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import time
import adafruit_sdcard
import board
import busio
import digitalio
import microcontroller
import storage
# Use any pin that is not taken by SPI
SD_CS = board.D0
led = digitalio.DigitalInOut(board.D13)
led.direction = digitalio.Direction.OUTPUT
# Connect to the card and mount the filesystem.
spi = busio.SPI(board.SCK, board.MOSI, board.MISO)
cs = digitalio.DigitalInOut(SD_CS)
sdcard = adafruit_sdcard.SDCard(spi, cs)
vfs = storage.VfsFat(sdcard)
storage.mount(vfs, "/sd")
# Use the filesystem as normal! Our files are under /sd
print("Logging temperature to filesystem")
# append to the file!
while True:
# open file for append
with open("/sd/temperature.txt", "a") as f:
led.value = True # turn on LED to indicate we're writing to the file
t = microcontroller.cpu.temperature
print("Temperature = %0.1f" % t)
f.write("%0.1f\n" % t)
led.value = False # turn off LED to indicate we're done
# file is saved
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