nvboard: seperate real-time pins and non-real-time pins

* only update real-time pins every cycle

board/N4

@@ -1,4 +1,5 @@
 input CLK
+input RST
 
 input BTNC
 input BTNU
@@ -6,8 +7,6 @@ input BTND
 input BTNL
 input BTNR
 
-input RST
-
 input SW0
 input SW1
 input SW2
@@ -130,34 +129,34 @@ output SEG7F
 output SEG7G
 output DEC7P
 
-output VGA_CLK
-output VGA_VSYNC
-output VGA_HSYNC
-output VGA_BLANK_N
-output VGA_R0
-output VGA_R1
-output VGA_R2
-output VGA_R3
-output VGA_R4
-output VGA_R5
-output VGA_R6
-output VGA_R7
-output VGA_G0
-output VGA_G1
-output VGA_G2
-output VGA_G3
-output VGA_G4
-output VGA_G5
-output VGA_G6
-output VGA_G7
-output VGA_B0
-output VGA_B1
-output VGA_B2
-output VGA_B3
-output VGA_B4
-output VGA_B5
-output VGA_B6
-output VGA_B7
+rt_output VGA_CLK
+rt_output VGA_VSYNC
+rt_output VGA_HSYNC
+rt_output VGA_BLANK_N
+rt_output VGA_R0
+rt_output VGA_R1
+rt_output VGA_R2
+rt_output VGA_R3
+rt_output VGA_R4
+rt_output VGA_R5
+rt_output VGA_R6
+rt_output VGA_R7
+rt_output VGA_G0
+rt_output VGA_G1
+rt_output VGA_G2
+rt_output VGA_G3
+rt_output VGA_G4
+rt_output VGA_G5
+rt_output VGA_G6
+rt_output VGA_G7
+rt_output VGA_B0
+rt_output VGA_B1
+rt_output VGA_B2
+rt_output VGA_B3
+rt_output VGA_B4
+rt_output VGA_B5
+rt_output VGA_B6
+rt_output VGA_B7
 
-input PS2_CLK
-input PS2_DAT
+rt_input PS2_CLK
+rt_input PS2_DAT

include/nvboard.h

@@ -5,10 +5,7 @@
 #include <vga.h>
 #include <keyboard.h>
 
-#define NVBOARD_DIR_input  false
-#define NVBOARD_DIR_output true
-
 void nvboard_init();
 void nvboard_quit();
-void nvboard_bind_pin(void *signal, bool is_output, int len, ...);
+void nvboard_bind_pin(void *signal, bool is_rt, bool is_output, int len, ...);
 void nvboard_update();

scripts/auto_pin_bind.py

@@ -10,7 +10,20 @@ def inout_dict(file_path):
     line = line.strip(' \n')
     line = line.split(' ')
     if len(line) == 2:
-      inout[line[1].replace(' ', '')] = line[0].replace(' ', '')
+      direction = line[0].replace(' ', '')
+      is_real_time_str = 'false'
+      is_output_str = ''
+      if direction.startswith('rt_'):
+        is_real_time_str = 'true'
+        direction = direction[3:]
+      if direction == "input":
+        is_output_str = 'false'
+      elif direction == "output":
+        is_output_str = 'true'
+      else:
+        print("invalid direction")
+        exit(-1)
+      inout[line[1].replace(' ', '')] = (is_output_str, is_real_time_str)
     line = f.readline()
   return inout
 
@@ -54,7 +67,8 @@ def bind_pin(f, inout, signal, pin):
   pin = pin.replace(' ', '')
   check_pin_valid(inout, pin)
   signal_addr = "&top->" + signal
-  write_dep(bind_f, "nvboard_bind_pin(" + signal_addr + ", " + "NVBOARD_DIR_" + inout[pin] + ", 1, " + pin + ");\n")
+  strs = inout[pin]
+  write_dep(bind_f, "nvboard_bind_pin(" + signal_addr + ", " + strs[1] + ", " + strs[0] + ", 1, " + pin + ");\n")
 
 
 def bind_vec_pins(f, inout, signal, pins):
@@ -62,7 +76,8 @@ def bind_vec_pins(f, inout, signal, pins):
     pins[idx] = pins[idx].replace(' ', '')
     check_pin_valid(inout, pins[idx])
   signal_addr = "&top->" + signal
-  write_dep(bind_f, "nvboard_bind_pin(" + signal_addr + ", "  + "NVBOARD_DIR_" + inout[pins[0]] + ", " + str(len(pins)))
+  strs = inout[pins[0]]
+  write_dep(bind_f, "nvboard_bind_pin(" + signal_addr + ", "  + strs[1] + ", " + strs[0] + ", " + str(len(pins)))
   for idx in range(len(pins)):
     write_dep(bind_f, ", " + pins[idx])
   write_dep(bind_f, ");\n")

src/nvboard.cpp

@@ -35,6 +35,7 @@ typedef struct PinMap {
 } PinMap;
 
 static PinMap *pin_map = NULL;
+static PinMap *rt_pin_map = NULL; // real-time pins
 
 static SDL_Window *main_window = nullptr;
 static SDL_Renderer *main_renderer = nullptr;
@@ -85,7 +86,7 @@ static void nvboard_update_output(PinMap *p) {
 }
 
 void nvboard_update() {
-  for (auto p = pin_map; p != NULL; p = p->next) {
+  for (auto p = rt_pin_map; p != NULL; p = p->next) {
     if (p->is_output) nvboard_update_output(p);
     else nvboard_update_input(p);
   }
@@ -96,6 +97,12 @@ void nvboard_update() {
   uint64_t now = get_time();
   if (now - last > 1000000 / FPS) {
     last = now;
+
+    for (auto p = pin_map; p != NULL; p = p->next) {
+      if (p->is_output) nvboard_update_output(p);
+      else nvboard_update_input(p);
+    }
+
     SDL_RenderPresent(main_renderer);
     int ev = read_event();
     if (ev != -1) { update_components(main_renderer); }
@@ -142,7 +149,7 @@ void nvboard_quit(){
     SDL_Quit();
 }
 
-void nvboard_bind_pin(void *signal, bool is_output, int len, ...) {
+void nvboard_bind_pin(void *signal, bool is_rt, bool is_output, int len, ...) {
   PinMap *p = new PinMap;
   p->is_output = is_output;
   p->len = len;
@@ -162,6 +169,6 @@ void nvboard_bind_pin(void *signal, bool is_output, int len, ...) {
   va_end(ap);
 
   p->signal = signal;
-  p->next = pin_map;
-  pin_map = p;
+  if (is_rt) { p->next = rt_pin_map; rt_pin_map = p; }
+  else { p->next = pin_map; pin_map = p; }
 }