From a3c1b18b0279065470939b823d11dc777b257dc1 Mon Sep 17 00:00:00 2001
From: Ivan Li <ivanli2048@gmail.com>
Date: Tue, 7 Jan 2025 21:28:55 +0800
Subject: [PATCH] feat: calibrating Differential ADC for G4

Signed-off-by: Ivan Li <ivanli2048@gmail.com>
---
 embassy-stm32/src/adc/g4.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/embassy-stm32/src/adc/g4.rs b/embassy-stm32/src/adc/g4.rs
index 555a91d17..0291ef4de 100644
--- a/embassy-stm32/src/adc/g4.rs
+++ b/embassy-stm32/src/adc/g4.rs
@@ -191,6 +191,14 @@ impl<'d, T: Instance> Adc<'d, T> {
         T::regs().cr().modify(|w| w.set_adcal(true));
 
         while T::regs().cr().read().adcal() {}
+
+        T::regs().cr().modify(|w| {
+            w.set_adcaldif(Adcaldif::DIFFERENTIAL);
+        });
+
+        T::regs().cr().modify(|w| w.set_adcal(true));
+
+        while T::regs().cr().read().adcal() {}
     }
 
     fn enable(&mut self) {