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Copy pathusbdfu.c
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116 lines (97 loc) · 2.89 KB
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/*
* This file is part of the Black Magic Debug project.
*
* Copyright (C) 2013 Gareth McMullin <[email protected]>
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <libopencm3/cm3/systick.h>
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/cm3/scb.h>
#include "usbdfu.h"
#include "platform.h"
uintptr_t app_address = 0x08002000;
int dfu_activity_counter = 0;
void dfu_detach(void)
{
/* USB device must detach, we just reset... */
scb_reset_system();
}
int main(void)
{
/* Check the force bootloader pin*/
rcc_periph_clock_enable(RCC_GPIOB);
if (gpio_get(GPIOB, GPIO12))
dfu_jump_app_if_valid();
dfu_protect(false);
rcc_clock_setup_pll(&rcc_hse_configs[RCC_CLOCK_HSE8_72MHZ]);
systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
systick_set_reload(900000);
/* Configure USB related clocks and pins. */
rcc_periph_clock_enable(RCC_GPIOA);
rcc_periph_clock_enable(RCC_USB);
gpio_set_mode(GPIOA, GPIO_MODE_INPUT, 0, GPIO8);
systick_interrupt_enable();
systick_counter_enable();
/* Configure the LED pins. */
gpio_set_mode(LED_PORT, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, LED_0 | LED_1 | LED_2);
dfu_init(&st_usbfs_v1_usb_driver);
/* Configure the USB pull up pin. */
gpio_set(GPIOA, GPIO8);
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO8);
dfu_main();
}
void dfu_event(void)
{
/* If the counter was at 0 before we should reset LED status. */
if (dfu_activity_counter == 0) {
gpio_clear(LED_PORT, LED_0 | LED_1 | LED_2);
}
/* Prevent the sys_tick_handler from blinking leds for a bit. */
dfu_activity_counter = 10;
/* Toggle the DFU activity LED. */
gpio_toggle(LED_PORT, LED_1);
}
void sys_tick_handler(void)
{
static int count = 0;
static bool reset = true;
/* Run the LED show only if there is no DFU activity. */
if (dfu_activity_counter != 0) {
dfu_activity_counter--;
reset = true;
} else {
if (reset) {
gpio_clear(LED_PORT, LED_0 | LED_1 | LED_2);
count = 0;
reset = false;
}
switch (count) {
case 0:
gpio_toggle(LED_PORT, LED_2); /* LED2 on/off */
count++;
break;
case 1:
gpio_toggle(LED_PORT, LED_1); /* LED1 on/off */
count++;
break;
case 2:
gpio_toggle(LED_PORT, LED_0); /* LED0 on/off */
count = 0;
break;
}
}
}