pstorage: stuck in erase operation

Question

This is my code snippet 
 int main(void)
{
	uint32_t err_code;
	
	...
	
	// Scheduler
	scheduler_init();
	
	// Initialize the SoftDevice handler module.
 SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, true); // Use scheduler

 ..... register system event dispatch here .......
	
	// Initialize persistent storage module.
	err_code = pstorage_init();	
	APP_ERROR_CHECK(err_code);
	
	storage_param.block_size = DATA_BLOCK_SIZE;
	storage_param.block_count = DATA_BLOCK_COUNT;
	storage_param.cb = pstorage_callback;
	
	err_code = pstorage_register(&storage_param, &storage_handle);
	APP_ERROR_CHECK(err_code);
	
	err_code = pstorage_block_identifier_get(&m_base_handle, 0, &storage_handle);
	APP_ERROR_CHECK(err_code);
	
	err_code = pstorage_clear(&m_base_handle, DATA_BLOCK_COUNT * DATA_BLOCK_SIZE);
	APP_ERROR_CHECK(err_code);

	// Wait until FLASH all cleared
	uint32_t count;
	do {
 err_code = pstorage_access_status_get(&count);
 APP_ERROR_CHECK(err_code);
	} while(count); /* Stuck here??? */
	
 ....
 
}
 
 The program stuck in the while segment, and count is always 0x1. Why?

scytulip · Accepted Answer

Hi all, 
 I repost my question here . I found the problem chain is 
 
 
 pstorage_init() called sd_flash_page_erase() , and set m_cmd_queue.flash_access = true ; 
 
 
 sd_flash_page_erase() will not trigger system event handler which calls pstorage_sys_event_handler , and thus m_cmd_queue.flash_access kept true; 
 
 
 because m_cmd_queue.flash_access is true, then later the pstorage_clear() is not executed immediately but enqueued. 
 
 
 Enqueued command will not be executed, and thus m_cmd_queue.count is always 1. 
 
 
 .........

pstorage: stuck in erase operation

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