CUSTOM BAUD RATE FOR UART

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CUSTOM BAUD RATE FOR UART

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anshulkhare
Contributor III

Hello All,

i am using IMX6UL Board as per my requirement I need a custom baud rate of 1.8Mbps on a serial port to talk to a device. 

by default baud rate is coming as 115200 .

I understand that the UART clock speed is derived from a main clock that is used for CPU and other subsytem.  Where do I start looking to change the baud rate for the UART?

Thanks,

Anshul

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igorpadykov
NXP Employee
NXP Employee

Hi Anshul

i.MX uart driver supports standard linux serial APIs, one can use for example stty :

serial port - How to set a custom baud rate on Linux? - Stack Overflow 

iMX6: UART refuse to set baud rate to 1 Mbps 

check dts file for uart clocking linux/arch/arm/boot/dts/imx6ul.dtsi
clocks = <&clks IMXUL_CLK_UART_SERIAL>; ..
described in Figure 18-3. Clock Tree - Part 2 i.MX6UL Reference Manual

http://www.nxp.com/docs/en/reference-manual/IMX6ULRM.pdf 

Best regards
igor
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