topic Re: Baud Rate change on uc by MODBUS POLL in Kinetis Microcontrollers

Baud Rate change on uc by MODBUS POLL

andréluis — Mon, 24 Sep 2018 17:31:29 GMT

Hi, my name is André. I'm using the software MODBUS POLL to read some data in an application. I make a circuit using the MKL26 to send/receive the data to USB to RS485. The problem is when i need to change the baudrate in the uc. I dont find the data when i change the baudrate in uc to work with other device. I send an image to show how i change the baudrate.

Thanks for the help.

Re: Baud Rate change on uc by MODBUS POLL

miduo — Wed, 26 Sep 2018 07:40:36 GMT

Hello,

I am not sure if you are using the NXP evaluation boar or just customer board? And how did you config the UART port? You mean that it does not work at 38400 baud, however, please let me know if it work normal under 19200?

Re: Baud Rate change on uc by MODBUS POLL

andréluis — Wed, 26 Sep 2018 11:30:42 GMT

Hi Fang Li. Its a customer board. I configure the UART with 19200, 8 bits, None parity and 1 bit to stop. The problem is when i change the baud rate in software, i need to verify this change e modify my baud rate in MCU. The problem is i dont find where in the software i see the change of data. I'm using the example usb cdc of the site MCU on eclipse.