diff --git a/src/apdu.c b/src/apdu.c
index f726012..dfa0b0e 100644
--- a/src/apdu.c
+++ b/src/apdu.c
@@ -127,6 +127,7 @@ uint16_t set_res_sw(uint8_t sw1, uint8_t sw2) {
 
 void apdu_thread() {
 
+    card_init_core1();
     while (1) {
         uint32_t m;
         queue_remove_blocking(&usb_to_card_q, &m);
diff --git a/src/usb/usb.c b/src/usb/usb.c
index 3e19790..099880f 100644
--- a/src/usb/usb.c
+++ b/src/usb/usb.c
@@ -150,15 +150,14 @@ static int usb_event_handle() {
 }
 
 extern void low_flash_init();
-static void card_init_core1(void) {
-    low_flash_init();
+void card_init_core1() {
+    low_flash_init_core1();
 }
 
 size_t finished_data_size = 0;
 
 void card_start(void (*func)(void)) {
     multicore_reset_core1();
-    card_init_core1();
     multicore_launch_core1(func);
     led_set_blink(BLINK_MOUNTED);
 }
diff --git a/src/usb/usb.h b/src/usb/usb.h
index 28c5281..238b7b7 100644
--- a/src/usb/usb.h
+++ b/src/usb/usb.h
@@ -58,5 +58,6 @@ extern uint32_t usb_write_offset(uint16_t len, uint16_t offset);
 extern void usb_clear_rx();
 extern size_t finished_data_size;
 extern void usb_set_timeout_counter(uint32_t v);
+extern void card_init_core1();
 
 #endif