Left-right IO util script

left-right-io/scape_all_addr-tcaa/scape_all_addr-tcaa.ino

@@ -0,0 +1,58 @@
+#include "Wire.h" // enable I2C bus
+#include <PCA9554.h>  // Load the PCA9554 Library
+
+byte saa1064 = 0x3B; // define the I2C bus address for our SAA1064 (pin 1 to GND) ****
+#define TCAADDR 0x70
+PCA9554 ioCon1(0x24);  // Create an object at this address
+
+uint8_t mapIO = 0b10000000;
+
+void shiftL() {
+  mapIO = (mapIO << 1) | ((mapIO & 0x80) >> 7);
+}
+
+void _write() {
+  for (int i = 0; i < 8; ++i) {
+    ioCon1.digitalWrite(i, (mapIO & (1 << i)) ? 0 : 1);
+  }
+}
+
+void write() {
+  Serial.println("writing to PCA9554 device");
+
+  selectLeft();
+  _write();
+  delay(1);
+
+  selectRight();
+  _write();
+}
+
+void tcaselect(uint8_t i) {
+  if (i > 7) return;
+ 
+  Wire.beginTransmission(TCAADDR);
+  Wire.write(1 << i);
+  Wire.endTransmission();  
+}
+
+void selectLeft() { tcaselect(2); }
+void selectRight() { tcaselect(1); }
+
+void setup()
+{
+  Serial.begin(9600);
+  Serial.println("Setup");
+
+  Wire.begin();
+  ioCon1.portMode(ALLOUTPUT);
+  delay(500);
+}
+
+
+void loop() 
+{
+  write();
+  shiftL();
+  delay(300);
+}