fine tune delay after export. Testing fast SSD failed at 25 ms, worke…

…d 99% at 30. Set to 70 ms. Also, fixed bug if application with no pwm config shutdown value call pwm.shutdown(), then pi4j shutdown would invoke unexport a second time
Pi4J · Apr 4, 2024 · ba13376 · ba13376
1 parent 7c2b149
commit ba13376
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/...ns/pi4j-plugin-linuxfs/src/main/java/com/pi4j/plugin/linuxfs/provider/pwm/LinuxFsPwm.java b/...ns/pi4j-plugin-linuxfs/src/main/java/com/pi4j/plugin/linuxfs/provider/pwm/LinuxFsPwm.java
@@ -86,7 +86,7 @@ public Pwm initialize(Context context) throws InitializeException {
                 logger.trace("exporting PWM [" + this.config.address() + "]; " + pwm.getPwmPath());
                 pwm.export();
                 // Delay to allow the SSD to persist the new directory and device partitions
-                Thread.sleep(250);
+                Thread.sleep(70);
             } else{
                 logger.trace("PWM [" + this.config.address() + "] is already exported; " + pwm.getPwmPath());
             }
@@ -224,7 +224,9 @@ public Pwm shutdown(Context context) throws ShutdownException {
         // otherwise ... un-export the GPIO pin from the Linux file system impl
         try {
             logger.trace("un-exporting PWM [" + this.config.address() + "]; " + pwm.getPwmPath());
-            pwm.unexport();
+            if(pwm.isExported()) {
+                pwm.unexport();
+            }
         } catch (java.io.IOException e) {
             logger.error(e.getMessage(), e);
             throw new ShutdownException("Failed to UN-EXPORT PWM [" + config().address() + "] @ <" + pwm.systemPath() + ">; " + e.getMessage(), e);