void storage_irq_handler(void) {
#if USE_INTERNAL
if (!(flash_flags & FLASH_FLAG_DIRTY)) {
return;
}
// This code uses interrupts to erase the flash
/*
if (flash_erase_state == 0) {
flash_erase_it(flash_cache_sector_start, (const uint32_t*)CACHE_MEM_START_ADDR, flash_cache_sector_size / 4);
flash_erase_state = 1;
return;
}
if (flash_erase_state == 1) {
// wait for erase
// TODO add timeout
#define flash_erase_done() (__HAL_FLASH_GET_FLAG(FLASH_FLAG_BSY) == RESET)
if (!flash_erase_done()) {
return;
}
flash_erase_state = 2;
}
*/
// This code erases the flash directly, waiting for it to finish
if (!(flash_flags & FLASH_FLAG_ERASED)) {
flash_erase(flash_cache_sector_start, (const uint32_t*)CACHE_MEM_START_ADDR, flash_cache_sector_size / 4);
flash_flags |= FLASH_FLAG_ERASED;
return;
}
// If not a forced write, wait at least 5 seconds after last write to flush
// On file close and flash unmount we get a forced write, so we can afford to wait a while
if ((flash_flags & FLASH_FLAG_FORCE_WRITE) || sys_tick_has_passed(flash_tick_counter_last_write, 5000)) {
// sync the cache RAM buffer by writing it to the flash page
flash_write(flash_cache_sector_start, (const uint32_t*)CACHE_MEM_START_ADDR, flash_cache_sector_size / 4);
// clear the flash flags now that we have a clean cache
flash_flags = 0;
// indicate a clean cache with LED off
led_state(PYB_LED_RED, 0);
}
#endif
}
// waits until at least delay_ms milliseconds have passed from the sampling of
// startTick. Handles overflow properly. Assumes stc was taken from
// HAL_GetTick() some time before calling this function.
void sys_tick_wait_at_least(uint32_t start_tick, uint32_t delay_ms) {
while (!sys_tick_has_passed(start_tick, delay_ms)) {
__WFI(); // enter sleep mode, waiting for interrupt
}
}
