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#!/usr/bin/env python3
import serial
import argparse
import os
from time import sleep
from math import ceil
#we send syn, recv ack
SYN_MAGIC = 0xdeadbeef
ACK_MAGIC = 0xf00dd00d
EEPROM_PAGESIZE = 64
EEPROM_FILE = "./compiled_eeprom"
parser = argparse.ArgumentParser(description="sends binary file over serial so the avr can write it to eeprom")
parser.add_argument('port', type=str)
parser.add_argument('baud', type=int)
args = parser.parse_args()
eeprom_file = open("./compiled_eeprom", "rb")
eeprom_filesize = os.fstat(eeprom_file.fileno()).st_size
page_len = ceil(eeprom_filesize / EEPROM_PAGESIZE)
s = serial.Serial(port=args.port, baudrate=args.baud, parity=serial.PARITY_NONE, timeout=0, dsrdtr=1)
#slow method
def write_hwf(data):
debugval = 0
print("writing")
data_parsed = [data[b:b+1] for b in range(len(data))]
for c in data_parsed:
print(debugval)
debugval += 1
s.rts = 1
while not s.cts:
pass
s.rts = 0
s.write(c)
def read_hwf(length):
print("reading")
msg = b''
for c in range(length):
s.rts = 1
while not s.cts:
pass
s.rts = 0
msg += s.read(size=1)
return(msg)
def handle_writer_error(write_status):
if write_status == 1: # verification failed
print("Verification failed on page {}!".format(page))
elif write_status == 0xff:
print("Unknown error writing page {}!".format(page))
#while True:
# write_hwf(b"abcdef\r\n")
# print(read_hwf(10))
write_hwf(page_len.to_bytes(1, 'little'))
for page in range(0, page_len):
print(page)
if EEPROM_PAGESIZE > (eeprom_filesize - eeprom_file.tell()):
write_hwf(eeprom_file.read())
[write_hwf(b'\x00') for b in range(0, eeprom_filesize % EEPROM_PAGESIZE)]
else:
write_hwf(eeprom_file.read(EEPROM_PAGESIZE))
write_status = read_hwf(1)
print("WRITE STATUS: {}".format(write_status))
if not write_status == 0:
handle_writer_error(write_status)
print("Done writing to EEPROM!\n")
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