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从OpenCores网站下了 wb_lpc,添加进e203,寄存器读写都不行,一读就挂死了。
后来照着sirv_gnrl_icb32towishb8改了一个支持32位数据的,也一样的效果。 请过来人有空指点一二,非常感谢 在e203_subsys_perips.v中增加的内容如下: wire plc0_icb_cmd_valid; wire plc0_icb_cmd_ready; wire [31:0] plc0_icb_cmd_addr; wire plc0_icb_cmd_read; wire [31:0] plc0_icb_cmd_wdata; wire [3:0] plc0_icb_cmd_wmask; wire plc0_icb_rsp_valid; wire plc0_icb_rsp_ready; wire [31:0] plc0_icb_rsp_rdata; wire plc0_icb_rsp_err; wire [31:0] plc0_wishbone_addr; // lower address bits wire [31:0] plc0_wishbone_dat_write; // databus input wire [31:0] plc0_wishbone_dat_read; // databus output wire plc0_wishbone_write_en; // write enable input wire plc0_wishbone_stb; // stobe/core select signal wire plc0_wishbone_cyc; // valid bus cycle input wire plc0_wishbone_ack; // bus cycle acknowledge output //following three signal is needed by wb_lpc_periph, not but supported by sirv_gnrl_icb32towishb wire [3:0] plc0_wishbone_sel; wire [1:0] plc0_wishbone_tga; wire plc0_wishbone_err; //for LPC pins signal wire iopads_plc0_frame_oen; wire iopads_plc0_lad_output_oen; wire [3:0] iopads_plc0_lad_o_oen; wire iopads_plc0_frame; wire iopads_plc0_lad_output_en; wire [3:0] iopads_plc0_lad_i; wire [3:0] iopads_plc0_lad_o; .o15_icb_enable (1'b1), .o15_icb_cmd_valid (plc0_icb_cmd_valid), .o15_icb_cmd_ready (plc0_icb_cmd_ready), .o15_icb_cmd_addr (plc0_icb_cmd_addr), .o15_icb_cmd_read (plc0_icb_cmd_read), .o15_icb_cmd_wdata (plc0_icb_cmd_wdata), .o15_icb_cmd_wmask (plc0_icb_cmd_wmask), .o15_icb_cmd_lock (), .o15_icb_cmd_excl (), .o15_icb_cmd_size (), .o15_icb_cmd_burst (), .o15_icb_cmd_beat (), .o15_icb_rsp_valid (plc0_icb_rsp_valid), .o15_icb_rsp_ready (plc0_icb_rsp_ready), .o15_icb_rsp_err (plc0_icb_rsp_err), .o15_icb_rsp_excl_ok(1'b0), .o15_icb_rsp_rdata (plc0_icb_rsp_rdata), sirv_gnrl_icb32towishb32 # ( .AW (32) ) lpc0_icbtowishon_bus ( .i_icb_cmd_valid (plc0_icb_cmd_valid), .i_icb_cmd_ready (plc0_icb_cmd_ready), .i_icb_cmd_read (plc0_icb_cmd_read), .i_icb_cmd_addr (plc0_icb_cmd_addr), .i_icb_cmd_wdata (plc0_icb_cmd_wdata), .i_icb_cmd_size (), .i_icb_rsp_valid (plc0_icb_rsp_valid), .i_icb_rsp_ready (plc0_icb_rsp_ready), .i_icb_rsp_err (plc0_icb_rsp_err), .i_icb_rsp_rdata (plc0_icb_rsp_rdata), .wb_adr (plc0_wishbone_addr), // lower address bits .wb_dat_w (plc0_wishbone_dat_write), // databus input .wb_dat_r (plc0_wishbone_dat_read), // databus output .wb_we (plc0_wishbone_dat_write_en), // write enable input .wb_stb (plc0_wishbone_dat_stb), // stobe/core select signal .wb_cyc (plc0_wishbone_dat_cyc), // valid bus cycle input .wb_ack (plc0_wishbone_dat_ack), // bus cycle acknowledge output .clk (clk ), .rst_n (bus_rst_n) ); wb_lpc_periph plc0_device( .clk_i(clk), .nrst_i(bus_rst_n), .wbm_adr_o(plc0_wishbone_addr), .wbm_dat_o(plc0_wishbone_dat_write), .wbm_dat_i(plc0_wishbone_dat_read), .wbm_sel_o(plc0_wishbone_sel), .wbm_tga_o(plc0_wishbone_tga), .wbm_we_o(plc0_wishbone_dat_write_en), .wbm_stb_o(plc0_wishbone_dat_stb), .wbm_cyc_o(plc0_wishbone_dat_cyc), .wbm_ack_i(plc0_wishbone_dat_ack), .wbm_err_i(plc0_wishbone_err), .lframe_i(iopads_plc0_frame), .lad_i(iopads_plc0_lad_i), .lad_o(iopads_plc0_lad_o), .lad_oe(iopads_plc0_lad_output_en) ); sirv_gnrl_icbs.v 中增加的内容: module sirv_gnrl_icb32towishb32 # ( parameter AW = 32 ) ( input i_icb_cmd_valid, output i_icb_cmd_ready, input [1-1:0] i_icb_cmd_read, input [31:0] i_icb_cmd_addr, input [31:0] i_icb_cmd_wdata, input [1:0] i_icb_cmd_size, output i_icb_rsp_valid, input i_icb_rsp_ready, output i_icb_rsp_err, output [31:0] i_icb_rsp_rdata, // The 32bits wishbone slave (e.g., I2C) must be accessed by load/store byte instructions output [31:0] wb_adr, // lower address bits output [31:0] wb_dat_w, // databus input input [31:0] wb_dat_r, // databus output output wb_we, // write enable input output wb_stb, // stobe/core select signal output wb_cyc, // valid bus cycle input input wb_ack, // bus cycle acknowledge output input clk, input rst_n ); assign wb_adr = i_icb_cmd_addr; assign wb_we = ~i_icb_cmd_read; // The 32bits bus to 8bits bus remapping assign wb_dat_w = i_icb_cmd_wdata; //wire [32-1:0] wb_dat_r_remap = {24'b0,wb_dat_r} << {i_icb_cmd_addr[1:0],3'b0}; // Since the Wishbone reponse channel does not have handhake scheme, but the // ICB have, so the response may not be accepted by the upstream master // So in order to make sure the functionality is correct, we must put // a reponse bypass-buffer here, to always be able to accept response from wishbone // sirv_gnrl_fifo # ( .CUT_READY (1), .MSKO (0), .DP(1), .DW(32) ) u_rsp_fifo( .i_vld(wb_ack), .i_rdy(), .i_dat(wb_dat_r), .o_vld(i_icb_rsp_valid), .o_rdy(i_icb_rsp_ready), .o_dat(i_icb_rsp_rdata), .clk (clk ), .rst_n(rst_n) ); // We only initiate the reqeust when the response buffer is empty, to make // sure when the response back from wishbone we can alway be able to // accept it assign wb_stb = (~i_icb_rsp_valid) & i_icb_cmd_valid; assign wb_cyc = (~i_icb_rsp_valid) & i_icb_cmd_valid; assign i_icb_cmd_ready = (~i_icb_rsp_valid) & wb_ack; assign i_icb_rsp_err = 1'b0;// Wishbone have no error response endmodule |
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e203 rom启动仅仅是引导到itcm执行指令吗?flash启动就是加载指令到itcm中吗?
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