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Line 66... |
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//
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//
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// Testbench mechanics
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// Testbench mechanics
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//
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//
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reg [7:0] program_mem[(1<<(`MEMORY_ADR_WIDTH+2))-1:0];
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reg [7:0] program_mem[(1<<(`MEMORY_ADR_WIDTH+2))-1:0];
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integer initialize, firmware_size, ptr;
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integer initialize, ptr;
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reg [8*64:0] file_name;
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reg [8*64:0] file_name;
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integer firmware_size; // Note that the .hex file size is greater than this, as each byte in the file needs 2 hex characters.
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integer firmware_size_in_header;
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reg load_file;
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reg load_file;
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initial begin
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initial begin
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design_ready = 1'b0;
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design_ready = 1'b0;
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uart_echo = 1'b1;
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uart_echo = 1'b1;
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Line 105... |
`endif
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`endif
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//get firmware hex file from command line input
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//get firmware hex file from command line input
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if ( load_file ) begin
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if ( load_file ) begin
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if ( ! $value$plusargs("file_name=%s", file_name) || file_name == 0 ) begin
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if ( ! $value$plusargs("file_name=%s", file_name) || file_name == 0 ) begin
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$display("ERROR: please specify an input file to start.");
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$display("ERROR: Please specify the name of the firmware file to load on start-up.");
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$finish;
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$finish;
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end
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end
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$readmemh(file_name, program_mem);
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// First word comprehends size of program
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// We are passing the firmware size separately as a command-line argument in order
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firmware_size = { program_mem[0] , program_mem[1] , program_mem[2] , program_mem[3] };
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// to avoid this kind of Icarus Verilog warnings:
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// WARNING: minsoc_bench_core.v:111: $readmemh: Standard inconsistency, following 1364-2005.
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// WARNING: minsoc_bench_core.v:111: $readmemh(../../sw/uart/uart.hex): Not enough words in the file for the requested range [0:32767].
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// Apparently, some of the $readmemh() warnigns are even required by the standard. The trouble is,
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// Verilog's $fread() is not widely implemented in the simulators, so from Verilog alone
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// it's not easy to read the firmware file header without getting such warnings.
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if ( ! $value$plusargs("firmware_size=%d", firmware_size) ) begin
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$display("ERROR: Please specify the size of the firmware (in bytes) contained in the hex firmware file.");
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$finish;
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end
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$readmemh(file_name, program_mem, 0, firmware_size - 1);
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firmware_size_in_header = { program_mem[0] , program_mem[1] , program_mem[2] , program_mem[3] };
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if ( firmware_size != firmware_size_in_header ) begin
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$display("ERROR: The firmware size in the file header does not match the firmware size given as command-line argument. Did you forget bin2hex's -size_word flag when generating the firmware file?");
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$finish;
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end
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end
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end
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`ifdef INITIALIZE_MEMORY_MODEL
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`ifdef INITIALIZE_MEMORY_MODEL
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// Initialize memory with firmware
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// Initialize memory with firmware
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initialize = 0;
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initialize = 0;
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