bugAVR C Runtime Library - Bugs: bug #40569, sleep_bod_disable does not work in...


bug #40569: sleep_bod_disable does not work in attiny13a

Submitted by:  Matthijs Kooijman <matthijs>
Submitted on:  Wed 13 Nov 2013 05:14:47 PM UTC  
Category: HeaderSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Header files
Status: FixedPercent Complete: 0%
Assigned to: Pitchumani <pitchumani>Open/Closed: Closed
Release: 1.8.0Fixed Release: None

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Wed 30 Jul 2014 12:26:18 PM UTC, comment #2:

Looks good, thanks!

Matthijs Kooijman <matthijs>
Wed 30 Jul 2014 11:48:23 AM UTC, comment #1:


This patch has been applied and committed.

Thank you for the contribution.

Pitchumani <pitchumani>
Project MemberIn charge of this item.
Wed 13 Nov 2013 05:14:47 PM UTC, original submission:

The implementation of sleep_bod_disable for non-xmega mcu's is as follows (from avr/sleep.h):

#define sleep_bod_disable()
do {
uint8_t tempreg;
_asm_ __volatile__("in %[tempreg], %[mcucr]" "nt"
"ori %[tempreg], %[bods_bodse]" "nt"
"out %[mcucr], %[tempreg]" "nt"
"andi %[tempreg], %[not_bodse]" "nt"
"out %[mcucr], %[tempreg]"
: [tempreg] "=&d" (tempreg)
: [mcucr] "I" _SFR_IO_ADDR(MCUCR),
[bods_bodse] "i" (_BV(BODS) | _BV(BODSE)),
[not_bodse] "i" (~_BV(BODSE)));
} while (0)

However, this hardcodes MCUCR, while attiny13 uses BODCR for these bits (see page 33 of http://www.atmel.com/Images/doc8126.pdf).

A grep on BODSE and BPDSE (a typo, see #40567) shows that tn2313a and tn4313 also have the same problem.

Perhaps adding something like:

#ifdef BODCR

and then use BODSE_TEMP_REG in the ASM snippet would fix this?

Matthijs Kooijman <matthijs>


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    Follow 3 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Wed 30 Jul 2014 11:48:23 AM UTCpitchumaniStatusNone=>Fixed
    Wed 30 Jul 2014 10:52:58 AM UTCpitchumaniAssigned toNone=>pitchumani

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