3 files changed, 23 insertions, 0 deletions
diff --git a/keyboards/ergodox_ez/matrix.c b/keyboards/ergodox_ez/matrix.c
index 9c1efa1d05..dc29cf5cd0 100644
--- a/keyboards/ergodox_ez/matrix.c
+++ b/keyboards/ergodox_ez/matrix.c
@@ -39,6 +39,17 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include  "timer.h"
 #endif
 
+/*
+ * This constant define not debouncing time in msecs, but amount of matrix
+ * scan loops which should be made to get stable debounced results.
+ *
+ * On Ergodox matrix scan rate is relatively low, because of slow I2C.
+ * Now it's only 317 scans/second, or about 3.15 msec/scan.
+ * According to Cherry specs, debouncing time is 5 msec.
+ *
+ * And so, there is no sense to have DEBOUNCE higher than 2.
+ */
+
 #ifndef DEBOUNCE
 #   define DEBOUNCE	5
 #endif
@@ -181,6 +192,7 @@ uint8_t matrix_scan(void)
     if (debouncing) {
         if (--debouncing) {
             wait_us(1);
+            // this should be wait_ms(1) but has been left as-is at EZ's request
         } else {
             for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
                 matrix[i] = matrix_debouncing[i];
diff --git a/keyboards/infinity_ergodox/Makefile b/keyboards/infinity_ergodox/Makefile
index fb21aae5eb..efa32e037d 100644
--- a/keyboards/infinity_ergodox/Makefile
+++ b/keyboards/infinity_ergodox/Makefile
@@ -66,6 +66,7 @@ COMMAND_ENABLE ?= yes    # Commands for debug and configuration
 SLEEP_LED_ENABLE ?= yes  # Breathing sleep LED during USB suspend
 NKRO_ENABLE ?= yes	    # USB Nkey Rollover
 CUSTOM_MATRIX ?= yes # Custom matrix file
+SERIAL_LINK_ENABLE = yes
 
 ifndef QUANTUM_DIR
 	include ../../Makefile
diff --git a/keyboards/infinity_ergodox/infinity_ergodox.c b/keyboards/infinity_ergodox/infinity_ergodox.c
index 34aded1a73..85054775e8 100644
--- a/keyboards/infinity_ergodox/infinity_ergodox.c
+++ b/keyboards/infinity_ergodox/infinity_ergodox.c
@@ -1 +1,11 @@
 #include "infinity_ergodox.h"
+#include "ch.h"
+#include "hal.h"
+#include "serial_link/system/serial_link.h"
+
+void init_serial_link_hal(void) {
+    PORTA->PCR[1] = PORTx_PCRn_PE | PORTx_PCRn_PS | PORTx_PCRn_PFE | PORTx_PCRn_MUX(2);
+    PORTA->PCR[2] = PORTx_PCRn_DSE | PORTx_PCRn_SRE | PORTx_PCRn_MUX(2);
+    PORTE->PCR[0] = PORTx_PCRn_PE | PORTx_PCRn_PS | PORTx_PCRn_PFE | PORTx_PCRn_MUX(3);
+    PORTE->PCR[1] = PORTx_PCRn_DSE | PORTx_PCRn_SRE | PORTx_PCRn_MUX(3);
+}