard between GND and G6 is required for the bootloader.\|right]]
	The [http://www.microchip.com/en_US/family/pic32/ Microchip PIC32] is a family of complex and powerful microcontrollers that can be purchased for less than $10 in quantities of one. This microcontroller offers many peripherals useful for mechatronics purposes, such as several channels for analog-to-digital conversion, digital I/O, synchronous and asynchronous serial communication, pulse width modulation, etc. For our purposes, the primary advantages of the 32-bit PICs over the 8-bit PICs we have used in the past are that they are faster (max clock rate of 80 MHz compared to 40 MHz), have more peripherals available, offer more program memory (flash) and data memory (RAM), and have significantly more computational horsepower due to the 32-bit address and data buses and single-cycle multiply for 32-bit math. The primary disadvantages are that they come only in surface mount packages, making them harder to work with for fast prototyping compared to the DIP (dual-inline packages) 8-bit PICs that can be plugged into a breadboard; and they must be powered by 2.3-3.6 V, unlike the 5 V of DIP 8-bit PICs and some DIP chips we would like to interface with. (Of course surface mount and lower operating voltages are vastly superior for commercial embedded products, and we will find ways to work around the disadvantages mentioned.)		The [http://www.microchip.com/en_US/family/pic32/ Microchip PIC32] is a family of complex and powerful microcontrollers that can be purchased for less than $10 in quantities of one. This microcontroller offers many peripherals useful for mechatronics purposes, such as several channels for analog-to-digital conversion, digital I/O, synchronous and asynchronous serial communication, pulse width modulation, etc. For our purposes, the primary advantages of the 32-bit PICs over the 8-bit PICs we have used in the past are that they are faster (max clock rate of 80 MHz compared to 40 MHz), have more peripherals available, offer more program memory (flash) and data memory (RAM), and have significantly more computational horsepower due to the 32-bit address and data buses and single-cycle multiply for 32-bit math. The primary disadvantages are that they come only in surface mount packages, making them harder to work with for fast prototyping compared to the DIP (dual-inline packages) 8-bit PICs that can be plugged into a breadboard; and they must be powered by 2.3-3.6 V, unlike the 5 V of DIP 8-bit PICs and some DIP chips we would like to interface with. (Of course surface mount and lower operating voltages are vastly superior for commercial embedded products, and we will find ways to work around the disadvantages mentioned.)

← Older revision		Revision as of 01:05, 13 January 2011
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	[[Image:NU32v2Pinout.png\|thumb\|~~600px~~\|center]]		[[Image:NU32v2Pinout.png\|thumb\|700px\|center]]

← Older revision		Revision as of 01:04, 13 January 2011
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	[[Image:NU32v2Pinout.png\|thumb\|600px\|~~right~~]]		[[Image:NU32v2Pinout.png\|thumb\|600px\|center]]