button to clear save data

codicusmaximus · Mar 3, 2016 · f673b65 · f673b65
1 parent 7e0fdfe
commit f673b65
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Showing 4 changed files with 52 additions and 13 deletions.
diff --git a/include/interface.h b/include/interface.h
@@ -21,6 +21,7 @@
 #define CHANNEL_X                  (4)
 
 #define SAVE_BUTTON_INDEX          (81)
+#define CLEAR_BUTTON_INDEX         (11)
 
 #define CHECKBOX_ROW               (7)
 #define CHECKBOX_ROW_INDEX         (81)

diff --git a/include/serializer.h b/include/serializer.h
@@ -9,5 +9,6 @@ extern const uint16_t DATA_VERSION;
 
 void serialize_app();
 void deserialize_app();
+void serialize_clear();
 
 #endif
diff --git a/src/seq.c b/src/seq.c
@@ -90,7 +90,8 @@ void session_mode_become_inactive()
 
 void session_setup_become_active()
 {
-    plot_pad(SAVE_BUTTON_INDEX, number_colors[0]);
+    plot_pad(SAVE_BUTTON_INDEX, number_colors[1]);
+    plot_pad(CLEAR_BUTTON_INDEX, number_colors[1]);
 } 
 
 void session_setup_become_inactive()
@@ -158,7 +159,19 @@ uint8_t session_setup_handle_press(uint8_t index, uint8_t value)
         }
         else
         {
-            plot_pad(SAVE_BUTTON_INDEX, number_colors[1]);
+            plot_pad(SAVE_BUTTON_INDEX, number_colors[2]);
+        }
+    }
+    else if (index == CLEAR_BUTTON_INDEX)
+    {
+        if (value > 0)
+        {
+            plot_pad(CLEAR_BUTTON_INDEX, on_color);
+            serialize_clear();
+        }
+        else
+        {
+            plot_pad(CLEAR_BUTTON_INDEX, number_colors[0]);
         }
     }
     else

diff --git a/src/serializer.c b/src/serializer.c
@@ -84,6 +84,25 @@ const uint16_t DATA_VERSION = 1;
 #define read_bytes(d)   { hal_read_flash(offset, (uint8_t*)&(d), sizeof(d));   \
                           offset += sizeof(d); }
 
+uint8_t is_data_saved()
+{
+    uint16_t temp;
+
+    hal_read_flash(0, (uint8_t*)&temp, sizeof(temp));
+    if (temp != APP_ID)
+    {
+        return 0;
+    }
+
+    hal_read_flash(sizeof(temp), (uint8_t*)&temp, sizeof(temp));
+    if (temp != DATA_VERSION)
+    {
+        return 0;
+    }
+
+    return 1;
+}
+
 /*******************************************************************************
  * Serializer
  ******************************************************************************/
@@ -138,27 +157,32 @@ void serialize_app()
     write_bytes(lp_note_bank);
 }
 
+void serialize_clear()
+{
+    if (!is_data_saved())
+    {
+        return;
+    }
+
+    uint16_t temp = 0;
+    hal_write_flash(0, (uint8_t*)&temp, sizeof(temp));
+    hal_write_flash(sizeof(temp), (uint8_t*)&temp, sizeof(temp));
+}
+
 /*******************************************************************************
  * Deserializer
  ******************************************************************************/
 
 void deserialize_app()
 {
-    uint32_t offset = 0;
-    uint16_t temp16 = 0;
-    uint8_t temp8 = 0;
-
-    read_bytes(temp16);
-    if (temp16 != APP_ID)
+    if (!is_data_saved())
     {
         return;
     }
 
-    read_bytes(temp16);
-    if (temp16 != DATA_VERSION)
-    {
-        return;
-    }
+    uint32_t offset = sizeof(APP_ID) + sizeof(DATA_VERSION);
+    uint16_t temp16 = 0;
+    uint8_t temp8 = 0;
 
     read_bytes(lp_midi_port);
     read_bytes(lp_rcv_clock_port);