現貨Espruino Pico (pinned)購買推薦價格代理露天

33mm x 15mm (1.3 x 0.6 inch)
22 GPIO pins : 9 Analogs inputs, 21 PWM, 2 Serial, 3 SPI, 3 I2C
All GPIO is 5 volt tolerant (Arduino compatible)
2 rows of 9 0.1” pins, with a third 0.05” row of 8 pins on the end
On-board USB Type A connector
Two on-board LEDs and one button.
STM32F401CDU6 CPU - ARM Cortex M4, 384kb flash, 96kb RAM
On-board 3.3v 250mA voltage regulator, accepts voltages from 3.5v to 16v
Current draw in sleep: < 0.05mA - over 2.5 years on a 2500mAh battery
On-board FET can be used to drive high-current outputs

代號

SKU 即原廠標號

定價

~~1,200~~

特價

有庫存

原廠連結：http://www.espruino.com/Pico

FEATURES

33mm x 15mm (1.3 x 0.6 inch)
22 GPIO pins : 9 Analogs inputs, 21 PWM, 2 Serial, 3 SPI, 3 I2C
All GPIO is 5 volt tolerant (Arduino compatible)
2 rows of 9 0.1" pins, with a third 0.05" row of 8 pins on the end
On-board USB Type A connector
Two on-board LEDs and one button.
STM32F401CDU6 CPU - ARM Cortex M4, 384kb flash, 96kb RAM
On-board 3.3v 250mA voltage regulator, accepts voltages from 3.5v to 16v
Current draw in sleep: < 0.05mA - over 2.5 years on a 2500mAh battery
On-board FET can be used to drive high-current outputs
Rev 1v4: 500mA polyfuse on board
Rev 1v4: CE and RoHS certification

BUYING

You can now get an Espruino Pico from several different distributors. Click here to see them.

PINOUT

Hover the mouse over a pin function for more information. Clicking in a function will tell you how to use it in Espruino.

Purple boxes show pins that are used for other functionality on the board. You should avoid using these unless you know that the marked device is not used.
! boxes contain extra information about the pin. Hover your mouse over them to see it.
3.3v boxes mark pins that are not 5v tolerant (they only take inputs from 0 - 3.3v, not 0 - 5v).
3.3 is a 3.3v output from the on-board Voltage regulator.
GND is ground (0v).
VBAT is the battery voltage output (see the Espruino Board Reference).
ADC is an Analog to Digital Converter (for reading analog voltages)
PWM is for Pulse Width Modulation. This creates analog voltages from a digital output by sending a series of pulses.
SPI is the 3 wire Serial Peripheral Interface.
USART is a 2 wire peripheral for Serial Data.
I2C is the 2 wire Inter-Integrated Circuit bus.

A4 ADC USART2 CK

A3 ADC PWM USART2 RX

A2 ADC PWM USART2 TX

A1 ADC PWM

A0 ADC PWM

A10 PWM USART1 RX

B9 I2C1 SDA PWM

B8 I2C1 SCL PWM

GND

VBAT

3.3

B3 I2C2 SDA PWM SPI3 SCK SPI1 SCK

B4 I2C3 SDA PWM SPI1 MISO SPI3 MISO

B5 PWM SPI1 MOSI SPI3 MOSI

B6 ! I2C1 SCL PWM USART1 TX

B7 ! I2C1 SDA PWM USART1 RX

A8 I2C3 SCL PWM USART1 CK

BAT_IN

B15 PWM SPI2 MOSI

B14 PWM SPI2 MISO

B13 PWM SPI2 SCK

B10 I2C2 SCL PWM SPI2 SCK

B1 ADC PWM

A7 ADC PWM SPI1 MOSI

A6 ADC PWM SPI1 MISO

A5 ADC PWM SPI1 SCK

VBAT

3.3

GND

PINS NOT ON CONNECTORS

A9 ! USB PWM USART1 TX

A11 USB PWM USART6 TX

A12 USB USART6 RX

A13 ! JTAG

A14 ! JTAG

A15 ! JTAG PWM

B0 ! ADC USB PWM

B2 LED1 BOOT1

B12 LED2

C13 BTN1

C14 ! OSC RTC

C15 ! OSC RTC

H0 OSC

H1 OSC

Note: There is no built-in fuse on the Espruino Pico 1v3 (1v4 contains one). You should check that your circuit does not contain shorts with a volt meter before you plug it into USB, or you may damage your board.

INFORMATION

資料來源：http://www.espruino.com/Pico

TUTORIALS

Tutorials using the Pico Board:

LAYOUT

Espruino Pico diagram

Name	Function
USB	Printed Type A USB connector plugs straight into standard socket
LEDs	Red and Green LEDs accessible using the built-in variables LED1 and LED2
Button	Button accessible using the built-in variable BTN
SWD Debug	(Advanced) SWD debug connections for firmware debugging
BOOT0 Jumper	(Advanced) Short this jumper out to connect the button to BOOT0. Plugging the device in with the button pressed will the cause the DFU bootloader to be started, allowing you to change absolutely all of Espruino's firmware.
JST Battery	Pads for a surface mount JST PHR-2 Battery connector (see below)
Micro/Mini USB	Under the white silkscreen are pads to solder USB sockets on (see below)
FET Jumper	Shorting this jumper allows the PFET to be controlled from pin B0 (see below)

Note: The two jumpers can be shorted out just by scribbling over them with an HB pencil.

EMBEDDING THE PICO

Surface mount Pico

The Pico is designed to be easy to include in your designs. The 0.1" pins are easy to fit in to sockets, and castellated edges mean that unpinned Picos can easily be surface-mounted directly to a PCB.

To make it even easier, we've provided a part library for Eagle CAD that includes the Pico's footprint in several different configurations:

Eagle CAD Footrpints

Library Name	Description
PICO_PIN	Through-hole connections for all of the Pico's pins
PICO_SMD	Through-hole connections that can also be used to surface-mount a Pico
PICO_HALFSMD	0.1" Through-hole connections, with surface-mount pads for 0.05" pins. This often helps with routing small boards (wires can be run under the 0.05" pads)
PICO_SMDONLY	Surface mount-only pads for a Pico. Good for double-sided boards with large SMD components on the other side
PICO_0.05	Through-hole pads for just 0.05" pins (including power) - useful for very small add-on boards

These parts are also used for a variety of Shims that allow the Pico to be easily attached to other hardware.

HARDWARE LIMITATIONS

You can only have one watched pin of each number (Watching A0 and A1 is fine, but watching A1 and B1 isn't)
When in Deep sleep, pin B9 cannot be used as a watch (as A9 is used to wake up on USB)
The internal low speed oscillator is used for timekeeping unless an external crystal is soldered on. This is not accurate and can be +/- 10%

TROUBLESHOOTING

Please see the Troubleshooting section.

BATTERY

JST connector positioning

Espruino Pico contains the circuitry needed to power itself from a battery without the voltage drop of a diode. This means that it will run off of normal 3.7v LiPo batteries (or any voltage up to 16v).

In order to connect to a battery, you can use either the pins marked Bat and GND (on opposite sides of the board, nearest the USB connector), or you can solder a JST S2B-PH-SM4-TB Battery connector connector onto the underside of the board.

Please see the Battery page for information on connectors and where to buy them.

ALTERNATE USB CONNECTORS

Micro and Mini USB

On the rear of the Pico Board under the while block of silkscreen, there are pads for connectors. Espruino rev 1v3 has both Micro and Mini USB, but Espruino rev 1v4 only has Mini USB (due to potential issues with Apple's USB extension leads).

To use these, carefully scratch off the silkscreen until you have copper tracks, and solder on the connector.

The connectors you need are very standard parts. While some parts are listed below, many other parts from many different manufacturers would work perfectly well.

Mini-B USB

(Pico Revision 1v3 and 1v4) - 5 pin, 4 pad surface mount

Micro-B USB

(Pico Revision 1v3 only) - 5 pin, 2 pad surface mount

POWER, AND THE FET/B0 JUMPER

Pico Board	Quick Reference	Circuit Diagram (below)	Description
USB Plug		VUSB	USB voltage in
VCC	5V	5V	USB voltage output (minus diode drop) if connected, Battery voltage if not
Bat (also pad marked `<span class="pun">+</span>`)	BAT_IN	VBAT	Battery voltage input (connect battery here)
3.3V	VDD	VDD	Regulated 3.3v output (~200mA continuous)

Currently the labelling for the Pico's pins is quite confusing (it's different on the circuit diagram, PCB silkscreen, and the Pinout diagram). Hopefully the table above will help to clear it up slightly.

Power circuitry

Espruino's power circuitry is as above. When USB is connected the device is powered through a Schottky diode with 0.3v voltage drop. However when USB is disconnected then Espruino can be powered from a battery with no voltage drop. This is done by turning on the PFET Q1.

However, the FET/B0 Jumper allows you to connect the PFET's gate to pin B0. This allows you to do several things:

Check whether the device is running from USB or Battery (digitalRead(B0)?"USB":"Bat")
When running from USB, use the Bat Pin as a powered 5V output.
When running from USB with a battery connected, charge the battery.

This last reason is why the jumper is disconnected by default. It could be dangerous to charge a LiPo battery this way unless your software also monitor's the battery's charge.

Once the FET/B0 Jumper is shorted, the following commands will work:

<code><span class="pln">digitalWrite</span><span class="pun">(</span><span class="pln">B0</span><span class="pun">,</span><span class="lit">0</span><span class="pun">);</span> <span class="com">// Turn on the 'Bat' output fully</span> digitalWrite<span class="pun">(</span><span class="pln">B0</span><span class="pun">,</span><span class="lit">1</span><span class="pun">);</span> <span class="com">// Partially turn on the 'Bat' output (this produces 3.3v on the FET, meaning it has just 1.4v between Gate and Drain)</span> digitalRead<span class="pun">(</span><span class="pln">B0</span><span class="pun">);</span> <span class="com">// turn off the output (also check if USB powered)</span> pinMode<span class="pun">(</span><span class="pln">B0</span><span class="pun">,</span> <span class="str">"af_opendrain"</span><span class="pun">);</span><span class="pln">analogWrite</span><span class="pun">(</span><span class="pln">B0</span><span class="pun">,</span> <span class="lit">0.5</span><span class="pun">,</span> <span class="pun">{</span><span class="pln">freq</span><span class="pun">:</span><span class="lit">100</span><span class="pun">});</span> <span class="com">// output a 100Hz 50% duty cycle square wave</span><a href="http://www.espruino.com/webide?code=digitalWrite(B0%2C0)%3B%20%2F%2F%20Turn%20on%20the%20'Bat'%20output%20fully%0AdigitalWrite(B0%2C1)%3B%20%2F%2F%20Partially%20turn%20on%20the%20'Bat'%20output%20(this%20produces%203.3v%20on%20the%20FET%2C%20meaning%20it%20has%20just%201.4v%20between%20Gate%20and%20Drain)%0AdigitalRead(B0)%3B%20%2F%2F%20turn%20off%20the%20output%20(also%20check%20if%20USB%20powered)%0ApinMode(B0%2C%20%22af_opendrain%22)%3BanalogWrite(B0%2C%200.5%2C%20%7Bfreq%3A100%7D)%3B%20%2F%2F%20output%20a%20100Hz%2050%25%20duty%20cycle%20square%20wave%0A" class="codelink" title="Send to Web IDE"></a></code>

The jumper can be shorted by scribbling over it with a normal HB pencil. See the Pico FET Output tutorial for an example.

ADVANCED REFLASHING

In very rare cases (if you are experimenting with writing to Flash Memory), you may be able to damage the bootloader, which will effecitively 'brick' the Pico.

To fix this, you'll have to use the hard-wired USB DFU (Device Firmware Upgrade) bootloader. You can also use this method for flashing non-Espruino firmwares to Espruino.

Just:

Short out the BOOT0/BTN solder jumper on the back of the board - you can do this by drawing over it with a pencil.
Install ST's DFU utility on Windows, or dfu-util for Mac or Linux
Download the latest Espruino Pico binary from espruino.com/binaries
Hold down the Pico's button while plugging it into USB
Use the DFU tool to flash the firmware. Using the GUI on windows, or with the command sudo dfu-util -a 0 -s 0x08000000 -D espruino_binary_file.bin for dfu-util on Mac/Linux.
Un-short the BOOT0/BTN jumper to re-use the original Espruino Bootloader. If you used a Pencil mark then you may need to use cleaning fluid and a small brush to totally clear out the graphite.

Note: If you can't access the bottom side of the board (maybe it is soldered down), on rev 1v3 boards BOOT0 is available via a gold teardrop-shaped pad on the top of the board. Short this to 3.3v while applying power to enable DFU mode (holding down the button is then not required).

ADVANCED DEBUGGING

The Pico also has SWD Debug connections on the back of it. An ST-Link debugger (or ST Discovery/Nucleo board) can be connected to these connections for fast firmware uploads and source-level debugging of the interpreter itself.

See the AdvancedDebug page for more information.

This page is auto-generated from GitHub. If you see any mistakes or have suggestions, please let us know.

資料來源：https://www.seeedstudio.com/Espruino-Pico-%28pinned%29-p-2547.html

Description

Espruino Pico is a tiny microcontroller board that runs JavaScript (it doesn’t need to be plugged into a computer), making it easier than ever to control electronics in the real world. You can program it with nothing but a serial terminal program, but there’s also an IDE that runs in the Chrome Web browser. It’s got a syntax highlighted editor as well as a graphical programming language.

Once you have uploaded code, you can inspect and change variables (including functions) while your program is running. If you make something with an Espruino Pico and need to change it a year later, your original code is still there waiting for you!

This is the pinned version of the board, which fits perfectly into breadboard. If you need without pre-soldered pins, please visit Espruino Pico (unpinned).