Implement reactive lighting effects (#18)

keyboards/annepro2/annepro2.c

@@ -89,6 +89,10 @@ void matrix_scan_kb() {
  */
 bool OVERRIDE process_record_kb(uint16_t keycode, keyrecord_t *record) {
     if (record->event.pressed) {
+        if (AP2_LED_ENABLED && AP2_LED_DYNAMIC_PROFILE) {
+            annepro2LedForwardKeypress(record->event.key.row, record->event.key.col);
+        }
+
         switch (keycode) {
             case KC_AP2_BT1:
                 annepro2_ble_broadcast(0);

keyboards/annepro2/qmk_ap2_led.c

@@ -2,14 +2,19 @@
 #include "annepro2.h"
 #include "qmk_ap2_led.h"
 
+bool AP2_LED_ENABLED = false;
+bool AP2_LED_DYNAMIC_PROFILE = false;
+
 void annepro2LedDisable(void)
 {
   sdPut(&SD0, CMD_LED_OFF);
+  AP2_LED_ENABLED = false;
 }
 
 void annepro2LedEnable(void)
 {
   sdPut(&SD0, CMD_LED_ON);
+  AP2_LED_ENABLED = true;
 }
 
 void annepro2LedUpdate(uint8_t row, uint8_t col)
@@ -31,6 +36,8 @@ void annepro2LedSetProfile(uint8_t prof)
 {
   sdPut(&SD0, CMD_LED_SET_PROFILE);
   sdPut(&SD0, prof);
+  uint8_t buf = sdGet(&SD0);
+  AP2_LED_DYNAMIC_PROFILE = buf;
 }
 
 uint8_t annepro2LedGetProfile()
@@ -52,6 +59,8 @@ uint8_t annepro2LedGetNumProfiles()
 void annepro2LedNextProfile()
 {
   sdPut(&SD0, CMD_LED_NEXT_PROFILE);
+  uint8_t buf = sdGet(&SD0);
+  AP2_LED_DYNAMIC_PROFILE = buf;
 }
 
 void annepro2LedNextIntensity()
@@ -94,3 +103,20 @@ void annepro2LedResetForegroundColor()
   annepro2LedSetProfile(currentProfile);
 }
 
+/*
+ * If enabled, this data is sent to LED MCU on every keypress.
+ * In order to improve performance, both row and column values
+ * are packed into a single byte.
+ * Row range is [0, 4] and requires only 3 bits.
+ * Column range is [0, 13] and requires 4 bits.
+ *
+ * In order to differentiate this command from regular commands,
+ * the leftmost bit is set to 1 (0b10000000).
+ * Following it are 3 bits of row and 4 bits of col.
+ * 1 + 3 + 4 = 8 bits - only a single byte is sent for every keypress.
+ */
+void annepro2LedForwardKeypress(uint8_t row, uint8_t col)
+{
+  uint8_t msg = 0b10000000 | (row << 4) | col;
+  sdPut(&SD0, msg);
+}

keyboards/annepro2/qmk_ap2_led.h

@@ -14,6 +14,7 @@
 #define CMD_LED_NEXT_INTENSITY              0xC
 #define CMD_LED_NEXT_ANIMATION_SPEED        0xD
 #define CMD_LED_SET_FOREGROUND_COLOR        0xE
+#define CMD_LED_KEYPRESS                    0xF
 
 void annepro2LedDisable(void);
 void annepro2LedEnable(void);
@@ -30,3 +31,8 @@ void annepro2LedNextIntensity(void);
 void annepro2LedNextAnimationSpeed(void);
 void annepro2LedSetForegroundColor(uint8_t red, uint8_t green, uint8_t blue);
 void annepro2LedResetForegroundColor(void);
+void annepro2LedForwardKeypress(uint8_t row, uint8_t col);
+
+
+extern bool AP2_LED_ENABLED;
+extern bool AP2_LED_DYNAMIC_PROFILE;