The saga continues...
As I mentioned, I have multiple Picoblaze instances in my design. Using the registers between Picoblaze and Chipscope allowed me to debug the first instance. I have now shifted to the second Picoblaze and have encountered a new problem. I now have Chipscope attached to my second Picoblaze using registers to isolate the two. When I compile the design I get all the way to Bitgen and receive the following error messages:
ERROR:PhysDesignRules:2108 - Issue with pin connections and/or configuration on block:<instFlashInterface/Mram_LchipTable>:<RAMB18E1_RAMB18E1>. For TDP or SDP mode, REGCLKARDRCLK should be tied off to 0 when DOA_REG is 0.
ERROR:PhysDesignRules:2105 - Issue with pin connections and/or configuration on block:<instFlashInterface/Mram_LchipTable>:<RAMB18E1_RAMB18E1>. For TDP mode, REGCLKB should be tied off to 0 when DOB_REG is 0.
I have found that if I still get these errors when I disconnect the registers from the Picoblaze and connect them to ground.
genChipscope : if (ChipScope) generate
begin
-- register picoblaze signals to isolate from chipscope
-- this eliminates a PACK:2811 bug in the design tools
process (SysClk)
begin
if rising_edge(SysClk) then -- if rising edge of clock
address_c <= (others => '0');
instruction_c <= (others => '0');
in_port_c <= (others => '0');
out_port_c <= (others => '0');
port_id_c <= (others => '0');
misc_c <= (others => '0');
-- address_c <= address;
-- instruction_c <= instruction;
-- in_port_c <= in_port;
-- out_port_c <= out_port;
-- port_id_c <= port_id;
-- misc_c <= "00000" & k_write_strobe & write_strobe & read_strobe;
end if;
end process;
-- instantiate chipscope ILA unit
instila : ila_picoblaze port map (
control => ila_control,
clk => SysClk,
trig0 => address_c,
trig1 => instruction_c,
trig2 => in_port_c,
trig3 => out_port_c,
trig4 => port_id_c,
trig5 => misc_c
);
end generate;
