Nfc: switch to HAL ticks. ApiHal: small cleanup and refactoring. (#609)

applications/nfc/nfc_cli.c

@@ -19,7 +19,6 @@ void nfc_cli_detect(Cli* cli, string_t args, void* context) {
     rfalNfcDevice* dev_list;
     uint8_t dev_cnt = 0;
     bool cmd_exit = false;
-    api_hal_nfc_init();
     api_hal_nfc_exit_sleep();
     printf("Detecting nfc...\r\nPress Ctrl+C to abort\r\n");
     while(!cmd_exit) {
@@ -51,7 +50,6 @@ void nfc_cli_emulate(Cli* cli, string_t args, void* context) {
         return;
     }
 
-    api_hal_nfc_init();
     api_hal_nfc_exit_sleep();
     printf("Emulating NFC-A Type: T2T UID: CF72D440 SAK: 20 ATQA: 00/04\r\n");
     printf("Press Ctrl+C to abort\r\n");

applications/nfc/nfc_worker.c

@@ -15,9 +15,7 @@ NfcWorker* nfc_worker_alloc() {
     nfc_worker->callback = NULL;
     nfc_worker->context = NULL;
     // Initialize rfal
-    nfc_worker->error = api_hal_nfc_init();
-    if(nfc_worker->error == ERR_NONE) {
-        api_hal_nfc_start_sleep();
+    if(!api_hal_nfc_is_busy()) {
         nfc_worker_change_state(nfc_worker, NfcWorkerStateReady);
     } else {
         nfc_worker_change_state(nfc_worker, NfcWorkerStateBroken);
@@ -35,10 +33,6 @@ NfcWorkerState nfc_worker_get_state(NfcWorker* nfc_worker) {
     return nfc_worker->state;
 }
 
-ReturnCode nfc_worker_get_error(NfcWorker* nfc_worker) {
-    return nfc_worker->error;
-}
-
 void nfc_worker_start(
     NfcWorker* nfc_worker,
     NfcWorkerState state,

applications/nfc/nfc_worker.h

@@ -28,8 +28,6 @@ NfcWorker* nfc_worker_alloc();
 
 NfcWorkerState nfc_worker_get_state(NfcWorker* nfc_worker);
 
-ReturnCode nfc_worker_get_error(NfcWorker* nfc_worker);
-
 void nfc_worker_free(NfcWorker* nfc_worker);
 
 void nfc_worker_start(

applications/nfc/nfc_worker_i.h

@@ -26,7 +26,6 @@ struct NfcWorker {
     void* context;
 
     NfcWorkerState state;
-    ReturnCode error;
 };
 
 void nfc_worker_change_state(NfcWorker* nfc_worker, NfcWorkerState state);