communicating between UART and Memory dev ?

[Altera_Forum]

I am having a onchip memory on which i wish to write through input device like uart and futhur what ever i have written i want it to be looped back i.e then i want to read the contents from the memory. 

 i can capture what ever is coming to uart but not sure how to write into the memory . Do i need to treat onchip as a device file simillar to uart and using fopen(),fread() etc commands to read and write into the memory.  please help me out over this..  regards , Sankalp

[Altera_Forum]

Hi Sankalp, 

 You can always read and write to memory using below:  IOWR_32DIRECT(address, offset, pattern); // for write  IORD_32DIRECT(address, pattern); // for read  -Baycool

[Altera_Forum]

--- Quote Start ---  originally posted by baycool@Sep 30 2005, 03:12 PM hi  sankalp,  you can always read and write to memory using below:  iowr_32direct(address, offset, pattern); // for write  iord_32direct(address, pattern); // for read  -baycool <div align='right'><{post_snapback}> (index.php?act=findpost&pid=10075)  --- quote end ---    --- Quote End ---    hi ,  Could i know more about these functions? I am able to capture character through Uart using fget(ch) into a char variable, now how to use the above funtions to write into an onchip memory.i.e what will be the address,offset?  Could you please help me out ?   Regards, Sankalp

[Altera_Forum]

To put it another way: 

  IOWR_32DIRECT(base address, offset from base address, data you want to write); // for write  IORD_32DIRECT(base address, offset from base address); // for read  If you want to see their definitions take a look at components\altera_nios2\HAL\inc\io.h (they boil down to a data cache bypassing read or write instruction)

[Altera_Forum]

--- Quote Start ---  originally posted by sankalp.singhal@Oct 4 2005, 01:56 AM how to use the above funtions to write into an onchip memory.i.e what will be the address,offset?<div align='right'><{post_snapback}> (index.php?act=findpost&pid=10119)  --- quote end ---    --- Quote End ---   Create the onchip memory peripheral in SOPC Builder, and give it an appropriate name. Regenerate your system. In the IDE, regenerate your project&#39;s system library. Open the system.h file in there and somewhere in there is the base address of the memory peripheral.  For example, if I created an "On-chip memory (RAM or ROM)" device and named it "UART_cache", then regenerate SOPC, then regenerate system library, somewhere in the system library&#39;s system.h file will be a# define setting UART_CACHE_BASE to the base address of the on-chip memory. I don&#39;t remember if there is also a symbol generated for the memory&#39;s size.

[Altera_Forum]

Hi there, 

 Kindly, I have Terasic DE2-70 board with Nios 2 IDE v11.0 to develop some application on it, but I have a problem it is: how can I (store/read) data (to/from) my host computer(Hard Disk for example) on running time by using ANSII C library function such as (fopen() , fget(), fput(), .....); Could somebody please assist me on that. Thanks.....................

[Altera_Forum]

You can do that only if you run your application with the debugger and use the host filesystem software component.