From bfca55083a48512c6ef194a23fffdb52d167cbd2 Mon Sep 17 00:00:00 2001
From: mrv96 <mrv96@users.noreply.github.com>
Date: Wed, 8 Jan 2020 18:59:24 +0100
Subject: [PATCH 1/3] Change CheapStepper::seq (byte seqNum)

Changed CheapStepper::seq (byte seqNum) to compact the code and save memory.
---
 CheapStepper.cpp | 81 +++---------------------------------------------
 1 file changed, 4 insertions(+), 77 deletions(-)

diff --git a/CheapStepper.cpp b/CheapStepper.cpp
index 914cd91..5af55c3 100644
--- a/CheapStepper.cpp
+++ b/CheapStepper.cpp
@@ -209,89 +209,16 @@ void CheapStepper::seqCCW (){
 	}
 }
 
-void CheapStepper::seq (int seqNum){
+void CheapStepper::seq (byte seqNum){
 
-	int pattern[4];
 	// A,B,C,D HIGH/LOW pattern to write to driver board
+	byte pattern[] = {0b1000, 0b1100, 0b0100, 0b0110, 0b0010, 0b0011, 0b0001, 0b1001, 0b0000};
 	
-	switch(seqNum){
-		case 0:
-		{
-			pattern[0] = 1;
-			pattern[1] = 0;
-			pattern[2] = 0;
-			pattern[3] = 0;
-			break;
-		}
-		case 1:
-		{
-			pattern[0] = 1;
-			pattern[1] = 1;
-			pattern[2] = 0;
-			pattern[3] = 0;
-			break;
-		}
-		case 2:
-		{
-			pattern[0] = 0;
-			pattern[1] = 1;
-			pattern[2] = 0;
-			pattern[3] = 0;
-			break;
-		}
-		case 3:
-		{
-			pattern[0] = 0;
-			pattern[1] = 1;
-			pattern[2] = 1;
-			pattern[3] = 0;
-			break;
-		}	
-		case 4:
-		{
-			pattern[0] = 0;
-			pattern[1] = 0;
-			pattern[2] = 1;
-			pattern[3] = 0;
-			break;
-		}
-		case 5:
-		{
-			pattern[0] = 0;
-			pattern[1] = 0;
-			pattern[2] = 1;
-			pattern[3] = 1;
-			break;
-		}
-		case 6:
-		{
-			pattern[0] = 0;
-			pattern[1] = 0;
-			pattern[2] = 0;
-			pattern[3] = 1;
-			break;
-		}
-		case 7:
-		{
-			pattern[0] = 1;
-			pattern[1] = 0;
-			pattern[2] = 0;
-			pattern[3] = 1;
-			break;
-		}
-		default:
-		{
-			pattern[0] = 0;
-			pattern[1] = 0;
-			pattern[2] = 0;
-			pattern[3] = 0;
-			break;
-		}
-	}
+	if(seqNum < 0 || seqNum > 8) seqNum = 8;
 
 	// write pattern to pins
 	for (int p=0; p<4; p++){
-		digitalWrite(pins[p], pattern[p]);
+		digitalWrite(pins[p], (pattern & (1 << 3-p)) >> 3-p);
 	}
 	delayMicroseconds(delay);
 }

From f2b1891c90719e49b91135ab13cd29c2e0715d76 Mon Sep 17 00:00:00 2001
From: mrv96 <mrv96@users.noreply.github.com>
Date: Wed, 8 Jan 2020 19:02:49 +0100
Subject: [PATCH 2/3] Saved memory

Updated seqN declaration and seq(seqNum) prototype to save memory.
---
 CheapStepper.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CheapStepper.h b/CheapStepper.h
index eb29df7..890c379 100644
--- a/CheapStepper.h
+++ b/CheapStepper.h
@@ -105,7 +105,7 @@ class CheapStepper
 
 	void seqCW();
 	void seqCCW();
-	void seq(int seqNum); // send specific sequence num to driver
+	void seq(byte seqNum); // send specific sequence num to driver
 
 	int pins[4]; // defaults to pins {8,9,10,11} (in1,in2,in3,in4 on the driver board)
 
@@ -118,7 +118,7 @@ class CheapStepper
 	// low speed (high torque) = 1465 ~= 1 rpm
 	// high speed (low torque) = 600 ~=  24 rpm
 
-	int seqN = -1; // keeps track of sequence number
+	byte seqN = -1; // keeps track of sequence number
 
 	// variables for non-blocking moves:
 	unsigned long lastStepTime; // time in microseconds that last step happened

From 21bd836139d3eadfbf91358da594a05654edf8b1 Mon Sep 17 00:00:00 2001
From: mrv96 <mrv96@users.noreply.github.com>
Date: Wed, 8 Jan 2020 19:37:52 +0100
Subject: [PATCH 3/3] Updated seq method

Update seq method to save memory
---
 CheapStepper.cpp | 54 +++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 49 insertions(+), 5 deletions(-)

diff --git a/CheapStepper.cpp b/CheapStepper.cpp
index 5af55c3..22b4bac 100644
--- a/CheapStepper.cpp
+++ b/CheapStepper.cpp
@@ -211,10 +211,56 @@ void CheapStepper::seqCCW (){
 
 void CheapStepper::seq (byte seqNum){
 
+	byte pattern;
 	// A,B,C,D HIGH/LOW pattern to write to driver board
-	byte pattern[] = {0b1000, 0b1100, 0b0100, 0b0110, 0b0010, 0b0011, 0b0001, 0b1001, 0b0000};
-	
-	if(seqNum < 0 || seqNum > 8) seqNum = 8;
+
+	switch (seqNum) {
+		case 0:
+		{
+			pattern = 0b1000;
+			break;
+		}
+		case 1:
+		{
+			pattern = 0b1100;
+			break;
+		}
+		case 2:
+		{
+			pattern = 0b0100;
+			break;
+		}
+		case 3:
+		{
+			pattern = 0b0110;
+			break;
+		}
+		case 4:
+		{
+			pattern = 0b0010;
+			break;
+		}
+		case 5:
+		{
+			pattern = 0b0011;
+			break;
+		}
+		case 6:
+		{
+			pattern = 0b0001;
+			break;
+		}
+		case 7:
+		{
+			pattern = 0b1001;
+			break;
+		}
+		default:
+		{
+			pattern = 0b000;
+			break;
+		}
+	}
 
 	// write pattern to pins
 	for (int p=0; p<4; p++){
@@ -222,5 +268,3 @@ void CheapStepper::seq (byte seqNum){
 	}
 	delayMicroseconds(delay);
 }
-
-