-- -- 8052 compatible microcontroller, with internal RAM & ROM
-- -- Version : 0300
-- -- Copyright (c) 2001-2002 Daniel Wallner (jesus@opencores.org)
-- -- (c) 2004-2005 Andreas Voggeneder (andreas.voggeneder@fh-hagenberg.at)
-- -- All rights reserved
-- -- Redistribution and use in source and synthezised forms, with or without
-- -- modification, are permitted provided that the following conditions are met:
-- -- Redistributions of source code must retain the above copyright notice,
-- -- this list of conditions and the following disclaimer.
-- -- Redistributions in synthesized form must reproduce the above copyright
-- -- notice, this list of conditions and the following disclaimer in the
-- -- documentation and/or other materials provided with the distribution.
-- -- Neither the name of the author nor the names of other contributors may
-- -- be used to endorse or promote products derived from this software without
-- -- specific prior written permission.
-- -- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
-- -- CONTRIBUTORS "AS IS"
-- -- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- -- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-- -- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
-- -- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-- -- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-- -- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-- -- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-- -- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- -- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- -- POSSIBILITY OF SUCH DAMAGE.
-- -- Please report bugs to the author, but before you do so, please
-- -- make sure that this is not a derivative work and that
-- -- you have the latest version of this file.
-- -- The latest version of this file can be found at:
-- -- http://www.opencores.org/cvsweb.shtml/t51/
-- -- Limitations :
-- -- File history :
library IEEE;
use IEEE.std_logic_1164.all;
use work.T51_Pack.all;
entity T8052 is
generic( tristate : integer := 0; --
ROMAddressWidth : integer := 13;
IRAMAddressWidth : integer := 8;
XRAMAddressWidth : integer := 11);
port( Clk : in std_logic;
Rst_n : in std_logic;
P0_in : in std_logic_vector(7 downto 0);
P1_in : in std_logic_vector(7 downto 0);
P2_in : in std_logic_vector(7 downto 0);
P3_in : in std_logic_vector(7 downto 0);
P0_out : out std_logic_vector(7 downto 0);
P1_out : out std_logic_vector(7 downto 0);
P2_out : out std_logic_vector(7 downto 0);
P3_out : out std_logic_vector(7 downto 0);
INT0 : in std_logic;
INT1 : in std_logic;
T0 : in std_logic;
T1 : in std_logic;
T2 : in std_logic;
T2EX : in std_logic;
RXD : in std_logic;
RXD_IsO : out std_logic;
RXD_O : out std_logic;
TXD : out std_logic; -- External XRAM Wishbone:
XRAM_WE_O : out std_logic;
XRAM_STB_O : out std_logic;
XRAM_CYC_O : out std_logic;
XRAM_ACK_I : in std_logic;
XRAM_DAT_O : out std_logic_vector(7 downto 0);
XRAM_ADR_O : out std_logic_vector(15 downto 0);
XRAM_DAT_I : in std_logic_vector(7 downto 0) );
end T8052;
architecture rtl of T8052 is
component ROM52
port(
Clk : in std_logic;
A : in std_logic_vector(ROMAddressWidth - 1 downto 0);
D : out std_logic_vector(7 downto 0) );
end component;
component SSRAM
generic
(
AddrWidth : integer := 16;
DataWidth : integer := 8 );
port(
Clk : in std_logic;
CE_n : in std_logic;
WE_n : in std_logic;
A : in std_logic_vector(AddrWidth - 1 downto 0);
DIn : in std_logic_vector(DataWidth - 1 downto 0);
DOut : out std_logic_vector(DataWidth - 1 downto 0) );
end component;
constant ext_mux_in_num : integer := 8; --63;
type ext_mux_din_type is array(0 to ext_mux_in_num-1) of std_logic_vector(7 downto 0);
subtype ext_mux_en_type is std_logic_vector(0 to ext_mux_in_num-1);
signal Ready : std_logic;
signal ROM_Addr : std_logic_vector(15 downto 0);
signal ROM_Data : std_logic_vector(7 downto 0);
signal RAM_Addr,RAM_Addr_r : std_logic_vector(15 downto 0);
signal XRAM_Addr : std_logic_vector(15 downto 0);
signal RAM_RData : std_logic_vector(7 downto 0);
signal RAM_DO : std_logic_vector(7 downto 0);
signal RAM_WData : std_logic_vector(7 downto 0);
signal RAM_Rd : std_logic;
signal RAM_Wr : std_logic;
signal RAM_WE_n : std_logic;
signal zeros : std_logic_vector(15 downto XRAMAddressWidth);
signal ram_access : std_logic;
signal mux_sel : std_logic;
signal mux_sel_r : std_logic;
signal ext_ram_en : std_logic;
signal int_xram_sel_n : std_logic;
signal IO_Rd : std_logic;
signal IO_Wr : std_logic;
signal IO_Addr : std_logic_vector(6 downto 0);
signal IO_Addr_r : std_logic_vector(6 downto 0);
signal IO_WData : std_logic_vector(7 downto 0);
signal IO_RData : std_logic_vector(7 downto 0);
signal IO_RData_arr : ext_mux_din_type;
signal IO_RData_en : ext_mux_en_type;
signal P0_Sel : std_logic;
signal P1_Sel : std_logic;
signal P2_Sel : std_logic;
signal P3_Sel : std_logic;
signal TMOD_Sel : std_logic;
signal TL0_Sel : std_logic;
signal TL1_Sel : std_logic;
signal TH0_Sel : std_logic;
signal TH1_Sel : std_logic;
signal T2CON_Sel : std_logic;
signal RCAP2L_Sel : std_logic;
signal RCAP2H_Sel : std_logic;
signal TL2_Sel : std_logic;
signal TH2_Sel : std_logic;
signal SCON_Sel : std_logic;
signal SBUF_Sel : std_logic;
signal P0_Wr : std_logic;
signal P1_Wr : std_logic;
signal P2_Wr : std_logic;
signal P3_Wr : std_logic;
signal TMOD_Wr : std_logic;
signal TL0_Wr : std_logic;
signal TL1_Wr : std_logic;
signal TH0_Wr : std_logic;
signal TH1_Wr : std_logic;
signal T2CON_Wr : std_logic;
signal RCAP2L_Wr : std_logic;
signal RCAP2H_Wr : std_logic;
signal TL2_Wr : std_logic;
signal TH2_Wr : std_logic;
signal SCON_Wr : std_logic;
signal SBUF_Wr : std_logic;
signal UseR2 : std_logic;
signal UseT2 : std_logic;
signal UART_Clk : std_logic;
signal R0 : std_logic;
signal R1 : std_logic;
signal SMOD : std_logic;
signal Int_Trig : std_logic_vector(6 downto 0);
signal Int_Acc : std_logic_vector(6 downto 0);
signal RI : std_logic;
signal TI : std_logic;
signal OF0 : std_logic;
signal OF1 : std_logic;
signal OF2 : std_logic;
begin
Ready <= '0'
when ( XRAM_ACK_I='0' and (ext_ram_en and ram_access)='1')
else '1';
XRAM_ADR_O <= XRAM_Addr(15 downto 0); -- Registered address
XRAM_DAT_O <= RAM_WData;
XRAM_CYC_O <= ext_ram_en and ram_access;
XRAM_STB_O <= ext_ram_en and ram_access;
XRAM_WE_O <= RAM_Wr;
process (Rst_n,clk)
begin
if Rst_n='0'
then IO_Addr_r <= (others =>'0');
RAM_Addr_r <= (others =>'0');
mux_sel_r <= '0';
elsif clk'event and clk = '1'
then IO_Addr_r <= IO_Addr;
if Ready = '1'
then RAM_Addr_r <= RAM_Addr;
end if; mux_sel_r <= mux_sel;
end if;
end process;
XRAM_Addr <= RAM_Addr_r;
rom : ROM52
port map
(
Clk => Clk,
A => ROM_Addr(ROMAddressWidth - 1 downto 0),
D => ROM_Data);
zeros <= (others => '0');
g_rams0 : if XRAMAddressWidth > 15
generate ext_ram_en <= '0'; -- no external XRAM end
generate;
g_rams1 : if XRAMAddressWidth < 16 and XRAMAddressWidth > 0
generate ext_ram_en <= '1'
when XRAM_Addr(15 downto XRAMAddressWidth) /= zeros else '0';
end generate;
ram_access <= '1'
when (RAM_Rd or RAM_Wr)='1'
else '0'; -- xram bus access is pipelined. -- so use registered signal for selecting read data
RAM_RData <= RAM_DO when mux_sel_r = '0'
else XRAM_DAT_I; -- select data mux
mux_sel <= ext_ram_en; -- internal XRAM select signal is active low.
-- so internal xram is selected when external XRAM is not selected (ext_ram_en = '0') int_xram_sel_n <= ext_ram_en;
RAM_WE_n <= not RAM_Wr;
g_ram : if XRAMAddressWidth > 0
generate ram : SSRAM
generic map( AddrWidth => XRAMAddressWidth)
port map
(
Clk => Clk,
CE_n => int_xram_sel_n,
WE_n => RAM_WE_n,
A => XRAM_Addr(XRAMAddressWidth - 1 downto 0),
DIn => RAM_WData,
DOut => RAM_DO);
end generate;
core51 : T51
generic map(
DualBus => 1,
tristate => tristate,
t8032 => 0,
RAMAddressWidth => IRAMAddressWidth)
port map
(
Clk => Clk,
Rst_n => Rst_n,
Ready => Ready,
ROM_Addr => ROM_Addr,
ROM_Data => ROM_Data,
RAM_Addr => RAM_Addr,
RAM_RData => RAM_RData,
RAM_WData => RAM_WData,
RAM_Rd => RAM_Rd,
RAM_Wr => RAM_Wr,
Int_Trig => Int_Trig,
Int_Acc => Int_Acc,
SFR_Rd_RMW => IO_Rd,
SFR_Wr => IO_Wr,
SFR_Addr => IO_Addr,
SFR_WData => IO_WData,
SFR_RData_in => IO_RData);
glue51 : T51_Glue
generic map( tristate => tristate)
port map
(
Clk => Clk,
Rst_n => Rst_n,
INT0 => INT0,
INT1 => INT1,
RI => RI,
TI => TI,
OF0 => OF0,
OF1 => OF1,
OF2 => OF2,
IO_Wr => IO_Wr,
IO_Addr => IO_Addr,
IO_Addr_r => IO_Addr_r,
IO_WData => IO_WData,
IO_RData => IO_RData_arr(0),
Selected => IO_RData_en(0),
Int_Acc => Int_Acc,
R0 => R0,
R1 => R1,
SMOD => SMOD,
P0_Sel => P0_Sel,
P1_Sel => P1_Sel,
P2_Sel => P2_Sel,
P3_Sel => P3_Sel,
TMOD_Sel => TMOD_Sel,
TL0_Sel => TL0_Sel,
TL1_Sel => TL1_Sel,
TH0_Sel => TH0_Sel,
TH1_Sel => TH1_Sel,
T2CON_Sel => T2CON_Sel,
RCAP2L_Sel => RCAP2L_Sel,
RCAP2H_Sel => RCAP2H_Sel,
TL2_Sel => TL2_Sel,
TH2_Sel => TH2_Sel,
SCON_Sel => SCON_Sel,
SBUF_Sel => SBUF_Sel,
P0_Wr => P0_Wr,
P1_Wr => P1_Wr,
P2_Wr => P2_Wr,
P3_Wr => P3_Wr,
TMOD_Wr => TMOD_Wr,
TL0_Wr => TL0_Wr,
TL1_Wr => TL1_Wr,
TH0_Wr => TH0_Wr,
TH1_Wr => TH1_Wr,
T2CON_Wr => T2CON_Wr,
RCAP2L_Wr => RCAP2L_Wr,
RCAP2H_Wr => RCAP2H_Wr,
TL2_Wr => TL2_Wr,
TH2_Wr => TH2_Wr,
SCON_Wr => SCON_Wr,
SBUF_Wr => SBUF_Wr,
Int_Trig => Int_Trig);
tp0 : T51_Port
generic map( tristate => tristate)
port map
(
Clk => Clk,
Rst_n => Rst_n,
Sel => P0_Sel,
Rd_RMW => IO_Rd,
Wr => P0_Wr,
Data_In => IO_WData,
Data_Out => IO_RData_arr(1),
IOPort_in => P0_in,
IOPort_out => P0_out);
IO_RData_en(1) <= P0_Sel;
tp1 : T51_Port
generic map( tristate => tristate)
port map
(
Clk => Clk,
Rst_n => Rst_n,
Sel => P1_Sel,
Rd_RMW => IO_Rd,
Wr => P1_Wr,
Data_In => IO_WData,
Data_Out => IO_RData_arr(2),
IOPort_in => P1_in,
IOPort_out => P1_out);
IO_RData_en(2) <= P1_Sel;
tp2 : T51_Port
generic map( tristate => tristate)
port map
(
Clk => Clk,
Rst_n => Rst_n,
Sel => P2_Sel,
Rd_RMW => IO_Rd,
Wr => P2_Wr,
Data_In => IO_WData,
Data_Out => IO_RData_arr(3),
IOPort_in => P2_in,
IOPort_out => P2_out);
IO_RData_en(3) <= P2_Sel;
tp3 : T51_Port
generic map( tristate => tristate)
port map
(
Clk => Clk,
Rst_n => Rst_n,
Sel => P3_Sel,
Rd_RMW => IO_Rd,
Wr => P3_Wr,
Data_In => IO_WData,
Data_Out => IO_RData_arr(4),
IOPort_in => P3_in,
IOPort_out => P3_out);
IO_RData_en(4) <= P3_Sel;
tc01 : T51_TC01
generic map( FastCount => 0, tristate => tristate)
port map
(
Clk => Clk,
Rst_n => Rst_n,
T0 => T0,
T1 => T1,
INT0 => INT0,
INT1 => INT1,
M_Sel => TMOD_Sel,
H0_Sel => TH0_Sel,
L0_Sel => TL0_Sel,
H1_Sel => TH1_Sel,
L1_Sel => TL1_Sel,
R0 => R0,
R1 => R1,
M_Wr => TMOD_Wr,
H0_Wr => TH0_Wr,
L0_Wr => TL0_Wr,
H1_Wr => TH1_Wr,
L1_Wr => TL1_Wr,
Data_In => IO_WData,
Data_Out => IO_RData_arr(5),
OF0 => OF0, OF1 => OF1);
IO_RData_en(5) <= TMOD_Sel or TH0_Sel or TL0_Sel or TH1_Sel or TL1_Sel;
tc2 : T51_TC2
generic map( FastCount => 0, tristate => tristate)
port map(
Clk => Clk,
Rst_n => Rst_n,
T2 => T2,
T2EX => T2EX,
C_Sel => T2CON_Sel,
CH_Sel => RCAP2H_Sel,
CL_Sel => RCAP2L_Sel,
H_Sel => TH2_Sel,
L_Sel => TL2_Sel,
C_Wr => T2CON_Wr,
CH_Wr => RCAP2H_Wr,
CL_Wr => RCAP2L_Wr,
H_Wr => TH2_Wr,
L_Wr => TL2_Wr,
Data_In => IO_WData,
Data_Out => IO_RData_arr(6),
UseR2 => UseR2,
UseT2 => UseT2,
UART_Clk => UART_Clk,
F => OF2);
IO_RData_en(6) <= T2CON_Sel or RCAP2H_Sel or RCAP2L_Sel or TH2_Sel or TL2_Sel;
uart : T51_UART
generic map( FastCount => 0, tristate => tristate)
port map
(
Clk => Clk,
Rst_n => Rst_n,
UseR2 => UseR2,
UseT2 => UseT2,
BaudC2 => UART_Clk,
BaudC1 => OF1,
SC_Sel => SCON_Sel,
SB_Sel => SBUF_Sel,
SC_Wr => SCON_Wr,
SB_Wr => SBUF_Wr,
SMOD => SMOD,
Data_In => IO_WData,
Data_Out => IO_RData_arr(7),
RXD => RXD,
RXD_IsO => RXD_IsO,
RXD_O => RXD_O,
TXD => TXD,
RI => RI,
TI => TI);
IO_RData_en(7) <= SCON_Sel or SBUF_Sel;
tristate_mux:
if tristate/=0
generate drive: for i in 0 to ext_mux_in_num-1;
generate IO_RData <= IO_RData_arr(i);
end generate;
end generate;
std_mux: if tristate=0
generate process(IO_RData_en,IO_RData_arr)
begin IO_RData <= IO_RData_arr(0);
for i in 1 to ext_mux_in_num-1 loop
if IO_RData_en(i)='1'
then IO_RData <= IO_RData_arr(i);
end if;
end loop;
end process;
end generate;
end;
8051_Microcontrollers_Hardware_Manual_.pdf
