LPC54628 Printf Floating numbers doesnt have minus sign

alpcaner92 — Sat, 06 Mar 2021 18:51:44 GMT

Hi,

I have a LPC54628 dev board. Im trying to print signed floating numbers, however negative sign is not printed.

I did the following changes which works for decimal numbers but not floating numbers.

PRINTF_ADVANCED_ENABLE=1

PRINTF_FLOAT_ENABLE=1

Here is the code.

Current = -0.001A

SHELL_Printf(" %.4fV %fA\r\n",temp,Current);

I tracked down to the inner functions of Printf, I found out that the sign is lost during casting.

fval loses the sign after cast. This function is in fsl_str.c file.

Can you help me?

Regards,

Caner

Re: LPC54628 Printf Floating numbers doesnt have minus sign

Alice_Yang — Tue, 09 Mar 2021 02:48:07 GMT

Hello,

Please choose Newlib to test:

Regards,

Alice