Can not modify SCI registers

jim henderson

I am running lab02b on an F28069x ISO controlCARD. I start the debugger and break at main. When I try to modify the SCIA registers by clicking on the Value, the value does not change. See attached screenshot. Any idea why I can't modify the regs?

over 11 years ago

0 ChrisClearman over 11 years ago

TI__Guru** 119680 points

CLK_enableSciaClock(obj->clkHandle);

would need to be called in your HAL to insure the SCIA was operating. Also need to set-up the GPIO, etc.

Not sure which board you are using, so can't tell you if the HAL is set-up to turn SciA on or not...but sounds like not.

Try SciB, it is probably active. you can find all the SciB and do the same for SciA to make sure it's set-up the same.

0 jim henderson over 11 years ago in reply to ChrisClearman

Intellectual 510 points

I am issuing both CLK_enableSciaClock and CLK_enableScibClock.

So the registers are not writeable until I issue those commands?

Is there some other upstream clock I am supposed to enable as well?

0 Maria Todorova over 11 years ago in reply to jim henderson

Guru 13185 points

Hello Jim,

Besides enabling the clock, try to follow the step 1 and 6 from this thread below to initiate the based address of SCI

http://e2e.ti.com/support/microcontrollers/c2000/f/902/p/334989/1168654.aspx#1168654

Best regards,

Maria

0 jim henderson over 11 years ago in reply to Maria Todorova

Intellectual 510 points

That did the trick! I reinstalled lab01 and implemented your suggestions. Characters are now being transmitted to my terminal.

However, I am not receiving characters. I have an F28069M ISO controlCARD. I see there's an SW3 on the schematic that could open the RX connection. I don't have the card in front of me at the moment. Do you happen to know if SW3 position 2 is shipped open or closed?