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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Manuel,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>Note that -1 is added in ERC32_MEC.Real_Time_Clock_Scalar.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'>#define Clock_driver_support_initialize_hardware()
\<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> do { \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> /* approximately
1 us per countdown */ \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ERC32_MEC.Real_Time_Clock_Scalar
= CLOCK_SPEED - 1; \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ERC32_MEC.Real_Time_Clock_Counter
= \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> BSP_Configuration.microseconds_per_tick;
\<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ERC32_MEC_Set_Real_Time_Clock_Timer_Control(
\<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ERC32_MEC_TIMER_COUNTER_ENABLE_COUNTING
| \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ERC32_MEC_TIMER_COUNTER_LOAD_SCALER
| \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ERC32_MEC_TIMER_COUNTER_LOAD_COUNTER
\<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ); \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ERC32_MEC_Set_Real_Time_Clock_Timer_Control(
\<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ERC32_MEC_TIMER_COUNTER_ENABLE_COUNTING
| \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> ERC32_MEC_TIMER_COUNTER_RELOAD_AT_ZERO
\<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span lang=EN-US
style='font-size:10.0pt;font-family:"Courier New";color:navy'> </span></font><font
size=2 color=navy face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:navy'>); \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:navy'> } while (0)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'>I don’t think it is
a bug. How do you do the verification?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Att.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Wendell.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> <o:p></o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>De:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
rtems-users-bounces@rtems.org [mailto:rtems-users-bounces@rtems.org] <b><span
style='font-weight:bold'>Em nome de </span></b>Manuel<br>
<b><span style='font-weight:bold'>Enviada em:</span></b> sexta-feira, 6 de
março de 2009 12:30<br>
<b><span style='font-weight:bold'>Para:</span></b> rtems-users@rtems.com<br>
<b><span style='font-weight:bold'>Assunto:</span></b> ERC32 clock counter
incorrect</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Hi<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>We have discovered a bug in the ERC32 clock driver
(at least for the RTEMS 4.8.0 version).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Currently, the RTC counter is being initialized with
(on the ckinit.c file)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>ERC32_MEC.Real_Time_Clock_Counter = \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>
BSP_Configuration.microseconds_per_tick;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>This way it is adding an extra microsecond for each
clock tick.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>The correct set value should be<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>ERC32_MEC.Real_Time_Clock_Counter = \<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>
BSP_Configuration.microseconds_per_tick - 1;<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>the other SPARC BSPs (leon2 and leon3) clocks seam ok
:)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Kind regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Manuel Coutinho<o:p></o:p></span></font></p>
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