TMS320F2837xD accessing GPIO by CPU2

Tomas Lehotsky

Hi,

I'm working with TMS320F2837xD device and I have a question about accessing GPIO pins from CPU2. For CPU1 project I'm using the code structure like this:

   EALLOW;
   	 GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 0x0000;
   	 GpioCtrlRegs.GPADIR.bit.GPIO19 = GpioCtrlRegs.GPADIR.bit.GPIO19 | (1);
   	 GpioDataRegs.GPADAT.bit.GPIO19 = 0;
   EDIS;

This works for CPU1 very well. But for CPU2 the access to GpioCtrlRegs is prohibited. Does it mean that for CPU2 projects I need to re-write this code structure to GPIO_ReadPin/GPIO_WritePin? Or is there any other way how to access GPIO pins from CPU2?

Thank you!

Best regards,

Tomas

over 9 years ago

0 Vivek Singh over 9 years ago

TI__Guru** 115881 points

Hi Tomas,

All the setting for GpioCtrlRegs need to be done by CPU1 only. CPU2 has access to GpioDatRegs. So while writing code you need to structured in such a way that common code which is applicable for CPU1 and CPU2 is in one part and the one which is only applicable for CPU1 is another (by having some #define).

Regards,

Vivek Singh

0 Vivek Singh over 9 years ago in reply to Vivek Singh

TI__Guru** 115881 points

Hi Tomas,

Let us know if you have any further queries on this topic.

Regards,
Vivek Singh

0 Tomas Lehotsky over 9 years ago in reply to Vivek Singh

Intellectual 995 points

Hi Vivek,

I can solve this problem and I don't have any other question in this case at this time.

Thank you!

Tomas

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F2837xD accessing GPIO by CPU2