Diff: main.cpp

Revision:

0:1b50d5674f92

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue May 01 16:36:27 2018 +0000
@@ -0,0 +1,130 @@
+#include "mbed.h"
+#include "MAX32620FTHR.h"
+#include "MAX77650.h"
+
+// Configure GPIO voltage
+MAX32620FTHR max32620fthr(MAX32620FTHR::VIO_3V3);
+
+// LEDs connected to MAX32620
+DigitalOut redLed(LED_RED, LED_OFF);
+DigitalOut grnLed(LED_GREEN, LED_OFF);
+DigitalOut bluLed(LED_BLUE, LED_OFF);
+
+// I2C master 2
+I2C i2c2(I2C2_SDA, I2C2_SCL);
+
+// MAX77650 PMIC and Charger
+MAX77650 max77650(i2c2);
+
+// MAX77650 IRQ
+InterruptIn max77650IntIn(P2_3);
+
+// Configure PMIC LEDs to rotate colors
+static const char ledRotate[] = {
+    MAX77650::CNFG_LED0_A,
+    0x44, 0x44, 0x44,
+    0x17, 0x37, 0x77,
+    0x01,
+};
+
+// Configure PMIC to drive green LED
+static const char ledGreen[] = {
+    MAX77650::CNFG_LED0_A,
+    0x04, 0x44, 0x04,
+    0x0F, 0x0F, 0x0F,
+    0x01,
+};
+
+// Disable LED's connected to PMIC
+static const char ledNone[] = {
+    MAX77650::CNFG_LED0_A,
+    0x04, 0x04, 0x04,
+    0x0F, 0x0F, 0x0F,
+    0x01,
+};
+
+// Cycle through PMIC LED's with every button push
+void max77650IrqHandler(void)
+{
+    char irqStatus;
+    static char ledPhase = 0;
+    static char ledData[] = {
+        MAX77650::CNFG_LED0_A,
+        0x44, 0x04, 0x04,
+        0x0F, 0x0F, 0x0F,
+        0x01,
+    };
+
+    while (!(max77650.readReg(MAX77650::INT_GLBL, &irqStatus))) {
+        if (irqStatus) {
+            if (irqStatus & 0x04) {
+                ledPhase++;
+                switch (ledPhase % 4) {
+                    case 0: ledData[1] ^= 0x40; break;
+                    case 1: ledData[1] ^= 0x40; ledData[2] ^= 0x40; break;
+                    case 2: ledData[2] ^= 0x40; ledData[3] ^= 0x40; break;
+                    case 3: ledData[3] ^= 0x40; break;
+                }
+                if (!(max77650.writeReg(ledData, sizeof(ledData)))) {
+                    break;
+                }
+            }
+        } else {
+            break;
+        }
+    }
+}
+
+// MAX77650 IRQ configuration
+void max77650IrqInit(void)
+{
+    // Configure MAX77650 to generate an interrupt request when push buton SW2 is pressed
+    max77650.writeReg(MAX77650::CNFG_GLBL, MAX77650::SBIA_LPM | MAX77650::DBEN_30_MS);
+    max77650.writeReg(MAX77650::INTM_GLBL, MAX77650::NEN_FALL);
+
+    // Manually invoke the MAX77650 interrupt handler to service any pending interrupts
+    max77650IrqHandler();
+
+    // Configure InterruptIn object to service MAX77650 IRQ signal
+    max77650IntIn.mode(PullUp);
+    max77650IntIn.fall(max77650IrqHandler);
+    max77650IntIn.enable_irq();
+}
+
+int main()
+{
+    int state = 0;
+
+    // Turn off Low-Dropout Linear Regulator (LDO); unused on MAX32620FTHR platform
+    max77650.disableLDO();
+    
+    // Set SIMO Buck-Boost Regulator 2 target voltage; provides VDDIOH
+    max77650.setSBB2Voltage(3.3f);
+
+    // Turn PMIC green LED on, red and blue off
+    max77650.writeReg(ledGreen, sizeof(ledGreen));
+
+    Thread::wait(3000);
+
+    // Configure PMIC LED's to cycle between colors
+    max77650.writeReg(ledRotate, sizeof(ledRotate));
+
+    Thread::wait(3000);
+
+    // Turn off PMIC LED's
+    max77650.writeReg(ledNone, sizeof(ledNone));
+
+    // Enable PMIC push button interrupt
+    max77650IrqInit();
+    
+    // Cycle MAX32620FTHR LED's
+    for (;;) {
+        Thread::wait(500);
+        switch (state++ & 0x3) {
+            case 0: redLed = LED_ON; break;
+            case 1: redLed = LED_OFF; grnLed = LED_ON; break;
+            case 2: grnLed = LED_OFF; bluLed = LED_ON; break;
+            case 3: bluLed = LED_OFF; break;
+        }
+    }
+}