blob: c3622d0ef4ec3853c1e02c29b7f4c006eb9afc7a [file] [log] [blame]
`include "openram_defines.v"
module openram_testchip(
`ifdef USE_POWER_PINS
inout vdda1, // User area 1 3.3V supply
inout vdda2, // User area 2 3.3V supply
inout vssa1, // User area 1 analog ground
inout vssa2, // User area 2 analog ground
inout vccd1, // User area 1 1.8V supply
inout vccd2, // User area 2 1.8v supply
inout vssd1, // User area 1 digital ground
inout vssd2, // User area 2 digital ground
`endif
input resetn,
input clk,
input la_in_load,
input la_sram_load,
input [`TOTAL_SIZE-1:0] la_data_in,
// GPIO bit to clock control register
input gpio_in,
input gpio_scan,
input gpio_sram_load,
input global_csb,
// SRAM data outputs to be captured
input [`DATA_SIZE-1:0] sram0_data0,
input [`DATA_SIZE-1:0] sram0_data1,
input [`DATA_SIZE-1:0] sram1_data0,
input [`DATA_SIZE-1:0] sram1_data1,
input [`DATA_SIZE-1:0] sram2_data0,
input [`DATA_SIZE-1:0] sram2_data1,
input [`DATA_SIZE-1:0] sram3_data0,
input [`DATA_SIZE-1:0] sram3_data1,
input [`DATA_SIZE-1:0] sram4_data0,
input [`DATA_SIZE-1:0] sram4_data1,
input [`DATA_SIZE-1:0] sram5_data0,
input [`DATA_SIZE-1:0] sram5_data1,
input [`DATA_SIZE-1:0] sram6_data0,
input [`DATA_SIZE-1:0] sram6_data1,
input [`DATA_SIZE-1:0] sram7_data0,
input [`DATA_SIZE-1:0] sram7_data1,
input [`DATA_SIZE-1:0] sram8_data0,
input [`DATA_SIZE-1:0] sram8_data1,
input [`DATA_SIZE-1:0] sram9_data0,
input [`DATA_SIZE-1:0] sram9_data1,
input [`DATA_SIZE-1:0] sram10_data0,
input [`DATA_SIZE-1:0] sram10_data1,
input [`DATA_SIZE-1:0] sram11_data0,
input [`DATA_SIZE-1:0] sram11_data1,
input [`DATA_SIZE-1:0] sram12_data0,
input [`DATA_SIZE-1:0] sram12_data1,
input [`DATA_SIZE-1:0] sram13_data0,
input [`DATA_SIZE-1:0] sram13_data1,
input [`DATA_SIZE-1:0] sram14_data0,
input [`DATA_SIZE-1:0] sram14_data1,
input [`DATA_SIZE-1:0] sram15_data0,
input [`DATA_SIZE-1:0] sram15_data1,
// Shared control/data to the SRAMs
output reg [`ADDR_SIZE-1:0] addr0,
output reg [`DATA_SIZE-1:0] din0,
output reg web0,
output reg [`WMASK_SIZE-1:0] wmask0,
output reg [`ADDR_SIZE-1:0] addr1,
output reg [`DATA_SIZE-1:0] din1,
output reg web1,
output reg [`WMASK_SIZE-1:0] wmask1,
// One CSB for each SRAM
// One CSB for each SRAM
output reg [`MAX_CHIPS-1:0] csb0,
output reg [`MAX_CHIPS-1:0] csb1,
output reg [`TOTAL_SIZE-1:0] la_data_out,
output reg gpio_out
);
// Store input instruction
reg [`TOTAL_SIZE-1:0] sram_register;
reg csb0_temp;
reg csb1_temp;
// Mux output to connect final output data
// into sram_register
reg [`DATA_SIZE-1:0] read_data0;
reg [`DATA_SIZE-1:0] read_data1;
// SRAM input connections
reg [`SELECT_SIZE-1:0] chip_select;
always @ (posedge clk) begin
if(!resetn) begin
sram_register <= {`TOTAL_SIZE{1'b0}};
end
// GPIO scanning for transfer
else if(gpio_scan) begin
sram_register <= {sram_register[`TOTAL_SIZE-2:0], gpio_in};
end
// LA parallel load
else if(la_in_load) begin
sram_register <= la_data_in;
end
// Store results for read out
else if(gpio_sram_load || la_sram_load) begin
sram_register <= {sram_register[`TOTAL_SIZE-1:`TOTAL_SIZE-`SELECT_SIZE-`ADDR_SIZE],
read_data0,
sram_register[`ADDR_SIZE+`DATA_SIZE+2*`WMASK_SIZE+3:`DATA_SIZE+`WMASK_SIZE+2],
read_data1,
sram_register[`WMASK_SIZE+1:0]};
end
end
// Splitting register bits into fields
always @(*) begin
chip_select = sram_register[`TOTAL_SIZE-1:`TOTAL_SIZE-`SELECT_SIZE];
addr0 = sram_register[`TOTAL_SIZE-`SELECT_SIZE-1:`TOTAL_SIZE-`SELECT_SIZE-`ADDR_SIZE];
din0 = sram_register[`DATA_SIZE+`PORT_SIZE+`WMASK_SIZE+1:`PORT_SIZE+`WMASK_SIZE+2];
csb0_temp = global_csb | sram_register[`PORT_SIZE+`WMASK_SIZE+1];
web0 = sram_register[`PORT_SIZE+`WMASK_SIZE];
wmask0 = sram_register[`PORT_SIZE+`WMASK_SIZE-1:`PORT_SIZE];
addr1 = sram_register[`PORT_SIZE-1:`DATA_SIZE+`WMASK_SIZE+2];
din1 = sram_register[`DATA_SIZE+`WMASK_SIZE+1:`WMASK_SIZE+2];
csb1_temp = global_csb | sram_register[`WMASK_SIZE+1];
web1 = sram_register[`WMASK_SIZE];
wmask1 = sram_register[`WMASK_SIZE-1:0];
end
// Apply the correct CSB
always @(*) begin
csb0 = ~( (~{15'b111111111111111, csb0_temp}) << chip_select);
csb1 = ~( (~{15'b111111111111111, csb1_temp}) << chip_select);
end
// Mux value of correct SRAM data input to feed into
// DFF clocked by la/gpio clk
always @ (*) begin
case(chip_select)
4'd0: begin
read_data0 = sram0_data0;
read_data1 = sram0_data1;
end
4'd1: begin
read_data0 = sram1_data0;
read_data1 = sram1_data1;
end
4'd2: begin
read_data0 = sram2_data0;
read_data1 = sram2_data1;
end
4'd3: begin
read_data0 = sram3_data0;
read_data1 = sram3_data1;
end
4'd4: begin
read_data0 = sram4_data0;
read_data1 = sram4_data1;
end
4'd5: begin
read_data0 = sram5_data0;
read_data1 = sram5_data1;
end
4'd6: begin
read_data0 = sram6_data0;
read_data1 = sram6_data1;
end
4'd7: begin
read_data0 = sram7_data0;
read_data1 = sram7_data1;
end
4'd8: begin
read_data0 = sram8_data0;
read_data1 = sram8_data1;
end
4'd9: begin
read_data0 = sram9_data0;
read_data1 = sram9_data1;
end
4'd10: begin
read_data0 = sram10_data0;
read_data1 = sram10_data1;
end
4'd11: begin
read_data0 = sram11_data0;
read_data1 = sram11_data1;
end
4'd12: begin
read_data0 = sram12_data0;
read_data1 = sram12_data1;
end
4'd13: begin
read_data0 = sram13_data0;
read_data1 = sram13_data1;
end
4'd14: begin
read_data0 = sram14_data0;
read_data1 = sram14_data1;
end
4'd15: begin
read_data0 = sram15_data0;
read_data1 = sram15_data1;
end
endcase
end
// Output logic
always @ (*) begin
gpio_out = sram_register[`TOTAL_SIZE-1];
la_data_out = sram_register;
end
endmodule