unsigned char big_motor; //Small vibration motor value of DualShock2 unsigned char small_motor; //Big vibration motor value of DualShock2 unsigned char DS2_data[17]; //Buffer to receive DualShock2's Data //Pin definition of Enbedded PsJoyCon #define SEL P3_2 #define CLK P3_3 #define RDY P3_4 //Data order of Enbedded PsJoyCon #define DS2_LX 0 #define DS2_LY 1 #define DS2_RX 2 #define DS2_RY 3 #define DS2_X 4 #define DS2_S 5 #define

Example RS232 interface schematic of ePSC.   http://www.exinterface.com/d/man/epsc/ePSC_RS232_schematic.pdf.pdf  

Example interface schematic of ePSC and MCU.

Documents of ePSC   http://www.exinterface.com/d/man/epsc/ePSC_schematic.pdf http://www.exinterface.com/d/man/epsc/ePSC_Code.pdf http://www.exinterface.com/d/man/epsc/ePSC_Code_eng.pdf http://www.exinterface.com/d/man/epsc/ePSC_RS232_schematic.pdf http://www.exinterface.com/d/man/epsc/ePSC2_UserGuide_Eng.pdf http://www.exinterface.com/d/man/epsc/ePSC2_UserGuide_Kor.pdf http://www.exinterface.com/d/man/epsc/ePSC2_UserGuide_Eng.pdf http://www.exinterface.com/d/man/epsc/ePSC2_UserGuide_Kor.pdf  

PS2-3CH User Guide http://www.exinterface.com/d/man/ps23ch/PS2-3CH_UserGuide_eng.pdf  

User Guide of USb3CHr1 http://www.exinterface.com/d/man/usb3chr1/USB-3CH_R1_UserGuide_Eng.pdf