Hi,
I have an issue about writing and reading data using flash area of nrf9160. I'm using the library of pynrfjprog and the following script for writing/reading data.
Script:
import argparse
from pynrfjprog import API
# Default settings
JLINK_SPEED_KHZ = 4000
DEFAULT_START_ADDR = "0x6F000"
DEFAULT_LENGTH = "0x4000"
DEFAULT_FILE_NAME = "jflashrw.bin"
def convert(str):
if str.upper().startswith("0X"):
return int(str, 16)
else:
return int(str)
if __name__ == '__main__':
# Print banner
print "JLink Flash read/write"
# Parse arguments
parser = argparse.ArgumentParser()
parser.add_argument("action", choices=("read", "write"), nargs="?", default="read")
parser.add_argument("--start", type=str, nargs="?", default=DEFAULT_START_ADDR)
parser.add_argument("--length", type=str, nargs="?", default=DEFAULT_LENGTH)
parser.add_argument("--file", type=str, nargs="?", default=DEFAULT_FILE_NAME)
args = parser.parse_args()
# Open connection to jlink
nrfjprog = API.API('NRF91')
nrfjprog.open()
try:
nrfjprog.connect_to_emu_without_snr(jlink_speed_khz=JLINK_SPEED_KHZ)
except:
print "No jlink detected!"
exit()
# Perform action
if args.action == "read":
# Read flash
bin_data = nrfjprog.read(addr=convert(args.start), data_len=convert(args.length))
# Write to file
fh = open(args.file, "wb")
fh.write(bytearray(bin_data))
fh.close()
else:
# Read file
fh = open(args.file, "rb")
bin_data = bytearray(fh.read())
fh.close()
print len(bin_data), args.length
# Write flash
if convert(args.length) == len(bin_data):
nrfjprog.write(addr=convert(args.start), data=bin_data, control=True)
else:
print "Number of bytes miss-match!"
# Cleanup
nrfjprog.close()
But, my written data and read data are different from each other. You can check my outputs.
Screenshot of terminal:
And this view is from text editor:
Do you have any idea about my issue? Thanks for your interest.
