Adding initial Teensy 3 support, compiles, but not fully functional yet.

- CDC Output seems to be working
- USB Keyboard output has not been tested, but is "ready"
- UART and Timers have not been tested, or fully utilized
- Issues using Timer 0
- Initial template for MBC-55X Scan module (only module currently compatible with the arm build)
- Updated the interface to the AVR usb module for symmetry with the ARM usb module
- Much gutting was done to the Teensy 3 usb keyboard module, though not in an ideal state yet

Lib/aliased_bitband.h

@@ -0,0 +1,37 @@
+
+#ifndef __aliased_bitband_h
+#define __aliased_bitband_h
+
+
+// Aliased Regions for single bit (0th) register access
+
+// Chapter 4: Memory Map (Table 4-1)
+
+
+
+// TODO
+// - Not all tested, and not all sections added
+
+
+
+// 0x2200 0000 - 0x23FF FFFF - Aliased to SRAM_U bitband
+// TODO
+
+
+
+// 0x4200 0000 - 0x43FF FFFF - Aliased to AIPS and GPIO bitband
+#define GPIO_BITBAND_ADDR(reg, bit) (((uint32_t)&(reg) - 0x40000000) * 32 + (bit) * 4 + 0x42000000)
+#define GPIO_BITBAND_PTR(reg, bit) ((uint32_t *)GPIO_BITBAND_ADDR((reg), (bit)))
+
+// XXX - Only MODREG is tested to work...
+#define GPIO_BITBAND_OUTREG(reg, bit) *((uint32_t *)GPIO_BITBAND_ADDR((reg), (bit)) +   0)
+#define GPIO_BITBAND_SETREG(reg, bit) *((uint32_t *)GPIO_BITBAND_ADDR((reg), (bit)) +  32)
+#define GPIO_BITBAND_CLRREG(reg, bit) *((uint32_t *)GPIO_BITBAND_ADDR((reg), (bit)) +  64)
+#define GPIO_BITBAND_TOGREG(reg, bit) *((uint32_t *)GPIO_BITBAND_ADDR((reg), (bit)) +  96)
+#define GPIO_BITBAND_INPREG(reg, bit) *((uint32_t *)GPIO_BITBAND_ADDR((reg), (bit)) + 128)
+#define GPIO_BITBAND_MODREG(reg, bit) *((uint32_t *)GPIO_BITBAND_ADDR((reg), (bit)) + 160)
+
+
+
+#endif
+