/* * This file is part of the Black Magic Debug project. * * Copyright (C) 2013 Gareth McMullin * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include #include #include #include #include #include "usbdfu.h" uint32_t app_address = 0x08002000; void dfu_detach(void) { /* Disconnect USB cable by resetting USB Device and pulling USB_DP low*/ rcc_periph_reset_pulse(RST_USB); rcc_periph_clock_enable(RCC_USB); rcc_periph_clock_enable(RCC_GPIOA); gpio_clear(GPIOA, GPIO12); gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_OPENDRAIN, GPIO12); scb_reset_system(); } int main(void) { /* Check the force bootloader pin*/ uint16_t pin_b; rcc_periph_clock_enable(RCC_GPIOA); rcc_periph_clock_enable(RCC_GPIOB); /* Switch PB5 (SWIM_RST_IN) up */ gpio_set(GPIOB, GPIO5); gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO5); gpio_set(GPIOB, GPIO5); pin_b = gpio_get(GPIOB, GPIO6); /* Check state on PB6 ((SWIM_RST) and release PB5*/ pin_b = gpio_get(GPIOB, GPIO6); gpio_set_mode(GPIOB, GPIO_MODE_INPUT, GPIO_CNF_INPUT_FLOAT, GPIO5); if(((GPIOA_CRL & 0x40) == 0x40) && pin_b) dfu_jump_app_if_valid(); dfu_protect(DFU_MODE); rcc_clock_setup_in_hse_8mhz_out_72mhz(); systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8); systick_set_reload(900000); /* Handle USB disconnect/connect */ /* Just in case: Disconnect USB cable by resetting USB Device * and pulling USB_DP low * Device will reconnect automatically as Pull-Up is hard wired*/ rcc_periph_reset_pulse(RST_USB); rcc_periph_clock_enable(RCC_USB); rcc_periph_clock_enable(RCC_GPIOA); gpio_clear(GPIOA, GPIO12); gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_OPENDRAIN, GPIO12); /* Handle LED*/ gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO8); systick_interrupt_enable(); systick_counter_enable(); dfu_init(&stm32f103_usb_driver, DFU_MODE); dfu_main(); } void sys_tick_handler(void) { gpio_toggle(GPIOA, GPIO8); }