Need help regarding NIOS

[abhimanyu26]

I am a beginner with NIOS and have little knowledge about C and making application.

I need to know about on chip memory and why it is used.

Also need help as how to approach to make an application.

Thanks

 

[std_match]

The onchip memory is faster.
You should find a tutorial for your development board, and follow it from start to end.
There are a lot of steps involved.
When the tutorial project works you can modify it to suit your needs.

 

[abhimanyu26]

thanks for ur reply. but i have done the address mapping but am getting overlapping error issues. I am encountering an error that JTAG debug module overlaps onchip memory.

I have taken 20 KB on chip memory and have assigned onchip memory as 0x0000 - 0x4FFF
and JTAG debug Module as 0x5000 - 0x57FF. But encountering the following error as mentioned below.

""" Error: System.nios2_qsys_0.data_master: nios2_qsys_0.jtag_debug_module (0x5000..0x57ff) overlaps onchip_memory2_0.s1 (0x0..0x7fff) """
""" Error: System.nios2_qsys_0.instruction_master: nios2_qsys_0.jtag_debug_module (0x5000..0x57ff) overlaps onchip_memory2_0.s1 (0x0..0x7fff) """

and want to know what is reset vector exception and exception vector memory

Thanks

 

[abhimanyu26]

I am confused about reset memory vector and exception memory vector. Can anyone please clarify what exactly are both these thing????

Thanks
Abhimanyu

 

[aruipksni]

thanks for ur reply. but i have done the address mapping but am getting overlapping error issues. I am encountering an error that JTAG debug module overlaps onchip memory.

I have taken 20 KB on chip memory and have assigned onchip memory as 0x0000 - 0x4FFF
and JTAG debug Module as 0x5000 - 0x57FF. But encountering the following error as mentioned below.

""" Error: System.nios2_qsys_0.data_master: nios2_qsys_0.jtag_debug_module (0x5000..0x57ff) overlaps onchip_memory2_0.s1 (0x0..0x7fff) """
""" Error: System.nios2_qsys_0.instruction_master: nios2_qsys_0.jtag_debug_module (0x5000..0x57ff) overlaps onchip_memory2_0.s1 (0x0..0x7fff) """

and want to know what is reset vector exception and exception vector memory

Thanks

i guess when you have a ram it uses it's entire memory space 2^15 = 32k so 0x4fff is rounded up to 7fff.
try map your jtag debug module to 0x8000