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- added global clock generator

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git-svn-id: http://moon:8086/svn/vhdl/trunk@608 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2009-11-05 12:02:10 +00:00
parent 85779bda74
commit 4a1eafc312
3 changed files with 41 additions and 73 deletions
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projects/mips_sys/src/mips_sys.vhd
+19 -32
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@@ -319,14 +319,13 @@ ARCHITECTURE behavior OF mips_sys IS
signal sdram_clk270 : std_logic;
signal sdram_clk270var : std_logic;
signal vga_clk : std_logic;
signal vga_clk_lock : std_logic;
signal dcm_lock : std_logic;
signal rst_in : std_logic;
signal int_timer : std_logic;
signal int_uart0 : std_logic;
signal int_uart1 : std_logic;
signal uart1_tx : std_logic;
signal uart1_rx : std_logic;
signal sdram_clk_lock : std_logic;
signal usb_addr : unsigned(31 downto 0);
signal ac97_rstn : std_logic;
signal mem_mapped_io : std_logic;
@@ -471,8 +470,7 @@ BEGIN
sys_flash_a <= '0' & flash_addr(24 downto 2) & '0';
flash_page_mode_en <= not mem_mapped_io;
CLK_O <= sys_clk_in;
RST_O <= not (sdram_clk_lock and vga_clk_lock);
RST_O <= not dcm_lock;
SDAT_I_sdram <= MDAT_O & MDAT_O;
SEL_I_sdram <= "0000" & SEL_O;
@@ -811,22 +809,25 @@ inst_uart_wb_1 : uart_wb
inst_clockgen : entity work.clockgen
GENERIC MAP
(
clk_in_freq_hz => 100E6,
clk0_out_phaseshift => 0,
clk1_out_phaseshift => 0
clk_in_freq_hz => 100E6,
vga_clk_out_freq_hz => tsvga.f_pxl_clk,
sdr_clk0_out_phaseshift => 0,
sdr_clk1_out_phaseshift => 0
)
PORT MAP
(
-- Clocks and Reset
rst => rst_in, -- external async reset, low active
clk_in => CLK_O, -- system clock (e.g. 100MHz), from board
clk_fb_in => sys_sdr_clk_fb, -- feedback clock
clk0_0_out => sdram_clk0, -- System clock #0, dcm#0 output 0°
clk0_270_out => sdram_clk270, -- System clock #0, dcm#0 output 270°
clk1_0_out => open, -- System clock #1 (e.g. clock for DDR-SDRAM data capture), dcm#1 output 0°
clk1_270_out => sdram_clk270var, -- System clock #1 (e.g. clock for DDR-SDRAM data capture), dcm#1 output 270°
locked_out => sdram_clk_lock, -- DCM locked status
error_out => open
rst => rst_in, -- external async reset, low active
clk_in => sys_clk_in, -- system clock (e.g. 100MHz), from board
sys_clk_out => CLK_O,
vga_clk_out => vga_clk,
sdr_clk0_fb_in => sys_sdr_clk_fb, -- feedback clock
sdr_clk0_0_out => sdram_clk0, -- System clock #0, dcm#0 output 0°
sdr_clk0_270_out => sdram_clk270, -- System clock #0, dcm#0 output 270°
sdr_clk1_0_out => open, -- System clock #1 (e.g. clock for DDR-SDRAM data capture), dcm#1 output 0°
sdr_clk1_270_out => sdram_clk270var, -- System clock #1 (e.g. clock for DDR-SDRAM data capture), dcm#1 output 270°
locked_out => dcm_lock, -- DCM locked status
error_out => open
);
inst_sdram_ctrl_frontend_wb : entity work.sdram_ctrl_frontend64_wb
@@ -872,25 +873,11 @@ inst_sdram_ctrl_frontend_wb : entity work.sdram_ctrl_frontend64_wb
);
inst_clkgen: entity work.clkgen
GENERIC MAP
(
clk_in_freq_hz => sys_freq,
clk_out_freq_hz => tsvga.f_pxl_clk
)
PORT MAP
(
rst => rst_in,
clk_in => CLK_O,
clk_out => vga_clk,
locked => vga_clk_lock
);
inst_vga_frontend : vga_frontend64
GENERIC MAP
(
fifo_depth => 2048,
fifo_almost_full_thresh => 1860,
fifo_almost_full_thresh => 2048-128,
fifo_almost_empty_thresh => 256,
tsvga => tsvga
)
@@ -926,7 +913,7 @@ inst_vga_frontend : vga_frontend64
-- VGA signals
vga_clk_in => vga_clk,
vga_clk_ce => vga_clk_lock,
vga_clk_ce => dcm_lock,
vga_red => sys_vga_red,
vga_green => sys_vga_green,
vga_blue => sys_vga_blue,