Sam B wrote:
> Hi all,
> 
> Many thanks for reading my post.
> 
> I would like to design a custom DSP board for some quite strong audio 
> processing. I would like to put the complete project under GNU licence, 
> so I would like to have a maximum of free (or not too expensive) tools.
> 
> I think about using a TI C6722, it seems to fit my needs. I also found a 
> GCC and BINUTILS port for C6000. My first question is : is it possible 
> to program the board without an emulator ? (I think it is, one way would 
> be to program the flash directly with a programmer, but is it possible 
> with a simple JTAG interface ? Just like a ByteBlaster...)
> 
> My second question is : is it possible to route it on a 2-layer pcb, or 
> should I even not give a try ? I would like to have on that board : one 
> FPGA, some SDRAM, an audio codec, a Flash for the firm, and of course 
> the CPU.
> 
> Many thanks for your answers.
> 
> Sam

I'd recommend sticking with a DSK.  With the DSK you will have advanced 
debugging capabilities since it has on-board emulation logic.  You would 
also get CCS for developing your DSP code.  There are also tools 
available for burning your application into the flash.

If you create your own board you will either need to shell out 
$1000-$1800 for an XDS510 emulator or else you'll need to do a lot of 
work trying to come up with some other interface to talk to the device. 
  The available bootmodes on the 6722 are flash, SPI, I2C and the host 
port interface so you'd need to figure out a method to interface a PC to 
one of those.

I heard that someone had created a 2-layer board with the 6722 but I do 
not have any further details beyond that.  So it's definitely possible 
but I don't know how much effort was involved or how skilled the person 
was who laid it out.

Good luck!

Brad

Hi all,

Many thanks for reading my post.

I would like to design a custom DSP board for some quite strong audio 
processing. I would like to put the complete project under GNU licence, 
so I would like to have a maximum of free (or not too expensive) tools.

I think about using a TI C6722, it seems to fit my needs. I also found a 
GCC and BINUTILS port for C6000. My first question is : is it possible 
to program the board without an emulator ? (I think it is, one way would 
be to program the flash directly with a programmer, but is it possible 
with a simple JTAG interface ? Just like a ByteBlaster...)

My second question is : is it possible to route it on a 2-layer pcb, or 
should I even not give a try ? I would like to have on that board : one 
FPGA, some SDRAM, an audio codec, a Flash for the firm, and of course 
the CPU.

Many thanks for your answers.

Sam