MatthiasQuintern/AT28C256-rpi-util
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

add page write

Browse Source
This commit is contained in:
matthias@rpi 2023-10-28 03:47:23 +02:00
parent 1eb3435181
commit b48947d9b1
1 changed files with 148 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

200
eeprom.py
View File

@ -19,13 +19,11 @@ gpio_r = [14, 15, 18, 23, 24, 25, 8, 7, 12, 16, 20, 21]
A = [
# 27, 22, 10, 9, 11, 5, 6, 13,
13, 6, 5, 11, 9, 10, 22, 27, # A0 - A7
2, 3, 17, 4, # A8 - A11
23, 18, 15 # A12 - A14
3, 4, 18, 17, # A8 - A11
23, 2, 15 # A12 - A14
]
# IO = gpio_r[4:12] # 8 io pins
# IO.reverse()
IO = [ 24, 25, 8, 7, 12, 16, 20, 21 ]
IO = [ 16, 20, 21, 12, 7, 8, 25, 24]
OEb = 26 # Output Enable
WEb = 19 # Write Enable
@ -35,17 +33,36 @@ controls = [CEb, WEb, OEb]
# TIMES
# Read:
t_ACC = 150 * 1e-9 # Address to Output Delay
t_read_ACC = 150 * 1e-9 # Address to Output Delay
t_read_CE = 70 * 1e-9 # CE to output delay
t_read_OE = 150 * 1e-9 # OE to output delay
t_read_DF = 50 * 1e-9 # data float
# Write:
t_AS = 0 # Address Setup time
t_AH = 50 * 1e-9 # Address Hold Time
t_CS = 0 # Chip Select Hold Time
t_WP = 100 * 1e-9 # Write Pulse Width
t_DS = 50 * 1e-9 # Data Setup Time_CS = 0
t_DH = 0 # Data Hold Time
t_WPH = 50 * 1e-9 # Write Puls High
t_WPH = 50 * 1e-4 # Write Pulse High !!!2*e5 longer than in Datasheet, since shorter high caused Problems with my Chip!!!
t_write_AS = 0 # Address Setup time
t_write_OES = 0 # OEb Setup time
t_write_AH = 50 * 1e-9 # Address Hold Time
t_write_CS = 0 # Chip Select Setup Time
t_write_CH = 0 # Chip Select Hold Time
t_write_WP = 100 * 1e-9 # Write Pulse Width
t_write_DS = 50 * 1e-9 # Data Setup Time
t_write_DH = 10 * 1e-9 # Data Hold Time
t_write_OEH = 0 # OEb Hold Time
t_write_WPH = 50 * 1e-9 # Write Puls High
t_write_WC = 10 * 1e-3 # Write Cycle Time
# t_write_WP = 100 * 1e-6 # Write Pulse Width
# t_write_WPH = 50 * 1e-6 # Write Pulse High !!!2*e5 longer than in Datasheet, since shorter high caused Problems with my Chip!!!
# t_read_ACC = 150 * 1e-6 # Address to Output Delay
# t_write_DH = 1 * 1e-5 # Data Hold Time
# Toggle
t_toggle_OE = 0 # OE to output delay
t_toggle_OEH = 10 * 1e-9 # OE hold time
t_toggle_OEHP = 150 * 1e-9 # OE high pulse
# t_toggle_OEH = 500 * 1e-7 # OE hold time
# t_toggle_OEHP = 500 * 1e-7 # OE high pulse
PRINT_HEX = True
PRINT_BIN = False
@ -53,7 +70,6 @@ PRINT_DEC = False
REP_CHAR = '\n'
#
# UTILITY
#
@ -117,13 +133,14 @@ def get_bit(value: int, n: int):
return value & (1 << n)
def read_binary_file(filepath, from_ad=0) -> list[int]:
def read_binary_file(filepath, from_ad=0, to_ad=-1) -> list[int]:
with open(filepath, "rb") as file:
bindata = []
for byte in file.read():
bindata.append(byte)
return bindata[from_ad:]
if to_ad < 0:
to_ad = len(bindata) - 1
return bindata[from_ad:to_ad+1]
#
@ -164,56 +181,97 @@ def write_byte(byte: int, address: int, verbose=True, debug=False):
GPIO.output(OEb, 1)
# setup the address
set_address(address, bits=15)
setup_io_pins(OUT)
# Setup Data
for j in range(8):
GPIO.output(IO[j], get_bit(byte, j))
# wait "Address" Setup Time
sleep(t_AS)
# wait "Data Setup Time"
sleep(t_DS)
GPIO.output(CEb, 0)
# wait setup time
sleep(max(t_write_CS, t_write_AS, t_write_OES))
# Start the write pulse -> enable WEb
GPIO.output(WEb, 0)
# wait until minimum write pulse width is reached. in theory, should be t_WP-t_DS but this caused problems
sleep(t_WP)
# Setup Data
setup_io_pins(OUT)
for j in range(8):
GPIO.output(IO[j], get_bit(byte, j))
sleep(t_write_DS)
# wait until minimum write pulse width
sleep(t_write_WP)
if debug:
clear_line()
echo(address, byte, mode="w", message="DEBUG: Press enter to continue")
input()
# End Write Pulse -> disable WEb
GPIO.output(WEb, 1)
GPIO.output(CEb, 1)
# wait "Data Hold"
sleep(t_DH)
sleep(max(t_write_DH, t_write_WPH))
GPIO.output(CEb, 0)
GPIO.cleanup(IO)
setup_io_pins(IN)
wait_write_finished()
GPIO.output(CEb, 1)
def write_page(address: int, page: list[int], verbose=True) -> int:
GPIO.output(OEb, 1)
# setup the address
set_address(address, bits=15)
GPIO.output(CEb, 0)
echo(address, 0, mode="p")
assert 64 - (address % 64) >= len(page), f"64 - (address % 64) ={64 - (address % 64)}!>={len(page)}=len(page)"
# wait setup time
sleep(max(t_write_CS, t_write_AS, t_write_OES))
# Setup Data
setup_io_pins(OUT)
for i in range(len(page)):
set_address(address + i, bits=6)
# Start the write pulse -> enable WEb
GPIO.output(WEb, 0)
for j in range(8):
GPIO.output(IO[j], get_bit(page[i], j))
sleep(max(t_write_DS, t_write_WP))
GPIO.output(WEb, 1)
sleep(t_write_WPH)
GPIO.cleanup(IO)
setup_io_pins(IN)
# wait_write_finished()
sleep(t_write_WC)
# print(f"Toggled {timeout} times")
GPIO.output(CEb, 1)
def wait_write_finished():
# check the toggle bit IO6, if it stops toggling the write is done
sleep(t_toggle_OEH)
timeout = 0
while timeout < 1e3:
GPIO.output(OEb, 0)
sleep(1e-9)
sleep(t_toggle_OE)
bit1 = GPIO.input(IO[6])
sleep(t_toggle_OEH)
GPIO.output(OEb, 1)
sleep(1e-9)
sleep(t_toggle_OEHP)
GPIO.output(OEb, 0)
sleep(1e-9)
sleep(t_toggle_OE)
bit2 = GPIO.input(IO[6])
sleep(t_toggle_OEH)
GPIO.output(OEb, 1)
sleep(1e-9)
sleep(t_toggle_OEHP)
if bit1 == bit2:
timeout = 1e3
break
timeout += 1
GPIO.output(CEb, 1)
def read_byte(address: int, verbose=True, debug=False) -> int:
@ -227,8 +285,7 @@ def read_byte(address: int, verbose=True, debug=False) -> int:
GPIO.output(OEb, 0)
# wait the "Address to Output Delay" until the output is valid
sleep(t_ACC)
sleep(max(t_read_ACC, t_read_CE, t_read_OE))
byte = 0
for j in range(8):
@ -243,6 +300,8 @@ def read_byte(address: int, verbose=True, debug=False) -> int:
GPIO.output(OEb, 1)
GPIO.output(CEb, 1)
sleep(t_read_DF)
if verbose: echo(address, byte, mode="r")
return byte
@ -262,12 +321,15 @@ def read(from_ad=0, to_ad=255, delay=1e-3, ignore=[0xff], debug=False, compare:l
content = []
unequal = []
if compare:
assert len(compare) == to_ad - from_ad + 1, f"{len(compare)} vs = {to_ad - from_ad + 1} {to_ad} - {from_ad} + 1"
for i in range(from_ad, to_ad + 1):
byte = read_byte(i, verbose=verbose, debug=debug)
content.append(byte)
if compare:
if not compare[i-from_ad] == byte:
if not compare[i-from_ad] == content[i-from_ad]:
unequal.append(i)
echo(i, byte, "vs {" + format_number(compare[i-from_ad], hex_digits=2, bin_digits=8, dec_digits=3) + "} in file", mode="c", end="\n")
@ -279,7 +341,7 @@ def read(from_ad=0, to_ad=255, delay=1e-3, ignore=[0xff], debug=False, compare:l
return content
def write(content: list[int], from_ad=0, delay=0, debug=False, only_diff=True, verbose=True, check_written=True):
def write(content: list[int], from_ad=0, delay=0, debug=False, only_diff=True, verbose=True, check_written=True, use_page_write=False):
"""
Write a list if bytes to the eeprom.
WEb controlled
@ -293,17 +355,39 @@ def write(content: list[int], from_ad=0, delay=0, debug=False, only_diff=True, v
failed = []
print(f"Writing to EEPROM: {len(content)} bytes from address {format(from_ad, '04x')} to {format(to_ad, '04x')}.")
for i in range(len(content)):
if not only_diff or (only_diff and content[i] != current_content[i]):
write_byte(content[i], from_ad + i, verbose=True, debug=debug)
n_written = 0
n_written_pages = 0
if use_page_write:
# assert from_ad == 0, "from_ad != 0 not supported yet"
# assert (to_ad+1) % 64 == 0, f"to_ad-1 % 64 != 0 not supported yet. to_ad={to_ad}, to_ad+1% 64 = {(to_ad+1) % 64}"
for i in range(from_ad, to_ad, 64):
# print(i, i+64, i+64 - (i%64))
page_end = i + 64 - (i % 64)
page = content[i:page_end]
# print(page, current_content[i:page_end])
if only_diff and page == current_content[i:page_end]:
continue
write_page(i, page)
n_written_pages += 1
n_written += len(page)
sleep(delay)
else:
for i in range(from_ad, to_ad + 1):
if only_diff and (only_diff and content[i-from_ad] != current_content[i-from_ad]):
continue
write_byte(content[i-from_ad], i, verbose=True, debug=debug)
n_written += 1
# wait artifical delay
sleep(delay)
clear_line()
print("Write to EEPROM - Done!")
print(f"Written " + (f"{n_written_pages} pages / " if use_page_write else "") + f"{n_written} bytes")
if check_written:
print("Comparing EEPROM to file...")
failed = read(from_ad=from_ad, to_ad=to_ad, delay=delay, debug=debug, verbose=False, compare=content)
retries = 1
failed = read(from_ad=from_ad, to_ad=to_ad, delay=delay, debug=debug, verbose=True, compare=content)
retries = 2
while len(failed) > 0 and retries > 0:
print(f"Found {len(failed)} bytes deviating from the file - retrying: {retries} times")
for ad in failed:
@ -340,6 +424,8 @@ def main():
epilog="Numbers can be passed as int, hex prefixed with '0x' and binary prefixed with '0b'",
)
parser.add_argument("--write", "-w", dest="write", action="store_true", default=False, help="write binary file onto the EEPROM")
parser.add_argument("--page", "-p", dest="use_page_write", action="store_true", default=False, help="use page write mode")
parser.add_argument("--no-validate", dest="validate_write", action="store_false", default=True, help="dont validate write operations")
parser.add_argument("--compare", "-c", dest="compare", action="store_true", default=False, help="compare EEPROM content to binary file")
parser.add_argument("--read", "-r", dest="read", action="store_true", default=False, help="read the contents of the EEPROM")
parser.add_argument("--erase", "-e", dest="erase", action="store_true", default=False, help="erase the contents of the EEPROM")
@ -363,17 +449,25 @@ def main():
if args.no_hex: PRINT_HEX = False
if args.bin: PRINT_BIN = True
if args.file:
file = read_binary_file(args.file, from_ad=args.from_ad, to_ad=args.to_ad)
if args.to_ad != args.from_ad + len(file) - 1:
args.to_ad = args.from_ad + len(file) - 1
else:
file = None
if args.print_pins:
print_pins()
exit(0)
if args.erase:
erase(from_ad=args.from_ad, to_ad=args.to_ad, delay=args.delay, debug=args.debug, verbose=args.verbose)
erase(from_ad=args.from_ad, to_ad=args.to_ad, delay=args.delay, debug=args.debug, verbose=True)
if args.write:
write(read_binary_file(args.file, from_ad=args.from_ad), from_ad=args.from_ad, delay=args.delay, debug=args.debug, verbose=args.verbose)
write(file, from_ad=args.from_ad, delay=args.delay, debug=args.debug, verbose=True, check_written=args.validate_write, use_page_write=args.use_page_write)
if args.read:
read(from_ad=args.from_ad, to_ad=args.to_ad, delay=args.delay, debug=args.debug, verbose=args.verbose, ignore=args.ignore)
read(from_ad=args.from_ad, to_ad=args.to_ad, delay=args.delay, debug=args.debug, verbose=True, ignore=args.ignore)
if args.compare:
unequal = read(from_ad=args.from_ad, to_ad=args.to_ad, delay=args.delay, debug=args.debug, verbose=args.verbose, ignore=args.ignore, compare=read_binary_file(args.file))
unequal = read(from_ad=args.from_ad, to_ad=args.to_ad, delay=args.delay, debug=args.debug, verbose=args.verbose, ignore=args.ignore, compare=file)
print(f"Found {len(unequal)} deviating values")