76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2015 Karl Palsson <karlp@tweak.net.au>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* "generic" could be any L1 board, but this file is pre-configured for the
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* libopencm3-tests "hw1" board, with an stm32l151c8-A part.
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*/
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#include <libopencm3/cm3/nvic.h>
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#include <libopencm3/stm32/gpio.h>
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#include <libopencm3/stm32/flash.h>
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#include <libopencm3/stm32/rcc.h>
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#include <libopencm3/stm32/syscfg.h>
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#include <stdio.h>
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#include "usb-gadget0.h"
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#define ER_DEBUG
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#ifdef ER_DEBUG
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#define ER_DPRINTF(fmt, ...) \
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do { printf(fmt, ## __VA_ARGS__); } while (0)
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#else
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#define ER_DPRINTF(fmt, ...) \
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do { } while (0)
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#endif
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int main(void)
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{
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rcc_periph_clock_enable(RCC_GPIOE);
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gpio_mode_setup(GPIOE, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO11|GPIO12);
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gpio_set(GPIOE, GPIO12);
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rcc_clock_setup_pll(&rcc_hse8mhz_configs[RCC_CLOCK_HSE8_72MHZ]);
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rcc_periph_clock_enable(RCC_GPIOA);
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/*
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* Vile hack to reenumerate, physically _drag_ d+ low.
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* do NOT do this if you're board has proper usb pull up control!
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* (need at least 2.5us to trigger usb disconnect)
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*/
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gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO12);
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gpio_clear(GPIOA, GPIO12);
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for (unsigned int i = 0; i < 800000; i++) {
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__asm__("nop");
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}
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/* now return PA11/PA12 to usb AF */
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gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO11|GPIO12);
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gpio_set_af(GPIOA, GPIO_AF14, GPIO11|GPIO12);
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usbd_device *usbd_dev = gadget0_init(&st_usbfs_v1_usb_driver,
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"stm32f3-disco");
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ER_DPRINTF("bootup complete\n");
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gpio_clear(GPIOE, GPIO12);
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static int i = 0;
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while (1) {
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gadget0_run(usbd_dev);
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}
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}
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