===============================
W5500-EVB-Pico
===============================
.. tags:: chip:rp2040, ethernet
The `W5500-EVB-Pico `_
is a microcontroller evaluation board based on the Raspberry Pi RP2040 and fully
hardwired TCP/IP controller W5500 – and basically works the same as Raspberry Pi
Pico board but with additional Ethernet via W5500.
.. figure:: W5500-EVB-Pico.png
:align: center
Features
========
* RP2040 microcontroller chip
* Dual-core ARM Cortex M0+ processor, flexible clock running up to 133 MHz
* 264kB of SRAM, and 2MB of on-board Flash memory
* Castellated module allows soldering direct to carrier boards
* USB 1.1 Host and Device support
* Low-power sleep and dormant modes
* Drag & drop programming using mass storage over USB
* 26 multi-function GPIO pins
* 2× SPI, 2× I2C, 2× UART, 3× 12-bit ADC, 16× controllable PWM channels
* Accurate clock and timer on-chip
* Temperature sensor
* Accelerated floating point libraries on-chip
* 8 × Programmable IO (PIO) state machines for custom peripheral support
* Ethernet port via WIZnet W5500, hardwired to SPI0 and two GPIO pins.
Buttons and LEDs
================
User LED controlled by GPIO25.
A BOOTSEL button, which if held down when power is first
applied to the board, will cause the RP2040 to boot into programming
mode and appear as a storage device to a computer connected via USB.
Saving a .UF2 file to this device will replace the Flash ROM contents
on the RP2040.
Pin Mapping
===========
Pads numbered anticlockwise from USB connector.
===== ========== ==========
Pad Signal Notes
===== ========== ==========
1 GPIO0 Default TX for UART0 serial console
2 GPIO1 Default RX for UART1 serial console
3 Ground
4 GPIO2
5 GPIO3
6 GPIO4
7 GPIO5
8 Ground
9 GPIO6
10 GPIO7
11 GPIO8
12 GPIO9
13 Ground
14 GPIO10
15 GPIO11
16 GPIO12
17 GPIO13
18 Ground
19 GPIO14
20 GPIO15
21 GPIO16 W5500 MISO
22 GPIO17 W5500 CSn
23 Ground
24 GPIO18 W5500 SCLK
25 GPIO19 W5500 MOSI
26 GPIO20 W5500 RSTn
27 GPIO21 W5500 INTn
28 Ground
29 GPIO22
30 Run
31 GPIO26 ADC0
32 GPIO27 ADC1
33 AGND Analog Ground
34 GPIO28 ADC2
35 ADC_VREF
36 3V3 Power output to peripherals
37 3V3_EN Pull to ground to turn off.
38 Ground
39 VSYS +5V Supply to board
40 VBUS Connected to USB +5V
===== ========== ==========
Other RP2040 Pins
=================
====== ==========
Signal Notes
====== ==========
GPIO23 Output - Power supply control.
GPIO24 Input - High if USB port or Pad 40 supplying power.
GPIO25 Output - On board LED.
ADC3 Input - Analog voltage equal to one third of VSys voltage.
====== ==========
Separate pins for the Serial Debug Port (SDB) are available
Power Supply
============
The W5500-EVB-Pico can be powered via the USB connector,
or by supplying +5V to pin 39. The board had a diode that prevents
power from pin 39 from flowing back to the USB socket, although
the socket can be power via pin 30.
The W5500-EVB-Pico chip run on 3.3 volts. This is supplied
by an onboard voltage regulator. This regulator can be disabled
by pulling pin 37 to ground.
The regulator can run in two modes. By default the regulator runs
in PFM mode which provides the best efficiency, but may be
switched to PWM mode for improved ripple by outputting a one
on GPIO23.
Installation & Build
====================
For instructions on how to to install the build dependencies and create a NuttX
image for this board, consult the main :doc:`RP2040 documentation
<../../index>`.
Configurations
==============
All configurations listed below can be configured using the following command in
the ``nuttx`` directory (again, consult the main :doc:`RP2040 documentation
<../../index>`):
.. code:: console
$ ./tools/configure.sh w5500-evb-pico:
usbnsh
------
USB CDC/ACM serial console with NuttShell. TCP/IPv4 & IPv6 networking is
supported via the Ethernet port.