gateware: Rework the low-level line state monitoring ticks
The 'tick' system was meant to allow the firmware to monitor the
low level state of the line, beyong just "not aligned", but it was
never really useful in the present state.
Now we have more tick source available (but only one can be measured
at the same time). More specifically, the firmware can monitor the
presence/absence of raw pulses (LOS condition), it can also monitor
the number of '1' pulses to detect an AIS signals, or simply the rate
of RX pulses (to tune the local oscillator to incoming signal rate).
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: I31fa8a717a26643f1b6ca5644bee1d8c41a2512e
diff --git a/gateware/common/rtl/soc_base.v b/gateware/common/rtl/soc_base.v
index 25c4af8..be7766a 100644
--- a/gateware/common/rtl/soc_base.v
+++ b/gateware/common/rtl/soc_base.v
@@ -72,9 +72,8 @@
input wire [ WB_N -1:0] wb_m_ack,
// Ticks
- output wire [E1_N-1:0] tick_e1_rx,
- output wire [E1_N-1:0] tick_e1_tx,
- output wire tick_usb_sof,
+ output wire [4*E1_N-1:0] tick_e1,
+ output wire tick_usb_sof,
// Clock / Reset
input wire clk_sys,
@@ -502,8 +501,7 @@
.wb_cyc (wb_cyc[7]),
.wb_ack (wb_ack[7]),
.irq (),
- .tick_rx (tick_e1_rx),
- .tick_tx (tick_e1_tx),
+ .mon_tick (tick_e1),
.clk (clk_sys),
.rst (rst_sys)
);
diff --git a/gateware/cores/no2e1 b/gateware/cores/no2e1
index 344a8e9..dac3a8b 160000
--- a/gateware/cores/no2e1
+++ b/gateware/cores/no2e1
@@ -1 +1 @@
-Subproject commit 344a8e9ec36dc27e9694abc7b3afd8f6b5bcbaba
+Subproject commit dac3a8b7a5d8736d867edc48a65a41965d8b78d1
diff --git a/gateware/e1-tracer/doc/mem-map.md b/gateware/e1-tracer/doc/mem-map.md
index 06cfad0..aa79948 100644
--- a/gateware/e1-tracer/doc/mem-map.md
+++ b/gateware/e1-tracer/doc/mem-map.md
@@ -156,21 +156,43 @@
Write to this register with bit 2 set will trigger a FPGA reload of the selected image.
-#### E1 tick channel 0/1 (Read Only, addr `0x04` / `0x05`)
+#### E1 tick source select (Write Only, addr `0x04`)
```text
,-----------------------------------------------------------------------------------------------,
|31|30|29|28|27|26|25|24|23|22|21|20|19|18|17|16|15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
|-----------------------------------------------------------------------------------------------|
-| / | rx_tick |
+| / |ts[1]| / |ts[0]|
'-----------------------------------------------------------------------------------------------'
- * [15:0] - rx_tick
+ * [17:16] - ts[1] : Tick Source for channel 1
+ * [ 1: 0] - ts[0] : Tick Source for channel 0
```
-An internal counter is incremented at every bit received by the corresponding E1 channel. That
-counter value is then captured at every USB Start-of-Frame packet and the last captured value
-made available here.
+Selects the tick source for the counters below for each E1 channel.
+Available sources are :
+
+* `0`: (reserved)
+* `1`: (reserved)
+* `2`: RX Sample, for every bit received
+* `3`: RX One, for every `1` bit received
+
+#### E1 tick counters (Read Only, addr `0x04`)
+
+```text
+,-----------------------------------------------------------------------------------------------,
+|31|30|29|28|27|26|25|24|23|22|21|20|19|18|17|16|15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
+|-----------------------------------------------------------------------------------------------|
+| chan[1] | chan[0] |
+'-----------------------------------------------------------------------------------------------'
+
+ * [31:16] - chan[1] : Tick counter for channel 1
+ * [15: 0] - chan[0] : Tick counter for channel 0
+```
+
+An internal counter is incremented at every E1 tick (tick source selected above) for each E1
+channel. That counter value is then captured at every USB Start-of-Frame packet and the last
+captured value made available here.
#### Time (Read Only, addr `0x07`)
diff --git a/gateware/e1-tracer/rtl/misc.v b/gateware/e1-tracer/rtl/misc.v
index e39a787..5d1c1f4 100644
--- a/gateware/e1-tracer/rtl/misc.v
+++ b/gateware/e1-tracer/rtl/misc.v
@@ -16,7 +16,7 @@
input wire btn,
// Ticks
- input wire [1:0] tick_e1_rx,
+ input wire [7:0] tick_e1,
input wire tick_usb_sof,
// Reset request
@@ -43,9 +43,13 @@
// Bus
wire bus_clr;
reg bus_we_boot;
+ reg bus_we_tick_sel;
// Counters
- wire [15:0] cap_e1_rx[0:1];
+ reg [1:0] tick_e1_sel[0:1];
+ wire [1:0] tick_e1_mux;
+
+ wire [15:0] cap_e1[0:1];
wire [31:0] cnt_time;
// Boot
@@ -64,10 +68,13 @@
// Write enables
always @(posedge clk)
- if (bus_clr | ~wb_we)
- bus_we_boot <= 1'b0;
- else
- bus_we_boot <= wb_addr == 4'h0;
+ if (bus_clr | ~wb_we) begin
+ bus_we_boot <= 1'b0;
+ bus_we_tick_sel <= 1'b0;
+ end else begin
+ bus_we_boot <= wb_addr == 4'h0;
+ bus_we_tick_sel <= wb_addr == 4'h4;
+ end
// Read mux
always @(posedge clk)
@@ -75,8 +82,7 @@
wb_rdata <= 32'h00000000;
else
case (wb_addr[3:0])
- 4'h4: wb_rdata <= { 16'h000, cap_e1_rx[0] };
- 4'h5: wb_rdata <= { 16'h000, cap_e1_rx[1] };
+ 4'h4: wb_rdata <= { cap_e1[1], cap_e1[0] };
4'h7: wb_rdata <= cnt_time;
default: wb_rdata <= 32'hxxxxxxxx;
endcase
@@ -86,12 +92,21 @@
// --------
// E1 ticks
+ always @(posedge clk)
+ if (bus_we_tick_sel) begin
+ tick_e1_sel[1] <= wb_wdata[17:16];
+ tick_e1_sel[0] <= wb_wdata[ 1: 0];
+ end
+
+ assign tick_e1_mux[0] = tick_e1[{1'b0, tick_e1_sel[0]}];
+ assign tick_e1_mux[1] = tick_e1[{1'b1, tick_e1_sel[1]}];
+
capcnt #(
.W(16)
) e1_cnt_I[1:0] (
.cnt_cur (),
- .cnt_cap ({cap_e1_rx[1], cap_e1_rx[0] }),
- .inc ({tick_e1_rx[1], tick_e1_rx[0]}),
+ .cnt_cap ({ cap_e1[1], cap_e1[0] }),
+ .inc ({ tick_e1_mux[1], tick_e1_mux[0] }),
.cap (tick_usb_sof),
.clk (clk),
.rst (rst)
diff --git a/gateware/e1-tracer/rtl/top.v b/gateware/e1-tracer/rtl/top.v
index 0e76c5a..8e1d67b 100644
--- a/gateware/e1-tracer/rtl/top.v
+++ b/gateware/e1-tracer/rtl/top.v
@@ -80,7 +80,7 @@
wire [(WB_N*32)-1:0] wb_rdata_flat;
// Ticks
- wire [1:0] tick_e1_rx;
+ wire [7:0] tick_e1;
wire tick_usb_sof;
// Clocks / Reset
@@ -136,7 +136,7 @@
.wb_m_we (wb_we),
.wb_m_cyc (wb_cyc),
.wb_m_ack (wb_ack),
- .tick_e1_rx (tick_e1_rx),
+ .tick_e1 (tick_e1),
.tick_usb_sof (tick_usb_sof),
.clk_sys (clk_sys),
.rst_sys (rst_sys),
@@ -167,7 +167,7 @@
misc misc_I (
.btn (btn),
- .tick_e1_rx (tick_e1_rx),
+ .tick_e1 (tick_e1),
.tick_usb_sof (tick_usb_sof),
.rst_req (rst_req),
.wb_addr (wb_addr[7:0]),
diff --git a/gateware/icE1usb-proto/doc/mem-map.md b/gateware/icE1usb-proto/doc/mem-map.md
index d8f9cba..b326619 100644
--- a/gateware/icE1usb-proto/doc/mem-map.md
+++ b/gateware/icE1usb-proto/doc/mem-map.md
@@ -156,20 +156,39 @@
Write to this register with bit 2 set will trigger a FPGA reload of the selected image.
-#### E1 tick channel 0 (Read Only, addr `0x04`)
+#### E1 tick source select (Write Only, addr `0x04`)
```text
,-----------------------------------------------------------------------------------------------,
|31|30|29|28|27|26|25|24|23|22|21|20|19|18|17|16|15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
|-----------------------------------------------------------------------------------------------|
-| tx_tick | rx_tick |
+| / | tss |
'-----------------------------------------------------------------------------------------------'
- * [31:16] - tx_tick
- * [15: 0] - rx_tick
+ * [ 1: 0] - tss : Tick Source Select
```
-An internal counter is incremented at every bit received/transmitted by the corresponding E1
+Selects the tick source for the counters below.
+Available sources are :
+
+* `0`: TX tick, for every bit sent
+* `1`: RX Pulse, for every detected pulse on the input
+* `2`: RX Sample, for every bit received
+* `3`: RX One, for every `1` bit received
+
+#### E1 tick counters (Read Only, addr `0x04`)
+
+```text
+,-----------------------------------------------------------------------------------------------,
+|31|30|29|28|27|26|25|24|23|22|21|20|19|18|17|16|15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
+|-----------------------------------------------------------------------------------------------|
+| / | tick_cnt |
+'-----------------------------------------------------------------------------------------------'
+
+ * [15: 0] - tick_cnt : Tick counter value
+```
+
+An internal counter is incremented at every E1 tick (tick source selected above) for each E1
channel. That counter value is then captured at every USB Start-of-Frame packet and the last
captured value made available here.
diff --git a/gateware/icE1usb-proto/rtl/misc.v b/gateware/icE1usb-proto/rtl/misc.v
index 8ff14d9..68ac624 100644
--- a/gateware/icE1usb-proto/rtl/misc.v
+++ b/gateware/icE1usb-proto/rtl/misc.v
@@ -26,9 +26,8 @@
input wire btn,
// Ticks
- input wire tick_e1_rx,
- input wire tick_e1_tx,
- input wire tick_usb_sof,
+ input wire [3:0] tick_e1,
+ input wire tick_usb_sof,
// Reset request
output wire rst_req,
@@ -52,12 +51,15 @@
// Bus
wire bus_clr;
reg bus_we_boot;
+ reg bus_we_tick_sel;
reg [ 1:0] bus_we_pdm_clk;
reg [ 2:0] bus_we_pdm_e1;
// Counters
- wire [15:0] cap_e1_rx;
- wire [15:0] cap_e1_tx;
+ reg [1:0] tick_e1_sel;
+ wire tick_e1_mux;
+
+ wire [15:0] cap_e1;
wire [31:0] cnt_time;
// PDM
@@ -82,6 +84,7 @@
always @(posedge clk)
if (bus_clr | ~wb_we) begin
bus_we_boot <= 1'b0;
+ bus_we_tick_sel <= 1'b0;
bus_we_pdm_clk[0] <= 1'b0;
bus_we_pdm_clk[1] <= 1'b0;
bus_we_pdm_e1[0] <= 1'b0;
@@ -89,6 +92,7 @@
bus_we_pdm_e1[2] <= 1'b0;
end else begin
bus_we_boot <= wb_addr == 4'h0;
+ bus_we_tick_sel <= wb_addr == 4'h4;
bus_we_pdm_clk[0] <= wb_addr == 4'h8;
bus_we_pdm_clk[1] <= wb_addr == 4'h9;
bus_we_pdm_e1[0] <= wb_addr == 4'ha;
@@ -102,7 +106,7 @@
wb_rdata <= 32'h00000000;
else
case (wb_addr[3:0])
- 4'h4: wb_rdata <= { cap_e1_tx, cap_e1_rx };
+ 4'h4: wb_rdata <= { 16'h0000, cap_e1 };
4'h7: wb_rdata <= cnt_time;
`ifdef WITH_PDM_READBACK
4'h8: wb_rdata <= { pdm_clk[0][12], 19'h00000, pdm_clk[0][11:0] };
@@ -119,12 +123,18 @@
// --------
// E1 ticks
+ always @(posedge clk)
+ if (bus_we_tick_sel)
+ tick_e1_sel <= wb_wdata[1:0];
+
+ assign tick_e1_mux = tick_e1[tick_e1_sel];
+
capcnt #(
.W(16)
- ) e1_cnt_I[1:0] (
+ ) e1_cnt_I (
.cnt_cur (),
- .cnt_cap ({cap_e1_tx, cap_e1_rx }),
- .inc ({tick_e1_tx, tick_e1_rx}),
+ .cnt_cap (cap_e1),
+ .inc (tick_e1_mux),
.cap (tick_usb_sof),
.clk (clk),
.rst (rst)
diff --git a/gateware/icE1usb-proto/rtl/top.v b/gateware/icE1usb-proto/rtl/top.v
index 7cefeac..40eaf5c 100644
--- a/gateware/icE1usb-proto/rtl/top.v
+++ b/gateware/icE1usb-proto/rtl/top.v
@@ -78,8 +78,7 @@
wire [(WB_N*32)-1:0] wb_rdata_flat;
// Ticks
- wire tick_e1_rx;
- wire tick_e1_tx;
+ wire [3:0] tick_e1;
wire tick_usb_sof;
// Clocks / Reset
@@ -135,8 +134,7 @@
.wb_m_we (wb_we),
.wb_m_cyc (wb_cyc),
.wb_m_ack (wb_ack),
- .tick_e1_rx (tick_e1_rx),
- .tick_e1_tx (tick_e1_tx),
+ .tick_e1 (tick_e1),
.tick_usb_sof (tick_usb_sof),
.clk_sys (clk_sys),
.rst_sys (rst_sys),
@@ -172,8 +170,7 @@
.clk_tune_hi (clk_tune_hi),
.clk_tune_lo (clk_tune_lo),
.btn (btn),
- .tick_e1_rx (tick_e1_rx),
- .tick_e1_tx (tick_e1_tx),
+ .tick_e1 (tick_e1),
.tick_usb_sof (tick_usb_sof),
.rst_req (rst_req),
.wb_addr (wb_addr[7:0]),
diff --git a/gateware/icE1usb/doc/mem-map.md b/gateware/icE1usb/doc/mem-map.md
index 75d7b69..395a577 100644
--- a/gateware/icE1usb/doc/mem-map.md
+++ b/gateware/icE1usb/doc/mem-map.md
@@ -206,20 +206,41 @@
* `10`: Slow blink
* `11`: Fast blink
-#### E1 tick channel 0/1 (Read Only, addr `0x04-0x05`)
+#### E1 tick source select (Write Only, addr `0x04`)
```text
,-----------------------------------------------------------------------------------------------,
|31|30|29|28|27|26|25|24|23|22|21|20|19|18|17|16|15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
|-----------------------------------------------------------------------------------------------|
-| tx_tick | rx_tick |
+| / |ts[1]| / |ts[0]|
'-----------------------------------------------------------------------------------------------'
- * [31:16] - tx_tick
- * [15: 0] - rx_tick
+ * [17:16] - ts[1] : Tick Source for channel 1
+ * [ 1: 0] - ts[0] : Tick Source for channel 0
```
-An internal counter is incremented at every bit received/transmitted by the corresponding E1
+Selects the tick source for the counters below for each E1 channel.
+Available sources are :
+
+* `0`: TX tick, for every bit sent
+* `1`: RX Pulse, for every detected pulse on the input
+* `2`: RX Sample, for every bit received
+* `3`: RX One, for every `1` bit received
+
+#### E1 tick counters (Read Only, addr `0x04`)
+
+```text
+,-----------------------------------------------------------------------------------------------,
+|31|30|29|28|27|26|25|24|23|22|21|20|19|18|17|16|15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
+|-----------------------------------------------------------------------------------------------|
+| chan[1] | chan[0] |
+'-----------------------------------------------------------------------------------------------'
+
+ * [31:16] - chan[1] : Tick counter for channel 1
+ * [15: 0] - chan[0] : Tick counter for channel 0
+```
+
+An internal counter is incremented at every E1 tick (tick source selected above) for each E1
channel. That counter value is then captured at every USB Start-of-Frame packet and the last
captured value made available here.
diff --git a/gateware/icE1usb/rtl/misc.v b/gateware/icE1usb/rtl/misc.v
index 7aaa068..347412c 100644
--- a/gateware/icE1usb/rtl/misc.v
+++ b/gateware/icE1usb/rtl/misc.v
@@ -37,8 +37,7 @@
input wire btn_stb,
// Ticks
- input wire [ 1:0] tick_e1_rx,
- input wire [ 1:0] tick_e1_tx,
+ input wire [ 7:0] tick_e1,
input wire tick_usb_sof,
// Reset request
@@ -67,6 +66,7 @@
reg bus_we_boot;
reg bus_we_gpio;
reg bus_we_led;
+ reg bus_we_tick_sel;
reg [ 1:0] bus_we_pdm_clk;
reg [ 1:0] bus_we_pdm_e1;
@@ -83,8 +83,10 @@
wire gps_pps_r;
// Counters
- wire [15:0] cap_e1_rx[0:1];
- wire [15:0] cap_e1_tx[0:1];
+ reg [1:0] tick_e1_sel[0:1];
+ wire [1:0] tick_e1_mux;
+
+ wire [15:0] cap_e1[0:1];
wire [31:0] cap_gps;
wire [31:0] cnt_time;
@@ -112,6 +114,7 @@
bus_we_boot <= 1'b0;
bus_we_gpio <= 1'b0;
bus_we_led <= 1'b0;
+ bus_we_tick_sel <= 1'b0;
bus_we_pdm_clk[0] <= 1'b0;
bus_we_pdm_clk[1] <= 1'b0;
bus_we_pdm_e1[0] <= 1'b0;
@@ -120,6 +123,7 @@
bus_we_boot <= wb_addr == 4'h0;
bus_we_gpio <= wb_addr == 4'h1;
bus_we_led <= wb_addr == 4'h2;
+ bus_we_tick_sel <= wb_addr == 4'h4;
bus_we_pdm_clk[0] <= wb_addr == 4'h8;
bus_we_pdm_clk[1] <= wb_addr == 4'h9;
bus_we_pdm_e1[0] <= wb_addr == 4'ha;
@@ -134,8 +138,7 @@
case (wb_addr[3:0])
4'h1: wb_rdata <= { 12'h000, gpio_in, 4'h0, gpio_oe, 4'h0, gpio_out };
4'h2: wb_rdata <= { 22'h000000, e1_led_active, e1_led };
- 4'h4: wb_rdata <= { cap_e1_tx[0], cap_e1_rx[0] };
- 4'h5: wb_rdata <= { cap_e1_tx[1], cap_e1_rx[1] };
+ 4'h4: wb_rdata <= { cap_e1[1], cap_e1[0] };
4'h6: wb_rdata <= cap_gps;
4'h7: wb_rdata <= cnt_time;
`ifdef WITH_PDM_READBACK
@@ -229,12 +232,21 @@
// --------
// E1 ticks
+ always @(posedge clk)
+ if (bus_we_tick_sel) begin
+ tick_e1_sel[1] <= wb_wdata[17:16];
+ tick_e1_sel[0] <= wb_wdata[ 1: 0];
+ end
+
+ assign tick_e1_mux[0] = tick_e1[{1'b0, tick_e1_sel[0]}];
+ assign tick_e1_mux[1] = tick_e1[{1'b1, tick_e1_sel[1]}];
+
capcnt #(
.W(16)
- ) e1_cnt_I[3:0] (
+ ) e1_cnt_I[1:0] (
.cnt_cur (),
- .cnt_cap ({cap_e1_tx[1], cap_e1_rx[1], cap_e1_tx[0], cap_e1_rx[0] }),
- .inc ({tick_e1_tx[1], tick_e1_rx[1], tick_e1_tx[0], tick_e1_rx[0]}),
+ .cnt_cap ({ cap_e1[1], cap_e1[0] }),
+ .inc ({ tick_e1_mux[1], tick_e1_mux[0] }),
.cap (tick_usb_sof),
.clk (clk),
.rst (rst)
diff --git a/gateware/icE1usb/rtl/top.v b/gateware/icE1usb/rtl/top.v
index a2b8979..472c1ff 100644
--- a/gateware/icE1usb/rtl/top.v
+++ b/gateware/icE1usb/rtl/top.v
@@ -99,8 +99,7 @@
wire [(WB_N*32)-1:0] wb_rdata_flat;
// Ticks
- wire [1:0] tick_e1_rx;
- wire [1:0] tick_e1_tx;
+ wire [7:0] tick_e1;
wire tick_usb_sof;
// I2C
@@ -182,8 +181,7 @@
.wb_m_we (wb_we),
.wb_m_cyc (wb_cyc),
.wb_m_ack (wb_ack),
- .tick_e1_rx (tick_e1_rx),
- .tick_e1_tx (tick_e1_tx),
+ .tick_e1 (tick_e1),
.tick_usb_sof (tick_usb_sof),
.clk_sys (clk_sys),
.rst_sys (rst_sys),
@@ -255,8 +253,7 @@
.e1_led_active (e1_led_active),
.btn_val (btn_val),
.btn_stb (btn_stb),
- .tick_e1_rx (tick_e1_rx),
- .tick_e1_tx (tick_e1_tx),
+ .tick_e1 (tick_e1),
.tick_usb_sof (tick_usb_sof),
.rst_req (rst_req),
.wb_addr (wb_addr[7:0]),