| Line 7... |
Line 7... |
-- : tick for external use.
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-- : tick for external use.
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--
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--
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-- Register Map:
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-- Register Map:
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-- Offset Bitfield Description Read/Write
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-- Offset Bitfield Description Read/Write
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-- 0x0 AAAAAAAA Periodic Interval Timer in uS (RW)
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-- 0x0 AAAAAAAA Periodic Interval Timer in uS (RW)
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-- 0x1 -AAAAAAA Tenths (0x00 - 0x63) (RW)
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-- 0x1 -AAAAAAA Tenths (0x00 - 0x99) (RW)
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-- 0x2 --AAAAAA Seconds (0x00 - 0x3B) (RW)
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-- 0x2 --AAAAAA Seconds (0x00 - 0x59) (RW)
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-- 0x3 --AAAAAA Minutes (0x00 - 0x3B) (RW)
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-- 0x3 --AAAAAA Minutes (0x00 - 0x59) (RW)
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-- 0x4 ---AAAAA Hours (0x00 - 0x17) (RW)
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-- 0x4 ---AAAAA Hours (0x00 - 0x23) (RW)
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-- 0x5 -----AAA Day of Week (0x00 - 0x06) (RW)
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-- 0x5 -----AAA Day of Week (0x00 - 0x06) (RW)
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-- 0x6 -------- Update RTC regs from Shadow Regs (WO)
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-- 0x6 -------- Update RTC regs from Shadow Regs (WO)
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-- 0x7 A------- Update Shadow Regs from RTC regs (RW)
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-- 0x7 A------- Update Shadow Regs from RTC regs (RW)
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-- A = Update is Busy
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-- A = Update is Busy
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--
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-- Note that values are stored in packed BCD, not hex
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library ieee;
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_unsigned.all;
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use ieee.std_logic_unsigned.all;
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use ieee.std_logic_arith.all;
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use ieee.std_logic_arith.all;
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| Line 207... |
Line 210... |
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uSec_Cntr <= uSec_Cntr - 1;
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uSec_Cntr <= uSec_Cntr - 1;
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uSec_Tick_i <= '0';
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uSec_Tick_i <= '0';
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if( uSec_Cntr = 0 )then
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if( uSec_Cntr = 0 )then
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uSec_Cntr <= DLY_1USEC;
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uSec_Cntr <= DLY_1USEC;
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uSec_Tick_i <= or_reduce(Interval);
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uSec_Tick_i <= '1';
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end if;
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end if;
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pit.timer_ro <= '0';
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pit.timer_ro <= '0';
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rtc.frac_ro <= '0';
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rtc.frac_ro <= '0';
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