Move more UART-based keyboards to use timeout correctly. (#17329)

Co-authored-by: Tomasz Janeczko <tomasz.j@hey.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/keyboards/mitosis/matrix.c b/keyboards/mitosis/matrix.c
index a92c3e8431..e5389bb113 100644
--- a/keyboards/mitosis/matrix.c
+++ b/keyboards/mitosis/matrix.c
@@ -20,6 +20,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #include "matrix.h"
 #include "uart.h"
 
+#define UART_MATRIX_RESPONSE_TIMEOUT 10000
+
 void matrix_init_custom(void) {
     uart_init(1000000);
 }
@@ -34,18 +36,23 @@ bool matrix_scan_custom(matrix_row_t current_matrix[]) {
     //trust the external keystates entirely, erase the last data
     uint8_t uart_data[11] = {0};
 
-    //there are 10 bytes corresponding to 10 columns, and an end byte
+    //there are 10 bytes corresponding to 10 columns, and then an end byte
     for (uint8_t i = 0; i < 11; i++) {
         //wait for the serial data, timeout if it's been too long
         //this only happened in testing with a loose wire, but does no
         //harm to leave it in here
         while (!uart_available()) {
             timeout++;
-            if (timeout > 10000) {
+            if (timeout > UART_MATRIX_RESPONSE_TIMEOUT) {
                 break;
             }
         }
-        uart_data[i] = uart_read();
+
+        if (timeout < UART_MATRIX_RESPONSE_TIMEOUT) {
+            uart_data[i] = uart_read();
+        } else {
+            uart_data[i] = 0x00;
+        }
     }
 
     //check for the end packet, the key state bytes use the LSBs, so 0xE0