RRFPMM configuring for VDD2X front-end supply on the RF430FRL152HEVM

Roland B

Hello I'm working with the NFC only example project,

when I'm trying to write into the RFPMMCTL0 register for activating the VDD2X (2.9V) supply for my analog front-end the debugger goes into the C_INT00_NOEXIT() function at the boot.c file and I can't go ahead debugging. First I'm trying to write

RFPMMCTL0 |= PMMPW;

as explained at the family data sheet. (btw: In the header file its PMMPW and on the family data sheet its RFPMMPW). Anyway the error from above.

Thanks for any help!

over 9 years ago

0 JD Crutchfield over 9 years ago

TI__Mastermind 26420 points

Hey Roland,

I'm not sure of the cause, but I'll look into it and ask around today.

What version of CCS are you running?
Is this only happening when you are debugging?
If you just run the code, do you still get stuck in the trap ISR?

This could possibly be a CCS issue, but We'll figure it out.

Thanks,
JD

0 Roland B over 9 years ago in reply to JD Crutchfield

Intellectual 320 points

I'm using CCS Version: 6.0.1.00040
When I'm just let the code run in the release mode it stucks also.

0 Alex K. over 9 years ago

TI__Expert 7820 points

RFPMMCTL0 high byte is the password which is 0xA5. However when you try to read the password, the register returns as 0x96.

But what the RFPMMCTL0 |= PMMPW does is it reads the register first and then or ins the password:

RFPMMCTL0 = RFPMMCTL0 | PMMPW

So what you are getting is RFPMMCTL0 = 0x9600 | 0xA500 which causes a password error and a reset.

I would recommend to do:

RFPMMCTL0 = PMMPW + any other settings.

0 Roland B over 9 years ago in reply to Alex K.

Intellectual 320 points

Trueee. It works. Thanks a lot!

0 Roland B over 9 years ago in reply to Alex K.

Intellectual 320 points

Ok It works but not with the RFPMM_BW_VR_VBN Bit that I want to set to VDDR

0 Alex K. over 9 years ago in reply to Roland B

TI__Expert 7820 points

I am not clear on total what you mean.
By writing the "other" bits you are not overwriting the password. Example:
RFPMMCTL0 = PMMPW | RFPMM_EN_BATSWITCH_BYTE
This equals RFPMMCTL0 = 0xA500 | 0x20
So there is no conflict. The high byte is the password and the low byte is the registers you need to set.

0 Alex K. over 9 years ago in reply to Alex K.

TI__Expert 7820 points

Well there is another way of doing this, I have not tested it though:
RFPMMCTL0 = PMMPB | RFPMMCTL0_L | your settings
This will read the low byte the data and still write the correct password.

0 Roland B over 9 years ago in reply to Alex K.

Intellectual 320 points

Sorry now I've got it...

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RRFPMM configuring for VDD2X front-end supply on the RF430FRL152HEVM