Method of displaying multi-channel waveforms
First Claim
1. A method of displaying multi-channel waveforms for embedded systems, comprising the steps of:
- a. assigning a plurality of separate spaces in a video memory, each of which is mapped to a same display terminal, wherein at least one of the spaces is named as a waveform screen which is used for storing waveform data; and
dividing writing operations for a video memory by CPU, wherein the writing operations for a video memory divided by CPU contains at least a writing operation for the waveform screen;
b. transmitting data including the waveform screen data which is read out from the video memory to corresponding ones of processing channels to be processed respectively by a display drive circuit, wherein the channels contains channels for waveform screen data which are named as waveform channels; and
c. synthesizing multi-channel data processed in and output from the corresponding channels, and transmitting the synthesized data to the display terminal.
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Accused Products
Abstract
A method of displaying multi-channel waveforms, which is used for displaying multi-channel waveforms dynamically in embedded systems, the method comprising the steps of: dividing at least one waveform screen in a video memory which is mapped to a display terminal into a plurality of waveform windows, wherein boundaries of each of the windows are defined by a plurality of values set in at least a set of boundary registers; establishing a waveform parameter table in a memory of the system, which contains characteristic parameters of each waveform in each of the waveform windows; writing waveform data into a logical space in the waveform screen corresponding to a waveform by writing operations from CPU to the video memory; and on a basis of the parameters of the waveform windows in the waveform parameter table, performing a display mode defined by the parameter by means of is changing the mapping relationship between the video memory and the display terminal, before transmitting the data of each of the waveform windows read out from the video memory to the display terminal by a display drive circuit. According to the method of present invention, the inconsistency between the increase of waveforms and the resultant significant increase of logic resources and degradation of the performance of chips for display can be solved, which enables the system advantageous in high efficiency, low cost and excellent extensibility.
45 Citations
16 Claims
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1. A method of displaying multi-channel waveforms for embedded systems, comprising the steps of:
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a. assigning a plurality of separate spaces in a video memory, each of which is mapped to a same display terminal, wherein at least one of the spaces is named as a waveform screen which is used for storing waveform data; and
dividing writing operations for a video memory by CPU, wherein the writing operations for a video memory divided by CPU contains at least a writing operation for the waveform screen;
b. transmitting data including the waveform screen data which is read out from the video memory to corresponding ones of processing channels to be processed respectively by a display drive circuit, wherein the channels contains channels for waveform screen data which are named as waveform channels; and
c. synthesizing multi-channel data processed in and output from the corresponding channels, and transmitting the synthesized data to the display terminal. - View Dependent Claims (2, 3, 4, 5)
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6. A method of displaying multi-channel waveforms, which is used for displaying multi-channel waveforms simultaneously in embedded systems, the method comprising the steps of:
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a. dividing a waveform screen in a video memory that is mapped to a display terminal into a plurality of waveform windows arranged in a vertical direction, each of which displays a waveform or displays multi-channel waveforms in parallel in a horizontal direction respectively, wherein boundaries of each of the windows are defined by a plurality of values set in at least a set of boundary registers;
b. establishing a waveform parameter table in a memory of the system, which contains characteristic parameters of each waveform in each of the waveform windows, wherein the characteristic parameters contain at least a parameter indicating a display mode of the waveform;
c. writing waveform data into a logical space in the waveform screen corresponding to the waveform by writing operations from CPU to the is video memory; and
d. on a basis of the parameters of the waveform windows in the waveform parameter table, performing a display mode defined by the parameter by means of changing the mapping relationship between the video memory and the display terminal, before transmitting the data of each of the waveform windows read out from the video memory to the display terminal by a display drive circuit. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification