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diff --git a/wirish/comm/HardwareSPI.h b/wirish/comm/HardwareSPI.h
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+/* *****************************************************************************
+ * The MIT License
+ *
+ * Copyright (c) 2010 Perry Hung.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ * ****************************************************************************/
+
+/**
+ * @brief HardwareSPI definitions
+ */
+
+#ifndef _HARDWARESPI_H_
+#define _HARDWARESPI_H_
+
+typedef enum SPIFrequency {
+   SPI_18MHZ       = 0,
+   SPI_9MHZ        = 1,
+   SPI_4_5MHZ      = 2,
+   SPI_2_25MHZ     = 3,
+   SPI_1_125MHZ    = 4,
+   SPI_562_500KHZ  = 5,
+   SPI_281_250KHZ  = 6,
+   SPI_140_625KHZ  = 7,
+   MAX_SPI_FREQS   = 8,
+} SPIFrequency;
+
+class HardwareSPI {
+   private:
+      uint32 spi_num;
+
+   public:
+      HardwareSPI(uint32 spi_num);
+      void begin(void);
+      void begin(SPIFrequency freq, uint32 endianness, uint32 mode);
+      void send(uint8 data);
+      uint8 recv(void);
+};
+
+#endif
+