tool/mbed/mbed-sdk/libraries/tests/mbed/freopen/main.cpp

   1 #include "mbed.h"
   2 #include "TextLCD.h"
   3
   4 int main() {
   5     printf("printf to stdout\n");
   6
   7     // printf to specific peripherals
   8     Serial pc(USBTX, USBRX);
   9     pc.printf("Serial(USBTX, USBRX).printf\n");
  10
  11     TextLCD lcd(p14, p15, p16, p17, p18, p19, p20, "lcd"); // rs, rw, e, d0-d3, name
  12     lcd.printf("TextLCD.printf\n");
  13
  14     // change stdout to file
  15     LocalFileSystem local("local");
  16     freopen("/local/output.txt", "w", stdout);
  17     printf("printf redirected to LocalFileSystem\n");
  18     fclose(stdout);
  19
  20     // change stdout to LCD
  21     freopen("/lcd", "w", stdout);
  22     printf("printf redirected to TextLCD\n");
  23     fclose(stdout);
  24
  25     DigitalOut led(LED1);
  26     while (true) {
  27         led = !led;
  28         wait(1);
  29     }
  30 }