CN104408212B - A kind of portable data acquisition card collecting method - Google Patents
A kind of portable data acquisition card collecting method Download PDFInfo
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- CN104408212B CN104408212B CN201410704654.2A CN201410704654A CN104408212B CN 104408212 B CN104408212 B CN 104408212B CN 201410704654 A CN201410704654 A CN 201410704654A CN 104408212 B CN104408212 B CN 104408212B
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Abstract
The invention discloses a kind of portable data acquisition card collecting method, it comprises the following steps：S1：Capture card electric power starting, data collecting card starts to carry out AD samplings to analog signal；S2：After DDR2 cachings 1S sampled data, stop sampling；S3：MCU, which is sent, starts data transfer instruction to FPGA；S4：FPGA, which is received, starts data transfer instruction, data is read from DDR2, and write data to SlaveFIFO by GPIF；S5：MCU is detected after data, by DMA write data from GPIF sockets to USB；S6：It is transferred to after the data of USB reading DMA buffering areas outside capture card.This method can complete the display of the time-domain and frequency-domain to transmitting data, and caching is emptied in time, ensure the smooth progress of data transfer.
Description
Technical field
The present invention relates to a kind of collecting method, particularly a kind of portable data acquisition card collecting method.
Background technology
Data acquisition refers to the automatic data collection electricity from the analog- and digital- unit under test such as sensor and other Devices to tests
Or electric quantity signal, it is sent in host computer and is analyzed, is handled.Data collecting system is to combine based on computer or other are special
Flexible, user-defined measuring system is realized with the measurement software and hardware product of test platform.Data collecting card, that is, realize
The computer extender card of data acquisition function, can be accessed by buses such as USB, 485,232, Ethernet, various wireless networks
Personal computer.
Data collecting card is used to be acquired various types of data, with the digitlization of modern comfort direction, informationization
High speed development, data acquisition is stuck in every field and is increasingly widely applied.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of portable data acquisition card data acquisition side
Method, this method collection data after capture card is cached in real time, be transferred to by USB interface outside capture card, at the same can and
When empty caching, ensure the smooth progress of data acquisition and transmission.
The purpose of the present invention is achieved through the following technical solutions：A kind of portable data acquisition card data acquisition side
Method, it comprises the following steps：
S1：Capture card electric power starting, data collecting card starts to carry out AD samplings to analog signal；
S2：After DDR2 cachings 1S sampled data, stop sampling；
S3：MCU, which is sent, starts data transfer instruction to FPGA；
S4：FPGA, which is received, starts data transfer instruction, data is read from DDR2, and write data to by GPIF
SlaveFIFO；
S5：MCU is detected after data, by DMA write data from GPIF sockets to USB；
S6：It is transferred to after the data of USB reading DMA buffering areas outside capture card.
It also empties the step of buffer area has transmitted data and notified GPIF including USB sockets.
The beneficial effects of the invention are as follows：The invention provides a kind of portable data acquisition card collecting method, the party
The data of method collection are transferred to outside capture card, while can empty in time slow after capture card is cached in real time by USB interface
Deposit, ensure the smooth progress of data acquisition and transmission.
Brief description of the drawings
Fig. 1 is collecting method block diagram；
Fig. 2 is data collecting card structure chart.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
It is as described below.
As shown in figure 1, a kind of portable data acquisition card collecting method, it comprises the following steps：
S1：Capture card electric power starting, data collecting card starts to carry out AD samplings to analog signal；
S2：After DDR2 cachings 1S sampled data, stop sampling；
S3：MCU, which is sent, starts data transfer instruction to FPGA；
S4：FPGA, which is received, starts data transfer instruction, data is read from DDR2, and write data to by GPIF
SlaveFIFO；
S5：MCU is detected after data, by DMA write data from GPIF sockets to USB；
S6：It is transferred to after the data of USB reading DMA buffering areas outside capture card.
It also empties the step of buffer area has transmitted data and notified GPIF including USB sockets.
Data collecting card includes AD converter, FPGA, Clock management chip, DDR2 and MCU, and described AD converter will be adopted
The data transfer collected is to FPGA, and FPGA is by data buffer storage into DDR2, and after the sampled data for caching 1S, FPGA is according to MCU's
The data of collection are transferred to MCU by instruction, and MCU is transferred data in USB DMA, is transferred data to by USB upper
Machine.The data of the 4 road AD samplings of data collecting card are cached in 4 DDR2 of capture card respectively, after the data for caching 1S, stop adopting
Sample.MCU sends the instruction for starting to transmit data and the data of caching is write into data by GPIF again after receiving instruction to FPGA, FPGA
Detected to SlaveFIFO, MCU after data, by DMA write data from GPIF sockets to USB, USB reading DMA buffering areas
It is transferred to after data outside capture card.
The portable data acquisition card collecting method simple and fast of the present invention, can be to sampling clock by host computer
Configured, interior external clock and configuration sample rate can be selected；According to demand data can be selected to pass into data transfer phase
Defeated passage, while the data of DAM buffering areas can be removed in time.
Claims (1)
1. a kind of portable data acquisition card collecting method, it is characterised in that：It comprises the following steps：
S1：Capture card electric power starting, data collecting card starts to carry out AD samplings to analog signal, wherein, capture card turns including AD
Parallel operation, FPGA, Clock management chip, DDR2 and MCU；
S2：AD converter is by the data transfer collected to FPGA, and FPGA is by data buffer storage into DDR2, and DDR2 caching 1S's adopts
After sample data, stop sampling；
S3：MCU, which is sent, starts data transfer instruction to FPGA；
S4：FPGA, which is received, starts data transfer instruction, data is read from DDR2, and write data to by GPIF
SlaveFIFO；
S5：MCU is detected after data, by DMA write data from GPIF sockets to USB；
S6：It is transferred to after the data of USB reading DMA buffering areas outside capture card；
S7：USB sockets empty buffer area and have transmitted data and notified GPIF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704654.2A CN104408212B (en) | 2014-11-28 | 2014-11-28 | A kind of portable data acquisition card collecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704654.2A CN104408212B (en) | 2014-11-28 | 2014-11-28 | A kind of portable data acquisition card collecting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104408212A CN104408212A (en) | 2015-03-11 |
| CN104408212B true CN104408212B (en) | 2017-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410704654.2A Active CN104408212B (en) | 2014-11-28 | 2014-11-28 | A kind of portable data acquisition card collecting method |
Country Status (1)
| Country | Link |
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| CN (1) | CN104408212B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201188664Y (en) * | 2008-01-22 | 2009-01-28 | 太原理工天成电子信息技术有限公司 | Multi-format analysis card for acquiring video signal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000016223A1 (en) * | 1998-09-15 | 2000-03-23 | Acqiris | Modular data collection system |
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2014
- 2014-11-28 CN CN201410704654.2A patent/CN104408212B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201188664Y (en) * | 2008-01-22 | 2009-01-28 | 太原理工天成电子信息技术有限公司 | Multi-format analysis card for acquiring video signal |
Non-Patent Citations (2)
| Title |
|---|
| 基于FPGA的多通道高速数据采集系统;吴越等;《雷达科学与技术》;20121231;第10卷(第6期);摘要，第672页左栏第3段-第676页左栏第2段，图1、3 * |
| 基于USB2.0和DDR2的数据采集系统设计与FPGA实现;刘勇等;《电子元器件应用》;20101031;第12卷(第10期);第48页右栏第2段-50页右栏第2段 * |
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| Publication number | Publication date |
|---|---|
| CN104408212A (en) | 2015-03-11 |
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Effective date of registration: 20190329 Address after: Room 125, 1st Building, 6 Building, 4299 Jindu Road, Minhang District, Shanghai 201108 Patentee after: Shanghai Taiyu information technology Limited by Share Ltd Address before: 610000 No. 88 Tianchen Road, Chengdu High-tech Zone, Sichuan Province Patentee before: Chengdu Longteng Zhongyuan Information Technology Co., Ltd. |