Diff: mbed-os/features/unsupported/tests/mbed/freopen/main.cpp

Revision:

0:6bf0743ece18

diff -r 000000000000 -r 6bf0743ece18 mbed-os/features/unsupported/tests/mbed/freopen/main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os/features/unsupported/tests/mbed/freopen/main.cpp	Sat Mar 28 15:28:19 2020 +0000
@@ -0,0 +1,35 @@
+#include "mbed.h"
+
+#if !DEVICE_LOCALFILESYSTEM
+  #error [NOT_SUPPORTED] LocalFileSystem not supported
+#endif
+
+#include "TextLCD.h"
+
+int main() {
+    printf("printf to stdout\n");
+
+    // printf to specific peripherals
+    Serial pc(USBTX, USBRX);
+    pc.printf("Serial(USBTX, USBRX).printf\n");
+
+    TextLCD lcd(p14, p15, p16, p17, p18, p19, p20, "lcd"); // rs, rw, e, d0-d3, name
+    lcd.printf("TextLCD.printf\n");
+
+    // change stdout to file
+    LocalFileSystem local("local");
+    freopen("/local/output.txt", "w", stdout);
+    printf("printf redirected to LocalFileSystem\n");
+    fclose(stdout);
+
+    // change stdout to LCD
+    freopen("/lcd", "w", stdout);
+    printf("printf redirected to TextLCD\n");
+    fclose(stdout);
+
+    DigitalOut led(LED1);
+    while (true) {
+        led = !led;
+        wait(1);
+    }
+}