BREAKING: PWMAudio availableForWrite report bytes (#3090)

earlephilhower · web-flow · commit fa19d119a881 · 2025-08-20T18:23:38.000-07:00
availableForWrite should always report bytes free, but PWMAudio was
returning number of ARB words (i.e. 1/4 the actual space).
diff --git a/libraries/PWMAudio/src/PWMAudio.cpp b/libraries/PWMAudio/src/PWMAudio.cpp
@@ -219,7 +219,7 @@ int PWMAudio::availableForWrite() {
     if (!_running) {
         return 0;
     }
-    return _arb->available();
+    return _arb->available() * 4; // ARB reports in 32b words
 }
 
 size_t PWMAudio::write(int16_t val, bool sync) {

Original file line number	Diff line number	Diff line change
`@@ -219,7 +219,7 @@ int PWMAudio::availableForWrite() {`
`219`	`219`	`if (!_running) {`
`220`	`220`	`return 0;`
`221`	`221`	`}`
`222`		`- return _arb->available();`
	`222`	`+ return _arb->available() * 4; // ARB reports in 32b words`
`223`	`223`	`}`
`224`	`224`
`225`	`225`	`size_t PWMAudio::write(int16_t val, bool sync) {`