It's my first try CircuitPython 7.0.0 on STM32F411 minimum development board
(Blackpill-like but NOT Blackpill).
cpyF411_info.py
"""
CircuitPython exercise run on STM32F411CE,
get system info.
"""
import os
import microcontroller
import sys
print("- sys.implementation -")
for i in sys.implementation:
print(i)
print()
print("- os.uname() -")
for u in os.uname():
print(u)
print()
print("microcontroller.cpu.frequency:\t\t" + str(microcontroller.cpu.frequency))
print("microcontroller.cpu.temperature:\t" + str(microcontroller.cpu.temperature))
print("microcontroller.cpu.voltage:\t\t" + str(microcontroller.cpu.voltage))
cpyF411_listdir.pya
"""
CircuitPython List Files:
The original example list files in SDCard,
now modified to list files in current working directory.
ref:
https://learn.adafruit.com/micropython-hardware-sd-cards/tdicola-circuitpython
scroll down to "List Files"
"""
import os
def print_directory(path, tabs=0):
for file in os.listdir(path):
stats = os.stat(path + "/" + file)
filesize = stats[6]
isdir = stats[0] & 0x4000
if filesize < 1000:
sizestr = str(filesize) + " by"
elif filesize < 1000000:
sizestr = "%0.1f KB" % (filesize / 1000)
else:
sizestr = "%0.1f MB" % (filesize / 1000000)
prettyprintname = ""
for _ in range(tabs):
prettyprintname += " "
prettyprintname += file
if isdir:
prettyprintname += "/"
print('{0:<40} Size: {1:>10}'.format(prettyprintname, sizestr))
# recursively print directory contents
if isdir:
print_directory(path + "/" + file, tabs + 1)
currentDirectory = os.getcwd()
print("Files on filesystem: ", currentDirectory)
print("====================")
print_directory(currentDirectory)
cpyF411_readfile.py
"""
CircuitPython exercise run on STM32F411CE,
get system info.
"""
import os
textfile = "/boot_out.txt"
print("text file:", textfile)
print("========================")
with open(textfile, "r") as f:
print("Read line from file:")
print(f.readline())
cpyF411_hello.py
"""
CircuitPython exercise run on STM32F411CE,
toggle onboard LED.
"""
import board
import digitalio
import time
print("\ndir(board):")
print(dir(board))
led = digitalio.DigitalInOut(board.LED)
led.direction = digitalio.Direction.OUTPUT
while True:
led.value = True #LED Off
time.sleep(0.3)
led.value = False #LED On
time.sleep(0.3)
led.value = True #LED Off
time.sleep(0.3)
led.value = False #LED On
time.sleep(0.3)
led.value = True #LED Off
time.sleep(0.3)
led.value = False #LED On
time.sleep(1.5)
This video show how to flash nanoESP32-S2 with latest stable CircuitPython
7.0.0 firmware, install libraries, and run exercise to display on 2.0" IPS
240x320 RGB LCD with SPI ST7789 driver. It's my first time to run stable
CircuitPython 7.
Download and install CircuitPython firmware on nanoESP32-S2
Unzip the downloaded file, copy adafruit_st7789.mpy,
adafruit_display_text and adafruit_display_shapes folder to the lib
folder on your CIRCUITPY drive.
