S32KのトピックRe: S32K144 RTD UART BaudRate

S32K144 RTD UART BaudRate

SPK_FW — Thu, 23 May 2024 12:38:20 GMT

Hi,

I am using S32k144 with RTD drivers(V2.0.0 P04).

I want to generate a Baud rate of 1 Mbps for UART2. UART2 is running at 48MHz on FIRCDIV2_CLK. My FIRC is 48MHz.

In configuration Under Custom baud rate applying SBR as 12 & OSR as 4 shows me baudrate of 1000000.

When i tried to sent a data, wrong values is received in my analyser.

When i tried same data with 115200 baudrate (which is standard value from dropdown) data received is correct.

With 1 Mpbs only i am seeing this issue.

Is this SBR as 12 & OSR as 4 correct if not can i get a correct value or how to calculate it?

Thank you

Re: S32K144 RTD UART BaudRate

VaneB — Fri, 24 May 2024 20:20:50 GMT

Hi @SPK_FW

Could you please verify your real BaudRate using the function Lpuart_Uart_Ip_GetBaudRate()? Also, when you said " With 1 Mpbs only I am seeing this issue" does it mean that the transition and reception are successful with other custom baud rates?

B.R.

VaneB

Re: S32K144 RTD UART BaudRate

SPK_FW — Tue, 28 May 2024 10:45:42 GMT

Hi VaneB,

Thanks for reply.

I figured out the issue. OSR is doing a (-1) before loading to register.

When i made calculation this got messed up.

Thank you