diff --git a/numworks_port/README.md b/numworks_port/README.md
index 8746b7b..e3da20b 100644
--- a/numworks_port/README.md
+++ b/numworks_port/README.md
@@ -12,7 +12,7 @@ This is a bare metal os attempt on the numworks n0110
 ### Zeta bare minimum
 - [x] Working thing
 - [x] Led interface
-- [ ] Keyboard interface
+- [x] Keyboard interface
 - [ ] Set clock and all
     - [ ] adapt ms_wait() and us_wait()
 - [ ] Screen interface
diff --git a/numworks_port/build/Laplace/keyboard.o b/numworks_port/build/Laplace/keyboard.o
index 224bddf..c52184b 100644
Binary files a/numworks_port/build/Laplace/keyboard.o and b/numworks_port/build/Laplace/keyboard.o differ
diff --git a/numworks_port/build/Laplace/laplace.o b/numworks_port/build/Laplace/laplace.o
index 2cb6cb8..ac29955 100644
Binary files a/numworks_port/build/Laplace/laplace.o and b/numworks_port/build/Laplace/laplace.o differ
diff --git a/numworks_port/build/main.bin b/numworks_port/build/main.bin
index db693a4..632f485 100755
Binary files a/numworks_port/build/main.bin and b/numworks_port/build/main.bin differ
diff --git a/numworks_port/build/main.elf b/numworks_port/build/main.elf
index efdedea..e8a3275 100755
Binary files a/numworks_port/build/main.elf and b/numworks_port/build/main.elf differ
diff --git a/numworks_port/build/main.o b/numworks_port/build/main.o
index 00bb825..1f8ae0c 100644
Binary files a/numworks_port/build/main.o and b/numworks_port/build/main.o differ
diff --git a/numworks_port/build/start_handler.o b/numworks_port/build/start_handler.o
index 5ffb610..37f6436 100644
Binary files a/numworks_port/build/start_handler.o and b/numworks_port/build/start_handler.o differ
diff --git a/numworks_port/src/Laplace/keyboard.c b/numworks_port/src/Laplace/keyboard.c
index 46f2e13..ced4e49 100644
--- a/numworks_port/src/Laplace/keyboard.c
+++ b/numworks_port/src/Laplace/keyboard.c
@@ -41,6 +41,7 @@
 
 const uint8_t number_of_rows = 9;
 const uint8_t number_of_columns = 6;
+const char row_list[9] = {'B', 'A', 'C', 'D', 'E', 'F', 'G', 'H', 'I'};
 
 void keyboard_init(){
     for (int i = 0; i < number_of_rows; i++){
@@ -57,12 +58,6 @@ void keyboard_init(){
     }
 }
 
-bool keyboard_scan(){
-    set_output_pin(GPIO_A, 6, true);
-    bool key_state = read_input_pin(GPIO_C, 3);
-    return key_state; 
-    // A LOT TODO
-}
 
 void activate_row(uint8_t row_nb){
     // set all row to 0 and then reenable selected row
@@ -71,4 +66,22 @@ void activate_row(uint8_t row_nb){
     }
     set_output_pin(GPIO_A, row_nb, false);
     us_wait(100);
-}
\ No newline at end of file
+}
+
+struct button* keyboard_scan(){
+    static struct button result_button_list[54] = {};
+    uint8_t i = 0;
+    for(int r = 0; r < number_of_rows; r++){
+        activate_row(r);
+        
+        for(int c = 0; c < number_of_columns; c++){
+            bool key_state = read_input_pin(GPIO_C, c);
+            result_button_list[i].row = row_list[r];
+            result_button_list[i].column = c + 1;
+            result_button_list[i].state = key_state;
+            i++;
+        }
+    }
+    return result_button_list;
+}
+
diff --git a/numworks_port/src/Laplace/keyboard.h b/numworks_port/src/Laplace/keyboard.h
index 32d7b97..a06b45b 100644
--- a/numworks_port/src/Laplace/keyboard.h
+++ b/numworks_port/src/Laplace/keyboard.h
@@ -7,21 +7,16 @@
 #ifndef KEYBOARD_H
 #define KEYBOARD_H
 
-enum PIN_ROW {
-	A = 1,
-	B = 0,
-	C = 2,
-    D = 3,
-	E = 4,
-	F = 5,
-    G = 6,
-	H = 7,
-	I = 8
-};
-
 #include "gpio_helper.h"
 
+struct button{
+	uint8_t column;
+	char row;
+	bool state;
+};
+
+
 void keyboard_init();
-bool keyboard_scan();
+struct button* keyboard_scan();
 
 #endif
\ No newline at end of file
diff --git a/numworks_port/src/main.c b/numworks_port/src/main.c
index 81f4906..9bf2e4e 100644
--- a/numworks_port/src/main.c
+++ b/numworks_port/src/main.c
@@ -8,11 +8,17 @@ void main_entry(){
     set_led_green(true);
     while (1)
     {
-        /*if(keyboard_scan()){
-            set_led_green(true);
-        }else{
-            set_led_green(false);
-        }*/
+        struct button * keyboard_state = keyboard_scan();
+        for(int i =0; i < 54; i++){
+            if(keyboard_state[i].column == 4 && keyboard_state[i].row == 'H'){
+                if(keyboard_state[i].state){
+                    set_led_green(true);
+                }else{
+                    set_led_green(false);
+                }
+                break;
+            }
+        }
     }
     
 }
\ No newline at end of file