Digilent 410-273P-KIT Manuel d'utilisateur télécharger pdf (Page 13)

WF32 Reference Manual

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Page 13 of 24

On Arduino boards, the corresponding connector is also used as an in-system programming connector as well as

providing access to some of the SPI signals. On Arduino boards, pin 5 of this connector is connected to the reset

net.

Some Arduino shields, most notably the Ethernet shield, connect pin 5 to the reset net on pin 3 of connector J3.

This causes the processor to be reset each time an attempt is made to access the SPI port. Jumper JP8 can be used

to break the connection between J10 pin 5 and reset when using Arduino shields that make this connection. JP8

has a cut-able trace on the top of the board that can be cut to break the connection between SPI SS and reset. JP8

is not loaded at the factory. To restore the connection, solder a two pin header at the JP8 position and install a

shorting block.

A reset button is located to the right of the MRF24WG0MA WiFi module. Pressing this button resets the PIC32

microcontroller.

11 Microchip Development Tool Compatibility

In addition to being used with the MPIDE, the WF32 board can be used as a more traditional microcontroller

development board using Microchip Development Tools.

Unloaded connector JP2 on the right side of the MRF24WG0MA WiFi module is used to connect to a Microchip

development tool, such as the PICkit™3. The holes for JP2 are staggered so that a standard 100-mil spaced 6-pin

header can fit to the board without the need to solder it in place. Any Microchip development tool that supports

the PIC32 microcontroller family, and that can be connected via the same 6-pin ICSP interface as the PICkit™3, can

be used.

Typically, a standard male connector and a 6-pin cable is used with JP2 so that a PICkit™3 can be attached to the

WF32 board.

The Digilent chipKIT PGM can also be used in place of a PICkit3 to program the WF32 with the Microchip

Development tools. The chipKIT PGM has a smaller form factor and does not need a 6-pin cable to connect to JP2.

The Microchip MPLAB

IDE or the MPLAB

X IDE can be used to program and debug code running on the WF32

board. These programs can be downloaded from the Microchip web site.

Using the Microchip development tools to program the WF32 board will cause the boot loader to be erased. To

use the board with the MPIDE again, it is necessary to program the boot loader back onto the board. The boot

loader source code and compiled image can be found at www.chipKIT.net.

12 Pinout Tables

The following tables show the relationship between the chipKIT digital pin numbers, the connector pin numbers

and the microcontroller pin numbers.

In the following tables, columns labeled chipKIT pin # refer to the digital pin number. This is the value that is

passed to the pinMode(), digitalRead(), digitalWrite() and other functions to refer to the pin.

For most pins, this pin number will agree with the pin number labeled on the board. For the pins whose function

can be switched using jumpers, the pin number labeled on the board is correct when the jumper is in the “normal”

position.

For example: The normal position for JP3 is the PWM position. The digital pin number for the microcontroller

signal PWM is 10. With JP3 in the PWM position, digital pin 10 is connected to the pin labeled 10 on the board. The

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Digilent 410-273P-KIT Manuel d'utilisateur Page 13

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