TMS320F280049: Entering Low power mode while debugging.

Lingamurthy Komire

Part Number: TMS320F280049

I am using controller TMS320F280049. While debugging the code through Flash, at the point of GPBMUX1 control reg configuration, it is being suspended with a pop window showing device has entered Low power mode. The values are as shown below.

EALLOW;

GpioCtrlRegs.GPAMUX1.all &= ~(0xFF3FFF0F);

GpioCtrlRegs.GPAMUX2.all &= ~(0xFFFF003F);

GpioCtrlRegs.GPAGMUX1.all &= ~(0xFF3FFF0F);

GpioCtrlRegs.GPAGMUX2.all &= ~(0xFFFF003F);

GpioCtrlRegs.GPBMUX1.all &= ~(0x0003CCFF);

EDIS;

When I try to program for the second time, Programmer is unable to connect with Controller. Plz suggest.

over 6 years ago

0 Gautam Iyer over 6 years ago

Guru 192875 points

Hi,

Do check the XRS pin on scope. Also check this thread: e2e.ti.com/.../928276

Regards,
Gautam

0 Lingamurthy Komire over 6 years ago in reply to Gautam Iyer

Intellectual 295 points

XRS pin is observed on Scope. It is Logic High only. The error is displayed as shown below:

Trouble reading the register RPC:
Error - 1156@0x13. The device may be operating in Low power mode.

0 Nirav Ginwala over 6 years ago

TI__Genius 15385 points

While you are debugging you need to keep mux options for GPIO35 and GPIO37 as 15, which is the default/reset configuration for these pins. They are muxed as TDI and TDO pins which are used for JTAG communication, by changing these values debugger looses connection to the device, and F280049 micro will enter low power mode. If you change the configuration to below it should resolve your issue. While debugging you can keep the below configuration.

GpioCtrlRegs.GPBMUX1.all &= ~(0x0003C03F);

Regards,

Nirav

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TMS320F280049: Entering Low power mode while debugging.