S32 Design studio project no "ARM EWL" libraries support

[LeoZ]

when I refer Example S32K_printf_implementation - S32DS_1.0 - NXP Community this topic,

it mentioned bellow 'libraries support' setting, 

but in my project, there is no this selection,

my environment: S32 Design Studio 3.5, MCU: S32K358

how could I add aforementioned "ewl_c" selection 

[Robin_Shen]

Hi LeoZ,

Do you want to implement printf by LPUART peripheral, or by Semihosting when debugging?  Attached project implementing Printf by UART, it is based on S32DS v3.4 + S32K3 RTD 0.9.0. Although the RTD version and part number are different, I hope it will be helpful to you.

Best Regards,
Robin

[LeoZ]

Thank you, I want to use printf for uart, and I succeeded in S32K358 referring to your project. 

While I found it can not send floating number, then I refer to 浮点数在串口打印的函数  to convert float number to string to send,

I do not know if there is better way to print floating number

[Robin_Shen]

Did you checked the Support printf float format for newlib_nano library (-u_printf_float) ?

[LeoZ]

thank you, checking that solved my problem

btw: from the warning, it takes '(float32) a' as a double,  I am not sure if it will cost more uart time to take 'a' as double than single-floating, (if so) then if existing some way to modify printf for it. anyway, this question is not important, just curious.