fix(usart): tx / rx complete timing

fix the calculation of cyclesPerChar, which is used to determine when a USART RX/TX operation is marked complete.
wokwi · Jul 15, 2021 · e019ee8 · e019ee8
1 parent bfc8ed9
commit e019ee8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/peripherals/usart.ts b/src/peripherals/usart.ts
@@ -210,7 +210,7 @@ export class AVRUSART {
 
   private get cyclesPerChar() {
     const symbolsPerChar = 1 + this.bitsPerChar + this.stopBits + (this.parityEnabled ? 1 : 0);
-    return (this.UBRR * this.multiplier + 1) * symbolsPerChar;
+    return (this.UBRR + 1) * this.multiplier * symbolsPerChar;
   }
 
   private get UBRR() {