Supported Use Case Examples | Texas Instruments TMS320DM357 instruction

Introduction

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1.5Supported Use Case Examples

The USB supports the following user cases:

Detailed information about the architecture and operation of the USB controller follows in Section 2. Programming examples are also provided for each of the operational modes of the controller.

User Case 1: An example of how to initialize the USB controller

Example 1. Initializing the USB Controller

//Routine to initialize USB controller void usb_init()

{

//local loop variable

int I;

//VBUS must be controlled externally. The following routine

//should perform whatever actions are required (if any) to

//turn off VBUS in the system.

vbus_off();

//Reset the USB controller usbRegs->CTRLR = 0x00000001;

//Power on PHY and oscillator by clearing bits 2, 1, and 0 of USBPHY_CTL sysRegs->USB_PHY_CTRL = 0x000000D0;

//Clear all pending interrupts usbRegs->INTCLRR = usbRegs->INTSRCR;

// Initialize CPPI		DMA
usbRegs->RCPPICR	=	0;	//Disable	the RX DMA
usbRegs->TCPPICR	=	0;	//Disable	the TX DMA

//Initialize CPPI DMA state for(I = 0; i<4; I++) {

usbRegs->CHANNEL[i].TCPPIDMASTATEW0 = 0; usbRegs->CHANNEL[i].TCPPIDMASTATEW1 = 0; usbRegs->CHANNEL[i].TCPPIDMASTATEW2 = 0; usbRegs->CHANNEL[i].TCPPIDMASTATEW3 = 0; usbRegs->CHANNEL[i].TCPPIDMASTATEW4 = 0; usbRegs->CHANNEL[i].TCPPIDMASTATEW5 = 0; usbRegs->CHANNEL[i].RCPPIDMASTATEW0 = 0; usbRegs->CHANNEL[i].RCPPIDMASTATEW1 = 0; usbRegs->CHANNEL[i].RCPPIDMASTATEW2 = 0; usbRegs->CHANNEL[i].RCPPIDMASTATEW3 = 0; usbRegs->CHANNEL[i].RCPPIDMASTATEW4 = 0; usbRegs->CHANNEL[i].RCPPIDMASTATEW5 = 0; usbRegs->CHANNEL[i].RCPPIDMASTATEW6 = 0;

}

}

16

Universal Serial Bus (USB) Controller

SPRUGH3–November 2008

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Texas Instruments TMS320DM357 manual Supported Use Case Examples, Example 1. Initializing the USB Controller

Contents

Users Guide Submit Documentation Feedback Contents 100 Type Register Host mode only HOSTTYPE0 Appendix a List of Figures Receive Cppi DMA State Word 1 RCPPIDMASTATEW1 List of Tables Function Address Register Faddr Field Descriptions Document Revision History Read This First Related Documentation From Texas Instruments Notational Conventions Notational Conventions Features Not Supported FeaturesPurpose of the Peripheral Functional Block Diagram Cppi Supported Use Case Examples Example 1. Initializing the USB Controller Example 2. Programming the USB Endpoints in Peripheral Mode Example 3. Programming the USB Endpoints in Host Mode Else Example 4. Programming the USB DMA Controller While usbRegs-PERITXCSR Industry Standards Compliance Statement Signal Descriptions USB PinsClock Control Indexed and Non-Indexed Registers USB PHY Initialization Dynamic Fifo Sizing Interrupt Service Routine Flow Chart USB Controller Peripheral Mode Operation Peripheral Mode Control Transactions Zero Data Requests Write Requests Read Requests CPU Actions at Transfer Phases Endpoint 0 States Sequence of Transfer OUT Endpoint 0 Service Routine Service Endpoint 0 Flow Chart = Idle Idle Mode Idle Mode Flow Chart TX Mode TX Mode Flow Chart RX Mode RX Mode Flow Chart Error Handling Additional Conditions Peripheral Mode Bulk In Transactions SetupBit Position Bit Field Name Configuration Bulk Transactions Peripheral Mode Bulk OUT Transactions Operation Disnyet Interrupt Transactions Isochronous Transactions Isochronous in Transactions Isochronous OUT Transactions Set to 1 to enable isochronous protocol USB Controller Host Mode Operation Host Mode Control Transactions Setup Phase Setup Phase of a Control Transaction Flow Chart Data Phase Rxpktrdy Data Phase Flow Chart OUT Data Phase OUT Data Phase Flow Chart Status Phase following Setup Phase or OUT Data Phase Completion of Setup or OUT Data Phase Flow Chart OUT Status Phase following in Data Phase Completion of in Data Phase Flow Chart Host Mode Bulk in Transactions Bulk OUT Transactions Host Mode Interrupt Transactions Host Mode Isochronous in Transactions Host Mode Isochronous Out Transactions DMA Operation DMA Transmit OperationTransmit Buffer Cppi Transmit Buffer Descriptor Transmit Buffer Descriptor Word Bits Name DescriptionBits Name Description 310 Buffer Pointer Descriptor. The software sets the Buffer Pointer Transmit DMA State EOQ Transmit Queue Operation Transparent Mode and Rndis Mode Transmit DMA Operation Rndis Mode Setup Transparent Mode SetupDMA Channel TearDown DMA Receive Operation Cppi Receive Buffer Descriptor Receive Buffer Descriptor Word Receive DMA State Bit Field Rx Queue Flow Chart Receive Queue USB Controller Host and Peripheral Modes Operation Rndis Mode and Transparent Mode Receive DMA Operation Receive Abort Handling DMA Teardown Procedure Interrupt HandlingInterrupts Generated by the USB Controller USB Interrupt Conditions USB Interrupt Conditions USB Core Interrupts Test ModesDMA Interrupts Testj TESTSE0NAKTestk Testpacket Forcehost Reset Considerations Power ManagementInterrupt Support Edma Event Support Acronym Register Description Universal Serial Bus USB RegistersTransmit/Receive Cppi Channel 0 State Block Offset Acronym Register Description Common USB Registers FIFOn Target Endpoint 1 Control Registers, Valid Only in Host Mode Target Endpoint 4 Control Registers, Valid Only in Host Mode Control and Status Register for Endpoint 51Dh Control Register Ctrlr Field Descriptions Control Register CtrlrBit Field Value Description Status Register Statr Rndis Register RndisrStatus Register Statr Field Descriptions Rndis Register Rndisr Field Descriptions Auto Request Register Autoreq Auto Request Register Autoreq Field Descriptions USB Interrupt Source Register Intsrcr Field Descriptions USB Interrupt Source Register IntsrcrUSB USB Interrupt Source Set Register Intsetr USB Interrupt Source Set Register Intsetr USB Interrupt Source Clear Register Intclrr USB Interrupt Source Clear Register Intclrr USB Interrupt Mask Register Intmskr USB Interrupt Mask Register Intmskr Field Descriptions USB Interrupt Mask Set Register Intmsksetr USB Interrupt Mask Set Register Intmsksetr USB Interrupt Mask Clear Register Intmskclrr USB Interrupt Mask Clear Register Intmskclrr USB Interrupt Source Masked Register Intmaskedr USB Interrupt Source Masked Register Intmaskedr USB End of Interrupt Register Eoir USB Interrupt Vector Register IntvectrUSB End of Interrupt Register Eoir Field Descriptions USB Interrupt Vector Register Intvectr Field Descriptions Transmit Cppi Control Register Tcppicr Transmit Cppi Teardown Register TcppitdrTransmit Cppi Control Register Tcppicr Field Descriptions Transmit Cppi Teardown Register Tcppitdr Field Descriptions Cppi DMA End of Interrupt Register Cppieoir Cppi DMA End of Interrupt Register Cppieoir Transmit Cppi Masked Status Register Tcppimsksr Transmit Cppi Raw Status Register TcppirawsrMasked Comppending Comppending Transmit Cppi Interrupt Enable Clear Register Tcppiienclrr Transmit Cppi Interrupt Enable Set Register TcppiiensetrComppendingintren Rcppienable Receive Cppi Control Register RcppicrReceive Cppi Masked Status Register Rcppimsksr Receive Cppi Control Register Rcppicr Field Descriptions Receive Cppi Interrupt Enable Set Register Rcppiensetr Receive Cppi Raw Status Register Rcppirawsr Receive Cppi Interrupt Enable Clear Register Rcppiienclrr Receive Buffer Count 0 Register RBUFCNT0Receive Buffer Count 0 Register RBUFCNT0 Field Descriptions Bufcnt Receive Buffer Count 1 Register RBUFCNT1 Receive Buffer Count 2 Register RBUFCNT2Receive Buffer Count 1 Register RBUFCNT1 Field Descriptions Receive Buffer Count 2 Register RBUFCNT2 Field Descriptions Receive Buffer Count 3 Register RBUFCNT3 Transmit Cppi DMA State Word 0 TCPPIDMASTATEW0Receive Buffer Count 3 Register RBUFCNT3 Field Descriptions Txqheadptr Transmit Cppi DMA State Word 1 TCPPIDMASTATEW1 Transmit Cppi DMA State Word 2 TCPPIDMASTATEW2Sopdescriptorptr Currdescriptorptr Truncatednoneop Transmit Cppi DMA State Word 3 TCPPIDMASTATEW3 Transmit Cppi DMA State Word 4 TCPPIDMASTATEW4 Transmit Cppi DMA State Word 5 TCPPIDMASTATEW5 Transmit Cppi Completion Pointer Tcppicompptr Receive Cppi DMA State Word 1 RCPPIDMASTATEW1 Receive Cppi DMA State Word 0 RCPPIDMASTATEW0Sopbufferoffset Receive Cppi DMA State Word 1 RCPPIDMASTATEW1 Rxqheadptr Receive Cppi DMA State Word 2 RCPPIDMASTATEW2 Receive Cppi DMA State Word 3 RCPPIDMASTATEW3 108 Receive Cppi DMA State Word 5 RCPPIDMASTATEW5 Receive Cppi DMA State Word 4 RCPPIDMASTATEW4Pktlength Receive Cppi DMA State Word 6 RCPPIDMASTATEW6 Receive Cppi Completion Pointer RcppicompptrSopbufferbytecnt Currbufferbytecnt Power Management Register Power Power Management Register Power Field DescriptionsReadback / Compare Mode Function Address Register Faddr Interrupt Register for Receive Endpoints 1 to 4 Intrrx Field DescriptionsEP4TX EP3TX EP2TX EP1TX EP0 EP4TX Interrupt Enable Register for Intrtx Intrtxe Interrupt Enable Register for Intrrx IntrrxeEP4RX EP3RX EP2RX EP1RX EP4RX Interrupt Enable Register for Intrrx Intrrxe Interrupt Register for Common USB Interrupts Intrusb Vbuserr Sessreq Discon Conn SOF Resetbabble Resume SuspendVbuserr Interrupt Enable Register for Intrusb Intrusbe Interrupt Enable Register for Intrusb Intrusbe Frame Number Register Frame Frame Number Register Frame Field DescriptionsFramenumber Epsel Register to Enable the USB 2.0 Test Modes Testmode ForcehostForcefs Forcehs Maxpayload Servsetupend SetupendFlushfifo Servrxpktrdy Datatogwren Datatog ISO Mode Dmaen Frcdatatog Dmamode Clrdatatog Control Status Register for Host Transmit Endpoint Hosttxcsr 124 ISO Dmaen Disnyet Dmamode Control Status Register for Host Receive Endpoint Hostrxcsr DataerrnaktimeoutDmaen Disnyet Dmamode Datatogwren 127 Count 0 Register COUNT0 Receive Count Register RxcountCount 0 Register COUNT0 Field Descriptions Receive Count Register Rxcount Field Descriptions Type Register Host mode only HOSTTYPE0 Transmit Type Register Host mode only HosttxtypeType Register Host mode only HOSTTYPE0 Field Descriptions Speed NAKLimit0 Register Host mode only HOSTNAKLIMIT0 Transmit Interval Register Host mode only HosttxintervalEP0NAKLIMIT Polintvlnaklimit Receive Interval Register Host mode only Hostrxinterval Receive Type Register Host mode only HostrxtypeSpeed Prot Rendpn Configuration Data Register Configdata Field Descriptions Configuration Data Register ConfigdataMprxe 133 Transmit and Receive Fifo Register for Endpoint 0 FIFO0 Data Transmit and Receive Fifo Register for Endpoint 2 FIFO2 Transmit and Receive Fifo Register for Endpoint 1 FIFO1Data Ffff Ffff Transmit and Receive Fifo Register for Endpoint 3 FIFO3 Transmit and Receive Fifo Register for Endpoint 4 FIFO4 OTG Device Control Register Devctl OTG Device Control Register Devctl Field DescriptionsBdevice Fsdev Lsdev Vbus Hostmode Hostreq Session Bdevice Transmit Endpoint Fifo Size Txfifosz Receive Endpoint Fifo Size RxfifoszTransmit Endpoint Fifo Size Txfifosz Field Descriptions Receive Endpoint Fifo Size Rxfifosz Field Descriptions Transmit Endpoint Fifo Address Txfifoaddr Receive Endpoint Fifo Address RxfifoaddrReceive Endpoint Fifo Address Rxfifoaddr Field Descriptions Addr Transmit Hub Address Txhubaddr Transmit Function Address TxfuncaddrTransmit Hub Port Txhubport Receive Hub Address Rxhubaddr Receive Function Address RxfuncaddrReceive Hub Port Rxhubport 142 Table A-1. 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