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https://opencores.org/ocsvn/i2c/i2c/trunk
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Rev 49 → Rev 50
/trunk/bench/verilog/tst_bench_top.v
37,10 → 37,10
|
// CVS Log |
// |
// $Id: tst_bench_top.v,v 1.5 2004-02-28 15:32:55 rherveille Exp $ |
// $Id: tst_bench_top.v,v 1.6 2004-02-28 15:40:42 rherveille Exp $ |
// |
// $Date: 2004-02-28 15:32:55 $ |
// $Revision: 1.5 $ |
// $Date: 2004-02-28 15:40:42 $ |
// $Revision: 1.6 $ |
// $Author: rherveille $ |
// $Locker: $ |
// $State: Exp $ |
47,7 → 47,18
// |
// Change History: |
// $Log: not supported by cvs2svn $ |
// Revision 1.4 2003/12/05 11:04:38 rherveille |
// Added slave address configurability |
// |
// Revision 1.3 2002/10/30 18:11:06 rherveille |
// Added timing tests to i2c_model. |
// Updated testbench. |
// |
// Revision 1.2 2002/03/17 10:26:38 rherveille |
// Fixed some race conditions in the i2c-slave model. |
// Added debug information. |
// Added headers. |
// |
|
`include "timescale.v" |
|
67,21 → 78,30
wire ack; |
wire inta; |
|
reg [1:0] cpol, cpha; |
reg [2:0] e; |
reg [7:0] q, qq; |
|
wire sck, mosi, miso; |
reg [7:0] q; |
wire scl, scl_o, scl_oen; |
wire sda, sda_o, sda_oen; |
reg rscl, rsda; |
|
parameter SPCR = 2'b00; |
parameter SPSR = 2'b01; |
parameter SPDR = 2'b10; |
parameter SPER = 2'b11; |
parameter PRER_LO = 3'b000; |
parameter PRER_HI = 3'b001; |
parameter CTR = 3'b010; |
parameter RXR = 3'b011; |
parameter TXR = 3'b011; |
parameter CR = 3'b100; |
parameter SR = 3'b100; |
|
parameter TXR_R = 3'b101; // undocumented / reserved output |
parameter CR_R = 3'b110; // undocumented / reserved output |
|
parameter RD = 1'b1; |
parameter WR = 1'b0; |
parameter SADR = 7'b0010_000; |
|
// |
// Module body |
// |
integer n; |
|
// generate clock |
always #5 clk = ~clk; |
88,47 → 108,61
|
// hookup wishbone master model |
wb_master_model #(8, 32) u0 ( |
.clk (clk), |
.rst (rstn), |
.adr (adr), |
.din (dat_i), |
.clk(clk), |
.rst(rstn), |
.adr(adr), |
.din(dat_i), |
.dout(dat_o), |
.cyc (cyc), |
.stb (stb), |
.we (we), |
.sel (), |
.ack (ack), |
.err (1'b0), |
.rty (1'b0) |
.cyc(cyc), |
.stb(stb), |
.we(we), |
.sel(), |
.ack(ack), |
.err(1'b0), |
.rty(1'b0) |
); |
|
// hookup spi core |
simple_spi_top spi_top ( |
// hookup wishbone_i2c_master core |
i2c_master_top i2c_top ( |
|
// wishbone interface |
.clk_i (clk), |
.rst_i (rstn), |
.cyc_i (cyc), |
.stb_i (stb), |
.adr_i (adr[1:0]), |
.we_i (we), |
.dat_i (dat_o), |
.dat_o (dat_i), |
.ack_o (ack), |
.inta_o(inta), |
.wb_clk_i(clk), |
.wb_rst_i(1'b0), |
.arst_i(rstn), |
.wb_adr_i(adr[2:0]), |
.wb_dat_i(dat_o), |
.wb_dat_o(dat_i), |
.wb_we_i(we), |
.wb_stb_i(stb), |
.wb_cyc_i(cyc), |
.wb_ack_o(ack), |
.wb_inta_o(inta), |
|
.sck_o (sck), |
.mosi_o(mosi), |
.miso_i(miso) |
// i2c signals |
.scl_pad_i(scl), |
.scl_pad_o(scl_o), |
.scl_padoen_o(scl_oen), |
.sda_pad_i(sda), |
.sda_pad_o(sda_o), |
.sda_padoen_o(sda_oen) |
); |
|
// hookup spi slave model |
spi_slave_model spi_slave ( |
.csn(1'b0), |
.sck(sck), |
.di(mosi), |
.do(miso) |
// hookup i2c slave model |
i2c_slave_model #(SADR) i2c_slave ( |
.scl(scl), |
.sda(sda) |
); |
|
// create i2c lines |
always rscl = #600 scl_oen ? 1'bz : scl_o; // create tri-state buffer for i2c_master scl line |
always rsda = #600 sda_oen ? 1'bz : sda_o; // create tri-state buffer for i2c_master sda line |
|
assign scl = rscl; |
assign sda = rsda; |
|
pullup p1(scl); // pullup scl line |
pullup p2(sda); // pullup sda line |
|
initial |
begin |
`ifdef WAVES |
137,11 → 171,14
$display("INFO: Signal dump enabled ...\n\n"); |
`endif |
|
// force spi_slave.debug = 1'b1; // enable spi_slave debug information |
force spi_slave.debug = 1'b0; // disable spi_slave debug information |
// force i2c_slave.debug = 1'b1; // enable i2c_slave debug information |
force i2c_slave.debug = 1'b0; // disable i2c_slave debug information |
|
$display("\nstatus: %t Testbench started\n\n", $time); |
|
// $dumpfile("bench.vcd"); |
// $dumpvars(1, tst_bench_top); |
// $dumpvars(1, tst_bench_top.i2c_slave); |
|
// initially values |
clk = 0; |
160,57 → 197,214
// |
// program core |
// |
for (cpol=0; cpol<=1; cpol=cpol+1) |
for (cpha=0; cpha<=1; cpha=cpha+1) |
for (e=0; e<=3; e=e+1) |
begin |
//set cpol/cpha in spi slave model |
force spi_slave.cpol=cpol[0]; |
force spi_slave.cpha=cpha[0]; |
$display("cpol:%b, cpha:%b, e:%b", cpol[0],cpha[0],e[1:0]); |
|
// program internal registers |
// program internal registers |
u0.wb_write(1, PRER_LO, 8'hfa); // load prescaler lo-byte |
u0.wb_write(1, PRER_LO, 8'hc8); // load prescaler lo-byte |
u0.wb_write(1, PRER_HI, 8'h00); // load prescaler hi-byte |
$display("status: %t programmed registers", $time); |
|
// load control register |
u0.wb_write(1, SPCR, {4'b0101,cpol[0],cpha[0],e[1:0]} ); |
//verify control register |
u0.wb_cmp (0, SPCR, {4'b0101,cpol[0],cpha[0],e[1:0]} ); |
u0.wb_cmp(0, PRER_LO, 8'hc8); // verify prescaler lo-byte |
u0.wb_cmp(0, PRER_HI, 8'h00); // verify prescaler hi-byte |
$display("status: %t verified registers", $time); |
|
|
// load extended control register |
u0.wb_write(1,SPER,8'h0); |
//verify extended control register |
u0.wb_cmp (0,SPER,8'h0); |
u0.wb_write(1, CTR, 8'h80); // enable core |
$display("status: %t core enabled", $time); |
|
//fill memory |
for(n=0;n<8;n=n+1) begin |
u0.wb_write(1,SPDR,{cpol[0],cpha[0],e[1:0],n[3:0]}); |
//wait for transfer to finish |
u0.wb_read(1,SPSR,q); |
while(~q[7]) u0.wb_read(1,SPSR,q); |
//clear 'spif' bit |
u0.wb_write(1,SPSR,8'h80); |
end |
// |
// access slave (write) |
// |
|
//verify memory |
for(n=0;n<8;n=n+1) begin |
u0.wb_write(1,SPDR,~n); |
//wait for transfer to finish |
u0.wb_read(1,SPSR,q); |
while(~q[7]) u0.wb_read(1,SPSR,q); |
//clear 'spif' bit |
u0.wb_write(1,SPSR,8'h80); |
//verify memory content |
u0.wb_cmp(0,SPDR,{cpol[0],cpha[0],e[1:0],n[3:0]}); |
end |
end |
// drive slave address |
u0.wb_write(1, TXR, {SADR,WR} ); // present slave address, set write-bit |
u0.wb_write(0, CR, 8'h90 ); // set command (start, write) |
$display("status: %t generate 'start', write cmd %0h (slave address+write)", $time, {SADR,WR} ); |
|
// check tip bit |
// u0.wb_read(1, SR, q); |
// while(q[1]) |
// u0.wb_read(1, SR, q); // poll it until it is zero |
// $display("status: %t tip==0", $time); |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(0, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// send memory address |
u0.wb_write(1, TXR, 8'h01); // present slave's memory address |
u0.wb_write(0, CR, 8'h10); // set command (write) |
$display("status: %t write slave memory address 01", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(0, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// send memory contents |
u0.wb_write(1, TXR, 8'ha5); // present data |
u0.wb_write(0, CR, 8'h10); // set command (write) |
$display("status: %t write data a5", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// send memory contents for next memory address (auto_inc) |
u0.wb_write(1, TXR, 8'h5a); // present data |
u0.wb_write(0, CR, 8'h50); // set command (stop, write) |
$display("status: %t write next data 5a, generate 'stop'", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// |
// delay |
// |
// #100000; // wait for 100us. |
// $display("status: %t wait 100us", $time); |
|
// |
// access slave (read) |
// |
|
// drive slave address |
u0.wb_write(1, TXR,{SADR,WR} ); // present slave address, set write-bit |
u0.wb_write(0, CR, 8'h90 ); // set command (start, write) |
$display("status: %t generate 'start', write cmd %0h (slave address+write)", $time, {SADR,WR} ); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// send memory address |
u0.wb_write(1, TXR, 8'h01); // present slave's memory address |
u0.wb_write(0, CR, 8'h10); // set command (write) |
$display("status: %t write slave address 01", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// drive slave address |
u0.wb_write(1, TXR, {SADR,RD} ); // present slave's address, set read-bit |
u0.wb_write(0, CR, 8'h90 ); // set command (start, write) |
$display("status: %t generate 'repeated start', write cmd %0h (slave address+read)", $time, {SADR,RD} ); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// read data from slave |
u0.wb_write(1, CR, 8'h20); // set command (read, ack_read) |
$display("status: %t read + ack", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// check data just received |
u0.wb_read(1, RXR, qq); |
if(qq !== 8'ha5) |
$display("\nERROR: Expected a5, received %x at time %t", qq, $time); |
else |
$display("status: %t received %x", $time, qq); |
|
// read data from slave |
u0.wb_write(1, CR, 8'h20); // set command (read, ack_read) |
$display("status: %t read + ack", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// check data just received |
u0.wb_read(1, RXR, qq); |
if(qq !== 8'h5a) |
$display("\nERROR: Expected 5a, received %x at time %t", qq, $time); |
else |
$display("status: %t received %x", $time, qq); |
|
// read data from slave |
u0.wb_write(1, CR, 8'h20); // set command (read, ack_read) |
$display("status: %t read + ack", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// check data just received |
u0.wb_read(1, RXR, qq); |
$display("status: %t received %x from 3rd read address", $time, qq); |
|
// read data from slave |
u0.wb_write(1, CR, 8'h28); // set command (read, nack_read) |
$display("status: %t read + nack", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// check data just received |
u0.wb_read(1, RXR, qq); |
$display("status: %t received %x from 4th read address", $time, qq); |
|
// |
// check invalid slave memory address |
// |
|
// drive slave address |
u0.wb_write(1, TXR, {SADR,WR} ); // present slave address, set write-bit |
u0.wb_write(0, CR, 8'h90 ); // set command (start, write) |
$display("status: %t generate 'start', write cmd %0h (slave address+write). Check invalid address", $time, {SADR,WR} ); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// send memory address |
u0.wb_write(1, TXR, 8'h10); // present slave's memory address |
u0.wb_write(0, CR, 8'h10); // set command (write) |
$display("status: %t write slave memory address 10", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
// slave should have send NACK |
$display("status: %t Check for nack", $time); |
if(!q[7]) |
$display("\nERROR: Expected NACK, received ACK\n"); |
|
// read data from slave |
u0.wb_write(1, CR, 8'h40); // set command (stop) |
$display("status: %t generate 'stop'", $time); |
|
// check tip bit |
u0.wb_read(1, SR, q); |
while(q[1]) |
u0.wb_read(1, SR, q); // poll it until it is zero |
$display("status: %t tip==0", $time); |
|
#250000; // wait 250us |
$display("\n\nstatus: %t Testbench done", $time); |
$finish; |
218,3 → 412,5
|
endmodule |
|
|
|
/trunk/bench/verilog/wb_master_model.v
37,10 → 37,10
|
// CVS Log |
// |
// $Id: wb_master_model.v,v 1.3 2004-02-28 15:32:55 rherveille Exp $ |
// $Id: wb_master_model.v,v 1.4 2004-02-28 15:40:42 rherveille Exp $ |
// |
// $Date: 2004-02-28 15:32:55 $ |
// $Revision: 1.3 $ |
// $Date: 2004-02-28 15:40:42 $ |
// $Revision: 1.4 $ |
// $Author: rherveille $ |
// $Locker: $ |
// $State: Exp $ |
54,14 → 54,14
parameter dwidth = 32; |
parameter awidth = 32; |
|
input clk, rst; |
output [awidth:1] adr; |
input [dwidth:1] din; |
output [dwidth:1] dout; |
output cyc, stb; |
output we; |
output [dwidth/8:1] sel; |
input ack, err, rty; |
input clk, rst; |
output [awidth -1:0] adr; |
input [dwidth -1:0] din; |
output [dwidth -1:0] dout; |
output cyc, stb; |
output we; |
output [dwidth/8 -1:0] sel; |
input ack, err, rty; |
|
//////////////////////////////////////////////////////////////////// |
// |
68,13 → 68,13
// Local Wires |
// |
|
reg [awidth:1] adr; |
reg [dwidth:1] dout; |
reg cyc, stb; |
reg we; |
reg [dwidth/8:1] sel; |
reg [awidth -1:0] adr; |
reg [dwidth -1:0] dout; |
reg cyc, stb; |
reg we; |
reg [dwidth/8 -1:0] sel; |
|
reg [dwidth:1] q; |
reg [dwidth -1:0] q; |
|
//////////////////////////////////////////////////////////////////// |
// |
104,8 → 104,8
input delay; |
integer delay; |
|
input [awidth:1] a; |
input [dwidth:1] d; |
input [awidth -1:0] a; |
input [dwidth -1:0] d; |
|
begin |
|
123,7 → 123,7
@(posedge clk); |
|
// wait for acknowledge from slave |
while(~ack) @(posedge clk); |
while(~ack) @(posedge clk); |
|
// negate wishbone signals |
#1; |
146,8 → 146,8
input delay; |
integer delay; |
|
input [awidth:1] a; |
output [dwidth:1] d; |
input [awidth -1:0] a; |
output [dwidth -1:0] d; |
|
begin |
|
165,7 → 165,7
@(posedge clk); |
|
// wait for acknowledge from slave |
while(~ack) @(posedge clk); |
while(~ack) @(posedge clk); |
|
// negate wishbone signals |
#1; |
189,14 → 189,14
input delay; |
integer delay; |
|
input [awidth:1] a; |
input [dwidth:1] d_exp; |
input [awidth -1:0] a; |
input [dwidth -1:0] d_exp; |
|
begin |
wb_read (delay, a, q); |
wb_read (delay, a, q); |
|
if (d_exp !== q) |
$display("Data compare error. Received %h, expected %h at time %t", q, d_exp, $time); |
if (d_exp !== q) |
$display("Data compare error. Received %h, expected %h at time %t", q, d_exp, $time); |
end |
endtask |
|