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library/common/up_adc_common: Sync adc_rst to control set 

De-assert adc_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 2020-05-06 10:19:40 +01:00 committed by Laszlo Nagy
parent 75c037fcca
commit 32be451b98
1 changed files with 17 additions and 7 deletions
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24
library/common/up_adc_common.v
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@ -154,6 +154,9 @@ module up_adc_common #(
wire up_drp_rwn_s;
wire [31:0] up_drp_rdata_hold_s;
wire adc_rst_n;
wire adc_rst_s;
// decode block select
assign up_wreq_s = (up_waddr[13:7] == {COMMON_ID,1'b0}) ? up_wreq : 1'b0;
@ -419,11 +422,11 @@ module up_adc_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(adc_clk), .rstn(), .rst(adc_rst));
ad_rst i_core_rst_reg (.rst_async(up_core_preset), .clk(adc_clk), .rstn(), .rst(adc_rst_s));
// adc control & status
up_xfer_cntrl #(.DATA_WIDTH(43)) i_xfer_cntrl (
up_xfer_cntrl #(.DATA_WIDTH(44)) i_xfer_cntrl (
.up_rstn (up_rstn),
.up_clk (up_clk),
.up_data_cntrl ({ up_adc_sdr_ddr_n,
@ -433,9 +436,10 @@ module up_adc_common #(
up_adc_start_code,
up_adc_r1_mode,
up_adc_ddr_edgesel,
up_adc_pin_mode}),
up_adc_pin_mode,
up_resetn}),
.up_xfer_done (up_cntrl_xfer_done_s),
.d_rst (adc_rst),
.d_rst (adc_rst_s),
.d_clk (adc_clk),
.d_data_cntrl ({ adc_sdr_ddr_n,
adc_num_lanes,
@ -444,7 +448,13 @@ module up_adc_common #(
adc_start_code,
adc_r1_mode,
adc_ddr_edgesel,
adc_pin_mode}));
adc_pin_mode,
adc_rst_n}));
// De-assert adc_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 adc_rst = ~adc_rst_n;
up_xfer_status #(.DATA_WIDTH(3)) i_xfer_status (
.up_rstn (up_rstn),
@ -452,7 +462,7 @@ module up_adc_common #(
.up_data_status ({up_sync_status_s,
up_status_s,
up_status_ovf_s}),
.d_rst (adc_rst),
.d_rst (adc_rst_s),
.d_clk (adc_clk),
.d_data_status ({ adc_sync_status,
adc_status,
@ -464,7 +474,7 @@ module up_adc_common #(
.up_rstn (up_rstn),
.up_clk (up_clk),
.up_d_count (up_adc_clk_count_s),
.d_rst (adc_rst),
.d_rst (adc_rst_s),
.d_clk (adc_clk));
endmodule