make driveControl flags volatile

acemielektron · acemielektron · commit 8061342f099a · 2022-05-11T17:56:30.000+03:00
* occasionally FlopptDrive::run continues despite selected drive select line getting deasserted if it is caused by compiler optimizations defining drive status flags volatile might help
diff --git a/src/FloppyDrive.h b/src/FloppyDrive.h
@@ -129,7 +129,7 @@ struct __attribute__((__packed__)) driveControlFlags
 class driveStatus
 {
 	private:
-		struct driveControlFlags f;		
+		volatile struct driveControlFlags f;		
 	public:
 		driveStatus() {f.driveSel = 0; f.trackChanged = 0;}
 		void setTrackChanged() {f.trackChanged = 1;}

Original file line number	Diff line number	Diff line change
`@@ -129,7 +129,7 @@ struct __attribute__((__packed__)) driveControlFlags`
`129`	`129`	`class driveStatus`
`130`	`130`	`{`
`131`	`131`	`private:`
`132`		`- struct driveControlFlags f;`
	`132`	`+ volatile struct driveControlFlags f;`
`133`	`133`	`public:`
`134`	`134`	`driveStatus() {f.driveSel = 0; f.trackChanged = 0;}`
`135`	`135`	`void setTrackChanged() {f.trackChanged = 1;}`