Interconnectivity Page 3 of 22 Firmware Programming guide for PDIUSBD12 Table of contents 1 INTRODUCTION 2 ARCHITECTURE 2. 1 FIRMWARE STRUCTURE 1. Hardware Abstraction Layer- EPPHAL C 2.1.2 PDIUSBD/2 Command Interface-DI2CIC 2.1.3 Interrupt Service Routine-ISRC 2.1.4 Main Loop- MAINLOOP C 455555666 2.1.5 Protocol Laver-CHAP 9.C. PROTODMA C. 2.2 PORTING THE FIRMWARE TO OTHER CPU PLATFORM 2.3 USING THE FIRMWARE IN POLLING MODE 3 HARDWARE ABSTRACTION LAYER 4 PDIUSBD12 COMMAND INTERFACE 5 INTERRUPT SERVICE ROUTINE 667789 5.1 BUS RESET AND SUSPEND CHANGE 5.2 CONTROL ENDPOINT HANDLER 5.3 GENERIC ENDPOINT HANDLER 5. 4 MAIN ENDPOINT HANDLER 5.5 EOT HANDLER o3334 6 MAIN LOOP 7 CHAPTER 9 PROTOCOL 7.1 CLEAR FEATURE REQUEST 7.2 GET STATUS REQUEST. 7.3 SET ADDRESS REQUEST 16 4 GET CONFIG REQUEST 7.5 GET DESCRIPTOR REQUEST 7.6 SET CONFIG REQUEST 7.7 GET/SET INTERFACE REQUEST 18 7.8 SET FEATURE REQUEST 8 DMA SUPPORT 8.1 INTRODUCTION TO PROTOCOL BASED DMA OPERATION 8.2 DEVICES DMA STATES 8.3 DMA CONFIGURATION REGISTER 8.4 SETUP DMA REQUEST 8.5 HOST SIDE PROGRAMMING CONSIDERATIONS Philips Semiconductors- Asia Product Innovation CentreInterconnectivity Page 3 of 22 Firmware Programming Guide for PDIUSBD12 _______________________________________________________________________________________________ Philips Semiconductors - Asia Product Innovation Centre Visit http://www.flexiusb.com Table of Contents 1 INTRODUCTION........................................................................................................................................... 4 2 ARCHITECTURE.......................................................................................................................................... 5 2.1 FIRMWARE STRUCTURE ............................................................................................................................... 5 2.1.1 Hardware Abstraction Layer - EPPHAL.C ........................................................................................... 5 2.1.2 PDIUSBD12 Command Interface - D12CI.C........................................................................................ 5 2.1.3 Interrupt Service Routine - ISR.C ......................................................................................................... 5 2.1.4 Main Loop - MAINLOOP.C ................................................................................................................. 6 2.1.5 Protocol Layer - CHAP_9.C, PROTODMA.C....................................................................................... 6 2.2 PORTING THE FIRMWARE TO OTHER CPU PLATFORM ................................................................................... 6 2.3 USING THE FIRMWARE IN POLLING MODE .................................................................................................... 6 3 HARDWARE ABSTRACTION LAYER ....................................................................................................... 7 4 PDIUSBD12 COMMAND INTERFACE........................................................................................................ 7 5 INTERRUPT SERVICE ROUTINE .............................................................................................................. 8 5.1 BUS RESET AND SUSPEND CHANGE.............................................................................................................. 9 5.2 CONTROL ENDPOINT HANDLER.................................................................................................................. 10 5.3 GENERIC ENDPOINT HANDLER................................................................................................................... 13 5.4 MAIN ENDPOINT HANDLER........................................................................................................................ 13 5.5 EOT HANDLER ......................................................................................................................................... 13 6 MAIN LOOP................................................................................................................................................. 14 7 CHAPTER 9 PROTOCOL........................................................................................................................... 15 7.1 CLEAR FEATURE REQUEST ........................................................................................................................ 15 7.2 GET STATUS REQUEST............................................................................................................................... 16 7.3 SET ADDRESS REQUEST............................................................................................................................. 16 7.4 GET CONFIG REQUEST............................................................................................................................... 17 7.5 GET DESCRIPTOR REQUEST ....................................................................................................................... 17 7.6 SET CONFIG REQUEST ............................................................................................................................... 18 7.7 GET/SET INTERFACE REQUEST................................................................................................................... 18 7.8 SET FEATURE REQUEST ............................................................................................................................. 19 8 DMA SUPPORT............................................................................................................................................ 20 8.1 INTRODUCTION TO PROTOCOL BASED DMA OPERATION ............................................................................ 20 8.2 DEVICE'S DMA STATES............................................................................................................................. 20 8.3 DMA CONFIGURATION REGISTER.............................................................................................................. 21 8.4 SETUP DMA REQUEST .............................................................................................................................. 21 8.5 HOST SIDE PROGRAMMING CONSIDERATIONS............................................................................................. 22