# 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")