Reorganizing core0/core1 split.

Now CBOR and APDU (i.e., intensive processing) areas are executed on core1, while core0 is dedicated for hardware tasks (usb, button, led, etc.).

src/fido/cbor.c

@@ -22,14 +22,17 @@
 #include "ctap_hid.h"
 #include "fido.h"
 #include "hsm.h"
+#include "usb.h"
+#include "apdu.h"
 
 const bool _btrue = true, _bfalse = false;
 
 const uint8_t aaguid[16] = {0x89, 0xFB, 0x94, 0xB7, 0x06, 0xC9, 0x36, 0x73, 0x9B, 0x7E, 0x30, 0x52, 0x6D, 0x96, 0x81, 0x45}; // First 16 bytes of SHA256("Pico FIDO2")
 
-int cbor_process(const uint8_t *data, size_t len) {
-    if (scan_files() != CCID_OK)
-        return -CTAP1_ERR_OTHER;
+const uint8_t *cbor_data = NULL;
+size_t cbor_len = 0;
+
+int cbor_parse(const uint8_t *data, size_t len) {
     if (len == 0)
         return -CTAP1_ERR_INVALID_LEN;
     driver_prepare_response();
@@ -40,6 +43,33 @@ int cbor_process(const uint8_t *data, size_t len) {
     else if (data[0] == CTAP_RESET)
         return cbor_reset();
     else if (data[0] == CTAP_CLIENT_PIN)
-        return cbor_client_pin(data+1, len-1);
+        return cbor_client_pin(data + 1, len - 1);
     return -CTAP2_ERR_INVALID_CBOR;
 }
+
+void cbor_thread() {
+
+    while (1) {
+        uint32_t m;
+        queue_remove_blocking(&usb_to_card_q, &m);
+
+        if (m == EV_EXIT) {
+
+	        break;
+	    }
+
+        apdu.sw = cbor_parse(cbor_data, cbor_len);
+
+        finished_data_size = res_APDU_size+1;
+        uint32_t flag = EV_EXEC_FINISHED;
+        queue_add_blocking(&card_to_usb_q, &flag);
+    }
+}
+
+int cbor_process(const uint8_t *data, size_t len) {
+    cbor_data = data;
+    cbor_len = len;
+    res_APDU = ctap_resp->init.data + 1;
+    res_APDU_size = 0;
+    return 1;
+}