AIC23 | C5509 | CCS | CSL | EMIF | EVM | GEL | GPIO | HPI | Interfacing | JTAG | McBSP | OMAP | Omap15 | OMAP59 | RTDX | SDRAM | TMS320VC5509 | USB | XDS5

Hello,

        I need to interface TMS320VC5509A with PC.... 5509A offers SPI,HPI,USB
communication,but i need RS232 communication, since it will be easy for
read/write operation using VB6.... Is there any specific interface IC to convert
avaliable protocol to RS232 protocol?.... Waiting for your reply....
Regards
Pradeep

(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

On Jun 11, 2010, at 21:40, m...@gmail.com wrote:
> I need to interface TMS320VC5509A with PC.... 5509A offers  
> SPI,HPI,USB communication,but i need RS232 communication, since it  
> will be easy for read/write operation using VB6.... Is there any  
> specific interface IC to convert avaliable protocol to RS232  
> protocol?.... Waiting for your reply....
>
> Regards
> Pradeep

The C5509A has more than just SPI.  The 3 McBSP ports should be  
capable of baud rates and data formats compatible with RS-232.  You  
don't need an interface IC, since you could just handle the level- 
shifting with discrete transistors and resistors.  But you can also  
search the Texas Instruments and Maxim web sites for an IC that would  
make this easy.

Better yet, you might think of finding USB support for VB6, and that  
might be easier than building hardware.

On the other hand, you could implement a USB communications class  
device on the C5509A, and then your chip will appear as a serial port  
to your PC.

There are lots of options.

Brian Willoughby

Sound Consulting

______________________________
New Code Sharing Section now Live on DSPRelated.com. Learn about the Reward Program for Contributors here.



(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

Pradeep,

I've had a lot of success with the MAX3111.  It has a SPI interface on
one side, and full RS-232 on the other, and is powered with a single
3.3V supply.

Regards,
Bill 

> -----Original Message-----
> From: c...@yahoogroups.com [mailto:c...@yahoogroups.com] On 
> Behalf Of m...@gmail.com
> Sent: Saturday, June 12, 2010 12:41 AM
> To: c...@yahoogroups.com
> Subject: [c55x] Interfacing TMS320VC5509A with PC
> 
> Hello,
> 
>         I need to interface TMS320VC5509A with PC.... 5509A 
> offers SPI,HPI,USB communication,but i need RS232 
> communication, since it will be easy for read/write operation 
> using VB6.... Is there any specific interface IC to convert 
> avaliable protocol to RS232 protocol?.... Waiting for your reply....
> Regards
> Pradeep    
>

______________________________
Start your Android Ice Cream Sandwich development on TI's AM35x Sitara ARM Cortex-A8 processor today.



(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

Pradeep-

>         I need to interface TMS320VC5509A with PC.... 5509A offers
> SPI,HPI,USB communication,but i need RS232
> communication, since it will be easy for read/write operation using
> VB6.... Is there any specific interface IC
> to convert avaliable protocol to RS232 protocol?.... Waiting for
> your reply....

Bill's suggestion of MAX3111 is good.  If you happen to have a CPLD already on
the board, another option is a bit of
logic to convert from async to sync.  On a Xilinx CPLD that might take around 50
macrocells.  In that case you might
still need a transceiver or other circuitry for level shift.

-Jeff

(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

Thank you so much for your valuable replies.... Thank you Bill, for suggesting
MAX3111, which will better for RS232 comm... Should i use MAX232 for voltage
level shifiting?....  

Thank you Sound, i am searching for USB support in VB6... Core voltage of USB is
3.3v, then how to convert for PC's 5v?.... How to implement USB communications
class device on 5509A?....

______________________________
New Code Sharing Section now Live on DSPRelated.com. Learn about the Reward Program for Contributors here.



(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

Hi,
All these suggestions sound great, what I have done in some of my 
projects is add an MSP430F from TI, they are easy to program and come 
with a wide range of interfaces (SPI, UART etc), many packages and are 
quite cheap. Using an MSP430 offers other functionality like RTC or 
System Power Controller. They will run from a cheap 32.768 khz crystal.
-Gwyn

Gwyn Evans
Mobile Video Systems
Drachenseestr. 12
81373 München
+491733510658
On 14.06.2010 18:39, Jeff Brower wrote:
>
> Pradeep-
>
> > I need to interface TMS320VC5509A with PC.... 5509A offers
> > SPI,HPI,USB communication,but i need RS232
> > communication, since it will be easy for read/write operation using
> > VB6.... Is there any specific interface IC
> > to convert avaliable protocol to RS232 protocol?.... Waiting for
> > your reply....
>
> Bill's suggestion of MAX3111 is good. If you happen to have a CPLD 
> already on the board, another option is a bit of
> logic to convert from async to sync. On a Xilinx CPLD that might take 
> around 50 macrocells. In that case you might
> still need a transceiver or other circuitry for level shift.
>
> -Jeff

______________________________
Start your Android Ice Cream Sandwich development on TI's AM35x Sitara ARM Cortex-A8 processor today.



(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

Forget what I said about McBSP and RS-232.  I knew there was  
something that I was overlooking!  The McBSP is synchronous, as Jeff  
points out, and that's difficult to interface with asynchronous  
RS-232 without supporting hardware.  Bill's MAX3111 is probably your  
best bet.

Still, my other suggestions to find a USB library for VB6 or even  
just implement your C5509A board so that it appears as a standard  
serial port will work without any hardware.

Brian Willoughby
Sound Consulting
On Jun 13, 2010, at 20:46, Sound Consulting wrote:
> The C5509A has more than just SPI. The 3 McBSP ports should be
> capable of baud rates and data formats compatible with RS-232. You
> don't need an interface IC, since you could just handle the level-
> shifting with discrete transistors and resistors. But you can also
> search the Texas Instruments and Maxim web sites for an IC that would
> make this easy.
>
> Better yet, you might think of finding USB support for VB6, and that
> might be easier than building hardware.
>
> On the other hand, you could implement a USB communications class
> device on the C5509A, and then your chip will appear as a serial port
> to your PC.
>
> There are lots of options.

______________________________
New Code Sharing Section now Live on DSPRelated.com. Learn about the Reward Program for Contributors here.



(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

One of the niceties of the MAX3111 is the fact that it includes the
UART, the SPI interface, and the RS-232 level shifting all in one
product, with low-power draw, from one voltage supply.

Regards,
Bill
> -----Original Message-----
> From: c...@yahoogroups.com [mailto:c...@yahoogroups.com] On 
> Behalf Of m...@gmail.com
> Sent: Tuesday, June 15, 2010 2:00 AM
> To: c...@yahoogroups.com
> Subject: [c55x] Re: Interfacing TMS320VC5509A with PC
> 
> Thank you so much for your valuable replies.... Thank you 
> Bill, for suggesting MAX3111, which will better for RS232 
> comm... Should i use MAX232 for voltage level shifiting?....  
> 
> Thank you Sound, i am searching for USB support in VB6... 
> Core voltage of USB is 3.3v, then how to convert for PC's 
> 5v?.... How to implement USB communications class device on 
> 5509A?....      
>

______________________________
New Code Sharing Section now Live on DSPRelated.com. Learn about the Reward Program for Contributors here.



(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

On Jun 14, 2010, at 22:59, m...@gmail.com wrote:
> Thank you Bill, for suggesting MAX3111, which will better for RS232  
> comm... Should i use MAX232 for voltage level shifiting?....

The MAX3111 already incorporates voltage level shifting.  You provide  
3.3V to the chip and it provides internal +5.5V and -5.5V supplies  
for the RS-232.  It can withstand RS-232 voltages up to +/-12V in  
shutdown, and +/-25V in operation.  Why would you need the MAX232?   
Is it really necessary to have +/-15V just to communicate with a PC  
RS-232?

> Thank you Sound, i am searching for USB support in VB6...

You might also consider developing some code in C, and then interface  
that to VB.  VB is not typically the first choice for communicating  
with hardware.

> Core voltage of USB is 3.3v, then how to convert for PC's 5v?....

What is the context of your question?  Do you want to go from 3.3V to  
5V or from 5V to 3.3V?

Do you already have a board design for your 5509A?  Do you need to  
take the 5V nominal USB voltage down to 3.3V for the DSP?

Keep in mind that the MAX3111 has internal voltage boost circuits to  
go from +3.3V to +/-5.5V

> How to implement USB communications class device on 5509A?....
>

That's a big question.  See the USB specifications and the Texas  
Instruments sample code for the 5509A.

Brian Willoughby
Sound Consulting

______________________________
New Code Sharing Section now Live on DSPRelated.com. Learn about the Reward Program for Contributors here.



(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

What is the context of your question? Do you want to go from 3.3V to 
5V or from 5V to 3.3V?

Do you already have a board design for your 5509A? Do you need to 
take the 5V nominal USB voltage down to 3.3V for the DSP?
       The supply voltage of PC is 5v.... Th voltage of the DSP USB is 3.3v...
If we interface DSP USB with system's USB, will it not damage the device?...
Since the operating voltage of DSP is 3.3 to 3.6v....

(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

On Jun 15, 2010, at 22:14, m...@gmail.com wrote:
>> What is the context of your question? Do you want to go from 3.3V to
>> 5V or from 5V to 3.3V?
>>
>> Do you already have a board design for your 5509A? Do you need to
>> take the 5V nominal USB voltage down to 3.3V for the DSP?
>>
> The supply voltage of PC is 5v.... Th voltage of the DSP USB is  
> 3.3v... If we interface DSP USB with system's USB, will it not  
> damage the device?... Since the operating voltage of DSP is 3.3 to  
> 3.6v....

It seems like you're saying that you have not designed your board  
yet.  I suggest that you look on the Texas Instruments site for some  
of the reference schematics.  They show a number of options for  
making a board with USB and the 5509A.

In general, though, USB provides anywhere from 4.0V to 5.25V, and so  
it is expected that you place a 3.3V regulator, usually of the LDO  
variety, on your circuit board to power 3.3V parts like the DSP.  The  
DSP wires D+ and D- directly to the USB connector, but the VUSB  
signal must only connect to the input of the LDO regulator.  From  
there, the output of the regulator connects to the DSP.  It can be  
confusing, since the DSP has multiple 3.3V input pins, including one  
specifically for USB.  After you've handled the power correctly,  
there are also some requirements for the D+ and D- signals, including  
series resistance, capacitive filtering, etc.

I think most of your questions will be answered with the schematics  
for the evaluation boards.

Brian Willoughby
Sound Consulting

______________________________
New Code Sharing Section now Live on DSPRelated.com. Learn about the Reward Program for Contributors here.



(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )

Thank you so much..... Evaulation PDF helps me a lot....

______________________________
New Code Sharing Section now Live on DSPRelated.com. Learn about the Reward Program for Contributors here.



(You need to be a member of c55x -- send a blank email to c55x-subscribe@yahoogroups.com )