Raspberry Pi Category - Page 24 of 25 - CNX Software

April 10, 2021March 23, 2023 by Jean-Luc Aufranc (CNXSoft) - 15 Comments

Olimex RP2040-PICO-PC “computer” to feature RP2040-Py Raspberry Pi Pico compatible module

We previously wrote it was possible to create a Raspberry Pi RP2040 board with HDMI using DVI and programmable IOs to output video up to 640×480 at 60 Hz with the microcontroller’s Cortex-M0+ cores clocked at 252 MHz. At the time, we also noted Olimex was working on such a board with RP2040-PICO-PC designed to create a small Raspberry Pi RP2040 computer with HDMI/DVI video output. The Bulgarian company has now manufactured the first prototype, but due to supply issues with the Raspberry Pi Pico board, they also designed their own RP2040-PICO module since they’ve got a reel of Raspberry Pi RP2040 microcontrollers. RP2040-PICO-PC small computer board Specifications: Support for Raspberry Pi Pico board Storage – MicroSD card Video Output – HDMI port with DVI signal (note no audio through this interface) Audio output – 3.5mm audio jack Expansion UEXT connector with UART, SPI, I2C, 3.3V, and GND to attach […]

April 5, 2021April 6, 2021 by Jean-Luc Aufranc (CNXSoft) - No Comments

Raspberry Pi Pico Arduino Core released for RP2040 boards

Since Arduino plans to launch its own Raspberry Pi RP2040 based board with Arduino Nano RP2040 Connect, one would have expected software support for the Arduino IDE would have come from the company itself. But apparently, the developer community, or more exactly Earle F. Philhower, III did not feel like waiting. He had previously written ESP8266Audio library for audio file and I2S sound playing routines for ESP8266 & ESP32, and has recently released Raspberry Pi Pico Arduino Core on arduino-pico Github repository. The implementation appears to be already fairly comprehensive with support for digitalWrite/Read, shiftIn/Out, SPI master, analogWrite/PWM, Wire/I2C Master and Slave, analogRead and Pico chip temperature, filesystems like LittleFS and SD/SDFS, I2S audio output, and more. The Raspberry Pi RP2040 programmable IOs are also used to control servos, generate tones, and I2S output. You’ll need the Arduino IDE 1.8.x or the beta version of Arduino IDE 2.0, and add […]

March 15, 2021March 14, 2021 by Saumitra Jagdale - 2 Comments

Piper Make: First Drag-and-Drop Coding Platform for Raspberry Pi Pico

In 2019 we saw Piper’s Computer Kit 2, which was a DIY Raspberry Pi 3 Computer for educational purposes. The kit was for kids to educate them on building their own computers and the basics of programming in electronics. This year the company has come up with another educational platform. Meet Piper Make. The newly launched Raspberry Pi Pico is capable of a wide range of applications but directly working on the development board for exploring these applications could be difficult for beginners. Additionally, prototyping a project or an application before implementing it is an ideal way for starting. Hence. Piper has launched its first drag-and-drop coding platform for the Raspberry Pi Pico which allows hands-on prototyping for the users. Piper Make platform has an interface that supports Chromebooks and other computers, thus making it flexible for users. It is free for users to explore hands-on with the Raspberry Pi […]

March 12, 2021 by Saumitra Jagdale - 27 Comments

Machine Learning on Raspberry Pi Pico, RP2040, and future RPi MCUs

Although the Raspberry Pi Pico comes with the RP2040 chip that lacks the performance to implement machine learning inference for its applications. However, we saw a person detection use case through ArduCAM and TensorFlow lite interface. But, the processing performance of the use case was on the slower side. Additionally, a recent Eben Upton presentation also unveiled that due to low power requirements the board compensates the processing efficiency. Hence, it offers low-performance for edge inference and machine learning use cases. Eben Upton’s teaser on improvement in machine learning and the future scope of “Pi Silicon” revealed potential growth and development in edge inference applications. The demand for RP2040 boards has given rise to the market necessity for more boards. This demand can only be fulfilled if more boards with RP2040 chip are available in the market and company “partners such as Adafruit, Pimoroni, Adafruit and Sparkfun are start releasing […]

March 11, 2021March 12, 2021 by Jean-Luc Aufranc (CNXSoft) - 11 Comments

PiccoloSDR – A Raspberry Pi Pico powered SDR working with GNU Radio

There’s a lot you can do with the tiny Raspberry Pi Pico board, but computer student and radio amateur Luigi Cruz decided to go a step further by making Raspberry Pico RP2040 board work as an SDR compatible with GNU Radio open-source toolkit. The PicoSDR PiccoloSDR project relies on one of the ADC pins from the Raspberry Pi Pico board to sample 8-bit data at around 500 ksps and makes the data available through TCP/IP (emulated via the RNDIS protocol) over the Full Speed USB interface at up to 12 Mbps. As Luis notes applications are limited due to the low bandwidth, but it’s still a fun project. You can see demos with a web-based tone generator, a PWM generator, and actual audio where we see the spectrum chart, scope plot, and FFT plot updated in real-time. He has not released the demo code “officially” just yet, but I can […]

March 2, 2021March 2, 2021 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

Raspberry Pi RP2040 boards are coming with… HDMI?

We’ve already seen Raspberry Pi RP2040 MCU can support VGA output using the microcontroller’s programmable I/O blocks. But yesterday, I saw two upcoming RP2040 boards with an HDMI connector. How is that supposed to work? The first one is Olimex RP2040-PICO-PC that’s indeed like a pico PC board with an HDMI connector for video, a micro SD card for storage, a standard 3.5mm audio jack for speaker or headphone, and a USB host for a keyboard. RP2040-PICO-PC teaser small PC with RP2040-PICO module. Video, Audio, SD-card, UEXT, I2C, Lipo battery, Reset, USB pwr, USB host for keyboard, Debug TxRx, SWD for JTAG debug #rp2040 #raspberrypi #circuitpython #retrogames pic.twitter.com/str79xsMkm — OLIMEX Ltd (@Olimex) March 1, 2021 There are some I/O headers for good measure, what looks like a 3-pin UART console header, a 2-pin header for LiPo battery, as well as a reset button. The second board, dcelectr DC2040, follows the […]

March 1, 2021September 13, 2023 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

A neat way to add a reset button to Raspberry Pi Pico

The Raspberry Pi Pico is a nice little board, but if you program in C language, you’d need to disconnect the micro USB cable each time you’d like to flash the UF2 firmware. That’s not convenient and could damage your board over time. The Raspberry Pi Foundation even decided to write a blog post explaining how to add a reset button to your Raspberry Pi Pico using a breadboard circuit. Here’s what it looks like. That works but you may want to use that breadboard for another circuit, so the reset button takes space. Another solution is to program with a Raspberry Pi board and use SWD mode to upload code using the debug port, instead of using mass storage (BOOTSEL) mode. I’ve also found out that most baseboards for the Pico board will include a reset button. But this morning, I’ve come across another solution that looks pretty neat. […]

February 24, 2021February 24, 2021 by Jean-Luc Aufranc (CNXSoft) - No Comments

Kiwikit Raspberry Pi Pico baseboard takes off-the-shelf modules

While it’s possible to use Raspberry Pi Pico with a breadboard or Veroboard, we’ve seen the benefits of inserting the board into a baseboard such as Maker Pi Pico providing LEDs, a MicroSD card, audio output, and the ability to add ESP-01 WiFi module or well as up to two Grove expansion modules. Hammond Pearce decided to design his own Raspberry Pi Pico baseboard with Kiwikit board supporting some of the off-the-shelf modules and interfaces he commonly uses. Kiwikit key features and specifications Supported module – Raspberry Pi Pico Storage – 8-pin header for AT24C08 EEPROM up to 1KB Display – Connector for I2C SSD1306 OLED display On-board sensor – LDR (light-dependent resistor aka photoresistor) connected over analog input I/Os SPI header working for instance, with SD card modules as shown in the photo above. I2C header compatible with MP-6050 accelerometer/gyroscope modules Header with 2x ADCs with optional pull-ups that […]