Xilinx ML403 specifications OPB IIC Simulation, Signal Name Functionality

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Simulation

In most cases, after data is transmitted, the test waits for an interrupt from the OPB IIC.

BFM

R

IIC_20

Base Address 0xE0000000

SCL

SDA

IIC_AA

Base Address 0xE1000000

X979_28_012907

Figure 28: OPB IIC Simulation

Internal signal names used in the OPB IIC core are provided in Table 6. Table 6: Internal Signals in OPB IIC

Signal Name	Functionality

Txak	Transmit acknowledge

Gc_en	General call address enbale

Ro_prev	Receive overrun prevent

Dtre	Data transmit register empty

Msms	Master/Slave select

Dtr(7:0)	Data Transmit Register

Adr(7:0)	IIC Slave Address Register

Ten_adr(7:5)	10-bit Slave Address Register

Bb	Bus Busy

Aas	Addressed as slave

Al	Arbitration lost

Srw	Slave read/write

Abgc	Addressed by general call

Data_iic(7:0)	IIC data for microprocessor

New_rcv_data	New data received on IIC bus

Tx_under_prev	Transmit FIFO Empty IRQs

slave_sda	SDA value when slave

master_sda	SDA value when master

sm_stop	Stop condition needs to be generated

rsta_tx_under_prev	Repeated start Tx underﬂow prevent

XAPP979 (v1.0) February 26, 2007

www.xilinx.com

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Contents Included Systems SummaryIIC Primer IntroductionIntroduction Data Transfer on the IIC Bus Reference System Speciﬁcs Reference System SpeciﬁcsOPB IIC Registers ML403 XC4VFX12 Address MapOPB IIC Registers Address OPB IIC Control Register Bits Name DescriptionStatus Register SR Status Register Bit Deﬁnitions Contd Microchip 24LC04 Conﬁguring the OPB IIC Core24LC04 Control Byte Allocation ML40x Schematic for IIC ConnectionsML40x Resistors Expansion Header Fpga IIC Pins TotalPhase Aardvark AdapterAardvark Control Center Software Projects Executing the Reference System from EDKProjects interfacing to Aardvark Adapter Running the Applications Running the ApplicationsProject HyperTerminal Parameters Invoke XPS. Run Hardware → Generate Netlist Using ChipScope with OPB IICRun Start → Programs → ChipScope Pro → ChipScope Inserter Start → Programs → ChipScope Pro → ChipScope Pro Analyzer Making Net Connections in ChipScope InserterSetting Up the Chipscope Trigger Linux Kernel Linux KernelBSP Settings Connected Peripherals Simulation SimulationOPB IIC Simulation Signal Name FunctionalityComplete Simulation Arbitrartion Lost Test Simulation Arbitration Lost Test Code Simulation with iicAA as Master Test code with iicAA as Master X97934012907 Test Code for Simulation with iic20 as Master History RevisionReferences Revision