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/*
* This file is part of the libopencm3 project.
*
* Copyright (C) 2015 Karl Palsson <karlp@tweak.net.au>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/rcc.h>
#include <stdio.h>
#include "usb-gadget0.h"
#define ER_DEBUG
#ifdef ER_DEBUG
#define ER_DPRINTF(fmt, ...) \
do { printf(fmt, ## __VA_ARGS__); } while (0)
#else
#define ER_DPRINTF(fmt, ...) \
do { } while (0)
#endif
int main(void)
{
rcc_clock_setup_in_hse_8mhz_out_72mhz();
/* LED to indicate boot process */
rcc_periph_clock_enable(RCC_GPIOC);
gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
gpio_set(GPIOC, GPIO13);
rcc_periph_clock_enable(RCC_GPIOA);
/*
* Vile hack to reenumerate, physically _drag_ d+ low.
* do NOT do this if you're board has proper usb pull up control!
* (need at least 2.5us to trigger usb disconnect)
*/
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
gpio_clear(GPIOA, GPIO12);
for (unsigned int i = 0; i < 800000; i++) {
__asm__("nop");
}
rcc_periph_clock_enable(RCC_OTGFS);
usbd_device *usbd_dev = gadget0_init(&st_usbfs_v1_usb_driver,
"stm32f103-generic");
ER_DPRINTF("bootup complete\n");
gpio_clear(GPIOC, GPIO13);
while (1) {
gadget0_run(usbd_dev);
}
}