#include "boot_port.h"
#include "stm32g4xx_hal.h"
#define REQUEST_MAGIC 0x42555342UL
static uint32_t reset_at;
static bool reset_pending;
static void backup_access(void)
{
    __HAL_RCC_PWR_CLK_ENABLE();
    HAL_PWR_EnableBkUpAccess();
    __HAL_RCC_RTCAPB_CLK_ENABLE();
}
bool g474_boot_requested(void)
{
    bool requested;
    backup_access(); requested = TAMP->BKP0R == REQUEST_MAGIC;
    TAMP->BKP0R = 0; return requested;
}
void g474_request_boot(uint32_t now)
{
    backup_access(); TAMP->BKP0R = REQUEST_MAGIC;
    reset_at = now + 500; reset_pending = true;
}
void g474_reset_poll(uint32_t now)
{
    if (reset_pending && (int32_t)(now - reset_at) >= 0) NVIC_SystemReset();
}