79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/*
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* This file is part of the Black Magic Debug project.
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*
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* Copyright (C) 2013 Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU 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 program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include <libopencm3/cm3/systick.h>
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#include <libopencm3/stm32/rcc.h>
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#include <libopencm3/stm32/gpio.h>
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#include <libopencm3/cm3/scb.h>
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#include "usbdfu.h"
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void dfu_detach(void)
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{
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/* USB device must detach, we just reset... */
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scb_reset_system();
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}
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int main(void)
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{
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/* Check the force bootloader pin*/
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rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPBEN);
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/* Pull up an look if external pulled low or if we restart with PB1 low*/
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GPIOB_PUPDR |= 4;
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for (int i = 0; i < 100000; i++)
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__asm__("NOP");
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if (gpio_get(GPIOB, GPIO1))
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dfu_jump_app_if_valid();
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dfu_protect_enable();
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/* Set up clock*/
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rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_168MHZ]);
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systick_set_clocksource(STK_CTRL_CLKSOURCE_AHB_DIV8);
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systick_set_reload(2100000);
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systick_interrupt_enable();
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systick_counter_enable();
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/* Handle LEDs */
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rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPBEN);
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gpio_clear(GPIOB, GPIO2);
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gpio_mode_setup(GPIOB, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
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GPIO2);
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/* Set up USB*/
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rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPAEN);
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rcc_peripheral_enable_clock(&RCC_AHB2ENR, RCC_AHB2ENR_OTGFSEN);
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/* Set up USB Pins and alternate function*/
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gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE,
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GPIO9 | GPIO10 | GPIO11 | GPIO12);
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gpio_set_af(GPIOA, GPIO_AF10, GPIO9 | GPIO10| GPIO11 | GPIO12);
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dfu_init(&stm32f107_usb_driver);
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dfu_main();
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}
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void sys_tick_handler(void)
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{
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gpio_toggle(GPIOB, GPIO2); /* Green LED on/off */
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}
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