Honored ContributorSOPC builder compiles some files automatically, such as pio_lcd16207.c, but i don't want to include this
file and it isn't used, either. I want to cut this file to save LEs of FPGA after compilation. I want to make the nios core thinner.how can I make it??? thank u. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif
Honored Contributor.c files contain software, not hardware. Compiling these files doesn't make your core any larger. If you have components in your system that you don't use, you can remove the hardware by right-clicking on the file in SOPC Builder and selecting remove.
Honored Contributori forgot to mention that i didn't use the nios development board of altera. I just wrote codes and then
put them in the rom of nios cpu without flash to store the object codes. So i think that the bigger my codes are, the more LEs will be used. Right?Honored ContributorGo into the Nios II IDE and create a new "Hello Freestanding" project. This is intended for more advanced users who want to squeeze every last byte out - the source code has comments that can assist you.
What you will want to do is build the free-standing example, and then alter the "alt_sys_init()" code we generate -- this function basically calls the initialization routines of the various peripherals in your system... you can just comment out the ones you dont want to use to save space. A note, though, if you modify the file with this alt_sys_init code, it will be over-written if you re-build (auto-generated file), it would be best to save your changes as your own source file/subroutine name and call that during boot-up. PS: Before you do this, you might also consider building the hello_world example and looking at the comments in its sorce file; it has instructions to reduce code size without switching over to the "freestanding" example.Honored Contributorthank u first, but I'm using the nios, not nios II.
Honored ContributorDid you have that LCD core originally and take it out? If so did you also re-generate the NIOS (because what you are describbing shouldn't happen).
Like what was said before, the code will not affect you're resource size (LEs). Basically the hardware is generated first then you're software is built using the characteristics of the system itself (that's why I'm wondering if you re-generated the NIOS or not). To get extra optimization you can us the -O3 parameter for the build (if you build from the prompt that is, otherwise I'm not sure if there is any other way). By default the software builds using -O2 optimization, I haven't really noticed a difference between -O3 and -O2 but you might. So the first step is to go into the SOPC and take a look at what's a part of the system you are generating with the NIOSHonored ContributorI didn't use the LCD core. I don't have the dev board. I think the pio_lcd16207.c file is generated for the dev
board and the germs_monitor.c's fucntion is the same. I have the idea to reduce nios soft core because I see the following info when generating system: # 2004.08.12.22:41:12 --- Compiling nios_uart.c # 2004.08.12.22:41:12 --- Assembling nios_zerorange.s # 2004.08.12.22:41:12 --- Compiling pio_lcd16207.c # 2004.08.12.22:41:12 --- Assembling pio_showhex.s # 2004.08.12.22:41:12 --- Compiling plugs.c Above is a part of the info. And also I don't want to compile the nios_uart.c file because I don't use the UART now. Is that clear? Maybe Jesse got it, but he answered about the nios II. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/sad.gif thank you.Honored ContributorIf it's just code being created I wouldn't worry about it then. But check the core in the project breakdown to make sure it's not in there somewhere as a design module.
