From 59b6efce7ebedc793b17fb9af623590d741dbe11 Mon Sep 17 00:00:00 2001
From: Peter McGoron <code@mcgoron.com>
Date: Sat, 26 Nov 2022 12:00:10 -0500
Subject: [PATCH] raster_sim.v: add and lint

---
 firmware/rtl/raster/raster.v     |   5 +-
 firmware/rtl/raster/raster_sim.v | 134 +++++++++++++++++++++++++++++++
 2 files changed, 135 insertions(+), 4 deletions(-)
 create mode 100644 firmware/rtl/raster/raster_sim.v

diff --git a/firmware/rtl/raster/raster.v b/firmware/rtl/raster/raster.v
index 6f1e1e5..b8d76ca 100644
--- a/firmware/rtl/raster/raster.v
+++ b/firmware/rtl/raster/raster.v
@@ -168,9 +168,6 @@ end endgenerate
 always @ (posedge clk) begin
 	case (state)
 	WAIT_ON_ARM: begin if (arm) begin
-		if (adc_used_in != 0) begin
-			state <= REQUEST_DAC_VALUES;
-		end
 		adc_used <= adc_used_in;
 		dx <= dx_in;
 		dy <= dy_in;
@@ -221,7 +218,7 @@ always @ (posedge clk) begin
 	end
 
 	WAIT_ADVANCE: begin
-		if (counter < settle_time_in) begin
+		if (counter < settle_time) begin
 			if (!arm) state <= WAIT_ON_ARM;
 			counter <= counter + 1;
 		end else begin
diff --git a/firmware/rtl/raster/raster_sim.v b/firmware/rtl/raster/raster_sim.v
new file mode 100644
index 0000000..6004428
--- /dev/null
+++ b/firmware/rtl/raster/raster_sim.v
@@ -0,0 +1,134 @@
+module raster_sim #(
+	parameter SAMPLEWID = 9,
+	parameter DAC_DATA_WID = 20,
+	parameter DAC_WID = 24,
+	parameter DAC_WAIT_BETWEEN_CMD = 10,
+	parameter TIMER_WID = 4,
+	parameter STEPWID = 16,
+	parameter ADCNUM = 9,
+	parameter MAX_ADC_DATA_WID = 24,
+
+	parameter BASE_ADDR = 32'h1000000,
+	parameter MAX_BYTE_WID = 13,
+	parameter DAT_WID = 24,
+	parameter RAM_WORD = 16,
+	parameter RAM_WID = 32
+) (
+	input clk,
+	input arm,
+	output reg finished,
+	output reg running,
+
+	/* Amount of steps per sample. */
+	input [STEPWID-1:0] steps_per_sample_in,
+	/* Amount of samples in one line (forward) */
+	input [SAMPLEWID-1:0] max_samples_in,
+	/* Amount of lines in the output. */
+	input [SAMPLEWID-1:0] max_lines_in,
+	/* Wait time after each step. */
+	input [TIMER_WID-1:0] settle_time_in,
+
+	/* Each step goes (x,y) -> (x + dx, y + dy) forward for each line of
+	 * the output. */
+	input signed [DAC_DATA_WID-1:0] dx_in,
+	input signed [DAC_DATA_WID-1:0] dy_in,
+
+	/* Vertical steps to go to the next line. */
+	input signed [DAC_DATA_WID-1:0] dx_vert_in,
+	input signed [DAC_DATA_WID-1:0] dy_vert_in,
+
+	/* X and Y DAC piezos */
+	output x_arm,
+	output [DAC_WID-1:0] x_to_dac,
+	/* verilator lint_off UNUSED */
+	input [DAC_WID-1:0] x_from_dac,
+	input x_finished,
+
+	output y_arm,
+	output [DAC_WID-1:0] y_to_dac,
+	/* verilator lint_off UNUSED */
+	input [DAC_WID-1:0] y_from_dac,
+	input y_finished,
+
+	/* Connections to all possible ADCs. These are connected to SPI masters
+	 * and they will automatically extend ADC value lengths to their highest
+	 * values. */
+	output reg [ADCNUM-1:0] adc_arm,
+	input [MAX_ADC_DATA_WID-1:0] adc_data [ADCNUM-1:0],
+	input [ADCNUM-1:0] adc_finished,
+
+	/* Bitmap for which ADCs are used. */
+	input [ADCNUM-1:0] adc_used_in,
+
+	/* DMA interface */
+	output [RAM_WORD-1:0] word,
+	output [RAM_WID-1:0] addr,
+	output ram_write,
+	input ram_valid
+);
+
+wire signed [DAT_WID-1:0] ram_data;
+wire ram_commit;
+wire ram_write_finished;
+
+ram_shim #(
+	.BASE_ADDR(BASE_ADDR),
+	.MAX_BYTE_WID(MAX_BYTE_WID),
+	.DAT_WID(DAT_WID),
+	.RAM_WORD(RAM_WORD),
+	.RAM_WID(RAM_WID)
+) ram (
+	.clk(clk),
+	.data(ram_data),
+	.commit(ram_commit),
+	.finished(ram_write_finished),
+	.word(word),
+	.addr(addr),
+	.write(ram_write),
+	.valid(ram_valid)
+);
+
+raster #(
+	.SAMPLEWID(SAMPLEWID),
+	.DAC_DATA_WID(DAC_DATA_WID),
+	.DAC_WID(DAC_WID),
+	.DAC_WAIT_BETWEEN_CMD(DAC_WAIT_BETWEEN_CMD),
+	.TIMER_WID(TIMER_WID),
+	.STEPWID(STEPWID),
+	.MAX_ADC_DATA_WID(MAX_ADC_DATA_WID)
+) raster (
+	.clk(clk),
+	.arm(arm),
+	.finished(finished),
+	.running(running),
+	.steps_per_sample_in(steps_per_sample_in),
+	.max_samples_in(max_samples_in),
+	.max_lines_in(max_lines_in),
+	.settle_time_in(settle_time_in),
+	.dx_in(dx_in),
+	.dy_in(dy_in),
+	.dx_vert_in(dx_vert_in),
+	.dy_vert_in(dy_vert_in),
+
+	.x_arm(x_arm),
+	.x_to_dac(x_to_dac),
+	.x_from_dac(x_from_dac),
+	.x_finished(x_finished),
+
+	.y_arm(y_arm),
+	.y_to_dac(y_to_dac),
+	.y_from_dac(y_from_dac),
+	.y_finished(y_finished),
+
+	.adc_arm(adc_arm),
+	.adc_data(adc_data),
+	.adc_finished(adc_finished),
+
+	.adc_used_in(adc_used_in),
+
+	.data(ram_data),
+	.mem_commit(ram_commit),
+	.mem_finished(ram_write_finished)
+);
+
+endmodule