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library/common/up_dac_common: Sync dac_rst to control set 

De-assert dac_rst together with an updated control set.
This allows writing the control registers before releasing the reset.
This is important at start-up when stable set of controls is required.
main
Laszlo Nagy 2020-05-18 19:07:13 +01:00 committed by Laszlo Nagy
parent f886c246cd
commit 7023639b8f
1 changed files with 17 additions and 7 deletions
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24
library/common/up_dac_common.v
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@ -161,6 +161,9 @@ module up_dac_common #(
wire up_drp_rwn_s;
wire [31:0] up_drp_rdata_hold_s;
wire dac_rst_n;
wire dac_rst_s;
// decode block select
assign up_wreq_s = (up_waddr[13:7] == {COMMON_ID,1'b0}) ? up_wreq : 1'b0;
@ -425,11 +428,11 @@ module up_dac_common #(
// resets
ad_rst i_mmcm_rst_reg (.rst_async(up_mmcm_preset), .clk(up_clk), .rstn(), .rst(mmcm_rst));
ad_rst i_core_rst_reg (.rst_async(up_core_preset), .clk(dac_clk), .rstn(), .rst(dac_rst));
ad_rst i_core_rst_reg (.rst_async(up_core_preset), .clk(dac_clk), .rstn(), .rst(dac_rst_s));
// dac control & status
up_xfer_cntrl #(.DATA_WIDTH(29)) i_xfer_cntrl (
up_xfer_cntrl #(.DATA_WIDTH(30)) i_xfer_cntrl (
.up_rstn (up_rstn),
.up_clk (up_clk),
.up_data_cntrl ({ up_dac_sdr_ddr_n,
@ -441,9 +444,10 @@ module up_dac_common #(
up_dac_par_enb,
up_dac_r1_mode,
up_dac_datafmt,
up_dac_datarate}),
up_dac_datarate,
up_resetn}),
.up_xfer_done (up_xfer_done_s),
.d_rst (dac_rst),
.d_rst (dac_rst_s),
.d_clk (dac_clk),
.d_data_cntrl ({ dac_sdr_ddr_n,
dac_num_lanes,
@ -454,7 +458,13 @@ module up_dac_common #(
dac_par_enb,
dac_r1_mode,
dac_datafmt,
dac_datarate}));
dac_datarate,
dac_rst_n}));
// De-assert dac_rst together with an updated control set.
// This allows writing the control registers before releasing the reset.
// This is important at start-up when stable set of controls is required.
assign dac_rst = ~dac_rst_n;
up_xfer_status #(.DATA_WIDTH(3)) i_xfer_status (
.up_rstn (up_rstn),
@ -462,7 +472,7 @@ module up_dac_common #(
.up_data_status ({up_sync_in_status,
up_status_s,
up_status_unf_s}),
.d_rst (dac_rst),
.d_rst (dac_rst_s),
.d_clk (dac_clk),
.d_data_status ({ dac_sync_in_status,
dac_status,
@ -493,7 +503,7 @@ module up_dac_common #(
.up_rstn (up_rstn),
.up_clk (up_clk),
.up_d_count (up_dac_clk_count_s),
.d_rst (dac_rst),
.d_rst (dac_rst_s),
.d_clk (dac_clk));
endmodule