Both systems send data simultaneously

win0777

Both systems send data simultaneously [Copy link]

Scenario:

Systems A and B collect data separately and send them to a terminal, which makes consistency judgment at the receiving end. However, both systems need to send data at the same time. Without adding a timing chip, how can you solve this problem?

maychang

[Systems A and B each collect data and send it to one terminal]

I don't know what the two "systems" you are talking about are. My guess is that they are two data acquisition modules.

maychang

[Systems A and B each collect data and send it to one terminal]

What communication method is used? Serial or parallel? This post was posted on the MCU forum, so it must be a MCU. No matter which communication method is used, the MCU cannot receive at the same time. Only one module can send first, and then the other module can send after the module has finished sending.

maychang

[But the two systems need to send data at the same time. Without adding a timing chip, how do you solve this problem? ]

I guess you want to let the two data acquisition modules know when to send data to the upper computer. This can be done by the upper computer sending a signal to the data acquisition module (lower computer). When the upper computer is ready to receive, it sends a [Start] signal to a lower computer, and the lower computer sends the data. After the upper computer has received the data, it sends a [Start] signal to the other lower computer, and the other lower computer sends the data. After both sets of data are received, the upper computer performs comparison and verification.

chunyang

The problem description is not clear. If you want to get timely and effective help, first learn to describe the problem correctly and completely.

秦天qintian0303

This cannot be fully achieved at the same time. There must be a collection cycle for the collection system, which can be allocated by the host. We can only try to reduce the interval between the two systems. For example, after the host notifies system 1 to report, it immediately notifies system 2 to report. Different types of data generally have different collection cycles.

freebsder

One physical link cannot run two communications at the same time and can only be time-shared.

suncat

If you want to express how to distinguish whether the data on a link comes from A or B, you can add distinguishing information to the data, such as address information. Data lines such as I2C, SPI, and CAN can all add address information.