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Sun Microsystems S16A s16agetoutputbits, s16aopen, Description, Syntax, Arguments, s16ap, Return

Models: S16A

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Input and Output

S16A User’s Guide

s16a_get_output_bits

Description

Get the output resolution of the S16A. Returns 16 or 20, reflecting the current driver setting for the output channel.

Syntax

int s16a_get_output_bits(S16aDev *s16a_p);

Arguments

s16a_p

S16A device handle returned from s16a_open

Return

Returns 16 or 20 on success; returns –1 if the ioctl driver call fails, and sets errno to indicate the problem.

s16a_open

Description

Opens the specified S16A and sets up the device handle.

Syntax

S16aDev *s16a_open(int unit, int channel, int output);

Arguments
unit	specifies the device unit number
channel	specifies the analog I/O channel number: 0 or 1
output	specifies the direction: 1 means the output subdevice; 0 means the input subdevice

Return

A handle of type (S16aDev *), or NULL if error. If an error occurs, check the errno global variable for the error number.

14	EDT, Inc. October, 1996

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Sun Microsystems S16A manual s16agetoutputbits, s16aopen, Description, Syntax, Arguments, s16ap, Return, unit, channel

Contents

S16A USER’S GUIDES16A User’s Guide Contents Tables Specifications OverviewInstallation Input and OutputInstalling the Software InstallationInstalling the Hardware Using SunOS Version4. Place the diskette that came with the S16A into the diskette drive make unload Using System V Release 4 Solaris 2.4 or LaterBuilding the Sample Programs volcheck pkgadd -d /floppy/floppy0 EDTs16aIncluded Files Input and Output Elements of S16A ApplicationsDescription DMA Library RoutinesRoutine Table 1. General DMA Library RoutinesDescription s16abufferaddressesRoutine Table 2. S16A-specific Library Routiness16achecknextbuffer s16acancels16acancelcurrent DescriptionSyntax s16acloseDescription int s16acloseS16aDev *s16apSyntax s16aconfigureringbuffersDescription ArgumentsDescription s16adones16agetdaccontrolreg SyntaxDescription s16agetdiodataregs16agetdiodirectionreg SyntaxDescription s16agetoutputbitss16aopen SyntaxDescription s16areads16aserialread SyntaxNull-terminated command string to send to the Analog Input Module s16aserialstrs16aserialwrite Number of characters in the command stringDescription s16asetdefaultss16asetdaccontrolreg SyntaxDescription s16asetdiodataregs16asetdiodirectionreg SyntaxDescription s16asetoutputbitss16astartbuffers SyntaxDescription s16astopbufferss16awaitforbuffer SyntaxDescription s16awaitfornextbuffers16awrite SyntaxError Code Error Conditionsfoiparityerror Error ConditionHardware Interface Electrical InterfaceTable 4. S16A Interface Signals Interface SignalsSignal S16A I/OSignal Connector PinoutThe S16A uses a 37-pin D connector, such as an AMP SignalRegisters SBus Addresses Figure 1. S16A SBus AddressesNext DMA Address Registers DMA RegistersCurrent DMA Address Registers DMA ChannelDescription Current Count RegistersControl and Next Count Registers Table 8. Next DMA Address RegistersDIO Direction Register Direct I/O RegistersDAC Output Control Register DIO Data RegisterDescription Analog Input Module Internal RegistersS16A Table 11. DAC Output Control RegisterValue hex Input Configuration RegistersInput Clock Prescale Registers DescriptionTable 14. Input Gain High Byte Values Trim RegistersDescription Trim RegisterAnalog Input Module Control Protocol Analog Input Module UART RegistersTemperature Register Trim Input Gain RegistersRead a 16-bit value from a Input Configuration register Write to an Input Configuration RegisterRead from an Input Configuration Register Number of the Input Configuration register to be written. 2 is inputWrite to a Trim Register UART Command/Status RegisterTable 16. UART Command/Status Register DnmmXilinx Programming Registers UART Data RegisterSBus Compliance SpecificationsPower SoftwareReferences Contacting EDT cd /pub/s16a/4xget README Index

s16a_get_output_bits

s16a_open

unit

specifies the device unit number

channel

specifies the analog I/O channel number: 0 or 1

output