lora-car/libopencm3/tests/gadget-zero/main-stm32l1-generic.c

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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/>.
*/
/* "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
const struct rcc_clock_scale this_clock_config = {
/* 32MHz PLL from 16MHz HSE, 96MHz for USB on PLL VCO out */
.pll_source = RCC_CFGR_PLLSRC_HSE_CLK,
.pll_mul = RCC_CFGR_PLLMUL_MUL6,
.pll_div = RCC_CFGR_PLLDIV_DIV3,
.hpre = RCC_CFGR_HPRE_SYSCLK_NODIV,
.ppre1 = RCC_CFGR_PPRE1_HCLK_NODIV,
.ppre2 = RCC_CFGR_PPRE2_HCLK_NODIV,
.voltage_scale = PWR_SCALE1,
.flash_waitstates = 1,
.ahb_frequency = 32000000,
.apb1_frequency = 32000000,
.apb2_frequency = 32000000,
};
int main(void)
{
rcc_periph_clock_enable(RCC_GPIOB);
gpio_mode_setup(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO8|GPIO9);
gpio_set(GPIOB, GPIO8);
rcc_clock_setup_pll(&this_clock_config);
/* Enable built in USB pullup on L1 */
rcc_periph_clock_enable(RCC_SYSCFG);
SYSCFG_PMC |= SYSCFG_PMC_USB_PU;
usbd_device *usbd_dev = gadget0_init(&st_usbfs_v1_usb_driver,
"stm32l1-generic");
ER_DPRINTF("bootup complete\n");
gpio_clear(GPIOB, GPIO8);
while (1) {
gpio_set(GPIOB, GPIO9);
gadget0_run(usbd_dev);
gpio_clear(GPIOB, GPIO9);
}
}