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Added rtc_read_multiple()

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2862 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2002-11-20 00:00:56 +00:00
parent 85969853d5
commit d3d1583adb
2 changed files with 34 additions and 1 deletions
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34
firmware/drivers/rtc.c
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@ -65,7 +65,6 @@ int rtc_write(unsigned char address, unsigned char value)
return ret; return ret;
} }
int rtc_read(unsigned char address) int rtc_read(unsigned char address)
{ {
int value = -1; int value = -1;
@ -92,4 +91,37 @@ int rtc_read(unsigned char address)
return value; return value;
} }
int rtc_read_multiple(unsigned char address, unsigned char *buf, int numbytes)
{
int ret = 0;
unsigned char obuf[1];
int i;
i2c_begin();
obuf[0] = address;
/* send read command */
if (i2c_write(RTC_DEV_READ, obuf, 1) >= 0)
{
i2c_start();
i2c_outb(RTC_DEV_READ);
if (i2c_getack())
{
for(i = 0;i < numbytes-1;i++)
buf[i] = i2c_inb(0);
buf[i] = i2c_inb(1);
}
else
{
ret = -1;
}
}
i2c_stop();
i2c_end();
return ret;
}
#endif #endif

1
firmware/drivers/rtc.h
View file

@ -22,6 +22,7 @@
#ifdef HAVE_RTC #ifdef HAVE_RTC
void rtc_init(void); void rtc_init(void);
int rtc_read(unsigned char address); int rtc_read(unsigned char address);
int rtc_read_multiple(unsigned char address, unsigned char *buf, int numbytes);
int rtc_write(unsigned char address, unsigned char value); int rtc_write(unsigned char address, unsigned char value);
#endif #endif