coXXect

The purpose of this exercise is to test the behavior of MicroPython _thread, specifically for Raspberry Pi Pico series, whether _thread.start_new_thread() can provide real multi-core parallel speedup for pure Python CPU-bound work.  mpy_thread_smp_bench.py # mpy_thread_smp_bench.py # # Purpose: # Simple MicroPython benchmark to test whether _thread.start_new_thread() # can provide real multi-core parallel speedup for pure Python CPU-bound work. # # Method: # 1. Run a CPU-bound loop in the main thread and measure the duration. # This is the single-thread baseline. # # 2. Run the same CPU-bound loop in two threads: # - one in the main thread # - one in a newly created _thread # # 3. Measure: # - duration of thread 0 # - duration of thread 1 # - total wall-clock time from starting both threads until both finish # # Interpretation: # Let single-thread duration be T. # # If the two CPU jobs run fully in parallel on two cores: # tot...

Raspberry Pi Pico 2 W with CircuitPython 10.0.3, to display BMP images from an MicroSD card on a 240*240 GC9A01 Round LCD , using displayio.OnDiskBitmap() and adafruit_imageload.load(). Reference: -  displayio.OnDiskBitmap() -  adafruit_imageload.load() All bmp were resized and converted from jpg to 240*240 RGB888 bmp using FFmpeg . Connection: Raspberry Pi Pico 2 W ===================== GP28| GND | GP27| GP26| Run | GP22| ------- LCD_BLK ------------+ GND | | GP21| ------- LCD_DC ---------+ | GP20| ------- LCD_RES-------+ | | +------- SD_MISO|GP12 GP19| MOSI - SPI_SDA ----+ | | | | +----- SD_CS |GP13 GP18| SCK - SPI_SCL --+ | | | | | | |GND GND | | | | |...

CircuitPython exercise to list files in SD Connection: Raspberry Pi Pico 2 W ===================== GP28| GND | GP27| GP26| Run | GP22| GND | GP21| GP20| +------- SD_MISO|GP12 GP19| | +----- SD_CS |GP13 GP18| | | |GND GND | | | +--- SD_SCK |GP14 GP17| | | | +- SD_MOSI|GP15 GP16| | | | | +---------------+ | | | | | | | | SD Module | | | | ========= | | | | GND --- GND +-|-|-|-------- MISO | +-|-------- CLK | +-------- MOSI +------------ CS 3V3 --- 3V3 Exercise Code: cpy_rpPicoW_sd.py """ Raspberry Pi Pico 2 W/CircuitPython 10.0.3 with SD Card module. List files in SD. """ import os, sys import board...

In my previous post , I demonstrated basic exercises running on the Raspberry Pi Pico 2 W with CircuitPython 10.0.3, displaying graphics on a 1.28‑inch IPS module (GC9A01 + CST816S, 240×240 round, 4‑wire SPI) . In this post, I present exercises using CircuitPython 10.0.3 on the Raspberry Pi Pico 2 W to download a bitmap via WiFi, save it to the local file system, and display it on the GC9A01 LCD using OnDiskBitmap. The BMP in my test was resized and converted from JPG to BMP(240*240 RGB888) using FFmpeg . cpy_rpPicoW_gc9a01_OnDiskBitmap_wifi.py """ Raspberry Pi Pico 2 W/CircuitPython 10.0.3 with 1.28" 240x240 Round GC9A01 SPI IPS LCD Download bmp to local file system and display it using OnDiskBitmap ~ Single bmp. In this exercise, Pico 2 W download image from web server, save it on CircuitPython local filesystem, named "image.bmp, then display it on 1.28" 240x240 Round GC9A01 SPI IPS LCD using OnDiskBitmap. https://coxxect.blogspot.com/2026/01/...

Raspberry Pi Pico 2 W display on dual LCD using Arduino_GFX_Library.  - 2.4 inch 240×320 ST7789 SPI IPS - 2.0 inch 240x320 ST7789 SPI IPS Connection: Connection ==========      Raspberry Pi Pico 2 W | GP28| ------- LCD2_RST -----------------+      GND | |      GP27| ------- LCD2_DC ----------------+ |      GP26| ------- LCD2_CS --------------+ | |      Run | | | |      GP22| ------- LCD_RST ------+ | | |      GND | | | | |      GP21| ------- LCD_DC -------|-+ | | |      GP20| ------- LCD_BL -------|-|---+ | | |      GP19| MOSI - SPI_SDA ----+ | | | | | |      GP18| SCK - SPI_SCL --+ | | | | | | |      GND |      | | | | | | | |      GP17| SS - LCD_CS ---|-|-|-|-+ | | | ...

LVGL (Light and Versatile Graphics Library) is a popular free and open-source embedded graphics library to create beautiful UIs for any MCU, MPU and display type, supports working with the TFT_eSPI library. Following previous exercise " Raspberry Pi Pico 2 drive 4.0" 320x480 TFT SPI ST7796 with FT6336U Capacitive Touch + SD, in Arduino framework ", this exercise show steps to add LVGL on top of TFT_eSPI, on Raspberry Pi Pico 2. Install lvgl library in Arduino IDE's Library Manager. Using LVGL with Arduino requires some extra steps: Be sure to read the docs here: https://docs.lvgl.io/master/integration/framework/arduino.html Follow these configuration steps: - Go to the directory of the installed Arduino libraries - Go to lvgl and copy lv_conf_template.h as lv_conf.h into the Arduino Libraries directory next to the lvgl library folder. - Open lv_conf.h and change:   To enable the content of the file:   change the first #if 0 to #if 1   To use T...

Exercise of Raspberry Pi Pico 2 (in Arduino framework) to drive  4.0" 320x480 TFT SPI ST7796 with FT6336U Capacitive Touch + SD . The Raspberry Pi Pico 2 are programmed in Arduino framework using board of  Raspberry Pi Pico/RP2040/RP2350 by Earle F. Philhower, III (arduino-pico) , load bmp images from SD card, display on ST7796 using  TFT_eSPI , and touch screen to switching among images. Connection: ST7796 Module Raspberry Pi Pico 2 --------------------------------------- SD_CS GP15 CTP_INT not used CTP_SDA GP4 CTP_RST GP14 (optional, or 3V3) CTP_SCL GP5 SDO(MISO) GP16 LED GP22 SCK GP18 SDI(MOSI) GP19 LCD_RS GP21 LCD_RST GP20 LCD_CS GP17 GND GND VCC VBUS (5V) This ST7796 display module have on board level conversion circuit, compatible with 5V and 3.3V MCU. According LCDWiKi 4.0inch Capacitive SPI Module ST7796 , VCC is recommended to connect to 5V. When connected to 3.3V, the backlight brightness will be s...