Update to xealousbrown. (#8215)

* Update to xealousbrown.

5-13ms Latency decrease, 4x scan rate improvement.
(CUSTOM_MATRIX = lite) is a really great feature!

* Updated Readme.md, added an extra speedhack.

* More optimizations

* Update keyboards/handwired/xealousbrown/rules.mk

* Update keyboards/handwired/xealousbrown/rules.mk

1 files changed, 41 insertions, 0 deletions

diff --git a/keyboards/handwired/xealousbrown/xealousbrown.c b/keyboards/handwired/xealousbrown/xealousbrown.c
index 5c8e2fb18a..39def8ade4 100644
--- a/keyboards/handwired/xealousbrown/xealousbrown.c
+++ b/keyboards/handwired/xealousbrown/xealousbrown.c
@@ -6,3 +6,44 @@ void matrix_init_kb(void) {
 
 	matrix_init_user();
 }
+
+
+
+#ifdef BENCHMARK_MATRIX
+#    include "timer.h"
+#    include <stdint.h>
+#    include <stdbool.h>
+#    include "wait.h"
+#    include "util.h"
+#    include "matrix.h"
+#    include "quantum.h"
+
+static int      scans          = 0;
+static uint16_t last_print_out = 0;
+static int      last_timer     = 0;
+void            matrix_scan_user(void) {
+    scans++;
+    uint16_t timer = timer_read();
+    
+    if (timer != last_timer && timer != last_timer + 1) {
+        print("MS:\n");
+        print_dec(timer);
+        print("->");
+        print_dec(last_timer);
+        print("\n");
+    }
+    
+    last_timer = timer;
+    if ((timer % 1000 == 0) && (timer != last_print_out)) {
+        print("Benchmark:");
+        print("\n");
+        print_dec(timer);
+        print("\n");
+        print_dec(scans);
+        print("\n");
+        print("-------");
+        scans          = 0;
+        last_print_out = timer;
+    }
+}
+#endif