NU32: Introduction to the PIC32 - Revision history

Lynch at 11:33, 16 January 2016

2016-01-16T11:33:23Z

Lynch: /* NU32 Development Board Overview */

2012-01-19T09:49:04Z

NU32 Development Board Overview

Lynch: /* NU32 Development Board Overview */

2012-01-19T09:28:47Z

NU32 Development Board Overview

NickMarchuk at 21:28, 27 December 2011

2011-12-27T21:28:01Z

NickMarchuk: /* NU32 Development Board Overview */

2011-12-27T21:24:02Z

NU32 Development Board Overview

NickMarchuk: /* NU32 Development Board Overview */

2011-12-27T21:15:10Z

NU32 Development Board Overview

NickMarchuk: /* NU32 Development Board Overview */

2011-12-27T21:14:01Z

NU32 Development Board Overview

NickMarchuk: /* NU32 Development Board Overview */

2011-12-27T19:15:59Z

NU32 Development Board Overview

NickMarchuk: /* NU32 Development Board Overview */

2011-12-27T19:15:18Z

NU32 Development Board Overview

NickMarchuk: /* NU32 Development Board Overview */

2011-12-27T19:14:30Z

NU32 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:NU32_1.jpg|thumb|500px|The NU32 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 (~6V).  The USER push button is required to 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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 '''NOT RECOMMENDED:'''  * Short the bare pads on the bottom of the board to bypass the 5V regulator and use the 5V from your computer to power the board.  The USB cable provides up to 500 mA.  '''IF YOU USE THIS METHOD, COVER THE POWER JACK WITH TAPE SO THAT YOU DO NOT ACCIDENTALLY PLUG IN AN EXTERNAL POWER SUPPLY'''
-'''Note on using the 3.3V and 5V output pins:'''  The DC power supply that comes with the NU32 kit provides ~6V at about 1000 mA total.  Take this into account when you decide how much current to try to draw from these pins.  Even if the NU32 board is powered by a higher-current supply, such as a battery or a higher voltage wall-powered adapter brick, keep in mind that the onboard 5V and 3.3V regulator can only source approximately 800 mA.  You should not try to draw more than, say, half that.  Usual rule of thumb:  don't try to drive motors, which often draw hundreds of mA, up to a few amps in typical ME 333 applications, using current flowing through your NU32 board.  '''THE VOLTAGE REGULATORS WILL BE WARM, AND WILL GET HOT AS YOU DRAW MORE CURRENT.'''  This is normal, but take care to not draw too much current from your 5V or 3.3V rails.
+'''Note on using the 3.3V and 5V output pins:'''  The DC power supply that comes with the NU32 kit provides ~6V at about 1000 mA total.  Take this into account when you decide how much current to try to draw from these pins.  Even if the NU32 board is powered by a higher-current supply, such as a battery, keep in mind that the onboard 5V and 3.3V regulator can only source approximately 800 mA.  You should not try to draw more than, say, half that.  Usual rule of thumb:  don't try to drive motors, which often draw hundreds of mA, up to a few amps in typical ME 333 applications, using current flowing through your NU32 board.  '''THE VOLTAGE REGULATORS WILL BE WARM, AND WILL GET HOT AS YOU DRAW MORE CURRENT.'''  This is normal, but take care to not draw too much current from your 5V or 3.3V rails.
 <br clear=all>

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 [[Image:NU32_BoardLayout.png|thumb|200px|Layout of the NU32 development board.|right]]
-Here is a [[Media:NU32_sch.pdf|schematic]] of the NU32 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:NU32_pcb.pdf|pdf file]].  The mapping from the 88 pins on the NU32 board to pins on the PIC32 is also shown in the figure below.  In total, 82 PIC32 I/O pins are carried to the NU32 board pins.
+Here is a [[Media:NU32_sch.pdf|schematic]] of the NU32 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:NU32_pcb.pdf|pdf file]].  The mapping from the 84 pins on the NU32 board to pins on the PIC32 is also shown in the figure below.  In total, 82 PIC32 I/O pins are carried to the NU32 board pins.
 Some of the features of the NU32 board are highlighted in [[Media:NU32_features.png|this image.]]

@@ Line 2: / Line 2: @@
 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.)
-Particular numbers referenced on this page refer to the [http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en545660 PIC32MX795F512L] chip, which is the PIC32 used on the NU32 board. (You may wish to compare the capabilities of our PIC to others on [http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=211&mid=10&lang=en&pageId=74 the Microchip PIC32 parametric table].) The NU32 development board is shown on the right.  The NU32 board was designed by Nick Marchuk to easily plug into two standard prototyping breadboards, allowing easy prototyping with the PIC32.  The NU32 board also has two voltage regulators, a DC input jack, a USB connector, an FT2232 dual serial-to-USB converter, USER and RESET push buttons, and two LEDs to allow you to get up and running quickly with only the assembled NU32 board, a USB cable, a DC power supply, and a computer with free software (once a "bootloader" is installed on the PIC to allow you to program it from your computer).  The NU32 board was created with inspiration from the [http://www.sparkfun.com/commerce/product_info.php?products_id=8971 UBW32 board] and the NU32vX's designed by NU graduate student Andy Long and Nick Marchuk.
+Particular numbers referenced on this page refer to the [http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en545660 PIC32MX795F512L] chip, which is the PIC32 used on the NU32 board. (You may wish to compare the capabilities of our PIC to others on [http://www.microchip.com/ParamChartSearch/chart.aspx?branchID=211&mid=10&lang=en&pageId=74 the Microchip PIC32 parametric table].) The NU32 development board is shown on the right.  The NU32 board was designed by Nick Marchuk to easily plug into two standard prototyping breadboards, allowing easy prototyping with the PIC32.  The NU32 board also has two voltage regulators, a DC input jack, a USB connector, an FT2232 dual serial-to-USB converter, USER and RESET push buttons, and two LEDs to allow you to get up and running quickly with only the assembled NU32 board, a USB cable, a DC power supply, and a computer with free software (once a "bootloader" is installed on the PIC to allow you to program it from your computer).  The NU32 board was created with inspiration from the [http://www.schmalzhaus.com/UBW32/ UBW32 board] and the NU32vX's designed by NU graduate student Andy Long and Nick Marchuk.
 The purpose of this page is to provide a brief overview of PIC32 and NU32 hardware.  Microchip provides many reference manuals, data sheets, application notes, and sample software, and there are many other helpful web resources to take you further.

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 Options for powering the NU32 board:
-* Plug a power jack (2.1 mm ID, 5.5 mm OD, center positive, >6V, <16V) into the barrel connector on the board and slide the power switch to side labeled 'ON' (toward the USB connector side of the board).
+* Plug a power jack (2.1 mm ID, 5.5 mm OD, center positive, >6V, <16V) into the barrel connector on the board and slide the power switch to side toward the USB connector side of the board.
-'''NOT RECOMMENDED:'''  * '''Short the bare pads on the bottom of the board to bypass the 5V regulator and use the 5V from your computer to power the board.  The USB cable provides a typical current supply of around 500 mA.  IF YOU USE THIS METHOD, COVER THE POWER JACK WITH TAPE SO THAT YOU DO NOT ACCIDENTALLY PLUG IN AN EXTERNAL POWER SUPPLY'''
+'''NOT RECOMMENDED:'''  * Short the bare pads on the bottom of the board to bypass the 5V regulator and use the 5V from your computer to power the board.  The USB cable provides up to 500 mA.  '''IF YOU USE THIS METHOD, COVER THE POWER JACK WITH TAPE SO THAT YOU DO NOT ACCIDENTALLY PLUG IN AN EXTERNAL POWER SUPPLY'''
-'''Note on using the 3.3V and 5V output pins:'''  The DC power supply that comes with the NU32 kit provides ~6V at about 1000 mA total.  Take this into account when you decide how much current to try to draw from these pins.  Even if the NU32 board is powered by a higher-current supply, such as a battery or a higher voltage wall-powered adapter brick, keep in mind that the onboard 5V and 3.3V regulator can only source approximately 800 mA.  You should not try to draw more than, say, half that.  Usual rule of thumb:  don't try to drive motors, which often draw hundreds of mA, up to a few amps in typical ME 333 applications, using current flowing through your NU32 board.  '''THE VOLTAGE REGULATORS WILL BE WARM, AND WILL GET HOT AS YOU DRAW MORE CURRENT.  This is normal, but take care to not draw too much current from your 5V or 3.3V rails.'''
+'''Note on using the 3.3V and 5V output pins:'''  The DC power supply that comes with the NU32 kit provides ~6V at about 1000 mA total.  Take this into account when you decide how much current to try to draw from these pins.  Even if the NU32 board is powered by a higher-current supply, such as a battery or a higher voltage wall-powered adapter brick, keep in mind that the onboard 5V and 3.3V regulator can only source approximately 800 mA.  You should not try to draw more than, say, half that.  Usual rule of thumb:  don't try to drive motors, which often draw hundreds of mA, up to a few amps in typical ME 333 applications, using current flowing through your NU32 board.  '''THE VOLTAGE REGULATORS WILL BE WARM, AND WILL GET HOT AS YOU DRAW MORE CURRENT.'''  This is normal, but take care to not draw too much current from your 5V or 3.3V rails.
 <br clear=all>

← Older revision		Revision as of 21:15, 27 December 2011
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	[[Image:NU32_pinout.png\|thumb\|700px\|center]]		[[Image:NU32_pinout.png\|thumb\|700px\|center\|[[Media:NU32_pinout.pdf\|Here is a searchable pdf of this image.]]]]

	[[Media:NU32_pinout.pdf\|Here is a searchable pdf of this image.]]

← Older revision		Revision as of 21:14, 27 December 2011
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	[[Image:NU32_pinout.png\|thumb\|700px\|center]]		[[Image:NU32_pinout.png\|thumb\|700px\|center]]
			[[Media:NU32_pinout.pdf\|Here is a searchable pdf of this image.]]

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-[[Image:NU32v2Pinout.png|thumb|700px|center]]
+[[Image:NU32_pinout.png|thumb|700px|center]]
-<table>
-<tr><td>GND</td><td>x</td><td>GND</td><td>blank</td><td><C4></td><td>x</td><td>C4</td></tr>
-</table>