Read/Write image file in Nios II

[Altera_Forum]

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]

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]

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

[Altera_Forum]

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