What all is necessary to get floating point working?

[manasvb]

Hi,

Am using LPC55s69 EVK board, with Free-Rtos and floating point `FPv5-SP-D16 (Hard ABI)`.

In the FreeRtosConfig.h I have set this macro `configENABLE_FPU` to 1.

Basically I want to display floating numbers sent via UART.

I am storing my float number and the info that I want to send in a uint8_t buffer[], using sprintf, something like this

sprintf(buffer,"Float data:%f\r\n",3.14);

And using USART functions I send this buffer.

But on serial monitor I observe

Float data: 
ie(Float data: and whitespace(0x20)

How to solve this issue

[manasvb · Accepted solution]

Thanks,
But since I am using Redlib, this solved my problem

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/Redlib-floating-point-support-with-MCUXp...

[ErichStyger]

depending on your library used, you have to enable floating point support for the library, e.g.