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/*
 * Real Time Clock (Harris ICM7170) for RTEMS
 *
 *  This part is found on the second generation of this board.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id: tod.c,v 1.2 2001-09-27 12:01:04 chris Exp $
 */
 
#include <rtems.h>
#include <tod.h>
#include <bsp.h>
 
/*
 * These values are programed into a register and must not be changed.
 */
 
#define ICM1770_CRYSTAL_FREQ_32K      0x00
#define ICM1770_CRYSTAL_FREQ_1M       0x01
#define ICM1770_CRYSTAL_FREQ_2M       0x02
#define ICM1770_CRYSTAL_FREQ_4M       0x03
 
void ICM7170_GetTOD(
  volatile unsigned char *imc1770_regs,
  rtems_unsigned8        icm1770_freq,
  rtems_time_of_day      *rtc_tod
);
void ICM7170_SetTOD(
  volatile unsigned char *imc1770_regs,
  rtems_unsigned8        icm1770_freq,
  rtems_time_of_day      *rtc_tod
);
 
/*
 *  This code is dependent on the Vista 603e's use of the ICM7170 RTC/NVRAM
 *  and should remain in this file.
 */
 
void setRealTimeToRTEMS()
{
  rtems_time_of_day rtc_tod;
 
  ICM7170_GetTOD( SCORE603E_RTC_ADDRESS, SCORE_RTC_FREQUENCY, &rtc_tod );
  rtems_clock_set( &rtc_tod );
}
 
void setRealTimeFromRTEMS()
{
  rtems_time_of_day rtems_tod;
 
  rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod );
  ICM7170_SetTOD( SCORE603E_RTC_ADDRESS, SCORE_RTC_FREQUENCY, &rtems_tod );
}
 
int checkRealTime()
{
  rtems_time_of_day rtems_tod;
  rtems_time_of_day rtc_tod;
 
  ICM7170_GetTOD( SCORE603E_RTC_ADDRESS, SCORE_RTC_FREQUENCY, &rtc_tod );
  rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod );
 
  if( rtems_tod.year == rtc_tod.year &&
      rtems_tod.month == rtc_tod.month &&
      rtems_tod.day == rtc_tod.day ) {
     return ((rtems_tod.hour   - rtc_tod.hour) * 3600) +
            ((rtems_tod.minute - rtc_tod.minute) * 60) +
             (rtems_tod.second - rtc_tod.second);
  }
  return 9999;
}
 
/*
 *  These routines are ICM7170 should be in
 *  a separate support library.
 * XXX Make static
 */
static int ICM7170_GetField(
  volatile unsigned char *imc1770_regs,
  int                     reg
)
{
  unsigned char x;
 
  x = imc1770_regs[reg*4];
 
  return x;
}
 
static void ICM7170_SetField(
  volatile unsigned char *imc1770_regs,
  int                     reg,
  unsigned char             d
)
{
  imc1770_regs[reg*4] = d;
}
 
void ICM7170_GetTOD(
  volatile unsigned char *imc1770_regs,
  rtems_unsigned8        icm1770_freq,
  rtems_time_of_day      *rtc_tod
)
{
  int year;
  int usec;
  static rtems_boolean init = TRUE;
 
  /* Initialize the clock at once prior to reading */
  if (init ) {
    ICM7170_SetField( imc1770_regs,  0x11, (0x0c | icm1770_freq) );
    init = FALSE;
  }
 
  /* Latch times */
  /* rtc_tod->ticks  = */
 
  usec = ICM7170_GetField( imc1770_regs, 0x00 );
 
  year = ICM7170_GetField( imc1770_regs, 0x06 );
  if ( year >= 88 )
    year += 1900;
  else
    year += 2000;
 
  rtc_tod->year   = year;
  rtc_tod->month  = ICM7170_GetField( imc1770_regs, 0x04 );
  rtc_tod->day    = ICM7170_GetField( imc1770_regs, 0x05 );
  rtc_tod->hour   = ICM7170_GetField( imc1770_regs, 0x01 );
  rtc_tod->minute = ICM7170_GetField( imc1770_regs, 0x02 );
  rtc_tod->second = ICM7170_GetField( imc1770_regs, 0x03 );
  rtc_tod->ticks  = ICM7170_GetField( imc1770_regs, 0x00 );
}
 
void ICM7170_SetTOD(
  volatile unsigned char *imc1770_regs,
  rtems_unsigned8        icm1770_freq,
  rtems_time_of_day      *rtc_tod
)
{
  int year;
 
  year = rtc_tod->year;
  if ( year >= 2088 )        /* plan ahead :) */
    rtems_fatal_error_occurred( 0xBAD0BAD0 );
 
  if ( year >= 2000 )
    year -= 2000;
  else
    year -= 1900;
 
  ICM7170_SetField( imc1770_regs, 0x11, (0x04 |icm1770_freq ) );
 
  ICM7170_SetField( imc1770_regs, 0x06, year );
  ICM7170_SetField( imc1770_regs, 0x04, rtc_tod->month );
  ICM7170_SetField( imc1770_regs, 0x05, rtc_tod->day );
  ICM7170_SetField( imc1770_regs, 0x01, rtc_tod->hour );
  ICM7170_SetField( imc1770_regs, 0x02, rtc_tod->minute );
  ICM7170_SetField( imc1770_regs, 0x03, rtc_tod->second );
 
  /*
   * I don't know which day of week is
   *
   */
  ICM7170_SetField( imc1770_regs, 0x07, 1 );
 
  ICM7170_SetField( imc1770_regs,  0x11, (0x0c | icm1770_freq) );
}
 
 
 
 
 
 
 
 

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`* Real Time Clock (Harris ICM7170) for RTEMS`
3			`*`
4			`* This part is found on the second generation of this board.`
5			`*`
6			`* The license and distribution terms for this file may be`
7			`* found in the file LICENSE in this distribution or at`
8			`* http://www.OARcorp.com/rtems/license.html.`
9			`*`
10			`* $Id: tod.c,v 1.2 2001-09-27 12:01:04 chris Exp $`
11			`*/`
12
13			`#include <rtems.h>`
14			`#include <tod.h>`
15			`#include <bsp.h>`
16
17			`/*`
18			`* These values are programed into a register and must not be changed.`
19			`*/`
20
21			`#define ICM1770_CRYSTAL_FREQ_32K 0x00`
22			`#define ICM1770_CRYSTAL_FREQ_1M 0x01`
23			`#define ICM1770_CRYSTAL_FREQ_2M 0x02`
24			`#define ICM1770_CRYSTAL_FREQ_4M 0x03`
25
26			`void ICM7170_GetTOD(`
27			`volatile unsigned char *imc1770_regs,`
28			`rtems_unsigned8 icm1770_freq,`
29			`rtems_time_of_day *rtc_tod`
30			`);`
31			`void ICM7170_SetTOD(`
32			`volatile unsigned char *imc1770_regs,`
33			`rtems_unsigned8 icm1770_freq,`
34			`rtems_time_of_day *rtc_tod`
35			`);`
36
37			`/*`
38			`* This code is dependent on the Vista 603e's use of the ICM7170 RTC/NVRAM`
39			`* and should remain in this file.`
40			`*/`
41
42			`void setRealTimeToRTEMS()`
43			`{`
44			`rtems_time_of_day rtc_tod;`
45
46			`ICM7170_GetTOD( SCORE603E_RTC_ADDRESS, SCORE_RTC_FREQUENCY, &rtc_tod );`
47			`rtems_clock_set( &rtc_tod );`
48			`}`
49
50			`void setRealTimeFromRTEMS()`
51			`{`
52			`rtems_time_of_day rtems_tod;`
53
54			`rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod );`
55			`ICM7170_SetTOD( SCORE603E_RTC_ADDRESS, SCORE_RTC_FREQUENCY, &rtems_tod );`
56			`}`
57
58			`int checkRealTime()`
59			`{`
60			`rtems_time_of_day rtems_tod;`
61			`rtems_time_of_day rtc_tod;`
62
63			`ICM7170_GetTOD( SCORE603E_RTC_ADDRESS, SCORE_RTC_FREQUENCY, &rtc_tod );`
64			`rtems_clock_get( RTEMS_CLOCK_GET_TOD, &rtems_tod );`
65
66			`if( rtems_tod.year == rtc_tod.year &&`
67			`rtems_tod.month == rtc_tod.month &&`
68			`rtems_tod.day == rtc_tod.day ) {`
69			`return ((rtems_tod.hour - rtc_tod.hour) * 3600) +`
70			`((rtems_tod.minute - rtc_tod.minute) * 60) +`
71			`(rtems_tod.second - rtc_tod.second);`
72			`}`
73			`return 9999;`
74			`}`
75
76			`/*`
77			`* These routines are ICM7170 should be in`
78			`* a separate support library.`
79			`* XXX Make static`
80			`*/`
81			`static int ICM7170_GetField(`
82			`volatile unsigned char *imc1770_regs,`
83			`int reg`
84			`)`
85			`{`
86			`unsigned char x;`
87
88			`x = imc1770_regs[reg*4];`
89
90			`return x;`
91			`}`
92
93			`static void ICM7170_SetField(`
94			`volatile unsigned char *imc1770_regs,`
95			`int reg,`
96			`unsigned char d`
97			`)`
98			`{`
99			`imc1770_regs[reg*4] = d;`
100			`}`
101
102			`void ICM7170_GetTOD(`
103			`volatile unsigned char *imc1770_regs,`
104			`rtems_unsigned8 icm1770_freq,`
105			`rtems_time_of_day *rtc_tod`
106			`)`
107			`{`
108			`int year;`
109			`int usec;`
110			`static rtems_boolean init = TRUE;`
111
112			`/* Initialize the clock at once prior to reading */`
113			`if (init ) {`
114			`ICM7170_SetField( imc1770_regs, 0x11, (0x0c \| icm1770_freq) );`
115			`init = FALSE;`
116			`}`
117
118			`/* Latch times */`
119			`/* rtc_tod->ticks = */`
120
121			`usec = ICM7170_GetField( imc1770_regs, 0x00 );`
122
123			`year = ICM7170_GetField( imc1770_regs, 0x06 );`
124			`if ( year >= 88 )`
125			`year += 1900;`
126			`else`
127			`year += 2000;`
128
129			`rtc_tod->year = year;`
130			`rtc_tod->month = ICM7170_GetField( imc1770_regs, 0x04 );`
131			`rtc_tod->day = ICM7170_GetField( imc1770_regs, 0x05 );`
132			`rtc_tod->hour = ICM7170_GetField( imc1770_regs, 0x01 );`
133			`rtc_tod->minute = ICM7170_GetField( imc1770_regs, 0x02 );`
134			`rtc_tod->second = ICM7170_GetField( imc1770_regs, 0x03 );`
135			`rtc_tod->ticks = ICM7170_GetField( imc1770_regs, 0x00 );`
136			`}`
137
138			`void ICM7170_SetTOD(`
139			`volatile unsigned char *imc1770_regs,`
140			`rtems_unsigned8 icm1770_freq,`
141			`rtems_time_of_day *rtc_tod`
142			`)`
143			`{`
144			`int year;`
145
146			`year = rtc_tod->year;`
147			`if ( year >= 2088 ) /* plan ahead :) */`
148			`rtems_fatal_error_occurred( 0xBAD0BAD0 );`
149
150			`if ( year >= 2000 )`
151			`year -= 2000;`
152			`else`
153			`year -= 1900;`
154
155			`ICM7170_SetField( imc1770_regs, 0x11, (0x04 \|icm1770_freq ) );`
156
157			`ICM7170_SetField( imc1770_regs, 0x06, year );`
158			`ICM7170_SetField( imc1770_regs, 0x04, rtc_tod->month );`
159			`ICM7170_SetField( imc1770_regs, 0x05, rtc_tod->day );`
160			`ICM7170_SetField( imc1770_regs, 0x01, rtc_tod->hour );`
161			`ICM7170_SetField( imc1770_regs, 0x02, rtc_tod->minute );`
162			`ICM7170_SetField( imc1770_regs, 0x03, rtc_tod->second );`
163
164			`/*`
165			`* I don't know which day of week is`
166			`*`
167			`*/`
168			`ICM7170_SetField( imc1770_regs, 0x07, 1 );`
169
170			`ICM7170_SetField( imc1770_regs, 0x11, (0x0c \| icm1770_freq) );`
171			`}`
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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [powerpc/] [score603e/] [tod/] [tod.c] - Blame information for rev 173