• State TI Thinks Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 4 answers
  • Subscribers 30 subscribers
  • Views 536 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MCF8315EVM: Uart Protocol

Andreas
Prodigy 170 points
Part Number: MCF8315EVM
Other Parts Discussed in Thread: MSP430FR2355, MCF8315A,

Hi TI Team

I will start evaluation of MCF8315 with the EVM Board. From the documents I found I saw there is a msp430fr2355 uC on the EVM doing the translation of "UART" Protocol to the MCF8315. Is a description or the Protocol from GUI to the EVM over Uart available? I would like to use my own simple gui to command the EVM...

Beste Regards,

Andreas

  • 0
    Prodigy 170 points

    in particular can I and how can I control the PWM value controlling the speed when J1 is set to PWM.

  • 0 in reply to Andreas
    TI__Expert 5578 points

    Hi Andreas,

    Thanks for your question on the motor drives E2E forum.

    On the EVM there is an onboard FTDI chip taking USB communication and translating it to UART for the on board MSP430 to take in the signals. From there the MSP430 translates the UART signals and send them as I2C signals to the device. The best way to control the MCF8315 device without the GUI is to interrupt the I2C lines with your own signals using a microcontroller attached to the I2C bridge in the center of the EVM:

    Let me know if you need further clarification!

    Best,

    Robert

  • 0 in reply to Robert Wedan
    TI__Expert 5578 points

    Hi Andreas,

    Just saw your second question, let me look further into that and get back to you by the end of the week.

    Best,

    Robert

  • 0 in reply to Robert Wedan
    TI__Expert 5578 points

    Hi Andreas, 

    You can control the speed through PWM using the SPEED pin in the MCF8315A also located on that communication bridge:

    Please review the datasheet for more information on the SPEED pin.

  • 0 in reply to Robert Wedan
    TI__Expert 5578 points

    Hi Andreas,

    If there are no more questions, could you please help mark this thread as resolved?

    I will close the thread for now, but feel free to open it again if you have an additional question around this topic.

     

    Best,

    Robert

  • 0 in reply to Robert Wedan
    TI__Genius 9220 points

    Hi Andreas,

    To add to Robert's response, on the MCF8315EVM, the potentiometer is also routed to the MSP430FR2355, which uses an ADC to sample the voltage and generate a PWM with varying duty cycle depending on the potentiometer voltage.

    Therefore, when the jumper J1 is configured to PWM, you can simply use the potentiometer to control the duty cycle of the PWM generated by the MSP430.

    Regards,
    Eric C.