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Altera_Forum
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19 years ago

direct serial cable to FPGA?

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/blink.gif Hi this is Yong. I am learning about NiosII processor. I&#39;m just wondering whether I can send data from some Nios...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

Hello Yong,

About your questions:

1) A way that I have to download data directly from host (I supposse it`s what you&#39;ve questioned) it`s through opening files. In the C/C++ Application you simply lead with files through commands like "filePointer = fopen(file_name, "r");". However to lead with them it`s nececessary to change same settings your project in Nios. In the System Library Properties of your project, select &#39;Software Components...&#39; --> &#39;Altera Host Based File System&#39; and mark the box &#39;Add this software component&#39;. Using this resource, however, is only possible in the Debug mode.

An example of code in C/C++ APlication:

FILE* fp = NULL;

fp = fopen(\mnt\host\<file_name>,"r");

...

<read data from the file and stores them in a temporary variable, for example>

...

fclose(fp);

The path \mnt\host\ is necessary to the system localize the file which may be in the directory of your project.

2) You can use functions as &#39;clock()&#39; in your C file, to measure time in ms. See also the file &#39;leading_zeros.c&#39; avaliable in Altera page. It presents a way to measure time in clocks.

Good Luck.