Richard29
Member level 1
Hi all,
I have a very simple statemachine that sets some control signals to interact with a third party IP. The code looks roughly as follows:
Sythesis works fine, however, when applying the following constraint file I get ERROR:ConstraintSystem:59 - NET "testip/ip_we" not found. The same occurs for testip/ip_datain and testip/ip_ce.
I checked the netlist, and indeed there is neither a testip/ip_we, a testip/ip_ce nor a testip/ip_datain net. Anyone an idea why the other nets are not in the netlist, all very confusing.
Many thanks for any feedback!
I have a very simple statemachine that sets some control signals to interact with a third party IP. The code looks roughly as follows:
Code:
entity testip is
port (
...
fifo_dataout : in std_logic_vector(0 to 31);
ip_dataout : in std_logic_vector(0 to 31);
ip_ce : out std_logic;
ip_we : out std_logic;
ip_datain : out std_logic_vector(0 to 31);
);
end entity testip;
architecture imp of testip is
signal ip_ce_ns : std_logic;
signal ip_we_ns : std_logic;
signal ip_ce_cs : std_logic;
signal ip_we_cs : std_logic;
signal ip_dataout_i : std_logic_vector(0 to 31);
...
begin
COMB : process (...)
begin
ip_ce_ns <= ip_ce_cs;
ip_we_ns <= ip_we_cs;
case ip_nstate_cs is
when IDLE =>
...
end case;
end process COMB;
REG: process (Clk) is
begin
if (Clk'event and Clk = '1') then
if (Rst = '1') then
ip_ce_cs <= '1';
ip_we_cs <= '1';
...
else
ip_ce_cs <= ip_ce_ns;
ip_we_cs <= ip_we_ns;
...
end if;
end if;
end process REG;
S0: ip_ce <= ip_ce_cs;
S1: ip_we <= ip_we_cs;
S2: ip_datain <= fifo_dataout;
S3: ip_dataout_i <= Ip_dataout;
end architecture imp;Sythesis works fine, however, when applying the following constraint file I get ERROR:ConstraintSystem:59 - NET "testip/ip_we" not found. The same occurs for testip/ip_datain and testip/ip_ce.
Code:
Net testip/ip_datain<*> MAXDELAY = 2 ns;
Net testip/ip_ce MAXDELAY = 2 ns;
Net testip/ip_we MAXDELAY = 2 ns;I checked the netlist, and indeed there is neither a testip/ip_we, a testip/ip_ce nor a testip/ip_datain net. Anyone an idea why the other nets are not in the netlist, all very confusing.
Many thanks for any feedback!
Last edited: