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Altera_Forum
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12 years ago

nios rs232 uart reads only last byte

Hi, I'm using rs232 uart in nios. I'm using the open and read functions to recive data from the uart. I'm using the serial port monitor in order to send data on rs232 from the computer to t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Here is an example to detect some characters:

char* msg = "Detected the character 't'.\n";

FILE* fp;

char prompt = 0;

fp = fopen ("/dev/uart1", "r+"); //Open file for reading and writing

if (fp)

{

while (prompt != 'v')

{ // Loop until we receive a 'v'.

prompt = getc(fp); // Get a character from the UART.

if (prompt == 't')

{ // Print a message if character is 't'.

fwrite (msg, strlen (msg), 1, fp);

}

}

fprintf(fp, "Closing the UART file.\n");

fclose (fp);

}

return 0;