{
}
+const void *stm_interrupt_vector[];
+
+#define BOOT_FETCH(o) (*((uint32_t *) (AO_BOOT_APPLICATION_BASE + (o))))
+
+#ifdef AO_BOOT_APPLICATION_PIN
+#include <ao_exti.h>
+#endif
+
void start(void) {
+#ifdef AO_BOOT_APPLICATION_PIN
+ 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);
+
+ /* 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)
+ {
+ uint32_t sp;
+ uint32_t pc;
+
+ sp = BOOT_FETCH(0);
+ pc = BOOT_FETCH(4);
+ asm ("mov sp, %0" : : "r" (sp));
+ asm ("mov lr, %0" : : "r" (pc));
+ asm ("bx lr");
+ }
+#endif
+
+ /* Set interrupt vector table offset */
+ stm_nvic.vto = (uint32_t) &stm_interrupt_vector;
memcpy(&__data_start__, &__text_end__, &__data_end__ - &__data_start__);
memset(&__bss_start__, '\0', &__bss_end__ - &__bss_start__);
main();