[MM32 eMiniBoard Review] Part 5: ADC acquisition and host computer oscilloscope display

w494143467

[MM32 eMiniBoard Review] Part 5: ADC acquisition and host computer oscilloscope display [Copy link]

 

1. Introduction

Originally, I wanted to realize the acquisition of two ADC channels and display them on the host computer at the same time, but the acquisition of the two ADC channels was not completed, so this time the host computer oscilloscope showed only one ADC channel. The dual-channel oscilloscope display will wait until next time. This time, let’s take a look at the single-channel ADC oscilloscope.

2. Lower computer program

The lower computer program is very simple. Just use the ADC routine and modify the content to be sent. The main program is shown in Figure 1.

3. Host computer program

The host computer program is rather complicated and took a long time to write. The first thing is to configure some parameters of the serial port. I will simply post the configuration of the serial port parameters, as shown in Figure 2.

Then open the corresponding serial port. After opening the serial port, the data of the lower computer will be sent to the upper computer. The lower computer sends data once every 500ms.

Because the QWT space is used directly, the image display is relatively simple, but the control display is more troublesome. It is necessary to configure the horizontal and vertical coordinates and dynamically move the X-axis. These processes are more troublesome.

Let's take a look at the final effect. The sliding resistor on the development board is cyclic, so it will go from one extreme value to another in one rotation. The picture here is not demonstrated, but you can try it yourself.

4. Summary

The main content of this article is on the host computer. The reason why we need to write this host computer is mainly to be able to display data without converting the data into charts through Excel.

freebsder

Try uc-probe (free) or freemaster. I am using the latter for product debugging. . .

w494143467

freebsder posted on 2020-11-14 22:59 Try uc-probe (free) or freemaster. I am using the latter for product debugging. . .

Are these two also serial port oscilloscopes?

freebsder

w494143467 posted on 2020-11-15 10:55 Are these two also serial port oscilloscopes?

The functions of a serial port oscilloscope are too basic, so take some time to learn about professional debugging tools.