Initial commit

T-Display-S3-main/lib/PCF8575 library/examples/ledWemos/ledWemos.ino

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+/*
+ * PCF8575 GPIO Port Expand
+ * http://nopnop2002.webcrow.jp/WeMos/WeMos-25.html
+ *
+ * PCF8575    ----- WeMos
+ * A0         ----- GRD
+ * A1         ----- GRD
+ * A2         ----- GRD
+ * VSS        ----- GRD
+ * VDD        ----- 5V/3.3V
+ * SDA        ----- GPIO_4(PullUp)
+ * SCL        ----- GPIO_5(PullUp)
+ *
+ * P0     ----------------- LED0
+ * P1     ----------------- LED1
+ * P2     ----------------- LED2
+ * P3     ----------------- LED3
+ * P4     ----------------- LED4
+ * P5     ----------------- LED5
+ * P6     ----------------- LED6
+ * P7     ----------------- LED7
+ * P8     ----------------- LED8
+ * P9     ----------------- LED9
+ * P10     ----------------- LED10
+ * P11     ----------------- LED11
+ * P12     ----------------- LED12
+ * P13     ----------------- LED13
+ * P14     ----------------- LED14
+ * P15     ----------------- LED15
+ *
+ */
+
+#include "Arduino.h"
+#include "PCF8575.h"  // https://github.com/xreef/PCF8575_library
+
+// Set i2c address
+PCF8575 pcf8575(0x20);
+
+void setup()
+{
+  Serial.begin(9600);
+
+  // Set pinMode to OUTPUT
+  for(int i=0;i<16;i++) {
+    pcf8575.pinMode(i, OUTPUT);
+  }
+  pcf8575.begin();
+}
+
+void loop()
+{
+  static int pin = 0;
+  pcf8575.digitalWrite(pin, HIGH);
+  delay(1000);
+  pcf8575.digitalWrite(pin, LOW);
+  delay(1000);
+  pin++;
+  if (pin > 15) pin = 0;
+}