From 11b84afca0ee574c7053e548eee3b824a335876d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mario=20H=C3=BCttel?= <mario.huettel@gmx.net>
Date: Sun, 15 Nov 2020 23:10:19 +0100
Subject: [PATCH] Issue #21: Change calibration apply function

---
 stm-firmware/.gitignore | 1 +
 stm-firmware/adc-meas.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/stm-firmware/.gitignore b/stm-firmware/.gitignore
index cfdd888..1e70134 100644
--- a/stm-firmware/.gitignore
+++ b/stm-firmware/.gitignore
@@ -14,3 +14,4 @@ reflow-controller.includes
 *.includes
 *.config
 *.files
+*.user.*
diff --git a/stm-firmware/adc-meas.c b/stm-firmware/adc-meas.c
index 4a9f0e3..816b993 100644
--- a/stm-firmware/adc-meas.c
+++ b/stm-firmware/adc-meas.c
@@ -216,7 +216,7 @@ void adc_pt1000_get_resistance_calibration(float *offset, float *sensitivity_dev
 static inline float adc_pt1000_apply_calibration(float raw_resistance)
 {
 	if (calibration_active)
-		return pt1000_res_raw_lf * (1.0f + pt1000_sens_dev) + pt1000_offset;
+        return (raw_resistance - pt1000_offset) * (1.0f + pt1000_sens_dev);
 	else
 		return raw_resistance;