fix(timer): setting TCNT doesn't update OCRA #111

1 files changed, 8 insertions, 0 deletions

diff --git a/src/peripherals/timer.ts b/src/peripherals/timer.ts
index b597d07..53777e2 100644
--- a/src/peripherals/timer.ts
+++ b/src/peripherals/timer.ts
@@ -576,6 +576,14 @@ export class AVRTimer {
     if (this.tcntUpdated) {
       this.tcnt = this.tcntNext;
       this.tcntUpdated = false;
+      if (
+        (this.tcnt === 0 && this.ocrUpdateMode === OCRUpdateMode.Bottom) ||
+        (this.tcnt === this.TOP && this.ocrUpdateMode === OCRUpdateMode.Top)
+      ) {
+        this.ocrA = this.nextOcrA;
+        this.ocrB = this.nextOcrB;
+        this.ocrC = this.nextOcrC;
+      }
     }
     if (this.updateDivider) {
       const { CS } = this;