Rate-limit core0 card_status polling loops

src/usb/ccid/ccid.c

@@ -345,7 +345,13 @@ void driver_exec_finished_cont_ccid(uint8_t itf, uint16_t size_next, uint16_t of
 }
 
 void ccid_task(void) {
+    const uint32_t status_poll_interval_ms = 1;
+    static uint32_t last_status_poll_ms[8] = {0};
+    uint32_t now_ms = board_millis();
     for (uint8_t itf = 0; itf < ITF_SC_TOTAL; itf++) {
+        if (itf < (sizeof(last_status_poll_ms) / sizeof(last_status_poll_ms[0])) &&
+            now_ms - last_status_poll_ms[itf] >= status_poll_interval_ms) {
+            last_status_poll_ms[itf] = now_ms;
             int status = card_status(sc_itf_to_usb_itf(itf));
             if (status == PICOKEYS_OK) {
                 driver_exec_finished_ccid(itf, finished_data_size);
@@ -353,6 +359,7 @@ void ccid_task(void) {
             else if (status == PICOKEYS_ERR_BLOCKED) {
                 driver_exec_timeout_ccid(itf);
             }
+        }
         if (ccid_tx[itf].w_ptr > ccid_tx[itf].r_ptr) {
             if (driver_write_ccid(itf, ccid_tx[itf].buffer + ccid_tx[itf].r_ptr, ccid_tx[itf].w_ptr - ccid_tx[itf].r_ptr) > 0) {
 

src/usb/hid/hid.c

@@ -601,6 +601,8 @@ void driver_exec_finished_cont_hid(uint8_t itf, uint16_t size_next, uint16_t off
 }
 
 void hid_task(void) {
+    const uint32_t status_poll_interval_ms = 1;
+    static uint32_t last_status_poll_ms = 0;
 #ifdef ENABLE_EMULATION
     uint16_t rx_len = emul_read(ITF_HID);
     if (rx_len) {
@@ -620,6 +622,9 @@ void hid_task(void) {
     if (proc_pkt == 0) {
         driver_process_usb_nopacket_hid();
     }
+    uint32_t now_ms = board_millis();
+    if (now_ms - last_status_poll_ms >= status_poll_interval_ms) {
+        last_status_poll_ms = now_ms;
         int status = card_status(ITF_HID);
         if (status == PICOKEYS_OK) {
             driver_exec_finished_hid(finished_data_size);
@@ -627,6 +632,7 @@ void hid_task(void) {
         else if (status == PICOKEYS_ERR_BLOCKED) {
             send_keepalive();
         }
+    }
     if (hid_tx[ITF_HID_CTAP].w_ptr > hid_tx[ITF_HID_CTAP].r_ptr && last_write_result[ITF_HID_CTAP] != WRITE_PENDING) {
         if (driver_write_hid(ITF_HID_CTAP, hid_tx[ITF_HID_CTAP].buffer + hid_tx[ITF_HID_CTAP].r_ptr, 64) > 0) {
 

src/usb/lwip/rest_server.c

@@ -209,6 +209,8 @@ static void send_json_error(rest_conn_t *conn, int status_code, const char *erro
 }
 
 void rest_task(void) {
+    const uint32_t status_poll_interval_ms = 1;
+    static uint32_t last_status_poll_ms = 0;
     if (!rest_core1_job_pending_load()) {
         rest_route_handler_t handler = rest_background_job_pop();
         if (handler != NULL) {
@@ -219,6 +221,12 @@ void rest_task(void) {
         }
         return;
     }
+    uint32_t now_ms = board_millis();
+    if (now_ms - last_status_poll_ms < status_poll_interval_ms) {
+        return;
+    }
+    last_status_poll_ms = now_ms;
+
     int status = card_status(ITF_LWIP);
     if (status != PICOKEYS_OK) {
         return;