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kw41

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koonlee
Contributor I

Hi,

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

Thanks,

Koon

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koonlee
Contributor I

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

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estephania_mart
NXP TechSupport
NXP TechSupport

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. 

9795F978.PNG

Regards, 

Estephania

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sensenthuran
Contributor IV

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;

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estephania_mart
NXP TechSupport
NXP TechSupport

Hello, 

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

pastedImage_1.png

Regards, 

Estephania 

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koonlee
Contributor I

Hi Estephania,

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

Thanks,

Koon

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estephania_mart
NXP TechSupport
NXP TechSupport

Hello, 

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

Regards ,
Estephania 

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