loop_cnt = loop_cnt + 1 if loop_cnt < 100 else 1
时间: 2023-06-19 22:07:41 浏览: 132
这行代码的作用是将 `loop_cnt` 的值加 1,并且如果加 1 后 `loop_cnt` 的值小于 100,那么就将 `loop_cnt` 的值更新为加 1 后的值;如果加 1 后 `loop_cnt` 的值大于等于 100,那么就将 `loop_cnt` 的值更新为 1。这样做的目的是让 `loop_cnt` 始终保持在 1-100 的范围内。
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将下面这个Verilog代码转化成VHDL代码“module Tem_Top_tb( ); reg i_clk = 1'b0 ; reg i_rst = 1'b0 ; reg i_ADC_clk ; reg [9:0] i_ADC ; wire o_LED ; wire o_Serial_data; Tem_Top Tem_Top_inst( .i_clk (i_clk ), .i_rst (i_rst ), .i_ADC_clk (i_ADC_clk ), .i_ADC (i_ADC ), .o_LED (o_LED ), .o_Serial_data(o_Serial_data ) ); initial begin i_clk = 0; i_rst = 1; i_ADC_clk = 0; #1000 i_rst = 0; end always #10 i_clk = ~i_clk; always #20 i_ADC_clk = ~i_ADC_clk; reg [19:0] r_cnt = 20'd0; always @(posedge i_ADC_clk)begin if(i_rst == 1'b1) r_cnt <=20'd0; else r_cnt <= r_cnt + 1'b1; end always @(posedge i_ADC_clk)begin case (r_cnt) 20'd200 :i_ADC <= 10'd10 ; 20'd4000 :i_ADC <= 10'd87 ; 20'd15000 :i_ADC <= 10'd108 ; 20'd19500 :i_ADC <= 10'd135 ; 20'd20000 :i_ADC <= 10'd160 ; 20'd40000 :i_ADC <= 10'd115 ; 20'd60000 :i_ADC <= 10'd32 ; 20'd80000 :i_ADC <= 10'd198 ; 20'd100000 :i_ADC <= 10'd248 ; endcase end endmodule”
entity Tem_Top_tb is
end entity;
architecture Behavioral of Tem_Top_tb is
signal i_clk : std_logic := '0';
signal i_rst : std_logic := '0';
signal i_ADC_clk : std_logic;
signal i_ADC : std_logic_vector(9 downto 0);
signal o_LED : std_logic;
signal o_Serial_data : std_logic;
begin
Tem_Top_inst : entity work.Tem_Top
port map (
i_clk => i_clk,
i_rst => i_rst,
i_ADC_clk => i_ADC_clk,
i_ADC => i_ADC,
o_LED => o_LED,
o_Serial_data => o_Serial_data
);
process
begin
i_clk <= '0';
i_rst <= '1';
i_ADC_clk <= '0';
wait for 1000 ns;
i_rst <= '0';
loop
wait for 10 ns;
i_clk <= not i_clk;
end loop;
end process;
process
begin
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait for 20 ns;
i_ADC_clk <= not i_ADC_clk;
wait;
end process;
process
begin
wait until rising_edge(i_ADC_clk);
if i_rst = '1' then
r_cnt <= "00000000000000000000";
else
r_cnt <= r_cnt + 1;
end if;
wait until rising_edge(i_ADC_clk);
case r_cnt is
when 20000 =>
i_ADC <= "0000001010";
when 400000 =>
i_ADC <= "0101010111";
when 1500000 =>
i_ADC <= "0110110100";
when 1950000 =>
i_ADC <= "1000010111";
when 2000000 =>
i_ADC <= "1010000000";
when 4000000 =>
i_ADC <= "0111000111";
when 6000000 =>
i_ADC <= "0010000010";
when 8000000 =>
i_ADC <= "1100011000";
when 10000000 =>
i_ADC <= "11111000";
when others =>
null;
end case;
end process;
end Behavioral;
reg [7:0] byte_bit_shift_cnt ; reg [127:0] mosi_bit_equ ; reg [127:0] miso_bit_equ ; generate for (genvar i = 0; i <= 127 ; i = i + 1) begin: loop always @ (posedge clk) begin if (rst) mosi_bit_equ[i] <= 1'b1; else if (mosi_bit_mask_sft_reg[i]) mosi_bit_equ[i] <= 1'b1; else mosi_bit_equ[i] <= (mosi_shift_reg[i] == mosi_bit_cmp_sft_reg[i]); end always @ (posedge clk) begin if (rst) miso_bit_equ[i] <= 1'b1; else if (miso_bit_mask_sft_reg[i]) miso_bit_equ[i] <= 1'b1; else miso_bit_equ[i] <= (miso_shift_reg[i] == miso_bit_cmp_sft_reg[i]); end end endgenerate
这段代码是一个generate块,用于生成128个循环的always块。这些always块用于在时钟的上升沿触发时更新`mosi_bit_equ`和`miso_bit_equ`寄存器的值。
在这个generate块中,执行以下操作:
1. 声明一个8位的寄存器`byte_bit_shift_cnt`。
2. 声明两个128位的寄存器`mosi_bit_equ`和`miso_bit_equ`。
3. 使用generate循环,循环次数为0到127,每次增加1。
4. 在每次循环中,定义一个名为`loop`的begin-end块。
5. 在`loop`块中,使用always块并在posedge时钟触发时执行以下操作:
- 如果复位信号`rst`为高电平,则将`mosi_bit_equ`的第i位设置为1。
- 否则,如果`mosi_bit_mask_sft_reg`的第i位为高电平,则将`mosi_bit_equ`的第i位设置为1。
- 否则,将根据`mosi_shift_reg`和`mosi_bit_cmp_sft_reg`的第i位是否相等来更新`mosi_bit_equ`的第i位。
- 类似地,在另一个always块中,根据相应的条件更新`miso_bit_equ`的第i位。
这段代码的作用是生成128个循环的always块,并在时钟上升沿触发时根据特定条件更新`mosi_bit_equ`和`miso_bit_equ`寄存器的值。它用于实现比较操作,判断`mosi_shift_reg`和`mosi_bit_cmp_sft_reg`以及`miso_shift_reg`和`miso_bit_cmp_sft_reg`是否相等,并将结果存储在相应的寄存器中。
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