prepare avr for stm32 (#104)

hid/lib/drivers/spi.h

@@ -0,0 +1,32 @@
+/*****************************************************************************
+#                                                                            #
+#    KVMD - The main PiKVM daemon.                                           #
+#                                                                            #
+#    Copyright (C) 2018-2022  Maxim Devaev <mdevaev@gmail.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 <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+*****************************************************************************/
+
+
+#pragma once
+
+#include <Arduino.h>
+#include <SPI.h>
+
+
+void spiBegin();
+bool spiReady();
+const uint8_t *spiGet();
+void spiWrite(const uint8_t *data);

hid/lib/drivers/storage.h

@@ -23,6 +23,7 @@
 #pragma once
 
 #include "driver.h"
+#include "stdlib.h"
 
 
 namespace DRIVERS {