From 7b1ae3bdc6512c7d0a26c6edd94b29c765db121a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mario=20H=C3=BCttel?= <mario.huettel@gmx.net>
Date: Mon, 2 Nov 2020 18:20:17 +0100
Subject: [PATCH] Improve code in calibration module

---
 stm-firmware/calibration.c | 53 +++++++++++++++++++-------------------
 1 file changed, 27 insertions(+), 26 deletions(-)

diff --git a/stm-firmware/calibration.c b/stm-firmware/calibration.c
index 1985cd7..81dd815 100644
--- a/stm-firmware/calibration.c
+++ b/stm-firmware/calibration.c
@@ -92,7 +92,7 @@ static float calculate_mean(float *values, uint32_t count)
 		} while (--loop_cnt > 0);
 	}
 
-	return sum/(float)count;
+	return sum / (float)count;
 }
 
 static float calculate_standard_deviation(float *values, uint32_t count, float mean)
@@ -103,35 +103,36 @@ static float calculate_standard_deviation(float *values, uint32_t count, float m
 	float res;
 
 	switch (remainder) {
-	case 0: do { sum += (*values - mean) * (*values - mean);
-			values++;
-			/* FALLTHRU */
-	case 7:      sum += (*values - mean) * (*values - mean);
-			values++;
-			     /* FALLTHRU */
-	case 6:      sum += (*values - mean) * (*values - mean);
-			     values++;
-			     /* FALLTHRU */
-	case 5:      sum += (*values - mean) * (*values - mean);
-			     values++;
-			     /* FALLTHRU */
-	case 4:      sum += (*values - mean) * (*values - mean);
-			     values++;
-			     /* FALLTHRU */
-	case 3:      sum += (*values - mean) * (*values - mean);
-			     values++;
-			     /* FALLTHRU */
-	case 2:      sum += (*values - mean) * (*values - mean);
-			     values++;
-			     /* FALLTHRU */
-	case 1:      sum += (*values - mean) * (*values - mean);
-			     values++;
-			     /* FALLTHRU */
+	case 0:	do {
+		sum += (*values - mean) * (*values - mean);
+		values++;
+		/* FALLTHRU */
+	case 7:	sum += (*values - mean) * (*values - mean);
+		values++;
+		/* FALLTHRU */
+	case 6: sum += (*values - mean) * (*values - mean);
+		values++;
+		/* FALLTHRU */
+	case 5:	sum += (*values - mean) * (*values - mean);
+		values++;
+		/* FALLTHRU */
+	case 4: sum += (*values - mean) * (*values - mean);
+		values++;
+		/* FALLTHRU */
+	case 3: sum += (*values - mean) * (*values - mean);
+		values++;
+		/* FALLTHRU */
+	case 2: sum += (*values - mean) * (*values - mean);
+		values++;
+		/* FALLTHRU */
+	case 1: sum += (*values - mean) * (*values - mean);
+		values++;
+		/* FALLTHRU */
 		} while (--loop_cnt > 0);
 	}
 
 	sum /= (float)count;
-	/* Compute the square roor using the FPU.
+	/* Compute the square root using the FPU.
 	 * The constraint 't' tells GCC to use a floating point register
 	 */
 	__asm__ __volatile__("vsqrt.f32 %0, %1" : "=t"(res) : "t"(sum));