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Sansa clip+: prevent an unnecessary OF database refresh when using the wake-up alarm with a uSD card inserted (probably works for other AMSv2 targets too)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27158 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Bertrik Sikken 2010-06-27 16:39:50 +00:00
parent 99517d6319
commit 9e86287946
1 changed files with 6 additions and 0 deletions
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6
firmware/drivers/rtc/rtc_as3514.c
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@ -100,6 +100,9 @@ void rtc_alarm_poweroff(void)
seconds |= 1<<7; /* enable bit */ seconds |= 1<<7; /* enable bit */
ascodec_write(AS3543_WAKEUP, seconds); ascodec_write(AS3543_WAKEUP, seconds);
/* write 0x80 to prevent the OF refreshing its database from the microSD */
ascodec_write(AS3543_WAKEUP, 0x80);
/* write our desired time of wake up to detect power-up from RTC */ /* write our desired time of wake up to detect power-up from RTC */
ascodec_write(AS3543_WAKEUP, wakeup_h); ascodec_write(AS3543_WAKEUP, wakeup_h);
ascodec_write(AS3543_WAKEUP, wakeup_m); ascodec_write(AS3543_WAKEUP, wakeup_m);
@ -128,6 +131,9 @@ bool rtc_check_alarm_started(bool release_alarm)
if(!(ascodec_read(AS3543_WAKEUP) & (1<<7))) /* enable bit */ if(!(ascodec_read(AS3543_WAKEUP) & (1<<7))) /* enable bit */
return false; return false;
/* skip WAKEUP[3] which the OF uses for other purposes */
ascodec_read(AS3543_WAKEUP);
/* subsequent reads give the 16 bytes static SRAM */ /* subsequent reads give the 16 bytes static SRAM */
wakeup_h = ascodec_read(AS3543_WAKEUP); wakeup_h = ascodec_read(AS3543_WAKEUP);
wakeup_m = ascodec_read(AS3543_WAKEUP); wakeup_m = ascodec_read(AS3543_WAKEUP);