lora-car/libopencm3/tests/gadget-zero/main-stm32f3-disco.c
Arti Zirk 054740c5de git subrepo clone https://github.com/libopencm3/libopencm3.git
subrepo:
  subdir:   "libopencm3"
  merged:   "88e91c9a7cce"
upstream:
  origin:   "https://github.com/libopencm3/libopencm3.git"
  branch:   "master"
  commit:   "88e91c9a7cce"
git-subrepo:
  version:  "0.4.3"
  origin:   "???"
  commit:   "???"
2023-01-21 21:54:42 +02:00

76 lines
2.2 KiB
C

/*
* 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/>.
*/
/* "generic" could be any L1 board, but this file is pre-configured for the
* libopencm3-tests "hw1" board, with an stm32l151c8-A part.
*/
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/flash.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/syscfg.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_periph_clock_enable(RCC_GPIOE);
gpio_mode_setup(GPIOE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO11|GPIO12);
gpio_set(GPIOE, GPIO12);
rcc_clock_setup_pll(&rcc_hse8mhz_configs[RCC_CLOCK_HSE8_72MHZ]);
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_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO12);
gpio_clear(GPIOA, GPIO12);
for (unsigned int i = 0; i < 800000; i++) {
__asm__("nop");
}
/* now return PA11/PA12 to usb AF */
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO11|GPIO12);
gpio_set_af(GPIOA, GPIO_AF14, GPIO11|GPIO12);
usbd_device *usbd_dev = gadget0_init(&st_usbfs_v1_usb_driver,
"stm32f3-disco");
ER_DPRINTF("bootup complete\n");
gpio_clear(GPIOE, GPIO12);
static int i = 0;
while (1) {
gadget0_run(usbd_dev);
}
}