devkitPro

take a step back.

how much memory are you trying to allocate? the ds only has 4MB of ram that is shared with both code and data. use the arm-none-eabi-size.exe program to see how much code and static data you have. that will let you know how much main ram will be available for use with malloc. is ...

try searching for mallinfo.

keep in mind that on a system with limited resources like the ds you can run into issue where you have enough free memory but it is fragmented - so you do not have a free chunk that is big enough to satisfy a malloc request. it can even come down to the order that ...

the ds lite does not have a builtin utility to edit the wifi connection data like the dsi or 3ds. however you can scan for access points using dswifi. you would need a way to select the right ap and provide a wep key if needed. the dswifi source wifi_arm9.c in particular Wifi_AutoConnect and Wifi ...

no - libnds would have been better than devkitarm

you would need to create something custom to get that functionality. the libnds console code is not setup to handle that use case. it is not impossible, but it would probably be easier to create something custom. take a look at the source code and ...

are you sure this is referring to the number of channels and not the size of an internal data structure?

before you go too far down this path - a better question would be why would you want to do this? just store it in a byte array and be done with it.

a common situation where this type of manipulation occurs is to write to a framebuffer in vram for updating the display. the ds can use a 16 bit ...

this can vary by platform, but common sizes are:
char 8 bit
short 16 bit
int 32 bit

you can use sizeof(int) to see the size in bytes (a byte being 8 bits always).

printf("size of unsigned short: %d\n",sizeof(unsigned short));

you have to use base types to create declarations or structs or classes ...

a few questions:
why do you want to optimize your code?
Is it running too slowly?
Is so, then where is it running too slowly?
Why do the think it is running slowly in this section?
Are you running out of memory?
If so, then how much free memory do you have, and how much more do you need?

running ...

Try desmume instead - or better yet, a real ds!

keyboardDemoInit installs the keyboard on the subscreen for layer 3.
keyboardInit(NULL, 3, BgType_Text4bpp, BgSize_T_256x512, defaultKeyboard.mapBase, defaultKeyboard.tileBase, false, true);
It is hard to give advice for layers and map/tile bases without knowing what (if anything) you want to use ...