adding support for board revision 2.5 with 3G modem variant

Author: ppescher

sam/1.0.4/boards.txt

@@ -26,6 +26,8 @@ geolink_opentracker.build.pid=0x003e
 ## Menu Additions
 
 menu.HWVersion=Board Version
+geolink_opentracker.menu.HWVersion.ver_2_5=OpenTracker 2.5 (3G)
+geolink_opentracker.menu.HWVersion.ver_2_5.build.extra_flags=-D__SAM3A4C__ -mthumb {build.usb_flags} -DOPENTRACKER_HW_REV=0x0250
 geolink_opentracker.menu.HWVersion.ver_2_4=OpenTracker 2.4
 geolink_opentracker.menu.HWVersion.ver_2_4.build.extra_flags=-D__SAM3A4C__ -mthumb {build.usb_flags} -DOPENTRACKER_HW_REV=0x0240
 geolink_opentracker.menu.HWVersion.ver_2_3=OpenTracker 2.3

sam/1.0.4/variants/geolink_opentracker/variant.h

@@ -239,8 +239,9 @@ static const uint8_t CANTX = 33;
 #define PIN_GSM_VDD_EXT 24
 #define ANALOG_VREF     3.40
 #define MODEM_VBAT      4.13
+#define MODEM_M95       1
 #else
-// HW Revision 2.4
+// HW Revision 2.4 (and later)
 // dropped "REBOOT" pin and "GSM VDD" (unused)
 // moved "RING" to wakeup capable pins
 // added "INx_PD" pull-down enable pins, to change analog input range
@@ -249,6 +250,18 @@ static const uint8_t CANTX = 33;
 #define PIN_C_IN2_PD    39
 #define ANALOG_VREF     3.31
 #define MODEM_VBAT      4.36
+#if (OPENTRACKER_HW_REV == 0x0250)
+#define MODEM_UG96      1
+#else
+#define MODEM_M95       1
+#endif
+#endif
+
+#ifndef MODEM_UG96
+#define MODEM_UG96      0
+#endif
+#ifndef MODEM_M95
+#define MODEM_M95       0
 #endif
 
 #define AIN_S_INLEVEL   49