lil startup animation

src/as1115.c

@@ -5,3 +5,9 @@ int as1115_send_command(uint8_t cmd, uint8_t data) {
   uint8_t packet[] = {cmd, data};
   return i2c_write(0x00, packet, sizeof packet);
 }
+
+void as1115_blank_display() {
+  for (int i = 1; i <= 8; i++) {
+    as1115_send_command(i, 0xFF);
+  }
+}

src/as1115.h

@@ -21,3 +21,4 @@
 #define DIG_6_7_INTENSITY_REG 0x13
 
 int as1115_send_command(uint8_t cmd, uint8_t data);
+void as1115_blank_display();

src/config.h

@@ -5,7 +5,9 @@
 
 #define OSCILLATOR_CALIBRATION 0x76
 
-#define MAIN_TIME 30 * 1000L
-// #define TIME_INCREMENT 30*1000L
+#define MAIN_TIME 60 * 1000L
+// #define TIME_INCREMENT 10*1000L
 #define INCREMENT_MODE MODE_FISCHER
 #define RESET_DELAY 3000
+#define STARTUP_ANIMATION
+#define DISPLAY_BRIGHTNESS 0x06

src/main.c

@@ -1,5 +1,6 @@
 #include <avr/interrupt.h>
 #include <avr/io.h>
+#include <avr/pgmspace.h>
 #include <stdbool.h>
 #include <stdint.h>
 #include <string.h>
@@ -15,11 +16,28 @@
 #define PLAYER_A_BUTTON 0
 #define PLAYER_B_BUTTON 1
 
+PROGMEM const uint8_t startup_animation[][8] = {
+    {0xFF, 0xFF, 0xFF, 0x0A, 0x0A, 0xFF, 0xFF, 0xFF},
+    {0xFF, 0xFF, 0x0A, 0xFF, 0xFF, 0x0A, 0xFF, 0xFF},
+    {0xFF, 0x0A, 0xFF, 0xFF, 0xFF, 0xFF, 0x0A, 0xFF},
+    {0x0A, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x0A},
+    {0xFF, 0x0A, 0xFF, 0xFF, 0xFF, 0xFF, 0x0A, 0xFF},
+    {0xFF, 0xFF, 0x0A, 0xFF, 0xFF, 0x0A, 0xFF, 0xFF},
+    {0xFF, 0xFF, 0xFF, 0x0A, 0x0A, 0xFF, 0xFF, 0xFF},
+    {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
+};
+
 volatile uint32_t ms_since_boot = 0;
 
-typedef enum { STOPPED, PLAYER_A, PLAYER_B } state_type;
+typedef enum { STARTUP, STOPPED, PLAYER_A, PLAYER_B } state_type;
 
-volatile state_type state = STOPPED;
+#ifdef STARTUP_ANIMATION
+#define INITIAL_STATE STARTUP
+#else
+#define INITIAL_STATE STOPPED
+#endif
+
+volatile state_type state = INITIAL_STATE;
 
 volatile uint32_t player_a_timer = MAIN_TIME;
 volatile uint32_t player_b_timer = MAIN_TIME;
@@ -151,25 +169,7 @@ void reset() {
   render_timer(player_b_timer, DISPLAY_RIGHT);
 }
 
-int main() {
-  cli();
-  setupio();
-  i2c_init();
-  setup_clock();
-  sei();
-
-  render_timer(MAIN_TIME, DISPLAY_LEFT);
-  render_timer(MAIN_TIME, DISPLAY_RIGHT);
-
-  as1115_send_command(DECODE_MODE_REG, 0xFF);      // decode
-  as1115_send_command(SCAN_LIMIT_REG, 0x07);       // enable all digits
-  as1115_send_command(GLOBAL_INTENSITY_REG, 0x06); // set brightness
-  as1115_send_command(SHUTDOWN_REG, 0x01);         // turn on
-
-  while (true) {
-    render_timer(player_a_timer, DISPLAY_LEFT);
-    render_timer(player_b_timer, DISPLAY_RIGHT);
-
+void handle_buttons() {
   cli();
   if (button_pressed(PLAYER_A_BUTTON) && state != PLAYER_B &&
       player_b_timer != 0 && player_a_timer != 0) {
@@ -185,10 +185,49 @@ int main() {
     move_started_at = player_a_timer;
   }
   sei();
+}
 
+int main() {
+  cli();
+  setupio();
+  i2c_init();
+  setup_clock();
+  sei();
+
+  as1115_blank_display();
+
+  as1115_send_command(DECODE_MODE_REG, 0xFF); // decode
+  as1115_send_command(SCAN_LIMIT_REG, 0x07);  // enable all digits
+  as1115_send_command(GLOBAL_INTENSITY_REG,
+                      DISPLAY_BRIGHTNESS); // set brightness
+  as1115_send_command(SHUTDOWN_REG, 0x01); // turn on
+
+  while (true) {
+    switch (state) {
+    case STARTUP: {
+      size_t frame = ms_since_boot / 100;
+      if (frame >= sizeof startup_animation / 8) {
+        state = STOPPED;
+        break;
+      }
+
+      for (int i = 0; i < 8; i++) {
+        uint8_t byte = pgm_read_byte(&startup_animation[frame][i]);
+        as1115_send_command(i + 1, byte);
+      }
+      break;
+    }
+    case PLAYER_A:
+    case PLAYER_B:
+    case STOPPED:
+      render_timer(player_a_timer, DISPLAY_LEFT);
+      render_timer(player_b_timer, DISPLAY_RIGHT);
+      handle_buttons();
       if (state == STOPPED && (player_a_timer == 0 || player_b_timer == 0) &&
           (ms_since_boot > finished_at + RESET_DELAY)) {
         reset();
       }
+      break;
+    }
   }
 }