diff --git a/platform/embedded/hal_em9304_spi.h b/platform/embedded/hal_em9304_spi.h
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+++ b/platform/embedded/hal_em9304_spi.h
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2014 BlueKitchen GmbH
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ * 4. Any redistribution, use, or modification is done solely for
+ *    personal benefit and not for any commercial purpose or for
+ *    monetary gain.
+ *
+ * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
+ * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+ * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Please inquire about commercial licensing options at 
+ * contact@bluekitchen-gmbh.com
+ *
+ */
+
+/*
+ *  hal_em9304_spi.h
+ *
+ *  Hardware Abstraction Layer for EM9304 connected via SPI with additional RDY Interrupt line
+ *
+ */
+#ifndef __HAL_EM9304_SPI_H
+#define __HAL_EM9304_SPI_H
+
+#include <stdint.h>
+
+#if defined __cplusplus
+extern "C" {
+#endif
+
+/* API_START */
+
+/**
+ * @brief Initialize SPI
+ */
+void hal_em9304_spi_init(void);
+
+/**
+ * @brief Set callback for RDY - can be called from ISR context
+ * @param callback
+ */
+void hal_em9304_spi_set_ready_callback(void (*callback)(void));
+
+/**
+ * @brief Set callback for transfer complete - can be called from ISR context
+ * @param callback
+ */
+void hal_em9304_spi_set_transfer_done_callback(void (*callback)(void));
+
+/**
+ * @brief Enable READY IRQ
+ */
+void hal_em9304_spi_enable_ready_interrupt(void);
+
+/**
+ * @brief Disable READY IRQ
+ */
+void hal_em9304_spi_disable_ready_interrupt(void);
+
+/**
+ * @brief Poll READY state
+ */
+int hal_em9304_spi_get_ready();
+
+/**
+ * @brief Set Chip Selet
+ * @param enable
+ */
+void hal_em9304_spi_set_chip_select(int enable);
+
+/**
+ * @brief Check if full duplex operation via hal_em9304_spi_transceive is supported
+ */
+int  hal_em9304_spi_fullduplex_support(void);
+
+/**
+ * @brief Transmit and Receive bytes via SPI
+ * @param tx_data buffer to transmit
+ * @param rx_data buffer to receive into
+ * @param len 
+ */
+void hal_em9304_spi_transceive(const uint8_t * tx_data, uint8_t * rx_data, uint16_t len);
+
+/**
+ * @brief Transmit bytes via SPI
+ * @param tx_data buffer to transmit
+ * @param len 
+ */
+void hal_em9304_spi_transmit(const uint8_t * tx_data, uint16_t len);
+
+/**
+ * @brief Receive bytes via SPI
+ * @param rx_data buffer to receive into
+ * @param len 
+ */
+void hal_em9304_spi_receive(uint8_t * rx_data, uint16_t len);
+
+/* API_END */
+    
+#if defined __cplusplus
+}
+#endif
+
+#endif // __HAL_EM9304_SPI_H