Reworking of Archos RTC code to create a (slightly) more abstract RTC api

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8216 a1c6a512-1295-4272-9138-f99709370657

firmware/common/timefuncs.c

@@ -47,21 +47,18 @@ struct tm *get_time(void)
 {
 #ifndef SIMULATOR
 #ifdef CONFIG_RTC
-    char rtcbuf[8];
+    char rtcbuf[7];
 
-    /* We don't need the first byte, but we want the indexes in the
-       buffer to match the data sheet */
-    rtc_read_multiple(1, &rtcbuf[1], 7);
+    rtc_read_datetime(rtcbuf);
+
+    tm.tm_sec = ((rtcbuf[0] & 0x70) >> 4) * 10 + (rtcbuf[0] & 0x0f);
+    tm.tm_min = ((rtcbuf[1] & 0x70) >> 4) * 10 + (rtcbuf[1] & 0x0f);
+    tm.tm_hour = ((rtcbuf[2] & 0x30) >> 4) * 10 + (rtcbuf[2] & 0x0f);
+    tm.tm_wday = rtcbuf[3] & 0x07;
+    tm.tm_mday = ((rtcbuf[4] & 0x30) >> 4) * 10 + (rtcbuf[4] & 0x0f);
+    tm.tm_mon = ((rtcbuf[5] & 0x10) >> 4) * 10 + (rtcbuf[5] & 0x0f) - 1;
+    tm.tm_year = ((rtcbuf[6] & 0xf0) >> 4) * 10 + (rtcbuf[6] & 0x0f) + 100;
 
-    tm.tm_sec = ((rtcbuf[1] & 0x70) >> 4) * 10 + (rtcbuf[1] & 0x0f);
-    tm.tm_min = ((rtcbuf[2] & 0x70) >> 4) * 10 + (rtcbuf[2] & 0x0f);
-    tm.tm_hour = ((rtcbuf[3] & 0x30) >> 4) * 10 + (rtcbuf[3] & 0x0f);
-    tm.tm_mday = ((rtcbuf[5] & 0x30) >> 4) * 10 + (rtcbuf[5] & 0x0f);
-    tm.tm_mon = ((rtcbuf[6] & 0x10) >> 4) * 10 + (rtcbuf[6] & 0x0f) - 1;
-    tm.tm_year = ((rtcbuf[7] & 0xf0) >> 4) * 10 + (rtcbuf[7] & 0x0f) + 100;
-    tm.tm_wday = rtcbuf[4] & 0x07;
-    if(tm.tm_wday == 7)
-        tm.tm_wday = 0;
     tm.tm_yday = 0; /* Not implemented for now */
     tm.tm_isdst = -1; /* Not implemented for now */
 #else
@@ -86,22 +83,19 @@ int set_time(const struct tm *tm)
 {
 #ifdef CONFIG_RTC
     int rc;
-    int tmp;
+    char rtcbuf[7];
     
     if (valid_time(tm))
     {
-        rc = rtc_write(1, ((tm->tm_sec/10) << 4) | (tm->tm_sec%10));
-        rc |= rtc_write(2, ((tm->tm_min/10) << 4) | (tm->tm_min%10));
-        rc |= rtc_write(3, ((tm->tm_hour/10) << 4) | (tm->tm_hour%10));
-        tmp = tm->tm_wday;
-        if(tmp == 0)
-            tmp = 7;
-        rc |= rtc_write(4, tmp);
-        rc |= rtc_write(5, ((tm->tm_mday/10) << 4) | (tm->tm_mday%10));
-        rc |= rtc_write(6, (((tm->tm_mon+1)/10) << 4) | ((tm->tm_mon+1)%10));
-        rc |= rtc_write(7, (((tm->tm_year-100)/10) << 4) | ((tm->tm_year-100)%10));
+        rtcbuf[0]=((tm->tm_sec/10) << 4) | (tm->tm_sec%10);
+        rtcbuf[1]=((tm->tm_min/10) << 4) | (tm->tm_min%10);
+        rtcbuf[2]=((tm->tm_hour/10) << 4) | (tm->tm_hour%10);
+        rtcbuf[3]=tm->tm_wday;
+        rtcbuf[4]=((tm->tm_mday/10) << 4) | (tm->tm_mday%10);
+        rtcbuf[5]=(((tm->tm_mon+1)/10) << 4) | ((tm->tm_mon+1)%10);
+        rtcbuf[6]=(((tm->tm_year-100)/10) << 4) | ((tm->tm_year-100)%10);
 
-        rc |= rtc_write(8, 0x80); /* Out=1, calibration = 0 */
+        rc = rtc_write_datetime(rtcbuf);
 
         if(rc)
             return -1;

firmware/drivers/rtc.c

@@ -249,4 +249,34 @@ int rtc_read_multiple(unsigned char address, unsigned char *buf, int numbytes)
     i2c_end();
     return ret;
 }
-#endif
+
+int rtc_read_datetime(unsigned char* buf) {
+    int rc;
+
+    rc = rtc_read_multiple(1, buf, 7);
+
+    /* Adjust weekday */
+    if(buf[3] == 7)
+        buf[3]=0;
+
+    return rc;
+}
+
+int rtc_write_datetime(unsigned char* buf) {
+    int i;
+    int rc = 0;
+    
+    /* Adjust weekday */
+    if(buf[3] == 0)
+        buf[3] = 7;
+
+    for (i = 0; i < 7 ; i++)
+    {
+        rc |= rtc_write(i+1, buf[i]);
+    }
+    rc |= rtc_write(8, 0x80); /* Out=1, calibration = 0 */
+
+    return rc;
+}
+
+#endif /* CONFIG_RTC */

firmware/export/rtc.h

@@ -22,7 +22,16 @@
 #include <stdbool.h> 
 
 #ifdef CONFIG_RTC
+
+/* Common functions for all targets */
 void rtc_init(void);
+int rtc_read_datetime(unsigned char* buf);
+int rtc_write_datetime(unsigned char* buf);
+
+#if CONFIG_RTC == RTC_M41ST84W
+
+/* The RTC in the Archos devices is used for much more than just the clock 
+   data */
 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);
@@ -35,6 +44,8 @@ bool rtc_check_alarm_started(bool release_alarm);
 bool rtc_check_alarm_flag(void);
 #endif /* HAVE_ALARM_MOD */
 
+#endif /* RTC_M41ST84W */
+
 #endif /* CONFIG_RTC */
 
 #endif