single-page flash storage

1 files changed, 30 insertions, 8 deletions

diff --git a/src/app.c b/src/app.c
index f0edec8..e250cd3 100644
--- a/src/app.c
+++ b/src/app.c
@@ -41,6 +41,15 @@
 //
 // This is where the fun is!  Add your code to the callbacks below to define how
 // your app behaves.
+//
+// In this example, we store all button states in an array, which we sometimes
+// save to flash.
+//______________________________________________________________________________
+
+#define BUTTON_COUNT 100
+
+u8 g_Buttons[BUTTON_COUNT] = {0};
+
 //______________________________________________________________________________
 
 void app_surface_event(u8 type, u8 index, u8 value)
@@ -49,16 +58,28 @@ void app_surface_event(u8 type, u8 index, u8 value)
         {
                 case  TYPEPAD:
                 {
-                        // example - light / extinguish pad LEDs, send MIDI
-                        hal_plot_led(TYPEPAD, index, value, value, value);
+                        // toggle it and store it off, so we can save to flash if we want to
+                        if (value)
+                        {
+                                g_Buttons[index] = MAXLED * !g_Buttons[index];
+                        }
+                        
+                        // example - light / extinguish pad LEDs
+                        hal_plot_led(TYPEPAD, index, 0, 0, g_Buttons[index]);
+                        
+                        // example - send MIDI
                         hal_send_midi(DINMIDI, NOTEON | 0, index, value);
+                        
                 }
                 break;
 
                 case TYPESETUP:
                 {
-                        // example - light the setup LED
-                        hal_plot_led(TYPESETUP, 0, value, value, value);
+                        if (value)
+                        {
+                                // save button states to flash (reload them by power cycling the hardware!)
+                                hal_write_flash(0, g_Buttons, BUTTON_COUNT);
+                        }
                 }
                 break;
         }
@@ -137,16 +158,17 @@ void app_timer_event()
 
 void app_init()
 {
+        // example - load button states from flash
+        hal_read_flash(0, g_Buttons, BUTTON_COUNT);
+        
     // example - light the LEDs to say hello!
         for (int i=0; i < 10; ++i)
         {
                 for (int j=0; j < 10; ++j)
                 {
-                        u8 r = i < 5 ? (MAXLED * (5-i))/5 : 0;
-                        u8 g = i < 5 ? (MAXLED * i)/5 : (MAXLED * (10-i))/5;
-                        u8 b = i < 5 ? 0 : (MAXLED * (i-5))/5;
+                        u8 b = g_Buttons[j*10 + i];
 
-                        hal_plot_led(TYPEPAD, j*10 + i, r, b, g);
+                        hal_plot_led(TYPEPAD, j*10 + i, 0, 0, b);
                 }
         }
 }