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

Revision:

150:02e0a0aed4ec

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+++ b/targets/TARGET_Maxim/TARGET_MAX32625/mxc/pt.h	Tue Nov 08 17:45:16 2016 +0000
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+/*******************************************************************************
+ * 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: 2016-03-21 14:44:55 -0500 (Mon, 21 Mar 2016) $
+ * $Revision: 22017 $
+ *
+ ******************************************************************************/
+
+/**
+ * @file  pt.h
+ * @addtogroup pt Pulse Train
+ * @brief This is the high level API for the pulse train module
+ * @{
+ *
+ */
+
+#ifndef _PT_H
+#define _PT_H
+
+#include "mxc_config.h"
+#include "pt_regs.h"
+#include "mxc_assert.h"
+#include "mxc_sys.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/// @struct pt_pt_cfg_t
+/// Pulse train mode configuration structure. @note Do not use for square wave
+typedef struct {
+    uint32_t bps;           ///< pulse train bit rate
+    uint32_t pattern;       ///< Output pattern to shift out, starts at LSB
+    uint8_t ptLength;       ///< Number of bits in pulse train, 0 = 32bits, 1 = non valid , 2 = 2 bits, ...
+    uint16_t loop;          ///< Number of times to repeat the train, 0 = continuous
+    uint16_t loopDelay;     ///< Delay between loops specified in bits Example: loopDelay = 4,  delays time  = time it takes to shift out 4 bits
+} pt_pt_cfg_t;
+
+/**
+ * @brief This function initializes pulse train modules to a known stopped state
+ *        and sets the global PT clock scale
+ * @param clk_scale scale the system clock for the global PT clock
+ */
+void PT_Init(sys_pt_clk_scale clk_scale);
+
+/**
+ * @brief   Configures the pulse train in the specified mode.
+ * @details The parameters in config structure must be set before calling this function.
+ *          This function should be used for configuring pulse train mode only.
+ * @note    The pulse train cannot be running when this function is called
+ *
+ * @param   pt      pulse train to operate on
+ * @param   cfg     pointer to pulse train configuration
+ * @param   sysCfg  pointer to pulse train system GPIO configuration
+ *
+ * @returns E_NO_ERROR if everything is successful, error if unsuccessful.
+ */
+int PT_PTConfig(mxc_pt_regs_t *pt, pt_pt_cfg_t *cfg, const sys_cfg_pt_t *sysCfg);
+
+/**
+ * @brief   Configures the pulse train in the square wave mode.
+ * @details This function should be used for configuring square wave mode only.
+ * @note    The pulse train cannot be running when this function is called
+ *
+ * @param   pt      pulse train to operate on
+ * @param   freq    square wave output frequency in Hz
+ * @param   sysCfg  pointer to pulse train system GPIO configuration
+ *
+ * @returns E_NO_ERROR if everything is successful, error if unsuccessful.
+ */
+int PT_SqrWaveConfig(mxc_pt_regs_t *pt, uint32_t freq, const sys_cfg_pt_t *sysCfg);
+
+/**
+ * @brief   Starts the pulse train specified
+ *
+ * @param   pt      pulse train to operate on
+ */
+__STATIC_INLINE void PT_Start(mxc_pt_regs_t *pt)
+{
+    int ptIndex = MXC_PT_GET_IDX(pt);
+
+    MXC_PTG->enable |= (1 << ptIndex);
+
+    //wait for PT to start
+    while( (MXC_PTG->enable & (1 << ptIndex)) == 0 );
+}
+
+/**
+ * @brief   Start multiple pulse train modules together.
+ *
+ * @param   pts     set the bits of pulse trains to start
+ *                  Bit0-\>pt0, Bit1-\>pt1... etc.
+ */
+__STATIC_INLINE void PT_StartMulti(uint32_t pts)
+{
+    MXC_PTG->enable |= pts;
+
+    //wait for PTs to start
+    while( (MXC_PTG->enable & pts) != pts );
+}
+
+/**
+ * @brief   Stops a pulse train
+ *
+ * @param   pt      pulse train to operate on
+ */
+__STATIC_INLINE void PT_Stop(mxc_pt_regs_t *pt)
+{
+    int ptIndex = MXC_PT_GET_IDX(pt);
+
+    MXC_PTG->enable &= ~(1 << ptIndex);
+}
+
+/**
+ * @brief   Stop multiple pulse trains together
+ *
+ * @param   pts     set the bits of pulse trains to stop
+ *                  Bit0-\>pt0, Bit1-\>pt1... etc.
+ */
+__STATIC_INLINE void PT_StopMulti(uint32_t pts)
+{
+    MXC_PTG->enable &= ~(pts);
+}
+
+/**
+ * @brief   Determines if the pulse train is running
+ *
+ * @param   pt      pulse train to operate on
+ *
+ * @return  0 = pulse train is off, non-zero = pulse train is on
+ */
+__STATIC_INLINE uint32_t PT_IsActive(mxc_pt_regs_t *pt)
+{
+    int ptIndex = MXC_PT_GET_IDX(pt);
+
+    return (!!(MXC_PTG->enable & (1 << ptIndex)));
+}
+
+/**
+ * @brief   Determines if the pulse trains selected are running
+ *
+ * @param   pts     set the bits of pulse trains to check
+ *                  Bit0-\>pt0, Bit1-\>pt1... etc.
+ *
+ * @return  0 = all pulse trains are off, non-zero = at least one pulse train is on
+ */
+__STATIC_INLINE uint32_t PT_IsActiveMulti(uint32_t pts)
+{
+    return (MXC_PTG->enable & pts);
+}
+
+/**
+ * @brief   Sets the pattern of the pulse train
+ *
+ * @param   pt      Pointer to pulse train to operate on
+ * @param   pattern output pattern
+ *
+ */
+__STATIC_INLINE void PT_SetPattern(mxc_pt_regs_t *pt, uint32_t pattern)
+{
+    pt->train = pattern;
+}
+
+/**
+ * @brief   Enable pulse train interrupt
+ *
+ * @param   pts     Pointer to pulse train to operate on
+ */
+__STATIC_INLINE void PT_EnableINT(mxc_pt_regs_t *pt)
+{
+    int ptIndex = MXC_PT_GET_IDX(pt);
+
+    MXC_PTG->inten |= (1 << ptIndex);
+}
+
+/**
+ * @brief   Enable interrupts for the pulse trains selected
+ *
+ * @param   pts     set the bits of pulse trains to enable
+ *                  Bit0-\>pt0, Bit1-\>pt1... etc.
+ */
+__STATIC_INLINE void PT_EnableINTMulti(uint32_t pts)
+{
+    MXC_PTG->inten |= pts;
+}
+
+/**
+ * @brief   Disable pulse train interrupt
+ *
+ * @param   pts     pulse train to operate on
+ */
+__STATIC_INLINE void PT_DisableINT(mxc_pt_regs_t *pt)
+{
+    int ptIndex = MXC_PT_GET_IDX(pt);
+
+    MXC_PTG->inten &= ~(1 << ptIndex);
+}
+
+/**
+ * @brief   Disable interrupts for the pulse trains selected
+ *
+ * @param   pts     set the bits of pulse trains to enable
+ *                  Bit0-\>pt0, Bit1-\>pt1... etc.
+ */
+__STATIC_INLINE void PT_DisableINTMulti(uint32_t pts)
+{
+    MXC_PTG->inten &= ~pts;
+}
+/**
+ * @brief   Gets the pulse trains's interrupt flags
+ *
+ * @return  The Pulse Train Flags, bits that are 1 are set.
+ */
+__STATIC_INLINE uint32_t PT_GetFlags(void)
+{
+    return MXC_PTG->intfl;
+}
+
+/**
+ * @brief   Clears the pulse train's interrupt flag
+ *
+ * @param   mask    bits to clear
+ *
+ */
+__STATIC_INLINE void PT_ClearFlags(uint32_t mask)
+{
+    MXC_PTG->intfl = mask;
+}
+
+/**
+ * @brief   Setup and enables a pulse train to restart after another pulse train has exited its loop.
+ *          Each pulse train can have up to two restart triggers.
+ *
+ * @param   ptToRestart     pulse train to restart after \a ptStop ends
+ * @param   ptStop          pulse train that stops and triggers \a ptToRestart to begin
+ * @param   restartIndex    selects which restart trigger to set (0 or 1)
+ */
+__STATIC_INLINE void PT_SetRestart(mxc_pt_regs_t *ptToRestart, mxc_pt_regs_t *ptStop, uint8_t restartIndex)
+{
+    int ptStopIndex = MXC_PT_GET_IDX(ptStop);
+
+    MXC_ASSERT(ptStopIndex >= 0);
+
+    if(restartIndex) {
+        ptToRestart->restart |= (ptStopIndex << MXC_F_PT_RESTART_PT_Y_SELECT_POS) |
+                                MXC_F_PT_RESTART_ON_PT_Y_LOOP_EXIT;
+    } else {
+        ptToRestart->restart |= (ptStopIndex << MXC_F_PT_RESTART_PT_X_SELECT_POS) |
+                                MXC_F_PT_RESTART_ON_PT_X_LOOP_EXIT;
+    }
+}
+
+/**
+ * @brief   Disable the restart for the specified pulse train
+ *
+ * @param   ptToRestart     pulse train to disable the restart
+ * @param   restartIndex    selects which restart trigger to disable (0 or 1)
+ */
+__STATIC_INLINE void PT_RestartDisable(mxc_pt_regs_t *ptToRestart, uint8_t restartIndex)
+{
+    if(restartIndex)
+        ptToRestart->restart &= ~MXC_F_PT_RESTART_ON_PT_Y_LOOP_EXIT;
+    else
+        ptToRestart->restart &= ~MXC_F_PT_RESTART_ON_PT_X_LOOP_EXIT;
+}
+
+/**
+ * @brief   Resynchronize individual pulse trains together.
+ *          Resync will stop those resync_pts; others will be still running
+ *
+ * @param   resyncPts       pulse train modules that need to be re-synced by bit number.
+ *                          Bit0-\>pt0, Bit1-\>pt1... etc.
+ */
+__STATIC_INLINE void PT_Resync(uint32_t resyncPts)
+{
+    MXC_PTG->resync = resyncPts;
+    while(MXC_PTG->resync);
+}
+
+/**@}*/
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _PT_H_ */