Diff: HSP/Interfaces/QuadSpiInterface.cpp

Revision:

21:51e162c130a9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HSP/Interfaces/QuadSpiInterface.cpp	Thu Jul 16 14:59:04 2020 +0000
@@ -0,0 +1,108 @@
+/*******************************************************************************
+ * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * 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 MAXIM INTEGRATED 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.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *******************************************************************************
+ */
+#include "QuadSpiInterface.h"
+
+/**
+* @brief Constructor that accepts pin names for the QUAD SPI interface
+* @param mosi master out slave in pin name
+* @param miso master in slave out pin name
+* @param sclk serial clock pin name
+* @param cs chip select pin name
+*/
+QuadSpiInterface::QuadSpiInterface(PinName mosi, PinName miso, PinName sclk,
+                                   PinName cs)
+    : spi(mosi, miso, sclk), csPin(cs) {
+
+    }
+
+/**
+* @brief Transmit and recieve QUAD SPI data
+* @param tx_buf pointer to transmit byte buffer
+* @param tx_size number of bytes to transmit
+* @param rx_buf pointer to the recieve buffer
+* @param rx_size number of bytes to recieve
+* @param last flag to indicate if this is the last QUAD SPI transaction for the
+* current chip select cycle
+*/
+int QuadSpiInterface::SPI_Transmit(const uint8_t *tx_buf, uint32_t tx_size,
+                                   uint8_t *rx_buf, uint32_t rx_size,
+                                   int last) {
+  uint32_t i;
+  int result = 0;
+  int index = 0;
+  // lower chip select
+  csPin = 0;
+  // write bytes out QUAD SPI
+  spi.setQuadMode();
+  for (i = 0; i < tx_size; i++) {
+    rx_buf[index] = spi.write((int)tx_buf[i]);
+    index++;
+  }
+  // read in bytes from QUAD SPI
+  for (i = 0; i < rx_size; i++) {
+    rx_buf[index] = (uint8_t)spi.read();
+    index++;
+  }
+  // raise chip select if this is the last transaction
+    if (last) csPin = 1;
+  return result;
+}
+
+/**
+* @brief Transmit and recieve QUAD SPI data
+* @param tx_buf pointer to transmit byte buffer
+* @param tx_size number of bytes to transmit
+* @param rx_buf pointer to the recieve buffer
+* @param rx_size number of bytes to recieve
+* @param last flag to indicate if this is the last QUAD SPI transaction for the
+* current chip select cycle
+*/
+int QuadSpiInterface::SPI_Transmit4Wire(const uint8_t *tx_buf, uint32_t tx_size,
+                                        uint8_t *rx_buf, uint32_t rx_size,
+                                        int last) {
+  uint32_t i;
+  int result = 0;
+  int index = 0;
+  // lower chip select
+  csPin = 0;
+  // write bytes out Single SPI
+  spi.setSingleMode();
+  for (i = 0; i < tx_size; i++) {
+    rx_buf[index] = spi.write((int)tx_buf[i]);
+    index++;
+  }
+  // raise chip select if this is the last transaction
+    if (last) csPin = 1;
+  return result;
+}
+