riscv
/
caravel
mirror of https://github.com/efabless/caravel.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

add jtag connections to the scan chain

This commit is contained in:
mo-hosni 2024-03-13 16:57:29 +02:00
parent 1906b111f3
commit 2ccbd5ec0d
1 changed files with 21 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
verilog/rtl/caravel_core.v
View File

@ -260,6 +260,9 @@ module caravel_core (
wire mprj_vdd_pwrgood;
wire mprj2_vdd_pwrgood;
//
wire sc_tdo;
`ifdef USE_SRAM_RO_INTERFACE
// SRAM read-only access from housekeeping
wire hkspi_sram_clk;
@ -281,6 +284,14 @@ module caravel_core (
.core_clk(caravel_clk),
.core_rstn(caravel_rstn),
// Scan chain tap ports
.tck(mgmt_io_in[31]),
.tms(mgmt_io_in[30]),
.tdi(mgmt_io_in[29]),
.trst(mgmt_io_in[28]),
.tdo(sc_tdo),
.tdo_paden_o(),
// GPIO (1 pin)
.gpio_out_pad(gpio_out_core),
.gpio_in_pad(gpio_in_core),
@ -536,7 +547,7 @@ module caravel_core (
// DCO/Digital Locked Loop
digital_pll pll (
digital_locked_loop pll (
`ifdef USE_POWER_PINS
.VPWR(vccd),
.VGND(vssd),
@ -565,7 +576,7 @@ module caravel_core (
// Housekeeping interface
housekeeping housekeeping (
housekeeping_alt housekeeping (
`ifdef USE_POWER_PINS
.VPWR(vccd),
.VGND(vssd),
@ -686,9 +697,10 @@ module caravel_core (
.mgmt_gpio_out(mgmt_gpio_out),
.mgmt_gpio_out_buf(mgmt_gpio_out_buf)
);
assign mgmt_gpio_in = mgmt_io_in[(`MPRJ_IO_PADS-1):(`MPRJ_IO_PADS_1)];
assign mgmt_gpio_out = mgmt_io_out_hk[(`MPRJ_IO_PADS-1):(`MPRJ_IO_PADS_1)];
assign mgmt_gpio_in = {mgmt_io_in[37:32], 4'd0, mgmt_io_in[27:19]}; // disconnected 4 GPIOs inputs for the scan chain tap ports (tck, tms, tdi, trst)
// assign mgmt_gpio_in = mgmt_io_in[(`MPRJ_IO_PADS-1):(`MPRJ_IO_PADS_1)];
assign mgmt_gpio_out = {mgmt_io_out_hk[37:28], sc_tdo, mgmt_io_out_hk[26:19]}; // connected sc_tdo at GPIO 27
// assign mgmt_gpio_out = mgmt_io_out_hk[(`MPRJ_IO_PADS-1):(`MPRJ_IO_PADS_1)];
assign mgmt_gpio_oeb = mgmt_io_oeb_hk[(`MPRJ_IO_PADS-1):(`MPRJ_IO_PADS-3)];
assign mgmt_io_in_hk = {mgmt_gpio_in_buf, mgmt_io_in[(`MPRJ_IO_PADS_1-1):0]};
@ -1427,8 +1439,9 @@ module caravel_core (
.spare_xfq(spare_xfq_nc),
.spare_xfqn(spare_xfqn_nc)
);
(* keep *) empty_macro empty_macro_0 ();
(* keep *) empty_macro empty_macro_1 ();
(* keep *) manual_power_connections manual_power_connections ();
(* keep *) mprj_vias mprj_vias ();
(* keep *) padframe_power_connections padframe_power_connections ();
endmodule
// `default_nettype wire