variant.cpp

#include "Arduino.h"

void usbHostPower(UsbHostPower_t mode){
	static UsbHostPower_t m = USB_HOST_POWER_OFF;
	if(m == mode){
		return;
	}
	if(mode == USB_HOST_POWER_OFF){
		digitalWrite(LIMIT_EN, LOW);
		if(m == USB_HOST_POWER_VBUS){
			digitalWrite(DEV_VBUS_EN, LOW);
		} else if(m == USB_HOST_POWER_BAT){
			digitalWrite(BOOST_EN, LOW);
		}
	} else if(mode == USB_HOST_POWER_VBUS){
		if(m == USB_HOST_POWER_BAT){
			digitalWrite(BOOST_EN, LOW);
		}
		digitalWrite(DEV_VBUS_EN, HIGH);
	} else if(mode == USB_HOST_POWER_BAT){
		if(m == USB_HOST_POWER_VBUS){
			digitalWrite(DEV_VBUS_EN, LOW);
		}
		digitalWrite(BOOST_EN, HIGH);
	}
	if(mode != USB_HOST_POWER_OFF){
		digitalWrite(LIMIT_EN, HIGH);
	}
	m = mode;
}

void usbHostEnable(bool enable){
	digitalWrite(USB_HOST_EN, enable);
}

extern "C" void initVariant(void){
	// Route USB to Device Side
	pinMode(BOOST_EN,    OUTPUT); digitalWrite(BOOST_EN,    LOW);
	pinMode(LIMIT_EN,    OUTPUT); digitalWrite(LIMIT_EN,    LOW);
	pinMode(DEV_VBUS_EN, OUTPUT); digitalWrite(DEV_VBUS_EN, LOW);
	pinMode(USB_HOST_EN, OUTPUT); digitalWrite(USB_HOST_EN, LOW);

	// Turn Off LCD
	pinMode(LCD_RST, OUTPUT); digitalWrite(LCD_RST, LOW);
	pinMode(LCD_BL,  OUTPUT); digitalWrite(LCD_BL,  LOW);
}