topic Re: kw41 in Kinetis Microcontrollers

kw41

koonlee — Mon, 11 Mar 2019 19:03:46 GMT

Hi,

What is the max baud rate for KW41's UART?

Thanks,

Koon

Re: kw41

stephanie_m — Tue, 12 Mar 2019 18:54:31 GMT

Hello,

It will depend on the clock configuration you are using, could you please provide more details ?

Regards ,
Estephania

Re: kw41

koonlee — Tue, 12 Mar 2019 19:06:05 GMT

Hi Estephania,

I have an external 32MHz xtal connected to pin 21 and 22. I can change the schematic/configuration to facilitate the higher baud rate. The datasheet mentions about 115200 baud rate and I need at least 230400. Would be great if we can achieve higher.

Thanks,

Koon

Re: kw41

stephanie_m — Thu, 14 Mar 2019 02:33:45 GMT

Hello,

Using the examples with and without the wireless connectivity framework it was possible to set the frequency of your interest in the KW41. For example, if you are trying to use it in the wireless uart demo you will need to modify the following files.

Regards,

Estephania

Re: kw41

sensenthuran — Thu, 14 Mar 2019 17:20:56 GMT

estephania_martinez‌

If we are using the FSCI interface, in the following file

UARTConfiguration.h

the speed 230400 is not defined. What we should do in this case?

/**
* @brief Baudrate values for opening a UART device.
*/
typedef enum {
BR110,
BR300,
BR600,
BR1200,
BR2400,
BR4800,
BR9600,
BR19200,
BR38400,
BR57600,
BR115200,
BR921600,
} Baudrate;

Re: kw41

stephanie_m — Thu, 14 Mar 2019 18:56:19 GMT

Hello,

You can check in the serial manager the following definitions where the 230400 it's included.

Regards,

Estephania

Re: kw41

koonlee — Fri, 21 Jun 2019 19:03:48 GMT

Hi Estephania,

serialUartBaudRate_t only define up to gUARTBaudRate230400_c. Is it possible to run at 230400x2 => 460800?

Thanks,

Koon