5 files changed, 146 insertions, 9 deletions

diff --git a/MCP23017/MCP23017.ino b/MCP23017/MCP23017.ino
new file mode 100644
index 0000000..30c75bc
--- /dev/null
+++ b/MCP23017/MCP23017.ino
@@ -0,0 +1,45 @@
+//https://tronixstuff.com/2011/08/26/arduino-mcp23017-tutorial/
+//https://www.circuitbasics.com/how-to-use-an-mpc23017-port-expander-on-the-arduino/
+//https://ww1.microchip.com/downloads/en/devicedoc/20001952c.pdf
+
+
+
+#include <Wire.h> 
+byte BbyteVal=0;
+byte AbyteVal=0;
+byte chipAddr = 0x20;
+byte GPIOA = 0x12; // PortA reg addr
+byte GPIOB = 0x13; // PortB reg addr
+byte IODIRA = 0x00; // PortA direction reg addr
+byte IODIRB = 0x01; // PortB direction reg addr
+
+void setup(){
+  Serial.begin(9600);
+  Wire.begin();
+  
+  Wire.beginTransmission(chipAddr);
+  Wire.write(IODIRA); // IODIRA dir register
+  Wire.write(0xff); // set entire PORT A  as output
+  Wire.endTransmission();
+
+  Wire.beginTransmission(chipAddr);
+  Wire.write(IODIRB); // IODIRB dir register
+  Wire.write(0xff); // set entire PORT B as input
+  Wire.endTransmission();
+  }
+
+void loop(){    
+  Wire.beginTransmission(chipAddr);
+  Wire.write(GPIOB);  // read the inputs off PORT B
+  Wire.requestFrom(chipAddr, 1); // ask for 1 byte
+  BbyteVal = Wire.read(); // read it
+  Wire.endTransmission();
+  Serial.println(BbyteVal);
+
+  Wire.beginTransmission(chipAddr);
+  Wire.write(GPIOB);  // read the inputs off PORT B
+  Wire.requestFrom(chipAddr, 1); // ask for 1 byte
+  AbyteVal = Wire.read(); // read it
+  Wire.endTransmission();
+  Serial.println(AbyteVal);
+}
diff --git a/MCP23017/mcp20317_schemss.jpg b/MCP23017/mcp20317_schemss.jpg
new file mode 100644
index 0000000..5231394
--- /dev/null
+++ b/MCP23017/mcp20317_schemss.jpg
diff --git a/MCP23017/with_lib/with_lib.ino b/MCP23017/with_lib/with_lib.ino
new file mode 100644
index 0000000..98d36b8
--- /dev/null
+++ b/MCP23017/with_lib/with_lib.ino
@@ -0,0 +1,26 @@
+/** Inputs.ino
+ * Sets port 7 on bank B to INPUT_PULLUP and copies its
+ * state to the built-in LED on the board
+ * https://github.com/ndomx/MCP23017-Arduino-Library
+ */
+
+#include <mcp23017.h>
+
+#define MCP_ADDR (0)
+
+MCP23017 mcp(MCP_ADDR);
+
+void setup(void){
+    Serial.begin(9600);
+    pinMode(LED_BUILTIN, OUTPUT);
+
+    mcp.start();
+    mcp.pinMode(GPB7, INPUT_PULLUP);
+}
+
+void loop(void){
+    byte mcp_input = mcp.digitalRead(GPB7);
+    digitalWrite(LED_BUILTIN, mcp_input);
+    Serial.println(mcp_input);
+    delay(500);
+}
diff --git a/pcb_boven/pcb_boven.sch b/pcb_boven/pcb_boven.sch
index a5d5ec3..c537fa1 100644
--- a/pcb_boven/pcb_boven.sch
+++ b/pcb_boven/pcb_boven.sch
@@ -854,16 +854,12 @@ Wire Wire Line
 	7425 6175 7425 7400
 Connection ~ 7425 7400
 Wire Wire Line
-	7425 7400 8075 7400
-Wire Wire Line
 	7350 7300 7350 6250
 Wire Wire Line
 	7350 6250 6950 6250
 Wire Wire Line
 	6950 6250 6950 5250
 Connection ~ 7350 7300
-Wire Wire Line
-	7350 7300 8100 7300
 Text GLabel 1300 10175 0    50   Input ~ 0
 A
 Text GLabel 1300 10075 0    50   Input ~ 0
@@ -881,8 +877,6 @@ Wire Wire Line
 Wire Wire Line
 	8125 6700 8350 6700
 Wire Wire Line
-	8625 6700 8625 6975
-Wire Wire Line
 	8625 6975 10025 6975
 Connection ~ 8125 6700
 Wire Wire Line
@@ -931,4 +925,44 @@ Wire Wire Line
 	8475 8600 8475 5325
 Wire Wire Line
 	8475 5325 8750 5325
+Wire Wire Line
+	7350 7300 8100 7300
+Wire Wire Line
+	8625 5525 8625 6700
+Connection ~ 8625 6700
+Wire Wire Line
+	8625 6700 8625 6975
+Connection ~ 8625 6975
+Wire Wire Line
+	8625 6975 8625 7300
+Connection ~ 8100 7300
+Wire Wire Line
+	8100 7300 8625 7300
+Wire Wire Line
+	8650 5625 8650 7400
+Wire Wire Line
+	7425 7400 8075 7400
+Connection ~ 8075 7400
+Wire Wire Line
+	8075 7400 8650 7400
+Wire Wire Line
+	8750 5525 8625 5525
+Wire Wire Line
+	8625 5525 5000 5525
+Wire Wire Line
+	5000 5525 5000 6700
+Wire Wire Line
+	5000 6700 5025 6700
+Connection ~ 8625 5525
+Wire Wire Line
+	5025 6800 5025 6750
+Wire Wire Line
+	5025 6750 5050 6750
+Wire Wire Line
+	5050 6750 5050 5625
+Wire Wire Line
+	5050 5625 8650 5625
+Connection ~ 8650 5625
+Wire Wire Line
+	8650 5625 8750 5625
 $EndSCHEMATC
diff --git a/pcb_boven/pcb_boven.sch-bak b/pcb_boven/pcb_boven.sch-bak
index 874e36b..a5d5ec3 100644
--- a/pcb_boven/pcb_boven.sch-bak
+++ b/pcb_boven/pcb_boven.sch-bak
@@ -869,11 +869,9 @@ A
 Text GLabel 1300 10075 0    50   Input ~ 0
 B
 Wire Wire Line
-	4800 7700 5025 7700
-Wire Wire Line
 	950  10175 4800 10175
 Wire Wire Line
-	4800 10175 4800 7700
+	4800 10175 4800 8100
 Wire Wire Line
 	5025 7600 4775 7600
 Wire Wire Line
@@ -899,4 +897,38 @@ Wire Wire Line
 	8200 5825 8700 5825
 Connection ~ 8200 2375
 Connection ~ 8700 5825
+Wire Wire Line
+	8750 5425 4975 5425
+Wire Wire Line
+	4975 5425 4975 7700
+Wire Wire Line
+	4975 7700 5025 7700
+Wire Wire Line
+	5025 8100 4800 8100
+Wire Wire Line
+	5025 7800 4950 7800
+Wire Wire Line
+	4950 7800 4950 5300
+Wire Wire Line
+	4950 5300 8275 5300
+Wire Wire Line
+	8275 5300 8275 5125
+Wire Wire Line
+	8275 5125 8750 5125
+Wire Wire Line
+	8750 5225 8325 5225
+Wire Wire Line
+	8325 5225 8325 5350
+Wire Wire Line
+	8325 5350 4925 5350
+Wire Wire Line
+	4925 5350 4925 7900
+Wire Wire Line
+	4925 7900 5025 7900
+Wire Wire Line
+	7225 8600 8475 8600
+Wire Wire Line
+	8475 8600 8475 5325
+Wire Wire Line
+	8475 5325 8750 5325
 $EndSCHEMATC