Pico-SPE
Overview
The Pico-SPE is a small, low-cost, versatile boards from KWS Computersysteme Gmbh. They are equipped with an RP2040 SoC, an on-board LED, a USB connector, an SWD interface. The Pico-SPE additionally contains an Microchip LAN8651 10Base-T1S module. The USB bootloader allows the ability to flash without any adapter, in a drag-and-drop manner. It is also possible to flash and debug the boards with their SWD interface, using an external adapter.
Hardware
Dual core Arm Cortex-M0+ processor running up to 133MHz
264KB on-chip SRAM
16MB on-board QSPI flash with XIP capabilities
16 GPIO pins
3 Analog inputs
2 UART peripherals
2 I2C controllers
16 PWM channels
USB 1.1 controller (host/device)
8 Programmable I/O (PIO) for custom peripherals
On-board LED
1 Watchdog timer peripheral
Microchip LAN8651 10Base-T1S
Supported Features
The pico_spe board supports the hardware features listed below.
- on-chip / on-board
- Feature integrated in the SoC / present on the board.
- 2 / 2
-
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files. -
vnd,foo -
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M0+ CPU2 |
|
ADC |
on-chip |
Raspberry Pi Pico ADC1 |
|
Clock control |
on-chip |
Raspberry Pi Pico clock controller node1 |
|
on-chip |
|||
on-chip |
The representation of Raspberry Pi Pico’s PLL2 |
||
on-chip |
The representation of Raspberry Pi Pico ring oscillator1 |
||
on-chip |
The representation of Raspberry Pi Pico external oscillator1 |
||
Counter |
on-chip |
Raspberry Pi Pico timer1 |
|
DMA |
on-chip |
Raspberry Pi Pico DMA1 |
|
Ethernet |
on-board |
LAN865x standalone 10BASE-T1L Ethernet controller with SPI interface1 |
|
on-board |
Microchip’s 10BASE-T1S PHYs support1 |
||
Flash controller |
on-chip |
Raspberry Pi Pico flash controller1 |
|
GPIO & Headers |
on-chip |
Raspberry Pi Pico GPIO1 |
|
on-chip |
Raspberry Pi Pico GPIO Port1 |
||
on-board |
GPIO pins exposed on Raspberry Pi Pico headers1 |
||
I2C |
on-chip |
||
Interrupt controller |
on-chip |
ARMv6-M NVIC (Nested Vectored Interrupt Controller) controller1 |
|
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
on-board |
Group of PWM-controlled LEDs1 |
||
Miscellaneous |
on-chip |
Raspberry Pi Pico PIO2 |
|
MTD |
on-chip |
Flash node1 |
|
on-board |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
Pin control |
on-chip |
Raspberry Pi Pico Pin Controller1 |
|
PWM |
on-chip |
Raspberry Pi Pico PWM1 |
|
Regulator |
on-chip |
Raspberry Pi Pico core supply regurator1 |
|
Reset controller |
on-chip |
Raspberry Pi Pico Reset Controller1 |
|
RTC |
on-chip |
Raspberry Pi Pico RTC1 |
|
Sensors |
on-chip |
Raspberry Pi Pico family temperature sensor node1 |
|
Serial controller |
on-chip |
||
SPI |
on-chip |
||
SRAM |
on-chip |
Generic on-chip SRAM1 |
|
Timer |
on-chip |
ARMv6-M System Tick1 |
|
USB |
on-chip |
Raspberry Pi Pico USB Device Controller1 |
|
Watchdog |
on-chip |
Raspberry Pi Pico Watchdog1 |
Pin Mapping
The peripherals of the RP2040 SoC can be routed to various pins on the board. The configuration of these routes can be modified through DTS. Please refer to the datasheet to see the possible routings for each peripheral.
External pin mapping on the Pico-SPE is identical to the Pico, but note that internal RP2040 GPIO lines 10, 11, 12, 13, 20, 21 are routed to the Microchip LAN8651 on the Pico-SPE.
Default Zephyr Peripheral Mapping:
UART0_TX : P0
UART0_RX : P1
I2C0_SDA : P4
I2C0_SCL : P5
I2C1_SDA : P6
I2C1_SCL : P7
ADC_CH0 : P26
ADC_CH1 : P27
ADC_CH2 : P28
Programmable I/O (PIO)
The RP2040 SoC comes with two PIO periherals. These are two simple co-processors that are designed for I/O operations. The PIOs run a custom instruction set, generated from a custom assembly language. PIO programs are assembled using pioasm, a tool provided by Raspberry Pi.
Zephyr does not (currently) assemble PIO programs. Rather, they should be manually assembled and embedded in source code. An example of how this is done can be found at drivers/serial/uart_rpi_pico_pio.c.
Sample: SPI via PIO
The BME280 humidity and pressure sensor sample includes a demonstration of using the PIO SPI driver to communicate with an environmental sensor. The PIO SPI driver supports using any combination of GPIO pins for an SPI bus, as well as allowing up to four independent SPI buses on a single board (using the two SPI devices as well as both PIO devices).
Programming and Debugging
The pico_spe board supports the runners and associated west commands listed below.
| flash | debug | attach | rtt | debugserver | |
|---|---|---|---|---|---|
| blackmagicprobe | ✅ | ✅ | ✅ | ||
| jlink | ✅ | ✅ | ✅ | ✅ | ✅ |
| openocd | ✅ (default) | ✅ (default) | ✅ | ✅ | ✅ |
| pyocd | ✅ | ✅ | ✅ | ✅ | ✅ |
| uf2 | ✅ |
The SWD interface can be used to program and debug the device, e.g. using OpenOCD with the Raspberry Pi Debug Probe .
The overall explanation regarding flashing and debugging is the same as for Raspberry Pi Pico. Refer to Programming and Debugging for more information. N.b. OpenOCD support requires using Raspberry Pi’s forked version of OpenOCD.
Below is an example of building and flashing the Blinky application.
# From the root of the zephyr repository
west build -b pico_spe samples/basic/blinky
west flash --openocd /usr/local/bin/openocd