Read/Write image file in Nios II

Altera_Forum · ‎05-03-2016

Hi Everyone,

I want to load an image file (.bmp) using the Nios II but I can not! I used the fopen command and managed to load the image, but when I try to write in another file something happens that the image comes out deformed.

Does anyone know how I can load images in the Nios II?

Thank you!

Altera_Forum · ‎05-31-2016

Hello,

It is not easy to solve your issue, i do not have a lot of info.

There are different flags that you can use with the fopen command in C.

One of them determines if you read the file binairy or in a sort of interpreted text mode.

Are you reading the files in binairy mode ? (fopen with flags "rb+" and "wb+"), if not, interpretation CR/LF can cause deformation of data.

Best Regards,

Johi.

Altera_Forum · ‎08-17-2016

bitmap files have header that stores information about them, see if this header is corrupted.

Altera_Forum · ‎10-17-2016

I have used the Demonstration project from DE2-115 DVD and got an FAT library, now I can open files.