fix(usart): tx / rx complete timing

urish · urish · commit e019ee8e002f · 2021-07-16T00:39:30.000+03:00
fix the calculation of cyclesPerChar, which is used to determine when a USART RX/TX operation is marked complete.
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() {

Original file line number	Diff line number	Diff line change
`@@ -210,7 +210,7 @@ export class AVRUSART {`
`210`	`210`
`211`	`211`	`private get cyclesPerChar() {`
`212`	`212`	`const symbolsPerChar = 1 + this.bitsPerChar + this.stopBits + (this.parityEnabled ? 1 : 0);`
`213`		`- return (this.UBRR * this.multiplier + 1) * symbolsPerChar;`
	`213`	`+ return (this.UBRR + 1) * this.multiplier * symbolsPerChar;`
`214`	`214`	`}`
`215`	`215`
`216`	`216`	`private get UBRR() {`