The value of Baud rate

Rachit Jain

Other Parts Discussed in Thread: TMS320F2812, MAX232

Hello,

I'm currently using TMS320F2812 and using SCI to transmit the values. I want a baud rate of 9600 and my clock frequency is 30 MHz.

The BRR value comes out to be 1E7 in hex. So i have give-

ScibRegs.SCIHBAUD = 0x0001;
ScibRegs.SCILBAUD = 0x00E7;

i use a prescale of 4 and

SysCtrlRegs.PLLCR.bit.DIV = 10;

But im not getting the values on the HyperTerminal on my PC.

Can you please point out the mistake in my code or in my calculation.

Thanks in advance.

PS- I'm a beginner.

over 12 years ago

0 Gautam Iyer over 12 years ago

Guru 192875 points

But im not getting the values on the HyperTerminal on my PC.

Can you please point out the mistake in my code or in my calculation.

First of all, do you've a dev kit or custom board?

Regards,

Gautam

0 Rachit Jain over 12 years ago in reply to Gautam Iyer

Intellectual 265 points

Yes, i do have a dev kit.

0 Gautam Iyer over 12 years ago in reply to Rachit Jain

Guru 192875 points

So, does it have a level shifter IC like MAX232? Do check the schematics. You cannot connect Rx Tx lines of mcu directly to PC.

Regards,

Gautam

0 Maria Todorova over 12 years ago in reply to Gautam Iyer

Guru 13185 points

Hello,

Is it related to this thread?

Are you using SCI-A or SCI-B this time?

0 Rachit Jain over 12 years ago in reply to Maria Todorova

Intellectual 265 points

There was some loose connection. I had to connect via a different port to my PC.

Had to bang my head for 2 hours and i thought my calculations were wrong.

BTW thanks for your time Gautam and Maria.

Im using SCIB as SCIA is also used for flash programming in my board.

0 Maria Todorova over 12 years ago in reply to Rachit Jain

Guru 13185 points

So does it work now? The problem is solved, right?

If so, please close this thread.

And you are welcome :)

Good luck and cheers!

Best regards,

Maria

0 Gautam Iyer over 12 years ago in reply to Rachit Jain

Guru 192875 points

So, I guess allz working well, right?

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The value of Baud rate