TMS320F2800137: ecap

zhou qicheng

Part Number: TMS320F2800137
Other Parts Discussed in Thread: C2000WARE

Tool/software:

C:\Users\xiaohua\Desktop\013\x15\universal_motorcontrol_lab_f280013x

Hello,

Hello, do you have an example of tms320f2800137 ecap1 input capture?
D:\ti\c2000\C2000Ware_MotorControl_SDK_5_02_00_00\c2000ware\device_support\f280013x\examples\ecap In this example, without the relevant configuration of ecap, it is impossible to obtain duty cycle equivalence

3 months ago

0 Ryan Ma 3 months ago

TI__Mastermind 25616 points

Hi Zhou,

zhou qicheng said:
Hello, do you have an example of tms320f2800137 ecap1 input capture?

Yes we do have eCAP examples in our C2000WARE SDK. This can be found here.

C:\ti\c2000\C2000Ware_x_xx_xx_xx\driverlib\f280013x\examples\ecap

Video resources and Labs.

1. https://dev.ti.com/tirex/explore/node?node=A__AfHMivsQW9ePIBGHBD.-Zg__C28X-ACADEMY__1sbHxUB__LATEST

2.https://dev.ti.com/tirex/explore/node?node=A__ASXXwGbQ.ubt5o3S3jXEvA__C28X-ACADEMY__1sbHxUB__LATEST

3. https://www.ti.com/video/5575279678001

4. https://www.youtube.com/watch?v=r-mzvoF0gE0

Best,

Ryan Ma

0 zhou qicheng 3 months ago in reply to Ryan Ma

Intellectual 790 points

Hello, C:\ti\c2000\C2000Ware_x_xx_xx_xx\driverlib\f280013x\examples\ecap Hello, my ecap example is transplanted to C: \ users \ xiaohua \ desktop \ 013 \ x15 \ universal _ motor control _ lab _ f280013x,

I want to control the motor through pwm communication, but I found that the sampled pwm duty ratio and high-level time are accurate when the motor is not rotating, but once the motor is started, the captured value is always abnormal, sometimes zero, and sometimes the motor is started abnormally. Give specific reasons

0 Ryan Ma 3 months ago in reply to zhou qicheng

TI__Mastermind 25616 points

Hi Zhou,

I cannot provide much information regarding why starting the motor causes inaccuracy.

Can you scope the PWM output pins while the motor is spinning? Are there any induced noise occurring on the captured pins? That could cause some abnormal readings.

Best,

Ryan Ma

C2000™︎ microcontrollers

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TMS320F2800137: ecap