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FS#8155: Proper initialization of E8564 RTC (used in H10). Also fixes FS#8154 - Shutting down fails when RTC alarm is active. Thanks to Przemyslaw Holubowski for the bug report and fix.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15619 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Barry Wardell 2007-11-14 16:13:39 +00:00
parent 2bb48eb8ed
commit e18125eec2
1 changed files with 20 additions and 0 deletions
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20
firmware/drivers/rtc/rtc_e8564.c
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@ -24,8 +24,28 @@
#include "i2c-pp.h"
#include <stdbool.h>
/* RTC registers */
#define RTC_CTRL1 0x00
#define RTC_CTRL2 0x01
/* Control 2 register flags */
#define RTC_TF 0x04
#define RTC_AF 0x08
void rtc_init(void)
{
unsigned char tmp;
int rv;
/* initialize Control 1 register */
tmp = 0;
pp_i2c_send(0x51, RTC_CTRL1,tmp);
/* read value of the Control 2 register - we'll need it to preserve alarm and timer interrupt assertion flags */
rv = i2c_readbytes(0x51,RTC_CTRL2,1,&tmp);
/* clear alarm and timer interrupts */
tmp &= (RTC_TF | RTC_AF);
pp_i2c_send(0x51, RTC_CTRL2,tmp);
}
int rtc_read_datetime(unsigned char* buf)