Multi-source in Unit <dpram> on signal <Mcount_addr_12>; this signal is connected to

Multi-source in Unit <dpram> on signal <Mcount_addr_12>; this signal is connected to

Hi,
I am using dual port ram as two single port ram of diiferent width, one with 11 & other with 9. this is required for designing nand flash memory controller.one port is used for sending 2048 bytes to nand flash and the other port for sending 512 bytes to ecc module to generate parity bits.
i am getting these errors for dual port ram alone(not yet integrated with any other module).

Here is the code
module dpram(
clk,clk1, // Clock Input
address_0 , // address_0 Input
data_0,
cs_0 , // Chip Select
we_0 , // Write Enable/Read Enable
re_0 , // Output Enable
address_1 , // address_1 Input
data_1 , // data_1 bi-directional
cs_1 , // Chip Select
we_1 , // Write Enable/Read Enable
re_1 , // Output Enable
data_out0,
data_out1
);

//--------------Global Parameters-----------------
parameter DATA_WIDTH = 8 ;
parameter ADDR_WIDTH0 = 8 ;
parameter ADDR_WIDTH1 =8;
parameter RAM_DEPTH0 = 1 << ADDR_WIDTH0;
parameter RAM_DEPTH1 = 1 << ADDR_WIDTH1;

//--------------Input Ports-----------------------
inout [ADDR_WIDTH0-1:0] address_0;
inout [ADDR_WIDTH1-1:0] address_1;
input cs_0,clk,we_0,re_0 ;
input cs_1,clk1,we_1,re_1;
inout [DATA_WIDTH-1:0] data_0,data_1;

//--------------Internal variables----------------
reg [DATA_WIDTH-1:0] mem0 [0:RAM_DEPTH0-1];
reg [DATA_WIDTH-1:0] mem1 [0:RAM_DEPTH1-1];
reg [ADDR_WIDTH0-1:0] addr_0;
reg [ADDR_WIDTH1-1:0] addr_1;
reg [DATA_WIDTH-1:0] data0,data1;

//--------------Output Ports----------------
output reg [DATA_WIDTH-1:0] data_out0 ;
output reg [DATA_WIDTH-1:0] data_out1 ;

//--------------Code Starts Here------------------

initial
begin
addr_0=0;
addr_1=0;
data0=0;
data1=0;
end


assign address_0=addr_0;
assign address_1=addr_1;
assign data_0=data0;
assign data_1=data1;


// Memory Write Block
// Write Operation : When we_0 = 1, cs_0 = 1
always @ (posedge clk)
begin : MEM_WRITE
if ( cs_0 && we_0 )
begin

mem0[address_0] <= data_0;
end
end

always @ (posedge clk1)
begin : MEM_WRITE1
if (cs_1 && we_1)
begin
mem1[address_1] <= data_1;
end
end



always@(posedge clk)
begin
if ( cs_0 && we_0 )
begin
addr_0=addr_0+1;
data0=data0+1;
end
end


always@(posedge clk1)
begin
if ( cs_1 && we_1 )
begin
addr_1=addr_1+1;
data1=data1+1;
end
end



// Memory Read Block
// Read Operation : When we_0 = 0, oe_0 = 1, cs_0 = 1
always @ (posedge clk)
begin : MEM_READ_0
if (cs_0 && ! we_0 && re_0)
begin

data_out0 <= mem0[address_0];

end
else
begin
data_out0 <= 0;
end
end

always@(posedge clk)
begin

if (cs_0 && ! we_0 && re_0)
addr_0=addr_0+1;

end

//Second Port of RAM
// Memory Read Block 1
// Read Operation : When we_1 = 0, oe_1 = 1, cs_1 = 1
always @ (posedge clk1)
begin : MEM_READ_1
if (cs_1 && ! we_1 && re_1) begin
data_out1 <= mem1[address_1];
end else begin
data_out1 <= 0;
end
end


always@(posedge clk1)
begin
if (cs_1 && ! we_1 && re_1)
addr_1=addr_1+1;
end
endmodule

Errors are as follows
ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_0_cy<0>>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_0_0>
Output signal of FDE instance <addr_0_ren_0>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_02>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_0_1>
Output signal of FDE instance <addr_0_ren_1>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_04>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_0_2>
Output signal of FDE instance <addr_0_ren_2>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_06>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_0_3>
Output signal of FDE instance <addr_0_ren_3>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_08>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_0_4>
Output signal of FDE instance <addr_0_ren_4>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_010>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_0_5>
Output signal of FDE instance <addr_0_ren_5>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_012>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_0_6>
Output signal of FDE instance <addr_0_ren_6>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_014>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_0_7>
Output signal of FDE instance <addr_0_ren_7>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_1_cy<0>>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_1_0>
Output signal of FDE instance <addr_1_ren_0>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_12>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_1_1>
Output signal of FDE instance <addr_1_ren_1>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_14>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_1_2>
Output signal of FDE instance <addr_1_ren_2>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_16>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_1_3>
Output signal of FDE instance <addr_1_ren_3>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_18>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_1_4>
Output signal of FDE instance <addr_1_ren_4>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_110>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_1_5>
Output signal of FDE instance <addr_1_ren_5>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_112>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_1_6>
Output signal of FDE instance <addr_1_ren_6>

ERROR:Xst:528 - Multi-source in Unit <dpram> on signal <Mcount_addr_114>; this signal is connected to multiple drivers.
Drivers are:
Output signal of FDE instance <addr_1_7>
Output signal of FDE instance <addr_1_ren_7>


Total REAL time to Xst completion: 4.00 secs
Total CPU time to Xst completion: 3.63 secs

-->

Total memory usage is 203392 kilobytes

Number of errors : 16 ( 0 filtered)
Number of warnings : 0 ( 0 filtered)
Number of infos : 4 ( 0 filtered)

Kindly please do solve this problem

thank you

Re: Multi-source in Unit <dpram> on signal <Mcount_addr_12>; this signal is connected

without saying what I think of the rtl itself...
one error is here:


the second is similar;

shortly: you can't assign values to the same node
in multiply 'always' block, this gives
'multisource error'

a quick fix could be:

but you can do it in more elegant way;

j.a