gateware: add R3.3 touch sensing support

.github/workflows/main.yml

@@ -6,8 +6,8 @@ jobs:
   ubuntu-build-icebreaker-r31:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: yosys --version
       - run: make HW_REV=HW_R31 BOARD=icebreaker CORE=mirror -C gateware
@@ -19,8 +19,8 @@ jobs:
   ubuntu-build-icebreaker-r33:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: yosys --version
       - run: make HW_REV=HW_R33 BOARD=icebreaker CORE=mirror -C gateware
@@ -29,6 +29,19 @@ jobs:
           name: ubuntu-build-icebreaker.bin
           path: gateware/build/icebreaker/top.bin
 
+  ubuntu-build-icebreaker-r33-touch:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
+      - run: git submodule update --init gateware/external/no2misc
+      - run: yosys --version
+      - run: make HW_REV=HW_R33 BOARD=icebreaker CORE=touch_cv TOUCH=TOUCH_SENSE_ENABLED -C gateware
+      - uses: actions/upload-artifact@v3
+        with:
+          name: ubuntu-build-icebreaker.bin
+          path: gateware/build/icebreaker/top.bin
+
   windows-build-icebreaker:
     runs-on: windows-latest
     defaults:
@@ -40,8 +53,8 @@ jobs:
           install: >-
             git
             make
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: |
           export PATH=$PATH:$RUNNER_TEMP/oss-cad-suite/bin
@@ -56,8 +69,8 @@ jobs:
   macos-build-icebreaker:
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: |
           yosys --version
@@ -70,8 +83,8 @@ jobs:
   ubuntu-build-colorlight-i5:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: yosys --version
       - run: make HW_REV=HW_R33 BOARD=colorlight_i5 CORE=mirror -C gateware
@@ -83,8 +96,8 @@ jobs:
   ubuntu-build-colorlight-i9:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: yosys --version
       - run: make HW_REV=HW_R33 BOARD=colorlight_i9 CORE=mirror -C gateware
@@ -96,8 +109,8 @@ jobs:
   ubuntu-build-ecpix-5:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: yosys --version
       - run: make HW_REV=HW_R33 BOARD=ecpix5 CORE=mirror -C gateware
@@ -109,8 +122,8 @@ jobs:
   ubuntu-build-pico-ice:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: yosys --version
       - run: make HW_REV=HW_R33 BOARD=pico_ice CORE=mirror -C gateware
@@ -122,17 +135,17 @@ jobs:
   run-tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: cocotb-config -v
       - run: cd gateware/sim && ./00_run.sh
 
   run-linter:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: YosysHQ/setup-oss-cad-suite@v2
+      - uses: actions/checkout@v4
+      - uses: YosysHQ/setup-oss-cad-suite@v3
       - run: git submodule update --init gateware/external/no2misc
       - run: verilator --version
       - run: cd gateware && scripts/verilator_lint.sh

gateware/Makefile

@@ -1,14 +1,17 @@
 ALL_BOARDS = $(shell ls boards)
 ALL_CORES = $(shell basename --suffix=.sv -- cores/*.sv)
 ALL_HW_REV = "HW_R31 HW_R33"
+ALL_TOUCH = "TOUCH_SENSE_DISABLED TOUCH_SENSE_ENABLED"
 
 CORE ?= mirror
+TOUCH ?= TOUCH_SENSE_DISABLED
 
 all prog:
 ifeq ($(BOARD),)
 	@echo "Valid HW_REV values are: $(ALL_HW_REV)".
 	@echo "Valid BOARD values are: $(ALL_BOARDS)".
 	@echo "Valid CORE values are: $(ALL_CORES)".
+	@echo "Valid TOUCH values are: $(ALL_TOUCH) (default disabled, valid for R3.3+ only, required for any examples that use touch)".
 	@echo "For example:"
 	@echo "  $$ make clean"
 	@echo "  $$ # Build bitstream with specific core and program it"
@@ -33,7 +36,7 @@ endif
 	mkdir -p build/$(BOARD)
 	# For now we always force a re-build since we can pass different DSP cores
 	# through environment vars and we need a re-build to happen in this case.
-	$(MAKE) -B -f boards/$(BOARD)/Makefile BUILD=build/$(BOARD) CORE=$(CORE) $(MAKECMDGOALS)
+	$(MAKE) -B -f boards/$(BOARD)/Makefile BUILD=build/$(BOARD) CORE=$(CORE) TOUCH=$(TOUCH) $(MAKECMDGOALS)
 
 clean:
 	rm -rf build/

gateware/cal/cal.py

@@ -112,9 +112,17 @@ def run_calibration(self):
                 "eeprom_dev": raw[3],
                 "eeprom_serial": int.from_bytes(raw[4:8], "big"),
                 "jack": raw[8],
+                "touch0": raw[9],
+                "touch1": raw[10],
+                "touch2": raw[11],
+                "touch3": raw[12],
+                "touch4": raw[13],
+                "touch5": raw[14],
+                "touch6": raw[15],
+                "touch7": raw[16],
             }
             [print(k, hex(v)) for k, v in values.items()]
-            self._decode_raw_samples(raw[9:])
+            self._decode_raw_samples(raw[17:])
             self._handle_user_input()
             self._calculate_calibration_strings()
             time.sleep(0.1)

gateware/cal/debug_uart.sv

@@ -19,6 +19,14 @@ module debug_uart #(
     input [7:0] eeprom_dev,
     input [31:0] eeprom_serial,
     input [7:0] jack,
+    input [7:0] touch0,
+    input [7:0] touch1,
+    input [7:0] touch2,
+    input [7:0] touch3,
+    input [7:0] touch4,
+    input [7:0] touch5,
+    input [7:0] touch6,
+    input [7:0] touch7,
     input signed [W-1:0] adc0,
     input signed [W-1:0] adc1,
     input signed [W-1:0] adc2,
@@ -70,31 +78,39 @@ always_ff @(posedge clk) begin
             6:   dout <= eeprom_serial[32-2*8-1:32-3*8];
             7:   dout <= eeprom_serial[32-3*8-1:     0];
             8:   dout <= jack;
+            9:   dout <= touch0;
+            10:  dout <= touch1;
+            11:  dout <= touch2;
+            12:  dout <= touch3;
+            13:  dout <= touch4;
+            14:  dout <= touch5;
+            15:  dout <= touch6;
+            16:  dout <= touch7;
             // Channel 0
-            9:   dout <= adc0_ex[WM    -1:WM-1*8];
-            10:  dout <= adc0_ex[WM-1*8-1:WM-2*8];
-            11:  dout <= adc0_ex[WM-2*8-1:WM-3*8];
-            12:  dout <= adc0_ex[WM-3*8-1:     0];
+            17:   dout <= adc0_ex[WM    -1:WM-1*8];
+            18:  dout <= adc0_ex[WM-1*8-1:WM-2*8];
+            19:  dout <= adc0_ex[WM-2*8-1:WM-3*8];
+            20:  dout <= adc0_ex[WM-3*8-1:     0];
             // Channel 1
-            13:  dout <= adc1_ex[WM    -1:WM-1*8];
-            14:  dout <= adc1_ex[WM-1*8-1:WM-2*8];
-            15:  dout <= adc1_ex[WM-2*8-1:WM-3*8];
-            16:  dout <= adc1_ex[WM-3*8-1:     0];
+            21:  dout <= adc1_ex[WM    -1:WM-1*8];
+            22:  dout <= adc1_ex[WM-1*8-1:WM-2*8];
+            23:  dout <= adc1_ex[WM-2*8-1:WM-3*8];
+            24:  dout <= adc1_ex[WM-3*8-1:     0];
             // Channel 2
-            17:  dout <= adc2_ex[WM    -1:WM-1*8];
-            18:  dout <= adc2_ex[WM-1*8-1:WM-2*8];
-            19:  dout <= adc2_ex[WM-2*8-1:WM-3*8];
-            20:  dout <= adc2_ex[WM-3*8-1:     0];
+            25:  dout <= adc2_ex[WM    -1:WM-1*8];
+            26:  dout <= adc2_ex[WM-1*8-1:WM-2*8];
+            27:  dout <= adc2_ex[WM-2*8-1:WM-3*8];
+            28:  dout <= adc2_ex[WM-3*8-1:     0];
             // Channel 3
-            21:  dout <= adc3_ex[WM    -1:WM-1*8];
-            22:  dout <= adc3_ex[WM-1*8-1:WM-2*8];
-            23:  dout <= adc3_ex[WM-2*8-1:WM-3*8];
-            24:  dout <= adc3_ex[WM-3*8-1:     0];
+            29:  dout <= adc3_ex[WM    -1:WM-1*8];
+            30:  dout <= adc3_ex[WM-1*8-1:WM-2*8];
+            31:  dout <= adc3_ex[WM-2*8-1:WM-3*8];
+            32:  dout <= adc3_ex[WM-3*8-1:     0];
             default: begin
                 // Should never get here
             end
         endcase
-        if (state != 24) state <= state + 1;
+        if (state != 32) state <= state + 1;
         else state <= 0;
     end
 end

gateware/cores/touch_cv.sv

@@ -0,0 +1,43 @@
+//
+// Touch-to-CV. Touches on input jacks 1-4 are
+// translated into CV outputs on outputs 1-4.
+//
+// When building with touch sensing, be sure to build with
+// TOUCH=TOUCH_SENSE_ENABLED, for example:
+//
+// $ make CORE=touch_cv HW_REV=HW_R33 TOUCH=TOUCH_SENSE_ENABLED
+//
+
+`default_nettype none
+
+module touch_cv #(
+    parameter W = 16
+)(
+    input rst,
+    input clk,
+    input sample_clk,
+    input signed [W-1:0] sample_in0,
+    input signed [W-1:0] sample_in1,
+    input signed [W-1:0] sample_in2,
+    input signed [W-1:0] sample_in3,
+    output signed [W-1:0] sample_out0,
+    output signed [W-1:0] sample_out1,
+    output signed [W-1:0] sample_out2,
+    output signed [W-1:0] sample_out3,
+    input [7:0] jack,
+    input [7:0] touch0,
+    input [7:0] touch1,
+    input [7:0] touch2,
+    input [7:0] touch3,
+    input [7:0] touch4,
+    input [7:0] touch5,
+    input [7:0] touch6,
+    input [7:0] touch7
+);
+
+assign sample_out0 = W'(touch0) <<< (W-10);
+assign sample_out1 = W'(touch1) <<< (W-10);
+assign sample_out2 = W'(touch2) <<< (W-10);
+assign sample_out3 = W'(touch3) <<< (W-10);
+
+endmodule