joppe/fpga_modem
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Added soclet with gpio banks to top

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This commit is contained in:
Joppe Blondel
2026-02-22 20:00:42 +01:00
parent a97028c2ba
commit 20cfece6e3
14 changed files with 321 additions and 172 deletions
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86
project.cfg
View File

@@ -4,12 +4,6 @@ version = 0.1
out_dir = out out_dir = out
build_dir = build build_dir = build
[server]
hostname = localhost
port = 2020
privkey = /home/joppe/.ssh/id_rsa
pubkey = /home/joppe/.ssh/id_rsa.pub
[target.synth] [target.synth]
toolchain = ISE toolchain = ISE
ise_settings = /opt/Xilinx/14.7/ISE_DS/settings64.sh ise_settings = /opt/Xilinx/14.7/ISE_DS/settings64.sh
@@ -30,32 +24,7 @@ files_verilog = rtl/util/conv.vh
rtl/core/decimate_by_r_q15.v rtl/core/decimate_by_r_q15.v
rtl/arch/spartan-6/lvds_comparator.v rtl/arch/spartan-6/lvds_comparator.v
rtl/arch/spartan-6/clk_gen.v rtl/arch/spartan-6/clk_gen.v
files_con = boards/mimas_v1/constraints.ucf rtl/serv/serv_aligner.v
files_other = rtl/util/rc_alpha_q15.vh
[target.ip]
toolchain = ISE_IP
ise_settings = /opt/Xilinx/14.7/ISE_DS/settings64.sh
family = spartan6
device = xc6slx9
package = tqg144
speedgrade = -2
files_def = boards/mimas_v1/ip/mem_8kx8b.xco
#boards/mimas_v1/ip/clk_gen.xco
[target.serv]
toolchain = ISE
ise_settings = /opt/Xilinx/14.7/ISE_DS/settings64.sh
family = spartan6
device = xc6slx9
package = tqg144
speedgrade = -2
toplevel = top_generic
xst_opts = -vlgincdir rtl
files_con = boards/mimas_v1/constraints.ucf
files_other = sw/blinky/blinky.hex
rtl/util/clog2.vh
files_verilog = rtl/serv/serv_aligner.v
rtl/serv/serv_alu.v rtl/serv/serv_alu.v
rtl/serv/serv_bufreg.v rtl/serv/serv_bufreg.v
rtl/serv/serv_bufreg2.v rtl/serv/serv_bufreg2.v
@@ -79,9 +48,22 @@ files_verilog = rtl/serv/serv_aligner.v
rtl/serv/servile.v rtl/serv/servile.v
rtl/serv/serving_ram.v rtl/serv/serving_ram.v
rtl/serv/serving.v rtl/serv/serving.v
rtl/arch/spartan-6/clk_gen.v
rtl/wb/wb_gpio.v rtl/wb/wb_gpio.v
rtl/toplevel/top_serv.v rtl/wb/wb_gpio_banks.v
rtl/core/soclet.v
files_con = boards/mimas_v1/constraints.ucf
files_other = rtl/util/rc_alpha_q15.vh
rtl/util/clog2.vh
sw/blinky/blinky.hex
[target.ip]
toolchain = ISE_IP
ise_settings = /opt/Xilinx/14.7/ISE_DS/settings64.sh
family = spartan6
device = xc6slx9
package = tqg144
speedgrade = -2
files_def = boards/mimas_v1/ip/clk_gen.xco
[target.sim] [target.sim]
toolchain = iverilog toolchain = iverilog
@@ -102,39 +84,3 @@ files_verilog = sim/tb/tb_nco_q15.v
sim/overrides/clk_gen.v sim/overrides/clk_gen.v
files_other = rtl/util/conv.vh files_other = rtl/util/conv.vh
rtl/util/rc_alpha_q15.vh rtl/util/rc_alpha_q15.vh
[target.servsim]
toolchain = iverilog
runtime = all
toplevel = tb_serving
ivl_opts = -Irtl/util
files_other = sw/blinky/blinky.hex
rtl/util/clog2.vh
files_verilog = rtl/serv/serv_aligner.v
rtl/serv/serv_alu.v
rtl/serv/serv_bufreg.v
rtl/serv/serv_bufreg2.v
rtl/serv/serv_compdec.v
rtl/serv/serv_csr.v
rtl/serv/serv_ctrl.v
rtl/serv/serv_debug.v
rtl/serv/serv_decode.v
rtl/serv/serv_immdec.v
rtl/serv/serv_mem_if.v
rtl/serv/serv_rf_if.v
rtl/serv/serv_rf_ram_if.v
rtl/serv/serv_rf_ram.v
rtl/serv/serv_rf_top.v
rtl/serv/serv_state.v
rtl/serv/serv_synth_wrapper.v
rtl/serv/serv_top.v
rtl/serv/servile_arbiter.v
rtl/serv/servile_mux.v
rtl/serv/servile_rf_mem_if.v
rtl/serv/servile.v
rtl/serv/serving_ram.v
rtl/serv/serving.v
rtl/arch/spartan-6/clk_gen.v
rtl/wb/wb_gpio.v
rtl/toplevel/top_serv.v
sim/tb/tb_serving.v

77
rtl/core/soclet.v Normal file
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@@ -0,0 +1,77 @@
`timescale 1ns/1ps
module soclet #(
parameter memfile = "",
parameter memsize = 8192,
parameter sim = 1'b0
)(
input wire i_clk,
input wire i_rst,
input wire [31:0] i_GPI_A,
input wire [31:0] i_GPI_B,
input wire [31:0] i_GPI_C,
input wire [31:0] i_GPI_D,
output wire [31:0] o_GPO_A,
output wire [31:0] o_GPO_B,
output wire [31:0] o_GPO_C,
output wire [31:0] o_GPO_D
);
wire [31:0] wb_adr;
wire [31:0] wb_dat;
wire [31:0] wb_rdt;
wire [3:0] wb_sel;
wire wb_we;
wire wb_stb;
wire wb_ack;
wire [4*32-1:0] GPO;
wire [4*32-1:0] GPI;
assign o_GPO_A = GPO[32*1-1:32*0];
assign o_GPO_B = GPO[32*2-1:32*1];
assign o_GPO_C = GPO[32*3-1:32*2];
assign o_GPO_D = GPO[32*4-1:32*3];
assign GPI[32*1-1:32*0] = i_GPI_A;
assign GPI[32*2-1:32*1] = i_GPI_B;
assign GPI[32*3-1:32*2] = i_GPI_C;
assign GPI[32*4-1:32*3] = i_GPI_D;
serving #(
.memfile(memfile),
.memsize(memsize),
.sim(sim),
.RESET_STRATEGY("MINI"),
.WITH_CSR(1)
) serv (
.i_clk(i_clk),
.i_rst(i_rst),
.i_timer_irq(1'b0),
.i_wb_rdt(wb_rdt),
.i_wb_ack(wb_ack),
.o_wb_adr(wb_adr),
.o_wb_dat(wb_dat),
.o_wb_sel(wb_sel),
.o_wb_we(wb_we),
.o_wb_stb(wb_stb)
);
wb_gpio_banks #(
.BASE_ADDR(32'h40000000),
.NUM_BANKS(4)
) gpio (
.i_wb_clk(i_clk),
.i_wb_rst(i_rst),
.i_wb_dat(wb_dat),
.i_wb_adr(wb_adr),
.i_wb_we(wb_we),
.i_wb_stb(wb_stb),
.i_wb_sel(wb_sel),
.i_gpio(GPI),
.o_wb_rdt(wb_rdt),
.o_wb_ack(wb_ack),
.o_gpio(GPO)
);
endmodule

44
rtl/toplevel/top_generic.v
View File

@@ -22,38 +22,36 @@ module top_generic(
.clk_out_15(clk_15) .clk_out_15(clk_15)
); );
reg [11:0] count; wire [31:0] GPIO_A;
localparam integer DIV_MAX = 100_000 - 1; // 1 ms tick at 100 MHz wire [31:0] GPIO_B;
reg [16:0] div_counter = 0; // enough bits for 100k (2^17=131072) wire [31:0] GPIO_C;
reg [31:0] freq; wire [31:0] GPIO_D;
always @(posedge clk_15) begin
if (!aresetn) begin soclet #(
div_counter <= 0; .memfile("../sw/sweep/sweep.hex")
count <= 0; ) mcu (
end else begin .i_clk(clk_15),
if (div_counter == DIV_MAX) begin .i_rst(!aresetn),
div_counter <= 0; .i_GPI_A(GPIO_A),
if (count == 12'd3999) .i_GPI_B(GPIO_B),
count <= 0; // wrap at 4000 .i_GPI_C(GPIO_C),
else .i_GPI_D(GPIO_D),
count <= count + 1'b1; // increment every 1 ms .o_GPO_A(GPIO_A),
end else begin .o_GPO_B(GPIO_B),
div_counter <= div_counter + 1'b1; .o_GPO_C(GPIO_C),
end .o_GPO_D(GPIO_D)
end );
freq <= count;
end
wire [15:0] sin_q15; wire [15:0] sin_q15;
wire clk_en; wire clk_en;
nco_q15 #( nco_q15 #(
.CLK_HZ(15_000_000), .CLK_HZ(15_000_000),
.FS_HZ(40_000) .FS_HZ(80_000)
) nco ( ) nco (
.clk (clk_15), .clk (clk_15),
.rst_n (aresetn), .rst_n (aresetn),
.freq_hz(freq), .freq_hz(GPIO_A),
.sin_q15(sin_q15), .sin_q15(sin_q15),
.cos_q15(), .cos_q15(),
.clk_en (clk_en) .clk_en (clk_en)

70
rtl/toplevel/top_serv.v
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@@ -1,70 +0,0 @@
`timescale 1ns/1ps
module top_generic(
input wire aclk,
input wire aresetn,
output wire led_green,
output wire led_red,
output wire[5:0] r2r
);
// Clocking
wire clk_100;
wire clk_15;
assign clk_100 = aclk;
clk_gen clocking(
.clk_in(clk_100),
.clk_out_15(clk_15)
);
wire [31:0] wb_adr;
wire [31:0] wb_dat;
wire [31:0] wb_rdt;
wire [3:0] wb_sel;
wire wb_we;
wire wb_stb;
wire wb_ack;
wire [31:0] GPIO;
assign led_green = GPIO[0];
assign led_red = GPIO[1];
assign r2r = GPIO[8:2];
serving #(
.memfile("../sw/blinky/blinky.hex"),
.memsize(8192),
.sim(1'b0),
.RESET_STRATEGY("MINI"),
.WITH_CSR(1)
) serv (
.i_clk(clk_15),
.i_rst(!aresetn),
.i_timer_irq(1'b0),
.i_wb_rdt(wb_rdt),
.i_wb_ack(wb_ack),
.o_wb_adr(wb_adr),
.o_wb_dat(wb_dat),
.o_wb_sel(wb_sel),
.o_wb_we(wb_we),
.o_wb_stb(wb_stb)
);
wb_gpio #(
.address(32'h40000000)
) gpio (
.i_wb_clk(clk_15),
.i_wb_rst(!aresetn),
.i_wb_dat(wb_dat),
.i_wb_adr(wb_adr),
.i_wb_we(wb_we),
.i_wb_stb(wb_stb),
.i_wb_sel(wb_sel),
.o_wb_rdt(wb_rdt),
.o_wb_ack(wb_ack),
.o_gpio(GPIO)
);
endmodule

3
rtl/wb/wb_gpio.v
View File

@@ -8,6 +8,7 @@ module wb_gpio #(
input wire [3:0] i_wb_sel, input wire [3:0] i_wb_sel,
input wire i_wb_we, input wire i_wb_we,
input wire i_wb_stb, input wire i_wb_stb,
input wire [31:0] i_gpio,
output reg [31:0] o_wb_rdt, output reg [31:0] o_wb_rdt,
output reg o_wb_ack, output reg o_wb_ack,
@@ -34,7 +35,7 @@ module wb_gpio #(
if (i_wb_rst) begin if (i_wb_rst) begin
o_wb_rdt <= 32'h0; o_wb_rdt <= 32'h0;
end else if (i_wb_stb && !i_wb_we) begin end else if (i_wb_stb && !i_wb_we) begin
o_wb_rdt <= o_gpio; o_wb_rdt <= i_gpio;
end end
end end

63
rtl/wb/wb_gpio_banks.v Normal file
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@@ -0,0 +1,63 @@
`default_nettype none
module wb_gpio_banks #(
parameter integer NUM_BANKS = 4,
parameter [31:0] BASE_ADDR = 32'h8000_0000
) (
input wire i_wb_clk,
input wire i_wb_rst,
input wire [31:0] i_wb_adr,
input wire [31:0] i_wb_dat,
input wire [3:0] i_wb_sel,
input wire i_wb_we,
input wire i_wb_stb,
input wire [NUM_BANKS*32-1:0] i_gpio,
output reg [31:0] o_wb_rdt,
output reg o_wb_ack,
output wire [NUM_BANKS*32-1:0] o_gpio
);
wire [NUM_BANKS-1:0] bank_sel;
wire [NUM_BANKS-1:0] bank_stb;
wire [NUM_BANKS*32-1:0] bank_rdt;
wire [NUM_BANKS-1:0] bank_ack;
genvar gi;
generate
for (gi = 0; gi < NUM_BANKS; gi = gi + 1) begin : gen_gpio
localparam [31:0] BANK_ADDR = BASE_ADDR + (gi * 4);
assign bank_sel[gi] = (i_wb_adr == BANK_ADDR);
assign bank_stb[gi] = i_wb_stb & bank_sel[gi];
wb_gpio #(
.address(BANK_ADDR)
) u_gpio (
.i_wb_clk(i_wb_clk),
.i_wb_rst(i_wb_rst),
.i_wb_adr(i_wb_adr),
.i_wb_dat(i_wb_dat),
.i_wb_sel(i_wb_sel),
.i_wb_we(i_wb_we),
.i_wb_stb(bank_stb[gi]),
.i_gpio(i_gpio[gi*32 +: 32]),
.o_wb_rdt(bank_rdt[gi*32 +: 32]),
.o_wb_ack(bank_ack[gi]),
.o_gpio(o_gpio[gi*32 +: 32])
);
end
endgenerate
integer bi;
always @* begin
o_wb_rdt = 32'h0000_0000;
o_wb_ack = 1'b0;
for (bi = 0; bi < NUM_BANKS; bi = bi + 1) begin
if (bank_sel[bi]) begin
o_wb_rdt = bank_rdt[bi*32 +: 32];
o_wb_ack = bank_ack[bi];
end
end
end
endmodule

5
scripts/planahead.sh
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@@ -1,4 +1,5 @@
#!/bin/bash #!/bin/bash
cd build cd build
. /opt/packages/xilinx/ISE/14.7/ISE_DS/settings64.sh . /opt/Xilinx/14.7/ISE_DS/settings64.sh
planAhead -mode gui -source ../scripts/planahead.tcl Xephyr :1 -screen 1600x900 &
DISPLAY=:1 planAhead -mode batch -source ../scripts/planahead.tcl

1
scripts/planahead.tcl
View File

@@ -5,3 +5,4 @@ import_files -force -norecurse
import_files -fileset constrs_1 -force -norecurse ../boards/mimas_v1/constraints.ucf import_files -fileset constrs_1 -force -norecurse ../boards/mimas_v1/constraints.ucf
import_as_run -run impl_1 -twx ../out/synth/timing.twx ../out/synth/synth.ncd import_as_run -run impl_1 -twx ../out/synth/timing.twx ../out/synth/synth.ncd
open_run impl_1 open_run impl_1
start_gui

1
sim/tb/tb_serving.v
View File

@@ -58,6 +58,7 @@ module tb_serving();
.i_wb_we(wb_we), .i_wb_we(wb_we),
.i_wb_stb(wb_stb), .i_wb_stb(wb_stb),
.i_wb_sel(wb_sel), .i_wb_sel(wb_sel),
.i_gpio(GPIO),
.o_wb_rdt(wb_rdt), .o_wb_rdt(wb_rdt),
.o_wb_ack(wb_ack), .o_wb_ack(wb_ack),
.o_gpio(GPIO) .o_gpio(GPIO)

11
sw/blinky/blinky.c
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@@ -1,8 +1,10 @@
#include <stdint.h> #include <stdint.h>
#define GPIO_BASE 0x40000000u #define GPIO_BASE 0x40000000u
#define VOUT_BASE 0x40000004u
static volatile uint32_t * const gpio = (volatile uint32_t *)GPIO_BASE; static volatile uint32_t * const gpio = (volatile uint32_t *)GPIO_BASE;
static volatile uint32_t * const vout = (volatile uint32_t *)VOUT_BASE;
static void delay(volatile uint32_t ticks){ static void delay(volatile uint32_t ticks){
while (ticks--) { while (ticks--) {
@@ -15,8 +17,11 @@ int main(void)
uint32_t v = 0; uint32_t v = 0;
for (;;) { for (;;) {
*gpio = v; for(int i=0; i<1000; i++){
v++; *vout = v;
delay(20000u); v++;
delay(5u);
}
*gpio ^= 0xffffffff;
} }
} }

56
sw/sweep/Makefile Normal file
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@@ -0,0 +1,56 @@
TOOLCHAIN_PREFIX ?= riscv64-elf-
CC := $(TOOLCHAIN_PREFIX)gcc
OBJCOPY := $(TOOLCHAIN_PREFIX)objcopy
OBJDUMP := $(TOOLCHAIN_PREFIX)objdump
SIZE := $(TOOLCHAIN_PREFIX)size
TARGET := sweep
SRCS_C := sweep.c
SRCS_S := start.s
OBJS := $(SRCS_C:.c=.o) $(SRCS_S:.s=.o)
ARCH_FLAGS := -march=rv32i_zicsr -mabi=ilp32
CFLAGS := $(ARCH_FLAGS) -Os -ffreestanding -fno-builtin -Wall -Wextra
ASFLAGS := $(ARCH_FLAGS)
LDFLAGS := $(ARCH_FLAGS) -nostdlib -nostartfiles -Wl,-Bstatic,-Tlink.ld,--gc-sections,-Map,$(TARGET).map
HEX_TO_COE := ../../scripts/hex_to_coe.py
HEX_TO_MIF := ../../scripts/hex_to_mif.py
.PHONY: all clean disasm size
all: $(TARGET).elf $(TARGET).bin $(TARGET).hex $(TARGET).coe $(TARGET).mif $(TARGET).elf.asm
$(TARGET).elf: $(OBJS) link.ld
$(CC) $(LDFLAGS) -o $@ $(OBJS)
%.o: %.c
$(CC) $(CFLAGS) -c -o $@ $<
%.o: %.s
$(CC) $(ASFLAGS) -c -o $@ $<
$(TARGET).bin: $(TARGET).elf
$(OBJCOPY) -O binary $< $@
$(TARGET).hex: $(TARGET).bin
hexdump -v -e '1/1 "%02x\n"' $< > $@
$(TARGET).coe: $(TARGET).hex
$(HEX_TO_COE) $< $@
$(TARGET).mif: $(TARGET).hex
$(HEX_TO_MIF) $< $@
$(TARGET).elf.asm: $(TARGET).elf
$(OBJDUMP) -d -S $< > $@
disasm: $(TARGET).elf.asm
size: $(TARGET).elf
$(SIZE) $<
clean:
rm -f $(TARGET).elf $(TARGET).bin $(TARGET).hex $(TARGET).coe $(TARGET).mif \
$(TARGET).elf.asm $(TARGET).map $(OBJS)

33
sw/sweep/link.ld Normal file
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@@ -0,0 +1,33 @@
OUTPUT_ARCH("riscv")
ENTRY(_start)
MEMORY
{
RAM (rwx) : ORIGIN = 0x00000000, LENGTH = 8K
}
SECTIONS
{
.text :
{
KEEP(*(.text.init))
*(.text .text.*)
*(.rodata .rodata.*)
} > RAM
.data :
{
*(.data .data.*)
} > RAM
.bss (NOLOAD) :
{
__bss_start = .;
*(.bss .bss.*)
*(COMMON)
__bss_end = .;
} > RAM
. = ALIGN(4);
__stack_top = ORIGIN(RAM) + LENGTH(RAM);
}

23
sw/sweep/start.s Normal file
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@@ -0,0 +1,23 @@
.section .text.init
.globl _start
.type _start, @function
_start:
la sp, __stack_top
# Zero .bss
la t0, __bss_start
la t1, __bss_end
1:
bgeu t0, t1, 2f
sw zero, 0(t0)
addi t0, t0, 4
j 1b
2:
call main
3:
j 3b
.size _start, .-_start

14
sw/sweep/sweep.c Normal file
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@@ -0,0 +1,14 @@
#include <stdint.h>
#define GPIO_BASE 0x40000000u
static volatile uint32_t * const R_FREQ = (volatile uint32_t *)GPIO_BASE;
void main(){
for(;;){
for(int i=1000; i<10000; i++){
*R_FREQ = i;
for(int j=0; j<100; j++) asm volatile("nop");
}
}
}