Hi, I'm working on a project were a need to be able to upload firmware
to a microcontroller based Ethernet device. But because of the memory
constraints the controller can only handle packages of 300 bytes each
time. So therefore the firmware file must be sent in chunks and i need
a header in each
[EMAIL PROTECTED] wrote:
Hi, I'm working on a project were a need to be able to upload firmware
to a microcontroller based Ethernet device. But because of the memory
constraints the controller can only handle packages of 300 bytes each
time. So therefore the firmware file must be sent in
Magnus Lycka wrote:
header_template = 'Chunk %05i, %03i bytes'
BTW, if the header is binary, you probably want to have a look at
the struct module. http://docs.python.org/lib/module-struct.html
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On 2005-08-22, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
I'm working on a project were a need to be able to upload firmware
to a microcontroller based Ethernet device. But because of the memory
constraints the controller can only handle packages of 300 bytes each
time. So therefore the
On 2005-08-22, Magnus Lycka [EMAIL PROTECTED] wrote:
Hi, I'm working on a project were a need to be able to upload firmware
to a microcontroller based Ethernet device. But because of the memory
constraints the controller can only handle packages of 300 bytes each
time. So therefore the
aaah, well i believe that in Windows XPSP2 has disabled raw socket
support (yes i sadly have to use windows) so that's no option. But I'll
try to put a time delay and check what happens. Or otherwise perhaps i
could do a socket.close each time, but that's a terrible waste of
packets.
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On 2005-08-22, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
aaah, well i believe that in Windows XPSP2 has disabled raw socket
support (yes i sadly have to use windows) so that's no option. But I'll
try to put a time delay and check what happens. Or otherwise perhaps i
could do a socket.close
Grant Edwards [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED]
It's very probable that the TCP stack will combine chunks and
send out full Ethernet frames (4K bytes).
You're probably going to have to either put a time delay in the
loop, or wait for each chunk to be acknowledged
I'm going to try the timed wait alternative, if i get it the
application to work properly i'll post the results in this group and
the code if anyone want's it. It's such a contrast to code a tcp-server
for the microcontroller (MC9S12NE64) in C and coding in python :-) I
really hope embedded python
[EMAIL PROTECTED] wrote:
I'm going to try the timed wait alternative, if i get it the
application to work properly i'll post the results in this group and
the code if anyone want's it. It's such a contrast to code a tcp-server
for the microcontroller (MC9S12NE64) in C and coding in python :-)
Grant Edwards [EMAIL PROTECTED] wrote:
You have no control over packet size in TCP if you use the
normal socket interface. About the only thing you can to is
put delays between calls to send() in hope that the TCP stack
will send a packet.
You can set the MTU (maximum transfer unit) for
yeah, i didn't mean running python on the HC12 but using compiled
python on a ARM7 or simular would be nice. There was a project for
embedded python but it seems to have died. Yeah i've been thinking
about using UDP but then i would have to impliment checksums and having
a reliable way to send and
On Mon, 22 Aug 2005, Grant Edwards wrote:
On 2005-08-22, Magnus Lycka [EMAIL PROTECTED] wrote:
Hi, I'm working on a project were a need to be able to upload firmware
to a microcontroller based Ethernet device. But because of the memory
constraints the controller can only handle packages of
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