From aa2fa29b89c120ec23d64252d3f1b036c1369b00 Mon Sep 17 00:00:00 2001
From: xoviat <xoviat@users.noreply.github.com>
Date: Fri, 15 Sep 2023 17:36:21 -0500
Subject: [PATCH] stm32: fix adc f3 startup time

closes #1888.
---
 embassy-stm32/src/adc/f3.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/embassy-stm32/src/adc/f3.rs b/embassy-stm32/src/adc/f3.rs
index 2971ad527..b39d6ac8e 100644
--- a/embassy-stm32/src/adc/f3.rs
+++ b/embassy-stm32/src/adc/f3.rs
@@ -50,7 +50,7 @@ impl<'d, T: Instance> Adc<'d, T> {
         while T::regs().cr().read().adcal() {}
 
         // Wait more than 4 clock cycles after adcal is cleared (RM0364 p. 223)
-        delay.delay_us(6 * 1_000_000 / Self::freq().0);
+        delay.delay_us(1 + (6 * 1_000_000 / Self::freq().0));
 
         // Enable the adc
         T::regs().cr().modify(|w| w.set_aden(true));