First commit with SRs 165N and 595N functionality

src/165.cpp

@@ -0,0 +1,35 @@
+#include "Arduino.h"
+#include <stdint.h>
+#include "165.h"
+
+SR165 NewSR165(uint8_t pl, uint8_t ce, uint8_t cp, uint8_t q7) {
+  SR165 newSr = {
+    .parallelLoadIn = pl,
+    .clockEnable = ce,
+    .complementaryOut = q7,
+    .clockIn = cp
+  };
+
+  pinMode(newSr.clockIn, OUTPUT);
+  pinMode(newSr.clockEnable, OUTPUT);
+  pinMode(newSr.parallelLoadIn, OUTPUT);
+  pinMode(newSr.complementaryOut, INPUT);
+
+  return newSr;
+}
+
+byte SR165_read(SR165 *sr) {
+  // Write pulse to load pin
+  digitalWrite(sr->parallelLoadIn, LOW);
+  delayMicroseconds(5);
+  digitalWrite(sr->parallelLoadIn, HIGH);
+  delayMicroseconds(5);
+ 
+  // Get data from 74HC165
+  digitalWrite(sr->clockIn, HIGH);
+  digitalWrite(sr->clockEnable, LOW);
+  byte incoming = shiftIn(sr->complementaryOut, sr->clockIn, LSBFIRST);
+  digitalWrite(sr->clockEnable, HIGH);
+
+  return incoming;
+}

src/165.h

@@ -0,0 +1,17 @@
+#ifndef __165__
+#define __165__
+
+#include "Arduino.h"
+#include <stdint.h>
+
+typedef struct SR165 {
+  uint8_t parallelLoadIn;
+  uint8_t clockEnable;
+  uint8_t complementaryOut;
+  uint8_t clockIn;
+} SR165;
+
+SR165 NewSR165(uint8_t pl, uint8_t ce, uint8_t cp, uint8_t q7);
+byte SR165_read(SR165 *sr);
+
+#endif

src/595n.cpp

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+#include "Arduino.h"
+#include "595n.h"
+
+SR595N NewSR595N(uint8_t ser, uint8_t rclk, uint8_t srclk) {
+  struct SR595N newSR = {
+    .ser = ser,
+    .rclk = rclk,
+    .srclk = srclk
+  };
+
+  pinMode(newSR.ser, OUTPUT);
+  pinMode(newSR.rclk, OUTPUT);
+  pinMode(newSR.srclk, OUTPUT);
+
+  return newSR;
+}
+
+void SR595N_write(SR595N *sr, uint8_t value) {
+  digitalWrite(sr->rclk, LOW);
+  shiftOut(sr->ser, sr->srclk, MSBFIRST, value);
+  digitalWrite(sr->rclk, HIGH);
+}

src/595n.h

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+#ifndef __595N__
+#define __595N__
+
+#include <stdint.h>
+
+typedef struct SR595N {
+  uint8_t ser;
+  uint8_t rclk;
+  uint8_t srclk;
+} SR595N;
+
+SR595N NewSR595N(uint8_t ser, uint8_t rclkh, uint8_t srclk);
+void SR595N_write(SR595N *sr, uint8_t value);
+
+#endif

src/main.cpp

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+/* BtnBOX by Eduardo Silva
+ * Notes:
+ * calling Wire.begin() will take use of the pins 2 and 3. Maybe try not using
+ * them from the getgo
+ */
+
+#include <Arduino.h>
+#include "595n.h"
+#include "165.h"
+// #include "Wire.h"
+
+// NOTES - 595N
+// On the board, the first output pin on the SR595 is Qb
+// Which means that our outputs go from 0b00000010 to 0b01111110
+#define IN_SERIAL_PIN 4 // SER   - pin14 (Serial Pin)
+#define IN_LATCH_PIN  5 // RCLK  - pin12 (Latch Pin)
+#define IN_CLOCK_PIN  6 // SRCLK - pin11 (Clock Pin)
+/*                      
++--             --+
+|P5 P4 P3 P2 P1 P0|
++-----------------+
+P0 0b00000010
+P1
+*/
+
+// NOTES - 165
+#define OUT_PARALLEL_LOAD_IN  10 // PL - pin1  (Async Parallel Load In)
+#define OUT_CLOCK_IN          9  // CP - pin2  (Clock In)
+#define OUT_COMPLEMENTARY_OUT 8  // Q7 - pin7  (Complementary Output)
+#define OUT_CLOCK_ENABLE      7  // CE - pin15 (Clock Enable)
+
+SR595N input = NewSR595N(IN_SERIAL_PIN, IN_LATCH_PIN, IN_CLOCK_PIN);
+SR165 output = NewSR165(OUT_PARALLEL_LOAD_IN, OUT_CLOCK_ENABLE, 
+                        OUT_CLOCK_IN, OUT_COMPLEMENTARY_OUT);
+
+void setup() {
+  Serial.begin(115200);
+
+  SR595N_write(&input, 0b10101010);
+}
+
+void loop(void) {
+  delay(200);
+
+  byte srOutput = SR165_read(&output);
+
+  Serial.println(srOutput, BIN);
+}