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You could upload your code to a website and provde a link to it

Thanks Martin.

>>You could upload your code to a website and provde a link to it
>>in the posting. That's a less intrusive way ;-)

Alright Martin. I shall do this henceforth.

>>Do you want to run your design in hardware (FPGA) or just in
>>a ModelSim simulation?

Both. So I would need to have UART enabled.

>>If you want to run it in an FPGA you need the UART. How would
>>you download the Java program without a communication path
>>between your PC and JOP?

>>Even in the ModelSim simulation the UART makes sense. You
>>can debug your Java program with print outs. System.out.println()
>>goes to the UART.

>>So, there is no reason to remove the UART from the design.

Got it ! I shall rectify this.

>>looks, like you are only using transmit. No receive
>>port, right?

Yes thats how it is.

>>JOP (and each processor) will do nothing usefull without a program!
>>So you have to write your application (for JOP in Java) and download
>>it to the RAM.

Cheers Martin. I shall do this tomorrow and revert to you with my results
(and new queries if any :-) )

Thanks again...Tan.

p.s I have acknowledged all your help in the introduction of my Project
thesis work.  I shall be uploading it to opencores.org after my launch and
presentation scheduled on the 1st of Sept.

Martin Schoeberl wrote:
> 
> Hi Tan,
> 
>> That was not my intention Martin. I had to resort to asking you to have a
>> look at my code as I had no other option and I was unable to clearly
>> explain
>> my problem. I thought showing you my code would give you an idea of the
>> problem.
> 
> You could upload your code to a website and provde a link to it
> in the posting. That's a less intrusive way ;-)
> 
>> As per your advice yesterday, I enabled the mem_sc_if.vhd back. If you
>> remember you had once advised me to change the scio_dspio.vhd. I had
>> changed
>> it by replacing the ac97 component with I2S.Additionally the
>> scio_dspio.vhd
>> had a counter,a UART, a usb and  sc2wb. Since I wanted to use only sc2wb,
>> I
>> disabled  the UART and the USB blocks.
> 
> Do you want to run your design in hardware (FPGA) or just in
> a ModelSim simulation?
> 
> If you want to run it in an FPGA you need the UART. How would
> you download the Java program without a communication path
> between your PC and JOP?
> 
> Even in the ModelSim simulation the UART makes sense. You
> can debug your Java program with print outs. System.out.println()
> goes to the UART.
> 
> So, there is no reason to remove the UART from the design.
> 
>> I am pasting the modified code below:
>> -- SimpCon Wishbone bridge
>> cmp_wb: entity work.sc2wb generic map (
>> addr_bits => SLAVE_ADDR_BITS
>> )
>> port map(
>> clk => clk,
>> reset => reset,
>> address => address(SLAVE_ADDR_BITS-1 downto 0),
>> wr_data => wr_data,
>> rd => sc_rd(1),
>> wr => sc_wr(1),
>> rd_data => sc_dout(1),
>> rdy_cnt => sc_rdy_cnt(1),
>> wb_out => wb_out,
>> wb_in => wb_in );
> 
> looks ok, that's the same as in scio_dspio.vhd.
> 
>>   tx_i2s_sck             :  out std_logic;
>> tx_i2s_sd : out std_logic;
>> tx_i2s_ws : out std_logic;
>> tx_i2s_int :out  std_logic;
> 
> looks, like you are only using transmit. No receive
> port, right?
> 
>> This is the top module entity.The synthesis works fine but during
>> simulation,when I force the value to wr_data,there is no respone from
>> tx_i2s_sd. Do you see anything obviously wrong in what I have done?
> 
> Yes, this is the main issue.
> 
> Think about a processor (JOP is a processor). When you force just
> a value on the data bus, where the processor usually reads instructions
> and reads and writes values. What you you think what the processor
> will do?
> 
> JOP (and each processor) will do nothing usefull without a program!
> So you have to write your application (for JOP in Java) and download
> it to the RAM.
> 
> Start with a simple 'Hello World' and run this in the simulation
> or on the real hardware. Use the unmodified code first!!!
> 
> Than add your I2S interface and see if 'Hello World' still
> runns.
> 
> That's my way to perform changes to a unknown project. First
> get it unmodified running THAN apply the changes. I do this
> even when I'm working with JOP - first a clean, working
> strating point.
> 
> Cheers,
> Martin
> _______________________________________________
> http://www.opencores.org/mailman/listinfo/cores
> 
> 

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