From 7ce90c4d319aa62c53cd0046041b7529b75f5b4d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert=20J=C3=B6rdens?= <rj@quartiq.de>
Date: Thu, 4 Feb 2021 12:47:35 +0100
Subject: [PATCH] input stamper: add deglitching

---
 src/hardware/digital_input_stamper.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/hardware/digital_input_stamper.rs b/src/hardware/digital_input_stamper.rs
index 1aa0bb1..cc764f5 100644
--- a/src/hardware/digital_input_stamper.rs
+++ b/src/hardware/digital_input_stamper.rs
@@ -47,6 +47,10 @@ impl InputStamper {
         let input_capture =
             timer_channel.into_input_capture(timers::tim5::CaptureSource4::TI4);
 
+        // FIXME: hack in de-glitching filter
+        let regs = unsafe { &*hal::stm32::TIM5::ptr() };
+        regs.ccmr2_input().modify(|_, w| w.ic4f().bits(0b0011));
+
         Self {
             capture_channel: input_capture,
             _di0_trigger: trigger,