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Altera_Forum
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13 years ago

Best way to interface my CPU

Hello, I am wondering what is the best way to interface my 32-bit RISC CPU. I need to interface it with the sdram memory, the flash memory, and possibly the sram memory. I will also need to dedicate ...
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Altera_Forum
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13 years ago

Here is a simplified version of my warnings: 

Warning (10037): Verilog HDL or VHDL warning at testMIPS_QSYS_sdram_0.v(316): conditional expression evaluates to a constant
Warning (10037): Verilog HDL or VHDL warning at testMIPS_QSYS_sdram_0.v(326): conditional expression evaluates to a constant
Warning (10037): Verilog HDL or VHDL warning at testMIPS_QSYS_sdram_0.v(336): conditional expression evaluates to a constant
Warning (10037): Verilog HDL or VHDL warning at testMIPS_QSYS_sdram_0.v(680): conditional expression evaluates to a constant
Warning (10037): Verilog HDL or VHDL warning at testMIPS_QSYS_nios2_qsys_0.v(1501): conditional expression evaluates to a constant
Warning (10037): Verilog HDL or VHDL warning at testMIPS_QSYS_nios2_qsys_0.v(1503): conditional expression evaluates to a constant
Warning (10037): Verilog HDL or VHDL warning at testMIPS_QSYS_nios2_qsys_0.v(1659): conditional expression evaluates to a constant
Warning (10037): Verilog HDL or VHDL warning at testMIPS_QSYS_nios2_qsys_0.v(2578): conditional expression evaluates to a constant
Warning (10492): VHDL Process Statement warning at test_slave.vhd(26): signal "the_register" is read inside the Process Statement but isn't in the Process Statement's sensitivity list
Warning (10492): VHDL Process Statement warning at test_slave.vhd(29): signal "the_register" is read inside the Process Statement but isn't in the Process Statement's sensitivity list
Warning (12241): 3 hierarchies have connectivity warnings - see the Connectivity Checks report folder
Warning (13046): Tri-state node(s) do not directly drive top-level pin(s)
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
	Warning (13047): Converted the fan-out from the tri-state buffer "testMIPS_QSYS:inst|is61lv256al_if:is61lv25616al_0|SRAM_DATA" to the node "testMIPS_QSYS:inst|altera_merlin_slave_translator:is61lv25616al_0_s1_translator|av_readdata_pre" into an OR gate
Warning (13024): Output pins are stuck at VCC or GND
	Warning (13410): Pin "sdram_wire_cke" is stuck at VCC
Warning (332174): Ignored filter at altera_reset_controller.sdc(18): *|alt_rst_sync_uq1|altera_reset_synchronizer_int_chain*|clrn could not be matched with a pin
Warning (332049): Ignored set_false_path at altera_reset_controller.sdc(18): Argument <to> is an empty collection
	Info (332050): set_false_path -to 
Warning (332060): Node: clk was determined to be a clock but was found without an associated clock assignment.
Warning (332060): Node: testMIPS_QSYS:inst|vga_controller_signal_generator:vga_controller_0|HCount:b2v_inst|counter was determined to be a clock but was found without an associated clock assignment.
Warning (332056): PLL cross checking found inconsistent PLL clock settings:
	Warning (332056): Node: inst|altpll_0|sd1|pll|clk was found missing 1 generated clock that corresponds to a base clock with a period of: 20.000
Warning (176250): Ignoring invalid fast I/O register assignments. See the Ignored Assignments panel in the Fitter Compilation Report for more information.
Warning (306006): Found 108 output pins without output pin load capacitance assignment
Warning (171167): Found invalid Fitter assignments. See the Ignored Assignments panel in the Fitter Compilation Report for more information.
Warning (169174): The Reserve All Unused Pins setting has not been specified, and will default to 'As output driving ground'.