Added encoder support to split common code (#5477)

* Added slave encoder support to split common

* Fixing handwired/xealous/rev1 compile error

* Removed unnecessary ifdef

1 files changed, 31 insertions, 2 deletions

diff --git a/quantum/encoder.c b/quantum/encoder.c
index 6629a098b..ddf6234ab 100644
--- a/quantum/encoder.c
+++ b/quantum/encoder.c
@@ -17,6 +17,10 @@
 
 #include "encoder.h"
 
+// for memcpy
+#include <string.h>
+
+
 #ifndef ENCODER_RESOLUTION
   #define ENCODER_RESOLUTION 4
 #endif
@@ -35,7 +39,13 @@ static pin_t encoders_pad_b[NUMBER_OF_ENCODERS] = ENCODERS_PAD_B;
 static int8_t encoder_LUT[] = { 0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0 };
 
 static uint8_t encoder_state[NUMBER_OF_ENCODERS] = {0};
+
+#ifdef SPLIT_KEYBOARD
+// slave half encoders come over as second set of encoders
+static int8_t encoder_value[NUMBER_OF_ENCODERS * 2] = {0};
+#else
 static int8_t encoder_value[NUMBER_OF_ENCODERS] = {0};
+#endif
 
 __attribute__ ((weak))
 void encoder_update_user(int8_t index, bool clockwise) { }
@@ -60,11 +70,30 @@ void encoder_read(void) {
     encoder_state[i] |= (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
     encoder_value[i] += encoder_LUT[encoder_state[i] & 0xF];
     if (encoder_value[i] >= ENCODER_RESOLUTION) {
-        encoder_update_kb(i, COUNTRECLOCKWISE);
+        encoder_update_kb(i, false);
     }
     if (encoder_value[i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise
-        encoder_update_kb(i, CLOCKWISE);
+        encoder_update_kb(i, true);
     }
     encoder_value[i] %= ENCODER_RESOLUTION;
   }
 }
+
+#ifdef SPLIT_KEYBOARD
+void encoder_state_raw(uint8_t* slave_state) {
+  memcpy(slave_state, encoder_state, sizeof(encoder_state));
+}
+
+void encoder_update_raw(uint8_t* slave_state) {
+  for (int i = 0; i < NUMBER_OF_ENCODERS; i++) {
+    encoder_value[NUMBER_OF_ENCODERS + i] += encoder_LUT[slave_state[i] & 0xF];
+    if (encoder_value[NUMBER_OF_ENCODERS + i] >= ENCODER_RESOLUTION) {
+        encoder_update_kb(NUMBER_OF_ENCODERS + i, false);
+    }
+    if (encoder_value[NUMBER_OF_ENCODERS + i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise
+        encoder_update_kb(NUMBER_OF_ENCODERS + i, true);
+    }
+    encoder_value[NUMBER_OF_ENCODERS + i] %= ENCODER_RESOLUTION;
+  }
+}
+#endif