Sensoray 2410 API Instrukcja Użytkownika Pobierz pdf (Strona 33)

Sensoray 24xx Programming Guide

Model 2426 Multi-Function I/O Module

7.3.2 s2426_ReadAout()

Function: Read the programmed analog output level.

Prototype:

BOOL s2426_ReadAout( SESSION sess, u32 *err, s16 *setpoint );

Returns: True if the operation was successful, otherwise False is returned and

err

will contain the associated error code.

Example:

// Read and display the programmed analog output level.

u32 err = ERR_NONE;

s16 setpoint;

if ( !s2426_ReadAout( sess, &err, &setpoint ) )

printf( "Error: %s\n", s24xx_ErrorText(err) );

else

printf( "Aout: %f Volts\n", (double)setpoint / 3276.8 );

7.3.3 s2426_ReadAdc()

Function: Read all eight digital input channels.

Prototype:

BOOL s2426_ReadAdc( SESSION sess, u32 *err, S2426_ADC_SAMPLE *samples, BOOL timestamps );

Returns: True if the operation was successful, otherwise False is returned and

err

will contain the associated error code.

Notes: This function returns sample data from the module’s eight analog input channels.

Example:

// Read and display the six external analog input channels.

int i;

u32 err = ERR_NONE;

S2426_ADC_SAMPLE samp[8]; // allocate space for 8 chans

if ( !s2426_ReadAdc( sess, &err, &samp, TRUE ) )

printf( "Error: %s\n", s24xx_ErrorText(err) );

else {

for ( i = 0; i < 6; i++ )

printf( "chan %d: %f at t=%d\n", i, samp[i].volts, samp[i].timestamp );

}

Argument Description

sess

Session handle obtained from

s24xx_SessionOpen()

err

Pointer to error code. See Section 4.3.1 for details.

setpoint

Pointer to buffer that will receive the current analog output level.

Argument Description

sess

Session handle obtained from

s24xx_SessionOpen()

err

Pointer to error code. See Section 4.3.1 for details.

samples

Pointer to an array of eight

S2426_ADC_SAMPLE

structures. These will be filled with

digitized sample data and, if desired, timestamps for those samples. Channels 0 through 5

measure external signals, while channels 6 and 7 measure on-board reference standards.

timestamps

Set to True to receive timestamps with digitized sample data.

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