The traditional non-contact measurement system by linear CCD is unable to satisfy modern demands on speed and precision.A new measurement method is introduced,which the DSP works as signal processor,the CPLD works as timing generator,with high-speed ADC and FIFO.The cottrol part that the CPLD works with DSP to carry the efficient and flexible data acquisition is introduced in detail.The experiments show the system is efficiently and stability.

Traditional data acquisition system always uses a full flag or half-full flag of FIFO as interrupt request signal sign.This paper introduces the new interface design,which the CPLD works as the logic control core,and uses its interruption module to offer the request signal.Solve the issues that the data being storage not matching with the capability of FIFO.This design not only improves the speed of data acquisition effectively,but also has many advantages,such as with a simple interface circuit,universality,easy to transplant,and other features that can be extensively used in communications and image acquisition.

The traditional cigarette circumference gauge has been unable to satisfy modern demands on speed and precision.A new measurement method is introduced,in which the DSP works as signal processor and the CPLD works as timing generator with high-speed ADC and FIFO.The CPLD works with DSP to carry the efficient and flexible data acquisition.