Added first draft of "pins" project

gpio/pins/L6_Blue_CS(CE)_PB2.txt

@@ -0,0 +1,10 @@
+For SPI, libraries do not treat as CS (although it is shown in some diagrams.) This is just a GPIO pin, but it typically get connected to "CE" (for Chip Enable -- e.g. take chip out of standby.)  It is typically logic LOW.  On the CC1101 it is used for GDO0 (general purpose IRQ).
+
+Generic GPIO uses PB2.
+
+CHECK: "LPTIM1.OUT/COMP1 IN+"
+
+Devices:
+- NRF24L01[SPI] (CE)
+- NRF24L02[SPI] (CE)
+- CC1101[SPI] (GDO0)