1 files changed, 133 insertions, 5 deletions

diff --git a/firmware/drivers/rtc/rtc_e8564.c b/firmware/drivers/rtc/rtc_e8564.c
index c3ae9349f4..0e81ee276d 100644
--- a/firmware/drivers/rtc/rtc_e8564.c
+++ b/firmware/drivers/rtc/rtc_e8564.c
@@ -7,7 +7,8 @@
  *                     \/            \/     \/    \/            \/
  * $Id$
  *
- * Copyright (C) 2002 by Linus Nielsen Feltzing, Uwe Freese, Laurent Baum
+ * Copyright (C) 2002 by Linus Nielsen Feltzing, Uwe Freese, Laurent Baum, 
+ *                       Przemyslaw Holubowski
  *
  * All files in this archive are subject to the GNU General Public License.
  * See the file COPYING in the source tree root for full license agreement.
@@ -25,12 +26,27 @@
 #include <stdbool.h>
 
 /* RTC registers */
-#define RTC_CTRL1   0x00
-#define RTC_CTRL2   0x01
+#define RTC_CTRL1          0x00
+#define RTC_CTRL2          0x01
+#define RTC_ALARM_MINUTES  0x09
+#define RTC_ALARM_HOURS    0x0A
+#define RTC_ALARM_DAY      0x0B
+#define RTC_ALARM_WDAY     0x0C
+#define RTC_TIMER_CTRL     0x0E
+#define RTC_TIMER          0x0F
 
 /* Control 2 register flags */
-#define RTC_TF  0x04
-#define RTC_AF  0x08
+#define RTC_TIE    0x01
+#define RTC_AIE    0x02
+#define RTC_TF     0x04
+#define RTC_AF     0x08
+#define RTC_TI_TP  0x10
+
+/* Alarm registers flags */
+#define RTC_AE     0x80
+
+/* Timer register flags */
+#define RTC_TE     0x80
 
 void rtc_init(void)
 {
@@ -82,3 +98,115 @@ int rtc_write_datetime(unsigned char* buf)
     return 1;
 }
 
+void rtc_set_alarm(int h, int m)
+{
+    unsigned char buf[4]={0};
+    int rv=0;
+    int i=0;
+    
+    /* clear alarm interrupt */
+    rv = i2c_readbytes(0x51,RTC_CTRL2,1,buf);
+    buf[0] &= RTC_AF;
+    pp_i2c_send(0x51, RTC_CTRL2,buf[0]);
+    
+    /* prepare new alarm */
+    if( m >= 0 )
+        buf[0] = (((m/10) << 4) | m%10);
+    else
+        /* ignore minutes comparison query */
+        buf[0] = RTC_AE;
+    
+    if( h >= 0 )
+        buf[1] = (((h/10) << 4) | h%10);
+    else
+        /* ignore hours comparison query */
+        buf[1] = RTC_AE;
+    
+    /* ignore day and wday */
+    buf[2] = RTC_AE;
+    buf[3] = RTC_AE;
+    
+    /* write new alarm */
+    for(;i<4;i++)
+        pp_i2c_send(0x51, RTC_ALARM_MINUTES+i,buf[i]);
+    
+    /* note: alarm is not enabled at the point */
+}
+
+void rtc_get_alarm(int *h, int *m)
+{
+    unsigned char buf[4]={0};
+    
+    /* get alarm preset */
+    i2c_readbytes(0x51, RTC_ALARM_MINUTES,4,buf);
+
+    *m = ((buf[0] >> 4) & 0x7)*10 + (buf[0] & 0x0f);
+    *h = ((buf[1] >> 4) & 0x3)*10 + (buf[1] & 0x0f);
+
+}
+
+bool rtc_enable_alarm(bool enable)
+{
+    unsigned char tmp=0;
+    int rv=0;
+    
+    if(enable)
+    {
+        /* enable alarm interrupt */
+        rv = i2c_readbytes(0x51,RTC_CTRL2,1,&tmp);
+        tmp |= RTC_AIE;
+        pp_i2c_send(0x51, RTC_CTRL2,tmp);
+    }
+    else
+    {
+        /* disable alarm interrupt */
+        rv = i2c_readbytes(0x51,RTC_CTRL2,1,&tmp);
+        tmp &= ~RTC_AIE;
+        pp_i2c_send(0x51, RTC_CTRL2,tmp);
+    }
+    
+    return false;
+}
+
+bool rtc_check_alarm_started(bool release_alarm)
+{
+    static bool alarm_state, run_before = false;
+    unsigned char tmp=0;
+    bool started;
+    int rv=0;
+
+    if (run_before)
+    {
+        started = alarm_state;
+        alarm_state &= ~release_alarm;         
+    } 
+    else 
+    { 
+        /* read Control 2 register which contains alarm flag */
+        rv = i2c_readbytes(0x51,RTC_CTRL2,1,&tmp);
+
+        alarm_state = started = tmp & (RTC_AF | RTC_AIE);
+        
+        if(release_alarm)
+        {
+            rv = i2c_readbytes(0x51,RTC_CTRL2,1,&tmp);
+            /* clear alarm interrupt enable and alarm flag */
+            tmp &= ~(RTC_AF | RTC_AIE);
+            pp_i2c_send(0x51, RTC_CTRL2,tmp);
+        }
+        run_before = true;
+    }
+    
+    return started;
+}
+
+bool rtc_check_alarm_flag(void)
+{
+    unsigned char tmp=0;
+    int rv=0;
+    
+    /* read Control 2 register which contains alarm flag */
+    rv = i2c_readbytes(0x51,RTC_CTRL2,1,&tmp);
+
+    return (tmp & RTC_AF);
+}