URL
https://opencores.org/ocsvn/open8_urisc/open8_urisc/trunk
Subversion Repositories open8_urisc
Compare Revisions
- This comparison shows the changes necessary to convert path
/
- from Rev 272 to Rev 273
- ↔ Reverse comparison
Rev 272 → Rev 273
/open8_urisc/trunk/VHDL/o8_epoch_timer_ii.vhd
34,23 → 34,23
-- 0x1 AAAAAAAA B1 of Buffered Setpoint (W) or Current Setpoint(R) |
-- 0x2 AAAAAAAA B2 of Buffered Setpoint (W) or Current Setpoint(R) |
-- 0x3 AAAAAAAA B3 of Buffered Setpoint (W) or Current Setpoint(R) |
-- 0x4 AAAAAAAA B0 of Current Epoch Time(RO) |
-- 0x5 AAAAAAAA B1 of Current Epoch Time(RO) |
-- 0x6 AAAAAAAA B2 of Current Epoch Time(RO) |
-- 0x7 AAAAAAAA B3 of Current Epoch Time(RO) |
-- 0x4 AAAAAAAA B0 of Buffered Current Epoch Time(RO) |
-- 0x5 AAAAAAAA B1 of Buffered Current Epoch Time(RO) |
-- 0x6 AAAAAAAA B2 of Buffered Current Epoch Time(RO) |
-- 0x7 AAAAAAAA B3 of Buffered Current Epoch Time(RO) |
-- Note that any write to 0x04,0x05, 0x06, or 0x07 will copy |
-- the current epoch time to a readable output buffer |
-- 0x8 xxxxxxxx (not used - returns 0x00) |
-- 0x9 xxxxxxxx (not used - returns 0x00) |
-- 0xA xxxxxxxx (not used - returns 0x00) |
-- 0xB xxxxxxxx (not used - returns 0x00) |
-- 0xC xxxxxxxx (not used - returns 0x00) |
-- 0xD xxxxxxxx (not used - returns 0x00) |
-- 0x8 -------- (not used - returns 0x00) |
-- 0x9 -------- (not used - returns 0x00) |
-- 0xA -------- (not used - returns 0x00) |
-- 0xB -------- (not used - returns 0x00) |
-- 0xC -------- (not used - returns 0x00) |
-- 0xD -------- (not used - returns 0x00) |
-- 0xE -------- Epoch Time Latch/Clear Control Register |
-- Any write to 0xE will clear/reset the all timer regs |
-- 0xF BA------ Status of buffer/alarm (1 = pending, 0 = current) |
-- A = Pending status (R) |
-- B = Alarm status (R) |
-- B = Buffer status (R) |
-- Note that any write will update the internal set point |
-- and clear the alarm |
-- |
61,6 → 61,7
-- change. |
-- Seth Henry 04/16/20 Modifiefd to make use of Open8 bus record |
-- Seth Henry 05/18/20 Added write qualification input |
-- Seth Henry 11/01/20 Updated comments regarding buffered current time |
|
library ieee; |
use ieee.std_logic_1164.all; |
/open8_urisc/trunk/VHDL/o8_sdlc_if.vhd
23,7 → 23,8
-- |
-- VHDL Units : o8_sdlc_if |
-- Description: Provides a full memory-mapped SDLC stack with automatic CRC16 |
-- Checksum insertion and integrity checking. |
-- Checksum insertion and integrity checking. Note that this |
-- entity ONLY provides packet framing and checksum calculation. |
-- |
-- Transmit Memory Map |
-- "0_0000_0000" (0x000) TX Buffer START |
65,6 → 66,7
------------------ -------- --------------------------------------------------- |
-- Seth Henry 04/16/20 Revision block added |
-- Seth Henry 05/18/20 Added write qualification input |
-- Seth Henry 11/01/20 Updated comments regarding SDLC support |
|
library ieee; |
use ieee.std_logic_1164.all; |
/open8_urisc/trunk/VHDL/o8_sys_timer.vhd
22,8 → 22,8
-- THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
-- |
-- VHDL Units : o8_sys_timer |
-- Description: Provides an 8-bit microsecond resolution timer for generating |
-- : periodic interrupts for the Open8 CPU. |
-- Description: Provides an 8-bit milli/microsecond resolution timer for |
-- : generating periodic interrupts for the Open8 CPU. |
-- |
-- |
-- Revision History |
35,6 → 35,7
-- interval write. |
-- Seth Henry 04/16/20 Modified to use Open8 bus record |
-- Seth Henry 05/18/20 Added write qualification input |
-- Seth Henry 11/01/20 Changed description to note different resolutions |
|
library ieee; |
use ieee.std_logic_1164.all; |