Model-Based Design Toolbox (MBDT)のトピックDevkit MPC5744P rev.e data problem

Devkit MPC5744P rev.e data problem

haoxue1027 — Tue, 08 Sep 2020 02:57:42 GMT

Hello，

Now，I recevied the data which is changed from 0 to 2pi.

But I want the value from -pi to pi.

So I set the program " if data > pi, data = data-2*pi"

When the data <pi , the data is correct in the freemaster.

But if the data >pi , the data is big negative numbers.

Can you tell me why? how to change the data to [-pi pi]?

Any help will be appreciated.

best regards

hao

mariuslucianand — Mon, 14 Sep 2020 12:59:30 GMT

Have you tried to check the data type? Maybe the FreeMaster tries to display as integer and you stores in the MCU like float.

Hope this helps,

Marius

haoxue1027 — Thu, 17 Sep 2020 09:19:29 GMT

I have found the reason.

Beacuse in the sincon block , the input theta is set to [-pi,pi].

But in my simulink, the input is 0 to 2pi.

Therefore, when the data is greater than pi, an abnormal data is displayed.

best regards

hao