Add header file halcore.h
diff --git a/st21nfc/include/halcore.h b/st21nfc/include/halcore.h
new file mode 100644
index 0000000..3fcf428
--- /dev/null
+++ b/st21nfc/include/halcore.h
@@ -0,0 +1,105 @@
+/** ----------------------------------------------------------------------
+ *
+ * Copyright (C) 2016 ST Microelectronics S.A.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *
+ ----------------------------------------------------------------------*/
+#ifndef __HALCORE_H_
+#define __HALCORE_H_
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+/* events sent from the callback */
+#define HAL_EVENT_DSWRITE 1 /* write raw HAL data downstream */
+#define HAL_EVENT_DATAIND 2 /* new NCI frame received from CLF */
+#define HAL_EVENT_LINKLOST 3 /* connection/link lost */
+#define HAL_EVENT_ERROR 4 /* protocol got into an error state */
+#define HAL_EVENT_JUNKRECEIVED \
+ 5 /* protocol signals that junk has been received. resyncronization */
+
+#define HAL_EVENT_TIMER_TIMEOUT 6
+
+/* flags to be passed to HalCreate */
+
+#define HAL_WRAPPER_TIMEOUT_EVT 7
+
+#define HAL_FLAG_NO_DEBUG 0 /* disable debug output */
+#define HAL_FLAG_DEBUG 1 /* enable debug output */
+
+bool halTraceMask;
+pthread_mutex_t debugOutputSem;
+
+#ifdef ANDROID
+#include <android/log.h>
+#define LOG(s) \
+ if (!halTraceMask) { \
+ } else { \
+ pthread_mutex_lock(&debugOutputSem); \
+ __android_log_print(ANDROID_LOG_DEBUG, "NfcHalCore", s); \
+ pthread_mutex_unlock(&debugOutputSem); \
+ }
+#define LOGE(s) \
+ { \
+ pthread_mutex_lock(&debugOutputSem); \
+ __android_log_print(ANDROID_LOG_ERROR, "NfcHalCore", s); \
+ pthread_mutex_unlock(&debugOutputSem); \
+ }
+#define LOGV(s, ...) \
+ if (!halTraceMask) { \
+ } else { \
+ pthread_mutex_lock(&debugOutputSem); \
+ __android_log_print(ANDROID_LOG_DEBUG, "NfcHalCore", s, __VA_ARGS__); \
+ pthread_mutex_unlock(&debugOutputSem); \
+ }
+#define LOGVE(s, ...) \
+ { \
+ pthread_mutex_lock(&debugOutputSem); \
+ __android_log_print(ANDROID_LOG_ERROR, "NfcHalCore", s, __VA_ARGS__); \
+ pthread_mutex_unlock(&debugOutputSem); \
+ }
+#else
+#define LOG printf
+#define LOGE printf
+#define LOGV printf
+#define LOGVE printf
+#endif
+
+/* callback function to communicate from HAL Core with the outside world */
+typedef void (*HAL_CALLBACK)(void* context, uint32_t event, const void* data,
+ size_t length);
+
+/* flags to be passed to HALCreate */
+
+typedef void* HALHANDLE;
+
+HALHANDLE HalCreate(void* context, HAL_CALLBACK callback, uint32_t flags);
+
+void HalDestroy(HALHANDLE hHAL);
+
+/* send an NCI frame from the HOST to the CLF */
+bool HalSendDownstream(HALHANDLE hHAL, const uint8_t* data, size_t size);
+
+// HAL WRAPPER
+bool HalSendDownstreamTimer(HALHANDLE hHAL, const uint8_t* data, size_t size,
+ uint8_t duration);
+bool HalSendDownstreamStopTimer(HALHANDLE hHAL);
+
+/* send a complete HDLC frame from the CLF to the HOST */
+bool HalSendUpstream(HALHANDLE hHAL, const uint8_t* data, size_t size);
+
+#endif