LAUNCHXL-F280049C: Sending integer values through SCI

Nesli

Part Number: LAUNCHXL-F280049C
Other Parts Discussed in Thread: C2000WARE

I am trying to send a message repeatedly from SCI with an integer value counting up. The messages should look like this:

"The number is 0

The number is 1

The number is 2

..."

What I have so far is this:

int n = 0;
unsigned char *msg;
msg = "\r\nThe number is";
for(;;)
{
SCI_writeCharArray(SCIA_BASE, (uint16_t*)msg, 15);
?????
n++;
}

Which function should I use for the line I marked ????? in order to send the value of n? All library functions for SCI are for sending chars. I tried including "stdlib.h" and using the itoa() function, but it doesn't work for some reason returning the error:

unresolved symbol _itoa, first referenced in ./main.obj

#include "stdlib.h"
...
void main(void){
... //Initialize SCI
int n = 0;
unsigned char *val;
unsigned char *msg;
while(1)
{
msg = "\r\nNo: ";
SCI_writeCharArray(SCIA_BASE, (uint16_t*)msg, 4);
itoa(n, val, 10);
SCI_writeCharArray(SCIA_BASE, (uint16_t*)val, sizeof(val));
n++;
}
}

I also tried using sprintf to create a new string but it didn't work either. Is there a simple way of including an integer into the message sent by SCI?

over 6 years ago

0 Ken Schachter over 6 years ago

TI__Genius 17315 points

Nesli,

Please see our F28004x SCI example code, which can be found at:

C:\ti\c2000\C2000Ware_<version>\driverlib\f28004x\examples\sci

I hope this helps. If this answers your question, please click the green "Verified Answer" button. Thanks

- Ken

0 Nesli over 6 years ago in reply to Ken Schachter

Prodigy 115 points

I already checked all three of the sci examples, but again they are for receiving and sending chars. For example:

//code from SCI interrupt echoback example.

uint16_t receivedChar;
receivedChar = SCI_readCharBlockingNonFIFO(SCIA_BASE);

//
// Echo back the character.
//
msg = "  You sent: \0";
SCI_writeCharArray(SCIA_BASE, (uint16_t*)msg, 13);
SCI_writeCharBlockingNonFIFO(SCIA_BASE, receivedChar);

From what I understand, by using this code I am only able to send/receive one char, which means if I want to send numbers with more than one digit I'd have to check how many digits the number has and call SCI_writeCharBlockingNonFIFO() for each of the digits. I am looking for a simpler way than that if it exists, since the number I want to print can have several digits.

0 Ken Schachter over 6 years ago in reply to Nesli

TI__Genius 17315 points

Nesli,

Yes, you are correct. The SCI sends/receives one character at a time. To send/receive multiple characters you can use the FIFOs. You would need to manage the number of characters by configuring the FIFO registers.

I hope this helps. If this answers your question, please click the green "Verified Answer" button. Thanks

- Ken

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LAUNCHXL-F280049C: Sending integer values through SCI