circuitpython/drivers/sdcard/sdtest.py

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# Test for sdcard block protocol
# Peter hinch 30th Jan 2016
import os, sdcard, machine
def sdtest():
spi = machine.SPI(1)
spi.init() # Ensure right baudrate
sd = sdcard.SDCard(spi, machine.Pin.board.X21) # Compatible with PCB
vfs = os.VfsFat(sd)
os.mount(vfs, '/fc')
print('Filesystem check')
print(os.listdir('/fc'))
line = 'abcdefghijklmnopqrstuvwxyz\n'
lines = line * 200 # 5400 chars
short = '1234567890\n'
fn = '/fc/rats.txt'
print()
print('Multiple block read/write')
with open(fn,'w') as f:
n = f.write(lines)
print(n, 'bytes written')
n = f.write(short)
print(n, 'bytes written')
n = f.write(lines)
print(n, 'bytes written')
with open(fn,'r') as f:
result1 = f.read()
print(len(result1), 'bytes read')
fn = '/fc/rats1.txt'
print()
print('Single block read/write')
with open(fn,'w') as f:
n = f.write(short) # one block
print(n, 'bytes written')
with open(fn,'r') as f:
result2 = f.read()
print(len(result2), 'bytes read')
os.umount('/fc')
print()
print('Verifying data read back')
success = True
if result1 == ''.join((lines, short, lines)):
print('Large file Pass')
else:
print('Large file Fail')
success = False
if result2 == short:
print('Small file Pass')
else:
print('Small file Fail')
success = False
print()
print('Tests', 'passed' if success else 'failed')