Analog Devices VisualDSP++ 5.0 User manual

a
W5.0
Device Drivers and System Services
Manual for Blackfin®Processors
Revision 3.2, August 2008
Part Number
82-000430-01
Analog Devices, Inc.
One Technology Way
Norwood, Mass. 02062-9106

Copyright Information
©2008 Analog Devices, Inc., ALL RIGHTS RESERVED. This document
may not be reproduced in any form without prior, express written consent
from Analog Devices, Inc.
Printed in the USA.
Disclaimer
Analog Devices, Inc. reserves the right to change this product without
prior notice. Information furnished by Analog Devices is believed to be
accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use; nor for any infringement of patents or other rights of
third parties which may result from its use. No license is granted by impli-
cation or otherwise under the patent rights of Analog Devices, Inc.
Trademark and Service Mark Notice
The Analog Devices logo and icon bar, Blackfin, the Blackfin logo,
EZ-KIT Lite, SHARC, TigerSHARC, and VisualDSP++ are registered
trademarks of Analog Devices, Inc.
All other brand and product names are trademarks or service marks of
their respective owners.

VisualDSP++ 5.0 Device Drivers and System iii
Services Manual for Blackfin Processors
CONTENTS
PREFACE
Purpose of This Manual ............................................................... xxxi
Intended Audience ....................................................................... xxxi
Manual Contents Description ..................................................... xxxii
Technical or Customer Support .................................................. xxxiii
Supported Processors .................................................................. xxxiv
Product Information .................................................................. xxxiv
MyAnalog.com ..................................................................... xxxiv
Processor Product Information ............................................... xxxv
Related Documents .............................................................. xxxvi
Online Technical Documentation ........................................ xxxvii
Accessing Documentation From the Web ......................... xxxvii
Viewing Help Files .......................................................... xxxvii
Notation Conventions .............................................................. xxxviii
INTRODUCTION
System Services Overview .............................................................. 1-2
General ................................................................................... 1-3
Application Interface ............................................................... 1-7

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Services Manual for Blackfin Processors
Dependencies .......................................................................... 1-8
Initialization ......................................................................... 1-10
Termination .......................................................................... 1-10
System Services Directory and File Structure .......................... 1-11
Accessing the System Services API ..................................... 1-11
Linking in the System Services Library .............................. 1-13
Rebuilding the System Services Library ............................. 1-15
Examples .......................................................................... 1-16
Dual-Core Considerations ................................................ 1-16
RTOS Considerations ................................................................. 1-17
Interoperability of System Services With VDK ....................... 1-17
Deployment of Services Within a Multi-Threaded
Application ........................................................................ 1-18
Device Driver Overview .............................................................. 1-19
Application Interface ............................................................. 1-20
Device Driver Architecture .................................................... 1-21
Interaction With System Services ...................................... 1-23
Initialization ......................................................................... 1-23
Termination .......................................................................... 1-24
Device Driver Directory and File Structure ............................ 1-24
Accessing the Device Driver API ....................................... 1-25
Device Driver File Locations ............................................. 1-27
Linking in the Device Driver Library ................................ 1-28
Rebuilding the Device Driver Library ................................ 1-29
Examples on Distribution ................................................. 1-30

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Contents
INTERRUPT MANAGER
Introduction ................................................................................. 2-2
Interrupt Manager Initialization .................................................... 2-4
Interrupt Manager Termination ..................................................... 2-5
Core Event Controller Functions ................................................... 2-6
adi_int_CECHook() Function ................................................. 2-6
adi_int_CECUnhook() Function ............................................. 2-8
Interrupt Handlers .................................................................. 2-8
System Interrupt Controller Functions .......................................... 2-9
adi_int_SICDisable ............................................................... 2-10
adi_int_SICEnable ................................................................ 2-10
adi_int_SICGetIVG .............................................................. 2-10
adi_int_SICInterruptAsserted ................................................ 2-10
adi_int_SICSetIVG ............................................................... 2-11
adi_int_SICWakeup .............................................................. 2-11
Protecting Critical Code Regions ................................................. 2-12
Modifying IMASK ...................................................................... 2-14
Examples .................................................................................... 2-15
File Structure .............................................................................. 2-16
Interrupt Manager API Reference ................................................ 2-17
Notation Conventions ........................................................... 2-17
adi_int_Init ........................................................................... 2-18
adi_int_Terminate ................................................................. 2-19
adi_int_CECHook ................................................................ 2-20

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adi_int_CECUnhook ............................................................ 2-22
adi_int_ClearIMaskBits ........................................................ 2-24
adi_int_EnterCriticalRegion .................................................. 2-26
adi_int_ExitCriticalRegion .................................................... 2-28
adi_int_SICDisable ............................................................... 2-29
adi_int_SICEnable ................................................................ 2-30
adi_int_SICGetIVG .............................................................. 2-31
adi_int_SICInterruptAsserted ................................................ 2-32
adi_int_SICSetIVG .............................................................. 2-33
adi_int_SetIMaskBits ............................................................ 2-34
adi_int_SICWakeup .............................................................. 2-36
POWER MANAGEMENT MODULE
Introduction ................................................................................. 3-2
PM Module Operation – Getting Started ...................................... 3-3
Dual-Core Considerations ............................................................ 3-5
Using Automatic Synchronization ........................................... 3-5
Synchronization Requirement .................................................. 3-6
Running Applications on One Core Only ................................ 3-7
Running Applications on Both Cores ....................................... 3-8
Synchronization Between Cores ............................................. 3-10
Built-In Lock Variable and Linking Considerations ................ 3-10
SDRAM Initialization Prior to Loading an Executable ................. 3-13

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Contents
Power Management API Reference .............................................. 3-15
Notation Conventions ........................................................... 3-15
adi_pwr_AdjustFreq .............................................................. 3-16
adi_pwr_Control ................................................................... 3-18
adi_pwr_GetConfigSize ......................................................... 3-20
adi_pwr_GetFreq .................................................................. 3-21
adi_pwr_GetPowerMode ....................................................... 3-22
adi_pwr_GetPowerSaving ...................................................... 3-23
adi_pwr_Init ......................................................................... 3-24
adi_pwr_LoadConfig ............................................................. 3-30
adi_pwr_Reset ....................................................................... 3-31
adi_pwr_SaveConfig .............................................................. 3-32
adi_pwr_SetFreq ................................................................... 3-33
adi_pwr_SetMaxFreqForVolt ................................................. 3-35
adi_pwr_SetPowerMode ........................................................ 3-36
adi_pwr_SetVoltageRegulator ................................................ 3-38
Public Data Types and Enumerations ........................................... 3-42
ADI_PWR_COMMAND ..................................................... 3-42
ADI_PWR_COMMAND_PAIR ........................................... 3-47
ADI_PWR_CSEL ................................................................. 3-47
ADI_PWR_DF ..................................................................... 3-48
ADI_PWR_INPUT_DELAY ................................................. 3-48
ADI_PWR_OUTPUT_DELAY ............................................. 3-48
ADI_PWR_MODE .............................................................. 3-49

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ADI_PWR_PACKAGE_KIND ............................................. 3-49
ADI_PWR_PCC133_COMPLIANCE .................................. 3-50
ADI_PWR_PROC_KIND .................................................... 3-50
ADI_PWR_RESULT ............................................................ 3-50
ADI_PWR_SSEL .................................................................. 3-52
ADI_PWR_VDDEXT .......................................................... 3-53
ADI_PWR_VLEV ................................................................ 3-53
ADI_PWR_VR_CANWE ..................................................... 3-54
ADI_PWR_VR_USBWE ...................................................... 3-54
ADI_PWR_VR_CKELOW ................................................... 3-54
ADI_PWR_VR_CLKBUFOE ............................................... 3-55
ADI_PWR_VR_FREQ ......................................................... 3-55
ADI_PWR_VR_GAIN ......................................................... 3-55
ADI_PWR_VR_PHYWE ..................................................... 3-56
ADI_PWR_VR_WAKE ........................................................ 3-56
PM Module Macros .................................................................... 3-56
EXTERNAL BUS INTERFACE UNIT MODULE
Introduction ................................................................................. 4-2
Using the EBIU Module ............................................................... 4-3
EBIU API Reference ................................................................... 4-10
Notation Conventions ........................................................... 4-10
adi_ebiu_AdjustSDRAM ....................................................... 4-11
adi_ebiu_Control .................................................................. 4-12
adi_ebiu_GetConfigSize ........................................................ 4-15

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Contents
adi_ebiu_Init ........................................................................ 4-16
adi_ebiu_LoadConfig ............................................................ 4-22
adi_ebiu_SaveConfig ............................................................. 4-23
Public Data Types and Enumerations ........................................... 4-24
ADI_EBIU_RESULT ............................................................ 4-24
ADI_EBIU_SDRAM_BANK_VALUE ................................... 4-27
ADI_EBIU_TIME ................................................................ 4-27
ADI_EBIU_TIMING_VALUE ............................................. 4-28
ADI_EBIU_ASYNCH_BANK_TIMING .............................. 4-29
ADI_EBIU_ASYNCH_BANK_VALUE ................................. 4-30
Setting Control Values in the EBIU Module ................................ 4-31
ADI_EBIU_COMMAND ..................................................... 4-31
ADI_EBIU_COMMAND_PAIR ........................................... 4-38
Command Value Enumerations ............................................. 4-38
ADI_EBIU_SDRAM_ENABLE ........................................ 4-38
ADI_EBIU_SDRAM_BANK_SIZE .................................. 4-39
ADI_EBIU_SDRAM_BANK_COL_WIDTH ................... 4-39
ADI_EBIU_SDRAM_MODULE_TYPE .......................... 4-39
ADI_EBIU_CMD_SET_SDRAM_SCTLE ....................... 4-40
ADI_EBIU_SDRAM_EMREN ......................................... 4-40
ADI_EBIU_SDRAM_PASR ............................................. 4-41
ADI_EBIU_SDRAM_TCSR ............................................. 4-41
ADI_EBIU_SDRAM_SRFS .............................................. 4-41
ADI_EBIU_SDRAM_EBUFE .......................................... 4-42

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ADI_EBIU_SDRAM_PUPSD .......................................... 4-42
ADI_EBIU_SDRAM_PSM .............................................. 4-43
ADI_EBIU_SDRAM_FBBRW ......................................... 4-43
ADI_EBIU_SDRAM_CDDBG ........................................ 4-44
ADI_EBIU_BANK_NUMBER ........................................ 4-44
ADI_EBIU_ASYNCH_BANK_ENABLE ......................... 4-45
ADI_EBIU_ASYNCH_CLKOUT .................................... 4-45
ADI_EBIU_ASYNCH_BANK_DATA_PATH .................. 4-45
ADI_EBIU_ASYNCH_BANK_ARDY_ENABLE ............. 4-46
ADI_EBIU_ASYNCH_BANK_ARDY_POLARITY ......... 4-46
ADI_EBIU_ASYNCH_HOLD_TIME ............................. 4-46
ADI_EBIU_ASYNCH_SETUP_TIME ............................. 4-47
ADI_EBIU_ASYNCH_TRANSITION_TIME ................. 4-47
DEFERRED CALLBACK MANAGER
Introduction ................................................................................. 5-1
Using the Deferred Callback Manager ........................................... 5-3
Interoperability With an RTOS ..................................................... 5-8
adi_dcb_Forward .................................................................... 5-9
adi_dcb_RegisterISR ............................................................. 5-11
Handling Critical Regions Within Callbacks .......................... 5-11
DCB Manager API Reference ...................................................... 5-12
Notation Conventions ........................................................... 5-12
adi_dcb_Close ...................................................................... 5-13
adi_dcb_Control ................................................................... 5-14

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Contents
adi_dcb_Init ......................................................................... 5-17
adi_dcb_Open ...................................................................... 5-19
adi_dcb_Post ......................................................................... 5-21
adi_dcb_Remove ................................................................... 5-23
adi_dcb_Terminate ................................................................ 5-24
Public Data Types and Macros ..................................................... 5-25
ADI_DCB_CALLBACK_FN ................................................ 5-25
ADI_DCB_COMMAND_PAIR ........................................... 5-25
ADI_DCB_COMMAND ...................................................... 5-26
ADI_DCB_ENTRY_HDR .................................................... 5-26
ADI_DCB_RESULT ............................................................. 5-27
DMA MANAGER
Introduction ................................................................................. 6-2
Theory of Operation ..................................................................... 6-3
Overview ................................................................................ 6-3
DMA Manager Initialization ................................................... 6-4
DMA Manager Termination ................................................... 6-5
Memory DMA and Peripheral DMA ........................................ 6-6
Controlling Memory Streams ................................................... 6-7
Opening Memory Streams ................................................... 6-7
Memory Transfers ............................................................... 6-8
One-Dimensional Transfers (Linear Transfers) ................. 6-8
Two-Dimensional Transfers ............................................. 6-9
Closing Memory Streams .................................................. 6-10

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Controlling DMA Channels .................................................. 6-10
Opening DMA Channels .................................................. 6-11
Single Transfers ............................................................ 6-12
Circular Transfers ......................................................... 6-14
Large Descriptor Chaining Model ................................. 6-16
Small Descriptor Chaining Model ................................. 6-20
Arrays of Descriptors .................................................... 6-20
Configuring a DMA Channel ........................................... 6-20
Closing a DMA Channel .................................................. 6-21
Transfer Completions ............................................................ 6-21
Polling ............................................................................. 6-22
Callbacks .......................................................................... 6-22
Memory Stream Callbacks ............................................ 6-22
Circular Transfer Callbacks ........................................... 6-23
Descriptor Callbacks ..................................................... 6-23
Descriptor-Based Sub-Modes ................................................. 6-24
Loopback Sub-Mode ......................................................... 6-24
Streaming Sub-Mode ........................................................ 6-25
DMA Channel to Peripheral Mapping ................................... 6-26
Sensing a Mapping ........................................................... 6-27
Setting a Mapping ............................................................ 6-27

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Contents
Interrupts .............................................................................. 6-27
Hooking Interrupts ........................................................... 6-28
Unhooking Interrupts ....................................................... 6-28
Two-Dimensional DMA ........................................................ 6-29
DMA Traffic Control ........................................................... 6-31
DMA Manager API Reference ..................................................... 6-32
Notation Conventions ........................................................... 6-32
adi_dma_Buffer ..................................................................... 6-34
adi_dma_Close ...................................................................... 6-36
adi_dma_Control .................................................................. 6-37
adi_dma_GetMapping ........................................................... 6-39
adi_dma_Init ........................................................................ 6-40
adi_dma_MemoryClose ......................................................... 6-41
adi_dma_MemoryCopy ......................................................... 6-42
adi_dma_MemoryCopy2D .................................................... 6-44
adi_dma_MemoryOpen ......................................................... 6-46
adi_dma_Open ..................................................................... 6-48
adi_dma_Queue .................................................................... 6-50
adi_dma_SetMapping ............................................................ 6-51
adi_dma_Terminate ............................................................... 6-52

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Public Data Structures, Enumerations, and Macros ...................... 6-53
Data Types ............................................................................ 6-54
ADI_DMA_CHANNEL_HANDLE ................................. 6-54
ADI_DMA_DESCRIPTOR_UNION and ADI_DMA_
DESCRIPTOR_HANDLE ............................................ 6-54
ADI_DMA_STREAM_HANDLE .................................... 6-55
Data Structures ..................................................................... 6-55
ADI_DMA_2D_TRANSFER ........................................... 6-55
ADI_DMA_CONFIG_REG ............................................ 6-56
ADI_DMA_DESCRIPTOR_ARRAY ................................ 6-56
ADI_DMA_DESCRIPTOR_LARGE ............................... 6-56
ADI_DMA_DESCRIPTOR_SMALL ............................... 6-57
ADI_DMA_TC_SET ....................................................... 6-57
ADI_DMA_TC_GET ...................................................... 6-58
General Enumerations ........................................................... 6-58
ADI_DMA_CHANNEL_ID ............................................ 6-58
ADI_DMA_EVENT ........................................................ 6-58
ADI_DMA_MODE ......................................................... 6-59
ADI_DMA_PMAP ........................................................... 6-60
ADI_DMA_RESULT ....................................................... 6-60
ADI_DMA_STREAM_ID ............................................... 6-60
ADI_DMA_TC_PARAMETER ........................................ 6-61
ADI_DMA_CONFIG_REG Field Values .............................. 6-61
ADI_DMA_DMA2D ....................................................... 6-61
ADI_DMA_DI_EN ......................................................... 6-61

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Contents
ADI_DMA_DI_SEL ......................................................... 6-61
ADI_DMA_EN ................................................................ 6-62
ADI_DMA_WDSIZE ....................................................... 6-62
ADI_DMA_WNR ............................................................ 6-62
DMA Commands .................................................................. 6-62
PROGRAMMABLE FLAG SERVICE
Introduction ................................................................................. 7-2
Operation ..................................................................................... 7-3
Initialization ............................................................................ 7-3
Termination ............................................................................ 7-4
Flag IDs .................................................................................. 7-4
Flag Control Functions ............................................................ 7-5
adi_flag_Open .................................................................... 7-5
adi_flag_Close .................................................................... 7-5
adi_flag_SetDirection .......................................................... 7-5
adi_flag_Set ........................................................................ 7-5
adi_flag_Clear ..................................................................... 7-6
adi_flag_Toggle ................................................................... 7-6
adi_flag_Sense .................................................................... 7-6
Callbacks ................................................................................ 7-6
adi_flag_InstallCallback ...................................................... 7-7
adi_flag_RemoveCallback ................................................... 7-8
adi_flag_SuspendCallbacks .................................................. 7-9

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adi_flag_ResumeCallbacks .................................................. 7-9
adi_flag_SetTrigger ............................................................. 7-9
Coding Example ..................................................................... 7-9
Initialization ..................................................................... 7-10
Opening a Flag ................................................................. 7-11
Setting Flag Direction ....................................................... 7-11
Controlling an Output Flag .............................................. 7-11
Sensing the Value of a Flag ................................................ 7-12
Installing a Callback Function ........................................... 7-12
Suspending and Resuming Callbacks ................................. 7-13
Removing Callbacks ......................................................... 7-13
Termination ..................................................................... 7-14
Flag Service API Reference .......................................................... 7-15
Notation Conventions ........................................................... 7-15
adi_flag_Clear ....................................................................... 7-16
adi_flag_Close ...................................................................... 7-17
adi_flag_Init ......................................................................... 7-18
adi_flag_Open ...................................................................... 7-20
adi_flag_SetDirection ............................................................ 7-21
adi_flag_Terminate ............................................................... 7-22
adi_flag_Set .......................................................................... 7-23
adi_flag_Toggle ..................................................................... 7-24
adi_flag_Sense ...................................................................... 7-25
adi_flag_InstallCallback ........................................................ 7-26

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Contents
adi_flag_RemoveCallback ...................................................... 7-28
adi_flag_SuspendCallbacks .................................................... 7-29
adi_flag_ResumeCallbacks ..................................................... 7-30
adi_flag_SetTrigger ................................................................ 7-31
Public Data Types, Enumerations, and Macros ............................. 7-32
ADI_FLAG_ID ..................................................................... 7-32
Associated Macros ............................................................. 7-33
ADI_FLAG_RESULT ........................................................... 7-33
ADI_FLAG_EVENT ............................................................ 7-34
ADI_FLAG_TRIGGER ........................................................ 7-35
ADI_FLAG_DIRECTION ................................................... 7-35
TIMER SERVICE
Introduction ................................................................................. 8-2
Operation ..................................................................................... 8-3
Initialization ............................................................................ 8-3
Termination ............................................................................ 8-3
Timer IDs ............................................................................... 8-4
Basic Timer Functions ............................................................. 8-4
adi_tmr_Open .................................................................... 8-4
adi_tmr_Close .................................................................... 8-4
adi_tmr_Reset ..................................................................... 8-5
General-Purpose Timer Functions ............................................ 8-5
adi_tmr_GPControl ............................................................ 8-5
adi_tmr_GPGroupEnable ................................................... 8-5

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Core Timer Functions ............................................................. 8-6
adi_tmr_CoreControl ......................................................... 8-6
Watchdog Timer Functions ..................................................... 8-6
adi_tmr_WatchdogControl ................................................. 8-6
Peripheral Timer Functions ..................................................... 8-7
adi_tmr_GetPeripheralID ................................................... 8-7
Callbacks ................................................................................ 8-7
adi_tmr_InstallCallback ...................................................... 8-8
adi_tmr_RemoveCallback ................................................... 8-9
Coding Example ..................................................................... 8-9
Initialization ..................................................................... 8-10
Opening a Timer .............................................................. 8-10
Configuring a Timer ......................................................... 8-10
Enabling and Disabling Timers ......................................... 8-12
Installing a Callback Function ........................................... 8-13
Removing Callbacks ......................................................... 8-14
Termination ..................................................................... 8-15
Timer Service API Reference ....................................................... 8-15
Notation Conventions ........................................................... 8-15
adi_tmr_Init ......................................................................... 8-16
adi_tmr_Open ...................................................................... 8-17
adi_tmr_Terminate ............................................................... 8-18
adi_tmr_Close ...................................................................... 8-19
adi_tmr_Reset ....................................................................... 8-20

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Contents
adi_tmr_CoreControl ............................................................ 8-21
adi_tmr_WatchdogControl .................................................... 8-22
adi_tmr_GPControl .............................................................. 8-23
adi_tmr_GPGroupEnable ...................................................... 8-24
adi_tmr_InstallCallback ......................................................... 8-26
adi_tmr_RemoveCallback ...................................................... 8-28
adi_tmr_GetPeripheralID ...................................................... 8-29
Public Data Types, Enumerations, and Macros ............................. 8-30
Timer IDs ............................................................................. 8-30
Associated Macros ............................................................. 8-31
ADI_TMR_RESULT ............................................................ 8-32
ADI_TMR_EVENT ............................................................. 8-33
ADI_TMR_CORE_CMD ..................................................... 8-33
ADI_TMR_WDOG_CMD .................................................. 8-34
ADI_TMR_GP_CMD .......................................................... 8-35
PORT CONTROL SERVICE
Introduction ................................................................................. 9-2
Using the Port Control Manager .................................................... 9-3
Port Control Manager API Reference ............................................. 9-5
Notation Conventions ............................................................. 9-5
adi_ports_Init ......................................................................... 9-6
adi_ports_Terminate ................................................................ 9-7
adi_ports_EnablePPI ............................................................... 9-8
adi_ports_EnableSPI ............................................................... 9-9

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adi_ports_EnableSPORT ...................................................... 9-10
adi_ports_EnableUART ........................................................ 9-11
adi_ports_EnableCAN .......................................................... 9-12
adi_ports_EnableTimer ......................................................... 9-13
adi_ports_EnableGPIO ......................................................... 9-15
Public Data Types, Enumerations, and Macros ............................ 9-16
ADI_PORTS_RESULT ........................................................ 9-16
Directive Enumeration Values ............................................... 9-17
DEVICE DRIVER MANAGER
Device Driver Model Overview ................................................... 10-3
Using the Device Manager .......................................................... 10-6
Device Manager Overview ..................................................... 10-6
Theory of Operation ............................................................. 10-7
Data ................................................................................. 10-7
Initializing the Device Manager ........................................ 10-8
Device Manager Termination ............................................ 10-9
Opening a Device ........................................................... 10-10
Configuring a Device ...................................................... 10-11
Dataflow Method ....................................................... 10-12
Enabling Dataflow ...................................................... 10-15
Providing Buffers to a Device .......................................... 10-15
Closing a Device ............................................................. 10-16
Callbacks ........................................................................ 10-16