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ntruchsess / arduino_uip

UIPEthernet: A plugin-replacement of the stock Arduino Ethernet library for ENC28J60 shields and breakout boards. Full support for persistent (streaming) TCP-connections and UDP (Client and Server each), ARP, ICMP, DHCP and DNS. Build around Adam Dunkels uIP Stack. Further developed version can be found on https://github.com/UIPEthernet/UIPEthernet
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Low Memory when using Arduino Nano #158

Open ido-ran opened 8 years ago

ido-ran commented 8 years ago

Hi, I'm trying to use UIP for a project I'm building with Arduino Nano and this is the result of compiling a sketch that use only UIP, without any other code.

Sketch uses 22,126 bytes (72%) of program storage space. Maximum is 30,720 bytes. Global variables use 1,545 bytes (75%) of dynamic memory, leaving 503 bytes for local variables. Maximum is 2,048 bytes. Low memory available, stability problems may occur.

As you can see there are only 503 bytes left and it is considered low memory. I'm interested to know if there is a way to remove parts that I don't need from UIP such as the server and UDP classes?

Thank you, Ido.

mfe5003 commented 8 years ago

There is a configuration setting in utility/uipethernet-conf.h that can turn off UDP if you dont need it.

ido-ran commented 8 years ago

Thank you. Is there a way to turn it off from the sketch without changing the source code?

On Jun 28, 2016, at 17:54, Matthew Ebert notifications@github.com wrote:

There is a configuration setting in utility/uipethernet-conf.h that can turn off UDP if you dont need it.

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mfe5003 commented 8 years ago

Not within the arduino IDE.
You could try compiling the library with a different output file name and the correct value of the macro passed, then link to the new object when building the hex file.

I'm don't know if that is the correct way to do it, I would just change the source.

ido-ran commented 8 years ago

Ok, thanks

On Jun 28, 2016, at 18:05, Matthew Ebert notifications@github.com wrote:

Not within the arduino IDE.

You could try compiling the library with a different output file name and the correct value of the macro passed, then link to the new object when building the hex file.

I'm don't know if that is the correct way to do it, I would just change the source.

— You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or mute the thread.

ido-ran commented 8 years ago

I've try set UIP_CONF_UDP to 0 and I got this error: MyProject.ino:111: undefined reference toUIPEthernetClass::begin(unsigned char const*)'`

If I change it back to 1 it compile just fine.

mfe5003 commented 8 years ago

Without seeing your code, I am guessing that you're trying to use DHCP. That protocol requires UDP. Try compiling with a static address.

ido-ran commented 8 years ago

Yes, you are right :)

ido-ran commented 8 years ago

New issue (still related to size limitation). I've actually run out of memory, I have 27 bytes left and it cause the Arudino to restart when calling Ethernet.begin function. So, I've change UIP_CONF_UDP to 0 and set all the begin parameters hardcoded exactly like it was getting from the DHCP. The problem is now the connection to the server is always failing. I've try different IPs but they all fail.

Are you sure there is no other things I can shave off, as DHCP is very useful.