How can I print out float in mini

Topic

FAQ

How can I print out float in mini_printf?

wooseok

Sep 21, 2022 09:05

中 /A

hello~

In "telink_mesh_sdk", I want to output the float value to UART using the mini_printf function.

How do I modify the mini_printf function?

To use the "sprintf" function
I tried #include <stdio.h>
A compilation error occurs.

intmini_printf(constchar *format, ...){

    charspan;
    unsignedlongj;
    char *s;
    //char *msg;
    va_listarg_ptr;
    va_start(arg_ptr, format);

    while((span = *(format++))){
        if(span !=  % ){
            uart_put_char(span);
        }else{
            span = *(format++);
            if(span ==  c ){
                j = va_arg(arg_ptr,int);//get value of char
                uart_put_char(j);
            }elseif(span ==  d ){
                j = va_arg(arg_ptr,int);//get value of char
                #if0
                if(j<0){
                    uart_put_char( - );
                    j = -j;
                }
                #endif
                puti(j,DECIMAL_OUTPUT);
            }elseif(span ==  s ){
                s = va_arg(arg_ptr,char *);//get string value
                puts(s);
            }elseif(span ==  o ){
                j = va_arg(arg_ptr,unsignedint);//get octal value
                puti(j,OCTAL_OUTPUT);
            }elseif(span ==  x ){
                    j = va_arg(arg_ptr,unsignedint);//get hex value
                    puti(j,HEX_OUTPUT);
            }elseif(span == 0){
                break;
            }else{
                uart_put_char(span);
            }
        }

    }
    va_end(arg_ptr);
    return0;
}

TL_Soyo Sep 21, 2022 10:26

中 _/A

Hi,

mesh SDK support float print and float operations，please search this fuction (float_test()) to learn how to print float.

wooseok [Author] Sep 21, 2022 12:20

中 _/A

@Soyo

thank you reply.
I looked it up, but it's not there.

4 replies

TL_Soyo Sep 21, 2022 10:26

中 _/A

Hi,

mesh SDK support float print and float operations，please search this fuction (float_test()) to learn how to print float.

TL_Soyo Sep 21, 2022 13:52

中 _/A

Oh! you are using Telink mesh SDK,can you download sig mesh SDK（http://wiki.telink-semi.cn/tools_and_sdk/BLE_Mesh/SIG_Mesh/sig_mesh_sdk.zip）?

and reference it's code,copy to Telink Mesh SDK.