TM4C1294NCPDT: Sending integer ui32_t through tcp_write

Rocamadour

Part Number: TM4C1294NCPDT

Hi,

I am trying to send data from adc reads via Ethernet, I am using the lwip stack, I can send simple TCP-Data like string and char, but I can’t send data as integer type. I understand that tcp_write deals bytes, and I am trying to use a pointer with no succes.

Anyone could give me an example on how do this? I have been trying several things besides the pointers, perhaps someone has experienced this or any fresh look will be great.

Best

over 7 years ago

0 Charles Tsai over 7 years ago

TI__Guru**** 191906 points

Hi,
Below is one idea to do it. You can extend this idea to suit your application.

uint32_t adc_data = 1234;
char pcBuf[4];
uint32_t len = sizeof(pcBuf);

usprintf(pcBuf, "%d", adc_data );

err = tcp_write(testpcb, &pcBuf[0], len, TCP_WRITE_FLAG_COPY);

0 Rocamadour over 7 years ago in reply to Charles Tsai

Intellectual 255 points

Thanks very much Charles, this solved the problem. But now the problem is that make very slow the conversion process (I hace a 3700 data array), I assume is the usprintf function, is there any other way to avoid it?

0 Charles Tsai over 7 years ago in reply to Rocamadour

TI__Guru**** 191906 points

Hi,
I think you can write your own function to convert from integer to ASCII.

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TM4C1294NCPDT: Sending integer ui32_t through tcp_write