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