Revert "Merge pull request #20 from felmue/fm-fix-setbuspowermode-2"

This reverts commit 08ec82a, reversing
changes made to adbdc80.

Author: fm

src/AXP192.cpp

@@ -527,32 +527,31 @@ void AXP192::SetLCDRSet(bool state)
     Write1Byte(reg_addr, data);
 }
 
-// Select source for BUS_5V
-// 0 : use internal boost
-// 1 : powered externally
 void AXP192::SetBusPowerMode(uint8_t state)
 {
     uint8_t data;
     if (state == 0)
     {
-        // Set GPIO to 3.3V (LDO OUTPUT mode)
         data = Read8bit(0x91);
-        Write1Byte(0x91, (data & 0x0F) | 0xF0);
-        // Set GPIO0 to LDO OUTPUT, pullup N_VBUSEN to disable VBUS supply from BUS_5V
+        Write1Byte(0x91, (data & 0X0F) | 0XF0);
+
         data = Read8bit(0x90);
-        Write1Byte(0x90, (data & 0xF8) | 0x02);
-        // Set EXTEN to enable 5v boost
-        data = Read8bit(0x10);
-        Write1Byte(0x10, data | 0x04);
+        Write1Byte(0x90, (data & 0XF8) | 0X02); //set GPIO0 to LDO OUTPUT , pullup N_VBUSEN to disable supply from BUS_5V
+
+        data = Read8bit(0x91);
+
+        data = Read8bit(0x12);         //read reg 0x12
+        Write1Byte(0x12, data | 0x40); //set EXTEN to enable 5v boost
     }
     else
     {
-        // Set EXTEN to disable 5v boost
-        data = Read8bit(0x10);
-        Write1Byte(0x10, data & ~0x04);
-        // Set GPIO0 to float, using enternal pulldown resistor to enable VBUS supply from BUS_5V
+        data = Read8bit(0x12);         //read reg 0x10
+        Write1Byte(0x12, data & 0XBF); //set EXTEN to disable 5v boost
+
+        //delay(2000);
+
         data = Read8bit(0x90);
-        Write1Byte(0x90, (data & 0xF8) | 0x07);
+        Write1Byte(0x90, (data & 0xF8) | 0X01); //set GPIO0 to float , using enternal pulldown resistor to enable supply from BUS_5VS
     }
 }