95 lines
2.7 KiB
C
95 lines
2.7 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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uint32_t app_address = 0x08002000;
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void dfu_detach(void)
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{
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/* Disconnect USB cable by resetting USB Device
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and pulling USB_DP low*/
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rcc_periph_reset_pulse(RST_USB);
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rcc_periph_clock_enable(RCC_USB);
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rcc_periph_clock_enable(RCC_GPIOA);
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gpio_clear(GPIOA, GPIO12);
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gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
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GPIO_CNF_OUTPUT_OPENDRAIN, GPIO12);
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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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uint16_t pin_b;
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rcc_periph_clock_enable(RCC_GPIOA);
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rcc_periph_clock_enable(RCC_GPIOB);
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/* Switch PB5 (SWIM_RST_IN) up */
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gpio_set(GPIOB, GPIO5);
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gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ,
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GPIO_CNF_OUTPUT_PUSHPULL, GPIO5);
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gpio_set(GPIOB, GPIO5);
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pin_b = gpio_get(GPIOB, GPIO6);
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/* Check state on PB6 ((SWIM_RST) and release PB5*/
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pin_b = gpio_get(GPIOB, GPIO6);
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gpio_set_mode(GPIOB, GPIO_MODE_INPUT,
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GPIO_CNF_INPUT_FLOAT, GPIO5);
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if(((GPIOA_CRL & 0x40) == 0x40) && pin_b)
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dfu_jump_app_if_valid();
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dfu_protect(DFU_MODE);
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rcc_clock_setup_in_hse_8mhz_out_72mhz();
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systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
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systick_set_reload(900000);
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/* Handle USB disconnect/connect */
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/* Just in case: Disconnect USB cable by resetting USB Device
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* and pulling USB_DP low
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* Device will reconnect automatically as Pull-Up is hard wired*/
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rcc_periph_reset_pulse(RST_USB);
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rcc_periph_clock_enable(RCC_USB);
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rcc_periph_clock_enable(RCC_GPIOA);
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gpio_clear(GPIOA, GPIO12);
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gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
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GPIO_CNF_OUTPUT_OPENDRAIN, GPIO12);
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/* Handle LED*/
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gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
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GPIO_CNF_OUTPUT_PUSHPULL, GPIO8);
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systick_interrupt_enable();
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systick_counter_enable();
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dfu_init(&stm32f103_usb_driver, DFU_MODE);
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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(GPIOA, GPIO8);
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}
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