嗨，我在使用 handel-c 显示静态图像时遇到问题，通过 DE2-115 VGA 创建测试模式。
由于某种原因，我无法将图像输出到显示器。
这是我的 tpad.hcc 代码：
#include "tpad.hch"
macro proc lcd_driver( lcd ) {
unsigned 24 colour;
unsigned 1 de;
interface bus_out() tpad_RGB( unsigned 24 clr = colour )
//Post pin for RGB color
//with {data = {"V27","U28","U27","R28","R27","V26",
//"T22","T21","R23","R22","R21","P21",
//"J26","L28","V25","V22","U22","V28"},
with {data = {"D12","D11","C12","A11","B11","C11","A10","B10", //BLUE
"C9","F10","B8","C8","H12","F8","G11","G8", //GREEN
"H10","H8","J12","G10","F12","D10","E11","E12"}, //RED
standard = "LVCMOS33"};
interface bus_out() tpad_control( unsigned 3 ctrl = (!__clock) @ 1 @de)
with {data = {"C13","F11","A12", "G13","C10"},
standard = "LVCMOS33"};
//VHDL driver
//entity vga_controller is
//port (
// pixel_clk : IN STD_LOGIC; --pixel clock at frequency of VGA mode being used
// reset_n : IN STD_LOGIC; --active low asycnchronous reset
// h_sync : OUT STD_LOGIC; --horiztonal sync pulse
// v_sync : OUT STD_LOGIC; --vertical sync pulse
// disp_ena : OUT STD_LOGIC; --display enable ('1' = display time, '0' = blanking time)
// column : OUT INTEGER; --horizontal pixel coordinate
// row : OUT INTEGER; --vertical pixel coordinate
// n_blank : OUT STD_LOGIC; --direct blacking output to DAC
// n_sync : OUT STD_LOGIC --sync-on-green output to DAC
// );
//END vga_controller;
interface vga_controller( unsigned 11 row, unsigned 11 column, unsigned 1 disp_ena,
unsigned 1 h_sync, unsigned 1 v_sync, unsigned 1 n_sync,
unsigned 1 n_blank)
tpad_lcd( unsigned 1 pixel_clk = __clock, unsigned 1 reset_n = 0)
with {busformat = "B[I]"};
do par {
colour = lcd.r @ lcd.g @ lcd.b; // Synchronise LCD output signals
//de = !lcd.nb;
de = 1;
lcd.x = tpad_lcd.row;
lcd.y = tpad_lcd.column;
lcd.hs = tpad_lcd.h_sync;
lcd.vs = tpad_lcd.v_sync;
lcd.ns = tpad_lcd.n_sync;
lcd.nb = tpad_lcd.n_blank;
lcd.de = 1;
} while (1);
}
我的 tpad.hch：
typedef struct {
signal unsigned 11 x, y; // Position on display
signal unsigned 8 r, g, b; // Colour to display
signal unsigned 1 hs, vs, ns, nb, de; // syncronisation signals
} lcd_data;
macro proc lcd_driver( lcd );
这是我的 demo.hcc：
#include "tpad.hch"
set family = AlteraCycloneIII; /* Really a Cyclone IV */
set part = "EP4CE115F29C7";
interface bus_in (unsigned 1 pin) clock_pin () with {data = {"Y2"}};
interface altpll (unsigned 5 clk with {clockport = 1})
pll (unsigned 2 inclk = 0 @ clock_pin.pin)
with {
busformat = "B[N:0]",
properties = {
{"bandwidth_type", "AUTO"},
{"clk0_divide_by", "5"},
{"clk0_duty_cycle", "50"},
{"clk0_multiply_by", "4"},
{"clk0_phase_shift", "0"},
{"compensate_clock", "CLK0"},
{"inclk0_input_frequency", "20000"},
{"intended_device_family", "Cyclone IV E"},
{"lpm_hint", "CBX_MODULE_PREFIX=pll"},
{"lpm_type", "altpll"},
{"operation_mode", "NORMAL"},
{"pll_type", "AUTO"},
{"port_clk0", "PORT_USED"},
{"width_clock", "5"}},
bind = 1};
set clock = internal pll.clk[0];
void main( void ) {
lcd_data lcd;
par {
lcd_driver( lcd );
do par {
lcd.r = lcd.x[7:0]; // Generate a simple test pattern
lcd.g = lcd.y[7:0];
lcd.b = (lcd.x + lcd.y)[9:2];
} while (1);
}
}
这是我的 VHDL 代码：
--------------------------------------------------------------------------------
--
-- FileName: vga_controller.vhd
-- Dependencies: none
-- Design Software: Quartus II 64-bit Version 12.1 Build 177 SJ Full Version
--
-- HDL CODE IS PROVIDED "AS IS." DIGI-KEY EXPRESSLY DISCLAIMS ANY
-- WARRANTY OF ANY KIND, WHETHER EXPRESS OR IMPLIED, INCLUDING BUT NOT
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
-- PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL DIGI-KEY
-- BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR CONSEQUENTIAL
-- DAMAGES, LOST PROFITS OR LOST DATA, HARM TO YOUR EQUIPMENT, COST OF
-- PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR SERVICES, ANY CLAIMS
-- BY THIRD PARTIES (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF),
-- ANY CLAIMS FOR INDEMNITY OR CONTRIBUTION, OR OTHER SIMILAR COSTS.
--
-- Version History
-- Version 1.0 05/10/2013 Scott Larson
-- Initial Public Release
--
--------------------------------------------------------------------------------
LIBRARY ieee;
USE ieee.std_logic_1164.all;
USE ieee.numeric_std.all;
ENTITY vga_controller IS
GENERIC(
h_pulse : INTEGER := 128; --horiztonal sync pulse width in pixels
h_bp : INTEGER := 88; --horiztonal back porch width in pixels
h_pixels : INTEGER := 800; --horiztonal display width in pixels
h_fp : INTEGER := 40; --horiztonal front porch width in pixels
h_pol : STD_LOGIC := '1'; --horizontal sync pulse polarity (1 = positive, 0 = negative)
v_pulse : INTEGER := 4; --vertical sync pulse width in rows
v_bp : INTEGER := 23; --vertical back porch width in rows
v_pixels : INTEGER := 600; --vertical display width in rows
v_fp : INTEGER := 1; --vertical front porch width in rows
v_pol : STD_LOGIC := '1'); --vertical sync pulse polarity (1 = positive, 0 = negative)
PORT(
pixel_clk : IN STD_LOGIC; --pixel clock at frequency of VGA mode being used
reset_n : IN STD_LOGIC; --active low asycnchronous reset
h_sync : OUT STD_LOGIC; --horiztonal sync pulse
v_sync : OUT STD_LOGIC; --vertical sync pulse
disp_ena : OUT STD_LOGIC; --display enable ('1' = display time, '0' = blanking time)
column : OUT STD_LOGIC_vector (10 downto 0); --horizontal pixel coordinate
row : OUT STD_LOGIC_vector (10 downto 0); --vertical pixel coordinate
n_blank : OUT STD_LOGIC; --direct blacking output to DAC
n_sync : OUT STD_LOGIC); --sync-on-green output to DAC
END vga_controller;
ARCHITECTURE behavior OF vga_controller IS
CONSTANT h_period : INTEGER := h_pulse + h_bp + h_pixels + h_fp; --total number of pixel clocks in a row
CONSTANT v_period : INTEGER := v_pulse + v_bp + v_pixels + v_fp; --total number of rows in column
BEGIN
n_blank <= '1'; --no direct blanking
n_sync <= '0'; --no sync on green
PROCESS(pixel_clk, reset_n)
VARIABLE h_count : INTEGER RANGE 0 TO h_period - 1 := 0; --horizontal counter (counts the columns)
VARIABLE v_count : INTEGER RANGE 0 TO v_period - 1 := 0; --vertical counter (counts the rows)
--VARIABLE h_count : unsigned (7 downto 0) := "00000000";
--VARIABLE v_count : unsigned (7 downto 0) := "00000000";
BEGIN
IF(reset_n = '0') THEN --reset asserted
h_count := 0; --reset horizontal counter
v_count := 0; --reset vertical counter
h_sync <= NOT h_pol; --deassert horizontal sync
v_sync <= NOT v_pol; --deassert vertical sync
disp_ena <= '0'; --disable display
column <= "00000000000"; --reset column pixel coordinate
row <= "00000000000"; --reset row pixel coordinate
ELSIF(pixel_clk'EVENT AND pixel_clk = '1') THEN
--counters
IF(h_count < h_period - 1) THEN --horizontal counter (pixels)
h_count := h_count + 1;
ELSE
h_count := 0;
IF(v_count < v_period - 1) THEN --veritcal counter (rows)
v_count := v_count + 1;
ELSE
v_count := 0;
END IF;
END IF;
--horizontal sync signal
IF(h_count < h_pixels + h_fp OR h_count > h_pixels + h_fp + h_pulse) THEN
h_sync <= NOT h_pol; --deassert horiztonal sync pulse
ELSE
h_sync <= h_pol; --assert horiztonal sync pulse
END IF;
--vertical sync signal
IF(v_count < v_pixels + v_fp OR v_count > v_pixels + v_fp + v_pulse) THEN
v_sync <= NOT v_pol; --deassert vertical sync pulse
ELSE
v_sync <= v_pol; --assert vertical sync pulse
END IF;
--set pixel coordinates
IF(h_count < h_pixels) THEN --horiztonal display time
--column <= h_count; --set horiztonal pixel coordinate
column <= std_logic_vector(to_unsigned(h_count, column'length)); --set horiztonal pixel coordinate
END IF;
IF(v_count < v_pixels) THEN --vertical display time
--row <= v_count; --set vertical pixel coordinate
row <= std_logic_vector(to_unsigned(v_count, column'length)); --set vertical pixel coordinate
END IF;
--set display enable output
IF(h_count < h_pixels AND v_count < v_pixels) THEN --display time
disp_ena <= '1'; --enable display
ELSE --blanking time
disp_ena <= '0'; --disable display
END IF;
END IF;
END PROCESS;
END behavior;