usb_setup.cpp

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/**
 * @file wirish/stm32f1/boards_setup.cpp
 * @author Marti Bolivar <mbolivar@leaflabs.com>
 * @brief STM32F1 chip setup.
 *
 * This file controls how init() behaves on the STM32F1. Be very
 * careful when changing anything here. Many of these values depend
 * upon each other.
 */

#include "boards_private.h"
#include <libmaple/gpio.h>
#include <libmaple/timer.h>

#include <boards.h>

namespace wirish {
    namespace priv {

        void board_setup_usb(void) {
#ifdef GENERIC_BOOTLOADER			
			//Reset the USB interface on generic boards - developed by Victor PV
			gpio_set_mode(PIN_MAP[PA12].gpio_device, PIN_MAP[PA12].gpio_bit, GPIO_OUTPUT_PP);
			gpio_write_bit(PIN_MAP[PA12].gpio_device, PIN_MAP[PA12].gpio_bit,0);
			
			for(volatile unsigned int i=0;i<512;i++);// Only small delay seems to be needed, and USB pins will get configured in Serial.begin
			gpio_set_mode(PIN_MAP[PA12].gpio_device, PIN_MAP[PA12].gpio_bit, GPIO_INPUT_FLOATING);
#endif			
		}

    }
}