3 Replies Latest reply on Oct 5, 2016 11:50 AM by JoMe_264151

Converting float to char [] to print in UART.

cohyc_1242406 Oct 5, 2016 8:46 AM

This seems extremely trivial but I'm trying to convert a float to the char [] so I can print it out in UART. Here is how I'm trying to achieve this:

char buff[10]; float test = 2.32 sprintf(buff, "%f", test); UART_UartPutString(buff);

However doing this nothing is printing out...The above is what i've seen on all the examples :,( why isn't this working for me.

1. Re: Converting float to char [] to print in UART.

JoMe_264151 Oct 5, 2016 10:39 AM (in response to cohyc_1242406)

As I stated in another of your threads: To use sprintf for floats you need to set

Use newlib nano

Use newlib nano float formatting

Heap size 0x0200



Bob
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2. Re: Converting float to char [] to print in UART.

cohyc_1242406 Oct 5, 2016 11:06 AM (in response to JoMe_264151)

You're right, I apologize. I'm so in over my head trying to get this project to work I miss some things.

Does the heap size have to be that exactly? Or at least 0x0200?

side note: I deeply deeply appreciate all you're help.
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3. Re: Converting float to char [] to print in UART.

JoMe_264151 Oct 5, 2016 11:50 AM (in response to cohyc_1242406)

I did not take the time to find out the minimum value, but 0x0200 seem to be large enough for heap.

Bob
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