refactor services, increase max sockets - release

components/services/buttons.h

@@ -0,0 +1,35 @@
+/* 
+ *  (c) Philippe G. 2019, philippe_44@outlook.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#pragma once
+ 
+// button type (pressed = LOW or HIGH)
+#define BUTTON_LOW 		0
+#define BUTTON_HIGH		1
+
+typedef enum { BUTTON_PRESSED, BUTTON_RELEASED } button_event_e; 
+typedef enum { BUTTON_NORMAL, BUTTON_SHIFTED } button_press_e; 
+typedef void (*button_handler)(void *id, button_event_e event, button_press_e mode, bool long_press);
+
+/* 
+set long_press to 0 for no long-press
+set shifter_gpio to -1 for no shift
+NOTE: shifter buttons *must* be created before shiftee
+*/
+
+void button_create(void *id, int gpio, int type, bool pull, button_handler handler, int long_press, int shifter_gpio);