LAUNCHXL-F28379D: how to save the incoming SCI data as an integer ?

Hi Silsio,

You want to send the result of the comparison via SCI, or you want to do something else with it?

I think one possible issue is that the received character will be in ASCII and if you want to do numeric comparisons you should turn it into a numeric first (by subtracting 48)?

ascii '0' = 48 decimal, '1' = 49, etc.

and then when you have a numeric result you want to send (or a bool 1 or 0) you need to add 48, otherwise you will get the characters at the start of the ascii definition?

0 decimal = 'null' character, 1 decimal = 'heading', etc.

I'm receiving data from a inertial sensor. I want to use this data to manipulate another part of the code. So, in order to do that, I need the incoming values to be as integers that i can compare. I tried using uint16 and see how the output reads as:

SCIBREGS' SAR value is 45 which means that it is '-' equivalent in decimals. 

It can be seen that the output on the comport is pretty accurate. However, I am not able to use it to compare. 

I hope this is much clear now.

Hi silso,

So a reading from the sensor in this case will be 6 char's received as 6 separate SCI words?

Before compare you'd want to write a function that turns the character string into a float. Probably there is an in-built C function that you can use, or you'd do something like:

(char[1] - 48)*10 + (char[2] - 48)*1 + (char[4] - 48)*0.1 + char[5] - 48)*0.01

(But you'd need to make it robust to work for different signs and possibly different lengths)

Hi, I'm trying to print it out in char array but it prints out proper values for some time but goes back to garbage values and stops printing. Here is my logic:

       for(;;)
       {
           //sprintf(msg,"%d",ScibRegs.SCIRXBUF.all);/ wait for empty state

                //
                // Get character
                //
           while(ScibRegs.SCIFFRX.bit.RXFFST == 0) { }
           int i;
           i = 0;
           msg[i]=ScibRegs.SCIRXBUF.all;
           while(msg[i] != '\n')
           {
                   scia_xmit(msg[i]);
                   i++;
               }
       }
void scia_xmit(Uint16 a)
{
    while (SciaRegs.SCIFFTX.bit.TXFFST != 0) {}
    SciaRegs.SCITXBUF.all =a;
}

What might be issue?

Hi Silsio,

Are you sure that all your messages will end with a '\n'? If not, maybe a message just keeps printing past the end of the buffer?

Hi Devin, thank you for your quick response. yes, there is '\n'. Here is the part of code in arduino: LOG_PORT.print(TO_DEG(yaw));LOG_PORT.println();

Also, I used logic analyzer to verify if the packets have '\n' and it showed it at the end of the packet.