Working communication between iCE40 and RP2040

README.md

@@ -59,4 +59,6 @@ Then drag the executable onto the RP2040 drive on the desktop.
 
 ## Special Thanks
 
-Christopher Lozinski (@clozinski) - wrote this README file. Thank you!
+Christopher Lozinski (@clozinski) - wrote this README file. Thank you!
+josuah (@josuah.demangeon) - helped answer questions during the development of this project
+venkat_tv (@venkat_tv) - developed the pico-ice hardware

fpga.pio

@@ -1,57 +1,101 @@
 .pio_version 0
+; green
+.define public DIR_PIN 12
+; red
+.define public REQ_PIN 13
+; blue
+.define public FIN_PIN 15
+.define public CLK_PIN 24
 
 .program fpga
-.fifo rx
 
-set x, 8
+start:
+set x, 0
+mov x, ~x
+mov osr, x        ; set pins to out
+out pindirs, 8    ; ...
+set pindirs, 0b11 ; ...
+set pins, 0b01    ; set dir to 1 and req to 0
+irq wait 0        ; wait for system to be ready
+
+wait 1 gpio CLK_PIN
+wait 0 gpio CLK_PIN
+
+set pins, 0b11    ; set dir and req to 1
+
+send_data_loop:
+set x, 0               ; set x to 0
+mov x, ~x
+pull noblock           ; get data from memory
+mov x, ~osr
+jmp !x recv_data_start ; check for end of values
+mov osr, ~x
+wait 1 gpio CLK_PIN    ; synchronize
+wait 0 gpio CLK_PIN    ; synchronize
+out pins, 8            ; output data to pins
+jmp send_data_loop     ; keep sending since no null-terminator
+
+recv_data_start:
+set pins, 0b00      ; set dir and req to 0
+set x, 0            ; reset x to 0
+mov osr, x          ; set pins to in
+out pindirs, 8      ; ...
+set pindirs, 0b01   ; ...
+wait 1 gpio REQ_PIN ; wait for data to be ready, indicated by req signal high
 
 .wrap_target
-
+wait 1 gpio CLK_PIN ; synchronize
-in x, 4
+wait 0 gpio CLK_PIN ; synchronize
-in null, 4
+in pins, 8          ; read data from pins
-push
+push noblock        ; write data to memory
-
+jmp pin start       ; stop receiving data if FPGA is done
-in pins, 8 [1]
+.wrap               ; otherwise keep receiving data
-push
-
-in x, 4
-in null, 4
-push
-
-in pins, 8 [1]
-push
-
-.wrap
 
 % c-sdk {
 #include <hardware/dma.h>
 
-#ifndef DMA_CHANNEL
+static int command_dma_channel;
-#define DMA_CHANNEL 0
+static int frame_dma_channel;
-#endif//DMA_CHANNEL
 
-static uint8_t frame_buffer[2][FRAME_WIDTH * FRAME_HEIGHT * 16 / 8] = { };
+static void fpga_program_init(PIO pio, uint sm, uint offset, uint bus_base, uint status_base, uint fin_pin)
-static bool current_frame = false;
-
-static inline void fpga_program_init(PIO pio, uint sm, uint offset, uint pin_base, float div)
 {
     {
         pio_sm_config c = fpga_program_get_default_config(offset);
-        sm_config_set_in_pins(&c, pin_base);
+        sm_config_set_in_pins(&c, bus_base);
-        pio_sm_set_consecutive_pindirs(pio, sm, pin_base, 8, false);
+        sm_config_set_out_pins(&c, bus_base, 8);
+        sm_config_set_set_pins(&c, status_base, 2);
+        sm_config_set_jmp_pin(&c, fin_pin);
 
         sm_config_set_in_shift(&c, false, false, 8);
+        sm_config_set_out_shift(&c, false, false, 8);
 
         pio_sm_init(pio, sm, offset, &c);
+
+        for (int i = 0; i < 8; i++) { pio_gpio_init(pio, bus_base + i); }
+        for (int i = 0; i < 2; i++) { pio_gpio_init(pio, status_base + i); }
+    }
+
+    command_dma_channel = dma_claim_unused_channel(true);
+    frame_dma_channel = dma_claim_unused_channel(true);
+
+    {
+        dma_channel_config c = dma_channel_get_default_config(command_dma_channel);
+        channel_config_set_read_increment(&c, true);
+        channel_config_set_write_increment(&c, false);
+        channel_config_set_transfer_data_size(&c, DMA_SIZE_8);
+        channel_config_set_dreq(&c, pio_get_dreq(pio, sm, true));
+        channel_config_set_chain_to(&c, frame_dma_channel);
+
+        dma_channel_configure(command_dma_channel, &c, &pio->txf[sm], NULL, 0, false);
     }
     {
-        dma_channel_config c = dma_channel_get_default_config(DMA_CHANNEL);
+        dma_channel_config c = dma_channel_get_default_config(frame_dma_channel);
         channel_config_set_read_increment(&c, false);
         channel_config_set_write_increment(&c, true);
         channel_config_set_transfer_data_size(&c, DMA_SIZE_8);
         channel_config_set_dreq(&c, pio_get_dreq(pio, sm, false));
 
-        dma_channel_configure(DMA_CHANNEL, &c, NULL, &pio->rxf[sm], FRAME_WIDTH * FRAME_HEIGHT * 2 + 1, false);
+        dma_channel_configure(frame_dma_channel, &c, NULL, &pio->rxf[sm], FRAME_WIDTH * FRAME_HEIGHT * 2, false);
     }
 }
 %}

ice/constraints.pdc

@@ -1,5 +1,7 @@
 ldc_set_location -site 35 [get_ports {clk}]
-ldc_set_location -site 14 [get_ports {start}]
+ldc_set_location -site 41 [get_ports {req}]
+ldc_set_location -site 40 [get_ports {fin}]
+ldc_set_location -site 39 [get_ports {dir}]
 
 ldc_set_location -site 27 [get_ports {data[0]}]
 ldc_set_location -site 25 [get_ports {data[1]}]

ice/constraints.sdc

@@ -1 +1 @@
-create_clock -period 20.8333 [get_ports {clk}]
+create_clock -period 20.8333333 [get_ports {clk}]

ice/mandelbrot/.ng_run_manager.ini

@@ -0,0 +1,8 @@
+[Runmanager]
+Geometry=@ByteArray(\x1\xd9\xd0\xcb\0\x3\0\0\0\0\0\0\0\0\0\x14\0\0\x1\xca\0\0\0\xb9\0\0\0\0\0\0\0\x14\0\0\x1\xca\0\0\0\xb9\0\0\0\0\0\0\0\0\n\0\0\0\0\0\0\0\0\x14\0\0\x1\xca\0\0\0\xb9)
+headerState=@ByteArray(\0\0\0\xff\0\0\0\0\0\0\0\x1\0\0\0\x1\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x15\0\xf0\x1f\0\0\0\t\0\0\0\f\0\0\0\x64\0\0\0\r\0\0\0\x64\0\0\0\x12\0\0\0\x64\0\0\0\x13\0\0\0\x64\0\0\0\x10\0\0\0\x64\0\0\0\x11\0\0\0\x64\0\0\0\x14\0\0\0\x64\0\0\0\xe\0\0\0\x64\0\0\0\xf\0\0\0\x64\0\0\x5\xf\0\0\0\x15\x1\x1\0\x1\0\0\0\0\0\0\0\0\0\0\0\0\x64\xff\xff\xff\xff\0\0\0\x84\0\0\0\0\0\0\0\x15\0\0\0\xc3\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\x64\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\0\0\0\0\0\x1\0\0\0\0\0\0\x3\xe8\0\0\0\0\x64)
+
+[impl_1%3CStrategy1%3E]
+isChecked=false
+isHidden=false
+isExpanded=false

ice/mandelbrot/.recovery

@@ -4,7 +4,10 @@
     <Implementation title="impl_1" dir="impl_1" description="impl_1" synthesis="synplify" default_strategy="Strategy1">
         <Options def_top="top"/>
         <Source name="source/impl_1/top.sv" type="Verilog" type_short="Verilog">
-            <Options VerilogStandard="System Verilog" top_module="top"/>
+            <Options VerilogStandard="System Verilog"/>
+        </Source>
+        <Source name="../ram.sv" type="Verilog" type_short="Verilog">
+            <Options VerilogStandard="System Verilog" top_module="RAM"/>
         </Source>
         <Source name="../constraints.pdc" type="Physical Constraints File" type_short="PDC">
             <Options/>

ice/mandelbrot/.setting.ini

@@ -0,0 +1,7 @@
+[General]
+IdFilter=@Invalid()
+ProcessFilter=@Invalid()
+TypeFilter=0
+
+[Individuals]
+size=0

ice/mandelbrot/drc.log

@@ -1,6 +1,3 @@
 DRC: Design Rule Check Radiant Software (64-bit) 2024.1.0.34.2
-Wed Sep 25 13:18:59 2024
+Sat Sep 28 23:33:51 2024
 
-WARNING <71003020> - Top module port 'start' does not connect to anything.
-ERROR <71003010> - The port [clk] is assigned to a nonexistent pin [35]. Reassign the port to a valid pin.
-ERROR <71003010> - The port [data[0]] is assigned to a nonexistent pin [27]. Reassign the port to a valid pin.

ice/mandelbrot/mandelbrot.rdf

@@ -1,9 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<RadiantProject version="4.2" radiant="2024.1.0.34.2" title="mandelbrot" device="iCE40UP5K-UWG30ITR" performance_grade="High-Performance_1.2V" family_int="ice40tp" device_int="itpa08" package_int="UWG30" operation_int="IND" speed_int="6" default_implementation="impl_1">
+<RadiantProject version="4.2" radiant="2024.1.0.34.2" title="mandelbrot" device="iCE40UP5K-SG48I" performance_grade="High-Performance_1.2V" family_int="ice40tp" device_int="itpa08" package_int="SG48" operation_int="IND" speed_int="6" default_implementation="impl_1">
     <Options/>
     <Implementation title="impl_1" dir="impl_1" description="impl_1" synthesis="synplify" default_strategy="Strategy1">
         <Options/>
-        <Source name="../top.sv" type="Verilog" type_short="Verilog">
+        <Source name="source/impl_1/top.sv" type="Verilog" type_short="Verilog">
+            <Options VerilogStandard="System Verilog" top_module="top"/>
+        </Source>
+        <Source name="../ram.sv" type="Verilog" type_short="Verilog">
             <Options VerilogStandard="System Verilog"/>
         </Source>
         <Source name="../constraints.pdc" type="Physical Constraints File" type_short="PDC">

ice/mandelbrot/mandelbrot_tcl.html

@@ -40,8 +40,153 @@ if (a)
 <BODY>
 
 <DIV id="content" onclick="hideTocList()"><PRE>
+<A name="pn240928081403"></A><B><U><big>pn240928081403</big></U></B>
+#Start recording tcl command: 9/25/2024 13:09:03
+#Project Location: C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot; Project name: mandelbrot
+prj_create -name "mandelbrot" -impl "impl_1" -dev iCE40UP5K-UWG30ITR -performance "High-Performance_1.2V" -synthesis "synplify"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv" "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/constraints.sdc" "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/constraints.pdc"
+prj_save 
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/impl_1/top.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/impl_1/top.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/source/impl_1/top.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_set_device -part iCE40UP5K-SG48I -performance "High-Performance_1.2V"
+prj_run Synthesis -impl impl_1
+prj_run Map -impl impl_1
+prj_run Map -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/xd.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/xd.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+prj_disable_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+prj_enable_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+#Stop recording: 9/28/2024 08:14:03
+
+
+
+<A name="pn241002102238"></A><B><U><big>pn241002102238</big></U></B>
+#Start recording tcl command: 10/2/2024 09:00:03
+#Project Location: C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot; Project name: mandelbrot
+prj_open "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/mandelbrot.rdf"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+#Stop recording: 10/2/2024 10:22:38
+
+
+
 </PRE></DIV>
 
+<DIV id="toc" class="radiant"><span onmousemove="showTocList()">Contents</span>
+<UL id="toc_list">
+<LI><A href=#pn240928081403>pn240928081403</A></LI>
+<LI><A href=#pn241002102238>pn241002102238</A></LI>
+</UL>
+</DIV>
+
 <button id="back_to_top" class="radiant" onclick="scrollToTop()">&lt;</button>
 <script type="text/javascript">
 <!--

ice/mandelbrot/mandelbrot_tcr.dir/pn240928081403.tcr

@@ -0,0 +1,125 @@
+#Start recording tcl command: 9/25/2024 13:09:03
+#Project Location: C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot; Project name: mandelbrot
+prj_create -name "mandelbrot" -impl "impl_1" -dev iCE40UP5K-UWG30ITR -performance "High-Performance_1.2V" -synthesis "synplify"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv" "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/constraints.sdc" "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/constraints.pdc"
+prj_save 
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/impl_1/top.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/impl_1/top.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/source/impl_1/top.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_set_device -part iCE40UP5K-SG48I -performance "High-Performance_1.2V"
+prj_run Synthesis -impl impl_1
+prj_run Map -impl impl_1
+prj_run Map -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/top.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/xd.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/xd.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run Export -impl impl_1
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+prj_disable_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+prj_enable_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_remove_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/spi.sv"
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+prj_run PAR -impl impl_1
+prj_run Export -impl impl_1
+#Stop recording: 9/28/2024 08:14:03

ice/mandelbrot/mandelbrot_tcr.dir/pn241002102238.tcr

@@ -0,0 +1,5 @@
+#Start recording tcl command: 10/2/2024 09:00:03
+#Project Location: C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot; Project name: mandelbrot
+prj_open "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/mandelbrot.rdf"
+prj_add_source "C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/ram.sv"
+#Stop recording: 10/2/2024 10:22:38

ice/mandelbrot/promote.xml

@@ -1,3 +1,3 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<userSetting name="C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/promote.xml" version="Diamond (64-bit) 2024.1.0.34.2" date="Thu Sep 26 10:20:19 2024" vendor="Lattice Semiconductor Corporation" >
+<userSetting name="C:/Users/fuzzc/Documents/Hardware/pico-ice/pico-ice-video/ice/mandelbrot/promote.xml" version="Diamond (64-bit) 2024.1.0.34.2" date="Wed Oct 02 12:34:15 2024" vendor="Lattice Semiconductor Corporation" >
 </userSetting>

ice/mandelbrot/reportview.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE Report>
+<ReportView version="2.0">
+    <Implement name="impl_1">
+        <ToolReport id="toolpio" path="" status="0"/>
+        <ToolReport id="toolsso" path="" status="0"/>
+    </Implement>
+</ReportView>

ice/mandelbrot/source/impl_1/top.sv

@@ -1,20 +1,75 @@
 module top
 (
 	input wire clk,
-	input wire start,
+	input wire dir,
-	output wire [7:0] data
+	inout wire req,
+	output wire fin,
+	inout wire [7:0] data
 );
 
+reg dir_last;
+reg req_last;
+
+reg req_r;
+reg fin_r;
 reg [7:0] data_r;
 
+reg [6:0] x;
+reg [6:0] y;
+
+reg cntr;
+
+reg [7:0] waddr;
+reg [7:0] raddr;
+
+wire [7:0] command;
+
+RAM command_buffer(.wclk(clk), .rclk(clk), .waddr(waddr), .raddr(raddr), .data_in(data), .write_en(dir && req), .data_out(command));
+
 always_ff @(posedge clk) begin
-	data_r <= data_r + 1;
+	dir_last <= dir;
+	req_last <= req;
+	req_r <= !fin_r && !dir_last;
 	
-	if (data_r < 16 || data_r > 235) begin
+	if (dir) begin
-		data_r <= 16;
+		x <= 0;
+		y <= 0;
+		fin_r <= 0;
+		cntr <= 0;
+		raddr <= 0;
+		
+		if (req && req_last) begin
+			waddr <= waddr + 1;
+		end else begin
+			waddr <= 0;
+		end
+	end else begin
+		cntr <= !cntr;
+		if (cntr) begin
+			data_r <= command;
+			raddr <= 1 - raddr;
+			if (x + y == 0) begin
+				fin_r <= 1;
+			end
+		end else begin
+			data_r <= ((x + y) >> 1) + 16;
+			
+			if (x < 127) begin
+				x <= x + 1;
+			end else begin
+				x <= 0;
+				if (y < 127) begin
+					y <= y + 1;
+				end else begin
+					y <= 0;
+				end
+			end
+		end
 	end
 end
 
-assign data = data_r;
+assign req = dir ? 'Z : req_r;
+assign fin = fin_r;
+assign data = dir ? 'Z : data_r;
 
 endmodule

ice/ram.sv

@@ -0,0 +1,31 @@
+module RAM
+#(
+	parameter ADDR_WIDTH = 8,
+	parameter DATA_WIDTH = 8
+)(
+	input wire wclk,
+	input wire rclk,
+	input wire [ADDR_WIDTH-1:0] waddr,
+	input wire [ADDR_WIDTH-1:0] raddr,
+	input wire [DATA_WIDTH-1:0] data_in,
+	input wire write_en,
+	output wire [DATA_WIDTH-1:0] data_out
+);
+
+reg [DATA_WIDTH-1:0] data_out_r;
+
+reg [DATA_WIDTH-1:0] mem[(1<<ADDR_WIDTH)-1:0];
+
+always @(posedge wclk) begin
+	if (write_en) begin
+		mem[waddr] <= data_in;
+	end
+end
+
+always @(posedge rclk) begin
+	data_out_r <= mem[raddr];
+end
+
+assign data_out = data_out_r;
+
+endmodule

main.cpp

@@ -1,6 +1,7 @@
 #include <ice_fpga.h>
 #include <ice_led.h>
 #include <ice_usb.h>
+#include <ice_spi.h>
 #include <tusb.h>
 #include <boards/pico_ice.h>
 #include <bsp/board_api.h>
@@ -10,63 +11,37 @@
 
 #include "fpga.pio.h"
 
-static PIO pio;
+static const PIO pio = pio0;
 static uint sm;
 
-#define ICE_FPGA_START_FRAME_PIN ICE_FPGA_14_PIN
+static uint8_t frame_buffer[FRAME_WIDTH * FRAME_HEIGHT * 2] = { };
+static uint8_t command_buffer[256] = { };
 
 static void video_task();
-static void start_next_frame()
+static void start_next_frame();
-{
-	if (dma_channel_is_busy(DMA_CHANNEL)) { return; }
 
-	gpio_put(ICE_FPGA_START_FRAME_PIN, true);
+static bool finished = false;
-	sleep_ms(10);
-	printf("%d - ", gpio_get(ICE_FPGA_START_FRAME_PIN));
-	gpio_put(ICE_FPGA_START_FRAME_PIN, false);
-	sleep_ms(10);
-	printf("%d - ", gpio_get(ICE_FPGA_START_FRAME_PIN));
-
-	pio_sm_set_enabled(pio, sm, false);
-	pio_sm_clear_fifos(pio, sm);
-	pio_sm_restart(pio, sm);
-	dma_channel_set_write_addr(DMA_CHANNEL, frame_buffer[current_frame] - !current_frame, true);
-	current_frame = !current_frame;
-	pio_sm_set_enabled(pio, sm, true);
-}
 
 int main()
 {
-	// set to 120 MHz as it's exactly 2.5x the FPGA clock
-	set_sys_clock_khz(120000, true);
-
 	tusb_init();
 	stdio_init_all();
 
 	ice_led_init();
 	ice_usb_init();
 
-	ice_fpga_init(48);
+	ice_fpga_init(8);
 	ice_fpga_start();
 
-	gpio_init_mask(0b111111111);
+	gpio_pull_up(DIR_PIN);
-	gpio_set_dir(ICE_FPGA_27_PIN, GPIO_IN); // 0
+	gpio_pull_up(REQ_PIN);
-	gpio_set_dir(ICE_FPGA_25_PIN, GPIO_IN); // 1
+	gpio_init(FIN_PIN);
-	gpio_set_dir(ICE_FPGA_21_PIN, GPIO_IN); // 2
+	gpio_pull_up(FIN_PIN);
-	gpio_set_dir(ICE_FPGA_19_PIN, GPIO_IN); // 3
-	gpio_set_dir(ICE_FPGA_26_PIN, GPIO_IN); // 4
-	gpio_set_dir(ICE_FPGA_23_PIN, GPIO_IN); // 5
-	gpio_set_dir(ICE_FPGA_20_PIN, GPIO_IN); // 6
-	gpio_set_dir(ICE_FPGA_18_PIN, GPIO_IN); // 7
 
-	gpio_set_dir(ICE_FPGA_START_FRAME_PIN, GPIO_OUT); // 8
-
-	gpio_put(ICE_FPGA_START_FRAME_PIN, false);
-
-	pio = pio0;
 	const uint offset = pio_add_program(pio, &fpga_program);
 	sm = pio_claim_unused_sm(pio, true);
-	fpga_program_init(pio, sm, offset, 0, 1);
+	fpga_program_init(pio, sm, offset, 0, DIR_PIN, FIN_PIN);
+	pio_sm_set_enabled(pio, sm, true);
 
 	tud_init(0);
 
@@ -75,8 +50,13 @@ int main()
 		board_init_after_tusb();
 	}
 
+	start_next_frame();
+
 	while (true)
 	{
+		printf("%d %d |", command_buffer[0], command_buffer[1]);
+		for (int i = 0; i < 8; i++) { printf(" %d", gpio_get(i)); }
+		printf("\n");
 		tud_task();
 		video_task();
 	}
@@ -85,6 +65,9 @@ int main()
 
 static unsigned int interval_ms = 1000 / FRAME_RATE;
 static bool tx_busy = false;
+static bool rendering = false;
+
+static bool is_rendering() { return rendering || !pio_interrupt_get(pio, 0); }
 
 void video_task()
 {
@@ -103,23 +86,50 @@ void video_task()
 		tx_busy = true;
 		start_ms = board_millis();
 
-		start_next_frame();
+		tud_video_n_frame_xfer(0, 0, frame_buffer, FRAME_WIDTH * FRAME_HEIGHT * 2);
-		tud_video_n_frame_xfer(0, 0, frame_buffer[current_frame], FRAME_WIDTH * FRAME_HEIGHT * 16 / 8);
+
+		return;
 	}
 
 	const unsigned int cur = board_millis();
 	if (cur - start_ms < interval_ms) { return; }
 	if (tx_busy) { return; }
+	if (is_rendering()) { return; }
 	start_ms += interval_ms;
 	tx_busy = true;
 
-	tud_video_n_frame_xfer(0, 0, frame_buffer[current_frame], FRAME_WIDTH * FRAME_HEIGHT * 16 / 8);
+	tud_video_n_frame_xfer(0, 0, frame_buffer, FRAME_WIDTH * FRAME_HEIGHT * 2);
+}
+
+void start_next_frame()
+{
+	if (is_rendering()) { return; }
+	rendering = true;
+
+	command_buffer[0] = (command_buffer[0] + 4) % 256;
+	if (command_buffer[0] == 0)
+	{
+		command_buffer[1] = (command_buffer[1] + 16) % 256;
+	}
+
+	dma_channel_set_trans_count(frame_dma_channel, FRAME_WIDTH * FRAME_HEIGHT * 2, false);
+	dma_channel_set_write_addr(frame_dma_channel, frame_buffer, false);
+
+	dma_channel_set_trans_count(command_dma_channel, 2, false);
+	dma_channel_set_read_addr(command_dma_channel, command_buffer, true);
+
+	// clear irq to indicate ready
+	while (pio_interrupt_get(pio, 0))
+	{
+		pio_interrupt_clear(pio, 0);
+	}
+
+	rendering = false;
 }
 
 void tud_video_frame_xfer_complete_cb(uint_fast8_t ctl_idx, uint_fast8_t stm_idx)
 {
 	tx_busy = false;
-
 	start_next_frame();
 }
 

tusb_config.h

@@ -72,8 +72,8 @@
 #define CFG_TUD_VIDEO_STREAMING_EP_BUFSIZE 1023
 #define CFG_TUD_VIDEO_STREAMING_BULK 0
 
-#define FRAME_WIDTH 320
+#define FRAME_WIDTH 128
-#define FRAME_HEIGHT 180
+#define FRAME_HEIGHT 128
 #define FRAME_RATE 60
 
 // Temporarily here until ice_usb.h has necessary info