2 * Copyright © 2013 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
23 ao_boot_check_pin(void)
27 /* Enable power interface clock */
28 // stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_PWREN);
30 /* Enable the input pin */
31 ao_enable_input(AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN,
32 AO_BOOT_APPLICATION_MODE);
34 for (v = 0; v < 100; v++)
38 v = ao_gpio_get(AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN, AO_BOOT_APPLICATION);
40 /* Reset the chip to turn off the port and the power interface clock */
41 ao_gpio_set_mode(AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN, 0);
42 ao_disable_port(AO_BOOT_APPLICATION_GPIO);
43 // stm_rcc.apb1enr &= ~(1 << STM_RCC_APB1ENR_PWREN);
44 if (v == AO_BOOT_APPLICATION_VALUE)
45 ao_boot_chain(AO_BOOT_APPLICATION_BASE);