Custom plots in VESC - Tool

Hey Max, this would be really useful. I'm looking at implementing the same feature for robotics applications which use custom VESC firmware.

I have added almost exactly that to our self driving model car platform, and it should be quite easy to add it to VESC Tool tool. The commands there are:

// Clear and initialize new plot with the namex and namey axis names
void commands_init_plot(char *namex, char *namey);

// Add graph to plot with name as legend
void commands_plot_add_graph(char *name);

// Select which graph to add data to
void commands_plot_set_graph(int graph);

// Add xy sample to selected graph
void commands_send_plot_points(float x, float y);

The UI can then be used to select which graphs are active and save the plots as PDF, PNG or XML data. The XML data can also be re-imported later.

I will have a look at it for the next release, or the one after.

I have added experiment plots to the latest version (VT 1.18, FW 3.60) now. You can use it like this:

commands_init_plot("Sample", "Voltage");
commands_plot_add_graph("Temp Fet");
commands_plot_add_graph("Input Voltage");
float samp = 0.0;

for(;;) {
	commands_plot_set_graph(0);
	commands_send_plot_points(samp, mc_interface_temp_fet_filtered());
	commands_plot_set_graph(1);
	commands_send_plot_points(samp, GET_INPUT_VOLTAGE());
	samp++;
	chThdSleepMilliseconds(10);
}

Usually I register some terminal command to initialize the plots and set a state variable to feed them with data.

This is what it looks like in VESC Tool:

You can have up to 5 graphs which can be enabled or disabled with the buttons at the top. The graphs can have names (which are shown in the legend) and you can also name the axes. The plotted data can be stored to XML files, which can be opened later. PNG and PDF export is also possible. I might add CSV export at some point.

Hello VESC Team,

Awesome work on the new version of the VESC tool.  I was wondering if there was more documentation on creating plots in the new VT 3.0.  I'm using the VESC in a dyno setup and would love to have access to read and plot more data including ADC values.  If anyone has done that it would be really helpful if you could point me in the right direction.  Many thanks.  

J