Measurement Computing DAQFlex - Manual (Page 22)

DAQFlex Message-based Firmware SpecificationHardware Reference – USB-204, USB-201, USB-204-OEM, and USB-201-OEM
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Component Supported
Property/Command Set/Get Supported Values
MFGCAL{item} Get YEAR as yyyy; 20xx
MONTH as mm; 01 to 12
DAY as dd; 01 to 31
HOUR as HH; 01 to 23
MINUTE as MM; 01 to 59
SECOND as SS; 01 to 59
MFGSER Get Up to 8 hexadecimal digits
RESET/{value} Set DEFAULT, SYSTEM
DIO Get 1 (number of ports)
DIO{port}
Get 8 (number of bits on the port)
DIR Set/Get IN, OUT
LATCH Set/Get 0 to 255
VALUE Set/Get 0 to 255
DIO{port/bit}
DIR Set/Get IN, OUT
LATCH Set/Get
port number: 0
bit number: 0 to 7
port value: 0 to 255
bit value: 0, 1
VALUE Set/Get
port number: 0
bit number: 0 to 7
port value: 0 to 255
bit value: 0, 1
Hardware features
 8 single-ended analog input channels, numbered 0 to 7.
Analog input range is fixed at ±10 V.
 1 digital port (8 bits). Each bit is individually configurable as input or output.
 1 external digital trigger input.
 External pacer input/output. This feature allows multiple devices to acquire synchronized samples.
 1,024 bytes of nonvolatile EEPROM memory; used for storing configuration information, calibration
data, and user data.
 RATE takes a float value. An error is generated if value set is less than the device minimum
sampling rate or greater than the device maximum sampling rate.
 Bulk transfers:
o Bulk transfers from endpoint 1 IN are used for analog input scans.
o The bulk in max packet size is 64 bytes.
o The bulk transfer size must be a multiple of the USB maximum bulk packet size.
o Bulk transactions are complete when a packet is sent that is less than the max packet size.
When sending an integer multiplier of the max packet size of data during a transaction, include
an empty packet to indicate the end of the transaction.