From 34288fea43407fcf4ff530dea89030d656055804 Mon Sep 17 00:00:00 2001
From: Barry Wardell <rockbox@barrywardell.net>
Date: Wed, 14 Nov 2007 16:53:31 +0000
Subject: FS#8157: H10 RTC alarm with some changes by me. The settings keymap
 had to be changed slightly, but it seems to work better for all setting
 screens with the new keymap. Thanks to

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15620 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/drivers/rtc/rtc_e8564.c | 138 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 133 insertions(+), 5 deletions(-)

(limited to 'firmware/drivers/rtc/rtc_e8564.c')

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);
+}
-- 
cgit v1.2.3