*
* 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; version 2 of the License.
+ * the Free Software Foundation; either version 2 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
#include <ao_boot.h>
#include <ao_exti.h>
-void
+int
ao_boot_check_pin(void)
{
uint16_t v;
/* Enable power interface clock */
stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_PWREN);
-
+
/* Enable the input pin */
ao_enable_input(&AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN,
AO_BOOT_APPLICATION_MODE);
+ for (v = 0; v < 100; v++)
+ ao_arch_nop();
+
/* Read the value */
v = stm_gpio_get(&AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN);
/* Reset the chip to turn off the port and the power interface clock */
ao_gpio_set_mode(&AO_BOOT_APPLICATION_GPIO, AO_BOOT_APPLICATION_PIN, 0);
ao_disable_port(&AO_BOOT_APPLICATION_GPIO);
- stm_rcc.apb1enr &= ~(1 << STM_RCC_APB1ENR_PWREN);
- if (v == AO_BOOT_APPLICATION_VALUE)
- ao_boot_chain(AO_BOOT_APPLICATION_BASE);
+ stm_rcc.apb1enr &= ~(1UL << STM_RCC_APB1ENR_PWREN);
+ return v == AO_BOOT_APPLICATION_VALUE;
}