Host selectively determines whether a task should be performed b

Details Host selectively determines whether a task should be performed b Host selectively determines whether a task should be performed b

1992-07-14

1996-01-23

Lee, Thomas C.

Boots, shoes, and leggings

395650, 3642423, 36424231, 364260, 364DIG1, 3642645, 3642706, G06F 1312, G06F 1314

Patent

active

054871549

ABSTRACT:
A low-cost digital signal processing system is provided which can prevent data loss during data transfer and can eliminate processing overhead regardless of the length of the I/O period of an external I/O processing device. When the data I/O period of the external I/O device such as an A/D converter is shorter than the period of data processing by the DSP, the data reception and transmission are performed through a DMA controller between the external I/O devices and the memory to reduce the burden on the DSP. On the other hand, when the data input and output period is longer than the DSP processing time, the data reception and transmission is directly carried out by the external I/O device and the DSP without use of the DMA controller. In addition, in the execution of a DSP program which comprises at least one process, a function of each process is provided to have input and output parameters identifying the addresses of data reception or transmission units which are assigned to the input and output parameters to simplify the DSP programming.

REFERENCES:
patent: 4262331 (1981-04-01), Freeland et al.
patent: 4392196 (1983-07-01), Glenn et al.
patent: 4517641 (1985-05-01), Pinheiro
patent: 4658351 (1987-04-01), Teng
patent: 4954945 (1990-09-01), Inoue
patent: 5045993 (1991-09-01), Murakami et al.
patent: 5291614 (1994-03-01), Baker et al.
Jun Kurita, et al., "An Advanced Test System Architecture for Synchronous and Asynchronous Control of Mixed Signal Device Testing", 1990 International Test Conference, 1990 IEEE, pp. 508-513.
Koji Karube, et al., "Advanced Mixed Signal Testing by DSP Localized Tester," 1991 International Test Conference, 1991 IEEE, pp. 1055-1060.
Technical Summary "96-Bit General-Purpose Floating-Point Digital-Signal Processor (DSP)," Motorola Inc., 1988.

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