Added LED PWM test

libraries/tests/mbed/pwm_led/pwm.cpp

@@ -0,0 +1,26 @@
+#include "mbed.h"
+
+#ifdef TARGET_NUCLEO_F103RB
+PwmOut led(D3);
+#else
+#error This test is not supported on this target.
+#endif
+
+int main() {
+    float crt = 1.0, delta = 0.05;
+
+    led.period_ms(2); // 500Hz
+    while (true) {
+        led.write(crt);
+        wait_ms(50);
+        crt = crt + delta;
+        if (crt > 1.0) {
+            crt = 1.0;
+            delta = -delta;
+        }
+        else if (crt < 0) {
+            crt = 0;
+            delta = -delta;
+        }
+    }
+}

workspace_tools/tests.py

@@ -408,7 +408,12 @@ TESTS = [
         "dependencies": [MBED_LIBRARIES],
         "mcu": ["LPC1768", "LPC4088"]
     },
- 
+    {
+        "id": "MBED_31", "description": "PWM LED test",
+        "source_dir": join(TEST_DIR, "mbed", "pwm_led"),
+        "dependencies": [MBED_LIBRARIES],
+    },
+
     # CMSIS RTOS tests
     {
         "id": "CMSIS_RTOS_1", "description": "Basic",