Fast, simple microcomputer-controlled data acquisition system

Journal Article · Tue Jun 01 04:00:00 EDT 1982 · IEEE Trans. Instrum. Meas.; (United States)

DOI:https://doi.org/10.1109/TIM.1982.6312539· OSTI ID:5000907

Wallingford, E E

A simple data acquisition scheme has been designed for the TI9900 microcomputer which will simultaneously acquire and store the output of two independent 8-bit, analog-to-digital converters (ADCs) during a single programmed move instruction cycle. The ADC is read during the indirectly addressed read part of the move cycle and the start conversion is initiated during the indexed indirectly addressed write part of the move cycle. For a TI9900 with a 3-mhz clock this provides data acquisition at a 115-khz rate. The high-speed data acquisition is made possible by configuring the interface to respond to two separate nonconflicting parallel processes. Triggering for the two parallel processes occurs sequentially and is derived from the seven memory accesses of the mov instruction; a read a-to-d signal and a start conversion signal. The hardware/software interfacing requirements and assembler instructions used to control the acquisition are described. 2 references.

• Research Organization: Royal Military College, Kingston, Ontario, Canada
• OSTI ID: 5000907
• Journal Information: IEEE Trans. Instrum. Meas.; (United States), Journal Name: IEEE Trans. Instrum. Meas.; (United States) Vol. 2; ISSN IEIMA
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990200* -- Mathematics & Computers
ANALOG-TO-DIGITAL CONVERTERS
COMPUTERS
DATA ACQUISITION SYSTEMS
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
MICROELECTRONIC CIRCUITS
MICROPROCESSORS
PARALLEL PROCESSING
PROGRAMMING