MindSensors PSP-Nx button set 2 constants

PSP_BTNSET2_CIRCLE PSP_BTNSET2_CROSS PSP_BTNSET2_L1 PSP_BTNSET2_L2 PSP_BTNSET2_R1 PSP_BTNSET2_R2 PSP_BTNSET2_SQUARE PSP_BTNSET2_TRIANGLE

#define PSP_BTNSET2_L1   0x04 The PSP-Nx button set 2 L1