Diff: targets/TARGET_Maxim/TARGET_MAX32625/mxc/spix.h

Revision:

151:02e0a0aed4ec

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/TARGET_MAX32625/mxc/spix.h	Tue Nov 08 17:45:16 2016 +0000
@@ -0,0 +1,126 @@
+/*******************************************************************************
+ * 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.
+ *
+ * $Date: 2016-05-26 11:38:10 -0500 (Thu, 26 May 2016) $
+ * $Revision: 23065 $
+ *
+ ******************************************************************************/
+
+/**
+ * @file  spix.h
+ * @brief This is the high level API for the serial peripheral interface execute in place module.
+ * @warning If using this SPIX with IAR Embedded Workbench for Arm, it is required to define
+ *          <tt>IAR_SPIX_PRAGMA=1</tt>. This should be done under Project->Options->
+ *          C/C++ Compiler->Preprocessor in the Defined Symbols input box. See the IAR documentation
+ *          for additional information on how to set a preprocessor define in a project.
+ */
+
+#include "mxc_sys.h"
+#include "spix_regs.h"
+
+#ifndef _SPIX_H_
+#define _SPIX_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/***** Definitions *****/
+
+/// @brief Options for number of I/O pins to use during for each fetch stage
+typedef enum {
+    SPIX_SINGLE_IO = MXC_V_SPIX_FETCH_CTRL_CMD_WIDTH_SINGLE,
+    SPIX_DUAL_IO = MXC_V_SPIX_FETCH_CTRL_CMD_WIDTH_DUAL_IO,
+    SPIX_QUAD_IO = MXC_V_SPIX_FETCH_CTRL_CMD_WIDTH_QUAD_IO
+} spix_width_t;
+
+/// @brief  Options for number of address bytes to use during fetch
+typedef enum {
+    SPIX_3BYTE_FETCH_ADDR = 0,
+    SPIX_4BYTE_FETCH_ADDR = 1
+} spix_addr_size_t;
+
+/// @brief SPIX fetch configuration.
+typedef struct {
+    spix_width_t cmd_width;                 ///< Number of I/O lines used for command SPI transaction.
+    spix_width_t addr_width;                ///< Number of I/O lines used for address SPI transaction.
+    spix_width_t data_width;                ///< Number of I/O lines used for data SPI transaction.
+    spix_addr_size_t addr_size;             ///< Use 3 or 4 byte addresses for fetches.
+    uint8_t cmd;                            ///< Command value to initiate fetch.
+    uint8_t mode_clocks;                    ///< Number of SPI clocks required during mode phase of fetch.
+    uint8_t no_cmd_mode;                    ///< Read command sent only once.
+    uint16_t mode_data;                     ///< Data sent with mode clocks.
+} spix_fetch_t;
+
+/***** Globals *****/
+
+/***** Function Prototypes *****/
+
+/**
+ *  @brief          Configure SPI execute in place clocking.
+ *  @param  sys_cfg Pointer to system level configuration structure.
+ *  @param  mode    SPI mode to use for the clocking.
+ *  @param  baud    Frequency in hertz to set the clock to. May not be able to achieve with
+ *                  the given clock divider.
+ *  @param  sample  Number of SPIX clocks to delay the sampling of the SDIO lines. Will use
+ *                  feedback mode if set to 0.
+ * @returns #E_NO_ERROR if everything is successful
+ */
+int SPIX_ConfigClock(const sys_cfg_spix_t *sys_cfg, uint32_t baud, uint8_t sample);
+
+/**
+ *  @brief              Configure SPI execute in place slave select.
+ *  @param  ssel        Index of which slave select line to use.
+ *  @param  pol         Polarity of slave select (0 for active low, 1 for active high).
+ *  @param  act_delay   SPIX clocks between slave select assert and active SPI clock.
+ *  @param  inact_delay SPIX clocks between active SPI clock and slave select deassert.
+ */
+void SPIX_ConfigSlave(uint8_t ssel, uint8_t pol, uint8_t act_delay, uint8_t inact_delay);
+
+/**
+ *  @brief          Configure how the SPIX fetches data.
+ *  @param  fetch   Pointer to configuration struct that describes how to fetch data.
+ */
+void SPIX_ConfigFetch(const spix_fetch_t *fetch);
+
+/**
+ * @brief   Shutdown SPIX module.
+ * @param   spix    Pointer to SPIX regs.
+ * @returns #E_NO_ERROR if everything is successful
+ */
+int SPIX_Shutdown(mxc_spix_regs_t *spix);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SPIX_H */