printf function not working with RAM Linker cmd file

Printf takes quite a bit of heap memory space. I would start by increasing the size of the heap.

There are other debug tips here:
processors.wiki.ti.com/.../Tips_for_using_printf

Regards
Lori

Increasing the heap size did not help. I am going through the link you send.
Will update you.

I read through the wiki page - included stdio, stack and heap size set to 0x400, CIO Enabled, printf support set to minimal and .cio section is allocated in cmd file. Still doesn't work.

I created a new empty project, with the same Build configuration of my project and the same 2807x_RAM_CLA_lnk_cpu1.cmd file of my project and the printf function worked.

But it doesn't work with my project. I found that the program is stuck in a while loop in malloc() function in memory.c source file.

    /*-----------------------------------------------------------------------*/
    /* Find the first block large enough to hold the requested allocation    */
    /*-----------------------------------------------------------------------*/
    while (current != LIMIT && -current->packet_size < allocsize)
    {
	prev = current;
	current = current->next_free;
    }

Please let me know how to resolve this?

Prakash,

I'm going to move your thread to the compiler forum for the experts there to take a look.

Regards
Lori

Make sure .sysmem and .esysmem are in RAM, not FLASH

I added the setvbuf() function and it worked.

Do I have to use it in the FLASH mode as well or just for the RAM mode?

Thank You.

The .esysmem is in RAM, but there is no .sysmem in the linker cmd file(F2807x_RAM_CLA_lnk_cpu1.cmd).

Using setvbuf should not be required in either mode. I suggested it as a workaround to the problem of malloc failing to return.

Please note that in RAM mode, you will need to load the program afresh every time you want to run it so that initialized data gets the correct load-time values.