add unit dac2 example

Author: Gitshaoxiang

examples/Unit/DAC2_GP8413/DAC2_GP8413.ino

@@ -0,0 +1,90 @@
+/**
+ * @file DAC2_GP8413.ino
+ * @author SeanKwok ([email protected])
+ * @brief Basic Unit DAC2 Test
+ * @version 0.1
+ * @date 2024-01-09
+ *
+ *
+ * @Hardwares: Basic + Unit DAC2(GP8413)
+ * @Platform Version: Arduino M5Stack Board Manager v2.0.9
+ * @Dependent Library:
+ * M5GFX: https://github.com/m5stack/M5GFX
+ * M5Unified: https://github.com/m5stack/M5Unified
+ * DFRobot_GP8XXX: https://github.com/DFRobot/DFRobot_GP8XXX
+ */
+
+#include <M5GFX.h>
+#include <M5Unified.h>
+#include <DFRobot_GP8XXX.h>
+
+DFRobot_GP8XXX_IIC GP8413(RESOLUTION_15_BIT, 0x59, &Wire);
+
+// range is 0~10000mv
+void setDacVoltage(uint16_t vol, uint8_t ch) {
+    uint16_t setting_vol = 0;
+    if (vol > 10000) {
+        vol = 10000;
+    }
+    if (ch > 1) ch = 1;
+    setting_vol = (int16_t)((float)vol / 10000.0f * 32767.0f);
+    if (setting_vol > 32767) {
+        setting_vol = 32767;
+    }
+    GP8413.setDACOutVoltage(setting_vol, ch);
+}
+
+void AllOutputCtl(uint16_t vol) {
+    M5.Display.fillRect(0, 0, M5.Display.width(), 30, vol > 0 ? GREEN : ORANGE);
+    M5.Display.drawString("OUTPUT " + String(vol) + "mv",
+                          M5.Display.width() / 2, 0);
+    // set channel0
+    setDacVoltage(vol, 0);
+    // set channel1
+    setDacVoltage(vol, 1);
+}
+
+void setup(void) {
+    auto cfg = M5.config();
+
+    M5.begin(cfg);
+    M5.Display.setRotation(1);
+    M5.Display.setTextDatum(top_center);
+    M5.Display.setTextColor(WHITE);
+    M5.Display.setFont(&fonts::FreeSansBoldOblique12pt7b);
+    M5.Display.setTextSize(1);
+    M5.Display.drawString("DAC2", M5.Display.width() / 2,
+                          M5.Display.height() / 2 - 20);
+    Wire.end();
+    Wire.begin(21, 22);
+
+    while (GP8413.begin() != 0) {
+        Serial.println("Init Fail!");
+        M5.Display.drawString("Init Fail!", M5.Display.width() / 2,
+                              M5.Display.height() / 2);
+        delay(1000);
+    }
+    M5.Display.clear();
+    M5.Display.drawString("DAC2", M5.Display.width() / 2,
+                          M5.Display.height() / 2 - 20);
+    GP8413.setDACOutRange(GP8413.eOutputRange10V);
+    M5.Display.drawString("BtnA En/Dis Output", M5.Display.width() / 2,
+                          M5.Display.height() / 2 + 20);
+
+    AllOutputCtl(0);
+}
+
+bool output = false;
+
+void loop(void) {
+    M5.update();
+    if (M5.BtnA.wasClicked()) {
+        output = !output;
+        if (output) {
+            AllOutputCtl(3300);
+            // AllOutputCtl(10000);
+        } else {
+            AllOutputCtl(0);
+        }
+    }
+}