Make PCB args are now SKY9X and GRUVIN9X instead of ARM and V4

[sky9x] Temperature calibration
[sky9x] RTC modifications

src/sky9x/rtc_driver.cpp

@@ -0,0 +1,61 @@
+/*
+ * Authors (alphabetical order)
+ * - Bertrand Songis <bsongis@gmail.com>
+ * - Bryan J. Rentoul (Gruvin) <gruvin@gmail.com>
+ * - Cameron Weeks <th9xer@gmail.com>
+ * - Erez Raviv
+ * - Jean-Pierre Parisy
+ * - Karl Szmutny <shadow@privy.de>
+ * - Michael Blandford
+ * - Michal Hlavinka
+ * - Pat Mackenzie
+ * - Philip Moss
+ * - Rob Thomson
+ * - Romolo Manfredini <romolo.manfredini@gmail.com>
+ * - Thomas Husterer
+ *
+ * open9x is based on code named
+ * gruvin9x by Bryan J. Rentoul: http://code.google.com/p/gruvin9x/,
+ * er9x by Erez Raviv: http://code.google.com/p/er9x/,
+ * and the original (and ongoing) project by
+ * Thomas Husterer, th9x: http://code.google.com/p/th9x/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ */
+
+#include "../open9x.h"
+
+struct t_i2cTime
+{
+  uint8_t setCode ;
+  uint8_t Time[7] ;
+} I2CTime ;
+
+void rtc_settime(struct gtm * t)
+{
+  g_rtcTime = gmktime(t); // update local timestamp and get wday calculated
+  g_ms100 = 0; // start of next second begins now
+
+  I2CTime.setCode = 0x74 ;    // Tiny SET TIME CODE command
+  I2CTime.Time[0] = t->tm_sec ;
+  I2CTime.Time[1] = t->tm_min ;
+  I2CTime.Time[2] = t->tm_hour ;
+  I2CTime.Time[3] = t->tm_mday ;
+  I2CTime.Time[4] = t->tm_mon+1 ;
+  I2CTime.Time[5] = (uint8_t) (t->tm_year+1900) ;
+  I2CTime.Time[6] = (t->tm_year+1900) >> 8 ;
+  write_coprocessor( (uint8_t *) &I2CTime, 8 ) ;
+}
+
+void rtc_init()
+{
+  read_coprocessor();
+}