Niranjan Ravi

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6 years ago.

UART communication in FRDM k64F

Hi,

My code:

#include "mbed.h"
#include "math.h"
#include <string.h>

Serial pc(USBTX, USBRX);
Serial sendingData(PTC17, PTC16);
Serial receivingData(PTD3,PTD2);
char        message[] = "coap CON GET fd61:7409:e1d2:56f2:587f:c682:5d9c:6951 /temp\n";
char data[2];
char command[80];

int main()
{
   pc.baud(115200);
   sendingData.baud(115200);
   receivingData.baud(115200);
   while(1)
   {    
       sendingData.printf("%s", message);
       if (sendingData.readable())
        {
            sendingData.gets(command, 80);
        }   
       uint8_t i = command[64];
       uint8_t j = command[65];
       printf("%c" , i);
       printf("%c" , j);
       for(int k = 0; k < 1 ; k++)
       {
           data[k]=command[64];
           k++;
           data[k]=command[65];
       }     
       receivingData.puts(data); //FormatToSend  
       wait(30.0);
    }  
}

In the above code sendingData.printf("%s", message) does send the command to KW41Z board. I understand this while(1) works on a continuous loop but the problem is

<<code>> uint8_t i = command[64]; uint8_t j = command[65]; printf("%c" , i); printf("%c" , j); <</code>

the commands are not able to read the data when I add the wait time inside while(1) or when I add this sendingData.printf("%s", message) inside while(1) loop.

I want to send command [message] every 5 minutes from K64F board and receive the data back in every 5 minutes. Any ideas on how to do it?

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