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axi_dac_interpolate: Add last sample support 

This feature will allow the user to hold(indefinitely) the last sample, from an
ongoing DMA transfer, simple or cyclic(stooped by user or trigger).

This commit also adds as functionality option:
-synchronized stop between the two channels(DMAs)
-stop by trigger
main
AndreiGrozav 2020-08-28 23:51:18 +03:00 committed by AndreiGrozav
parent d676cfd64f
commit 4f4a4208cd
3 changed files with 66 additions and 5 deletions
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23
library/axi_dac_interpolate/axi_dac_interpolate.v
View File

@ -56,6 +56,9 @@ module axi_dac_interpolate #(
input dac_enable_b,
output [15:0] dac_int_data_a,
output [15:0] dac_int_data_b,
output dac_valid_out_a,
output dac_valid_out_b,
output hold_last_sample,
output underflow,
input [ 1:0] trigger_i,
@ -130,6 +133,8 @@ module axi_dac_interpolate #(
wire [15:0] dac_correction_coefficient_b;
wire [19:0] trigger_config;
wire en_start_trigger;
wire en_stop_trigger;
wire [ 1:0] en_trigger_pins;
wire en_trigger_adc;
wire en_trigger_la;
@ -141,11 +146,15 @@ module axi_dac_interpolate #(
wire [ 1:0] fall_edge;
wire trigger_active;
wire trigger;
wire ext_trigger;
wire underflow_a;
wire underflow_b;
wire [ 1:0] lsample_hold_config;
wire sync_stop_channels;
// signal name changes
assign up_clk = s_axi_aclk;
@ -159,6 +168,8 @@ module axi_dac_interpolate #(
assign rise_edge = trigger_config[7:6];
assign fall_edge = trigger_config[9:8];
assign en_start_trigger = trigger_config[14];
assign en_stop_trigger = trigger_config[15];
assign en_trigger_pins = trigger_config[17:16];
assign en_trigger_adc = trigger_config[18];
assign en_trigger_la = trigger_config[19];
@ -195,6 +206,9 @@ module axi_dac_interpolate #(
low_level_trigger <= ~trigger_i_m3 & low_level;
end
assign hold_last_sample = lsample_hold_config[0];
assign sync_stop_channels = lsample_hold_config[1];
assign underflow = underflow_a | underflow_b;
axi_dac_interpolate_filter #(
@ -205,6 +219,8 @@ module axi_dac_interpolate #(
.dac_data (dac_data_a),
.dac_valid (dac_valid_a),
.dac_valid_out (dac_valid_out_a),
.sync_stop_channels (sync_stop_channels),
.dac_enable (dac_enable_a),
.dac_int_data (dac_int_data_a),
@ -217,6 +233,8 @@ module axi_dac_interpolate #(
.start_sync_channels (start_sync_channels),
.trigger (trigger),
.trigger_active (trigger_active),
.en_start_trigger (en_start_trigger),
.en_stop_trigger (en_stop_trigger),
.dma_valid (dma_valid_a),
.dma_valid_adjacent (dma_valid_b),
.dac_correction_enable(dac_correction_enable_a),
@ -231,6 +249,8 @@ module axi_dac_interpolate #(
.dac_data (dac_data_b),
.dac_valid (dac_valid_b),
.dac_valid_out (dac_valid_out_b),
.sync_stop_channels (sync_stop_channels),
.underflow (underflow_b),
.dac_enable (dac_enable_b),
@ -243,6 +263,8 @@ module axi_dac_interpolate #(
.start_sync_channels (start_sync_channels),
.trigger (trigger),
.trigger_active (trigger_active),
.en_start_trigger (en_start_trigger),
.en_stop_trigger (en_stop_trigger),
.dma_valid (dma_valid_b),
.dma_valid_adjacent (dma_valid_a),
.dac_correction_enable(dac_correction_enable_b),
@ -265,6 +287,7 @@ module axi_dac_interpolate #(
.dac_correction_coefficient_a(dac_correction_coefficient_a),
.dac_correction_coefficient_b(dac_correction_coefficient_b),
.trigger_config (trigger_config),
.lsample_hold_config (lsample_hold_config),
.up_rstn (up_rstn),
.up_clk (up_clk),

31
library/axi_dac_interpolate/axi_dac_interpolate_filter.v
View File

@ -49,6 +49,8 @@ module axi_dac_interpolate_filter #(
input dac_enable,
output reg [15:0] dac_int_data,
output dma_ready,
output dac_valid_out,
input sync_stop_channels,
output underflow,
input [ 2:0] filter_mask,
@ -59,6 +61,8 @@ module axi_dac_interpolate_filter #(
input start_sync_channels,
input trigger,
input trigger_active,
input en_start_trigger,
input en_stop_trigger,
input dma_valid,
input dma_valid_adjacent
);
@ -78,6 +82,8 @@ module axi_dac_interpolate_filter #(
reg filter_enable = 1'b0;
reg transfer = 1'b0;
reg [15:0] dma_valid_m = 16'd0;
reg stop_transfer = 1'd0;
wire dac_valid_corrected;
wire [15:0] dac_data_corrected;
@ -87,6 +93,9 @@ module axi_dac_interpolate_filter #(
wire dac_cic_valid;
wire [109:0] dac_cic_data;
wire dma_valid_ch_sync;
wire dma_valid_ch;
ad_iqcor #(.Q_OR_I_N (0),
.DISABLE(CORRECTION_DISABLE),
.SCALE_ONLY(1))
@ -119,6 +128,21 @@ module axi_dac_interpolate_filter #(
.filter_out (dac_cic_data),
.ce_out (dac_cic_valid));
assign dma_valid_ch_sync = sync_stop_channels ?
dma_valid & dma_valid_adjacent & !dma_transfer_suspend :
dma_valid & !dma_transfer_suspend;
assign dma_valid_ch = dma_valid_ch_sync & !stop_transfer;
always @(posedge dac_clk) begin
if (dac_rst == 1'b1) begin
dma_valid_m <= 'd0;
end else begin
dma_valid_m <= {dma_valid_m[14:0], dma_valid_ch};
end
end
assign dac_valid_out = dma_valid_m[4'h5];
always @(posedge dac_clk) begin
filter_mask_d1 <= filter_mask;
if (filter_mask_d1 != filter_mask) begin
@ -151,7 +175,7 @@ module axi_dac_interpolate_filter #(
always @(posedge dac_clk) begin
if (dma_transfer_suspend == 1'b0) begin
transfer <= trigger ? 1'b1 : transfer | !trigger_active;
transfer <= trigger ? 1'b1 : transfer | !(trigger_active & en_start_trigger);
end else begin
transfer <= 1'b0;
end
@ -162,6 +186,11 @@ module axi_dac_interpolate_filter #(
end
end
always @(posedge dac_clk) begin
stop_transfer <= !en_stop_trigger | dma_transfer_suspend ? 1'b0 :
stop_transfer | (trigger_active & trigger & transfer);
end
assign dma_ready = transmit_ready ? dac_int_ready : 1'b0;
assign underflow = dac_enable & dma_ready & ~dma_valid;

11
library/axi_dac_interpolate/axi_dac_interpolate_reg.v
View File

@ -50,6 +50,7 @@ module axi_dac_interpolate_reg(
output [15:0] dac_correction_coefficient_a,
output [15:0] dac_correction_coefficient_b,
output [19:0] trigger_config,
output [ 1:0] lsample_hold_config,
// bus interface
input up_rstn,
@ -77,6 +78,7 @@ module axi_dac_interpolate_reg(
reg [15:0] up_correction_coefficient_a = 16'h0;
reg [15:0] up_correction_coefficient_b = 16'h0;
reg [19:0] up_trigger_config = 20'h0;
reg [ 1:0] up_lsample_hold_config = 2'h0;
wire [ 1:0] flags;
@ -96,6 +98,7 @@ module axi_dac_interpolate_reg(
up_correction_coefficient_a <= 'd0;
up_correction_coefficient_b <= 'd0;
up_trigger_config <= 'd0;
up_lsample_hold_config <= 'h0;
end else begin
up_wack <= up_wreq;
if ((up_wreq == 1'b1) && (up_waddr[4:0] == 5'h1)) begin
@ -128,6 +131,9 @@ module axi_dac_interpolate_reg(
if ((up_wreq == 1'b1) && (up_waddr[4:0] == 5'h18)) begin
up_trigger_config <= up_wdata[19:0];
end
if ((up_wreq == 1'b1) && (up_waddr[4:0] == 5'h19)) begin
up_lsample_hold_config <= up_wdata[1:0];
end
end
end
@ -152,6 +158,7 @@ module axi_dac_interpolate_reg(
5'h16: up_rdata <= {16'h0,up_correction_coefficient_a};
5'h17: up_rdata <= {16'h0,up_correction_coefficient_b};
5'h18: up_rdata <= {12'h0,up_trigger_config};
5'h19: up_rdata <= {30'h0,up_lsample_hold_config};
default: up_rdata <= 0;
endcase
end else begin
@ -160,7 +167,7 @@ module axi_dac_interpolate_reg(
end
end
up_xfer_cntrl #(.DATA_WIDTH(126)) i_xfer_cntrl (
up_xfer_cntrl #(.DATA_WIDTH(128)) i_xfer_cntrl (
.up_rstn (up_rstn),
.up_clk (up_clk),
.up_data_cntrl ({ up_config[1], // 1
@ -168,6 +175,7 @@ module axi_dac_interpolate_reg(
up_correction_coefficient_b,// 16
up_correction_coefficient_a,// 16
up_trigger_config, // 20
up_lsample_hold_config, // 2
up_flags, // 2
up_interpolation_ratio_b, // 32
up_interpolation_ratio_a, // 32
@ -182,6 +190,7 @@ module axi_dac_interpolate_reg(
dac_correction_coefficient_b, // 16
dac_correction_coefficient_a, // 16
trigger_config, // 20
lsample_hold_config, // 2
flags, // 2
dac_interpolation_ratio_b, // 32
dac_interpolation_ratio_a, // 32