Diff: targets/TARGET_Maxim/TARGET_MAX32630/mxc/pt.c

Revision:

157:ff67d9f36b67

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/TARGET_MAX32630/mxc/pt.c	Thu Feb 02 17:01:33 2017 +0000
@@ -0,0 +1,145 @@
+/**
+ * @file
+ * @brief   Pulse Train Engine Function Implementations. 
+ */
+/* *****************************************************************************
+ * 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: 2016-09-08 17:43:36 -0500 (Thu, 08 Sep 2016) $
+ * $Revision: 24327 $
+ *
+ **************************************************************************** */
+
+/* **** Includes **** */
+#include <stddef.h>
+#include "pt.h"
+
+/**
+ * @ingroup pulsetrain 
+ * @{
+ */
+
+/* ************************************************************************* */
+void PT_Init(sys_pt_clk_scale clk_scale)
+{
+    //disable all pulse trains
+    MXC_PTG->enable = 0;
+
+    //clear all interrupts
+    MXC_PTG->intfl = MXC_PTG->intfl;
+
+    SYS_PT_Init(clk_scale);
+}
+
+/* ************************************************************************* */
+int PT_PTConfig(mxc_pt_regs_t *pt, pt_pt_cfg_t *cfg, const sys_cfg_pt_t *sysCfg)
+{
+    int err;
+    uint32_t ptClock;
+    uint32_t rate;
+
+    //check for valid base pointer
+    MXC_ASSERT(MXC_PT_GET_IDX(pt) >= 0);
+
+    if(cfg == NULL)
+        return E_NULL_PTR;
+
+    if(cfg->bps == 0)
+        return E_BAD_PARAM;
+
+    //disable pulse train
+    PT_Stop(pt);
+
+    //setup system GPIO configuration
+    if((err = SYS_PT_Config(pt, sysCfg)) != E_NO_ERROR)
+        return err;
+
+    //get PT clock frequency from SYS level
+    ptClock = SYS_PT_GetFreq();
+
+    if(ptClock == 0)
+        return E_UNINITIALIZED;
+
+    if(ptClock < (cfg->bps))
+        return E_BAD_STATE;
+
+    rate = (ptClock / (cfg->bps));
+
+    pt->rate_length = ((rate << MXC_F_PT_RATE_LENGTH_RATE_CONTROL_POS)
+                       & MXC_F_PT_RATE_LENGTH_RATE_CONTROL) |
+                      ((cfg->ptLength << MXC_F_PT_RATE_LENGTH_MODE_POS)
+                       & MXC_F_PT_RATE_LENGTH_MODE);
+
+    pt->train = cfg->pattern;
+    pt->loop = ((cfg->loop << MXC_F_PT_LOOP_COUNT_POS) & MXC_F_PT_LOOP_COUNT) |
+               ((cfg->loopDelay << MXC_F_PT_LOOP_DELAY_POS) & MXC_F_PT_LOOP_DELAY);
+
+    return E_NO_ERROR;
+}
+
+/* ************************************************************************* */
+int PT_SqrWaveConfig(mxc_pt_regs_t *pt, uint32_t freq, const sys_cfg_pt_t *sysCfg)
+{
+    int err;
+    uint32_t ptClock;
+    uint32_t rate;
+
+    //check for valid base pointer
+    MXC_ASSERT(MXC_PT_GET_IDX(pt) >= 0);
+
+    if(freq == 0)
+        return E_BAD_PARAM;
+
+    //disable pulse train
+    PT_Stop(pt);
+
+    //setup system GPIO configuration
+    if((err = SYS_PT_Config(pt, sysCfg)) != E_NO_ERROR)
+        return err;
+
+    //get PT clock frequency from SYS level
+    ptClock = SYS_PT_GetFreq();
+
+    if(ptClock == 0)
+        return E_UNINITIALIZED;
+
+    if(ptClock < (2*freq))
+        return E_BAD_STATE;
+
+    rate = (ptClock / (2*freq)) + 1;
+
+    pt->rate_length = ((rate << MXC_F_PT_RATE_LENGTH_RATE_CONTROL_POS)
+                       & MXC_F_PT_RATE_LENGTH_RATE_CONTROL) |
+                      (MXC_V_PT_RATE_LENGTH_MODE_SQUARE_WAVE << MXC_F_PT_RATE_LENGTH_MODE_POS);
+
+    return E_NO_ERROR;
+}
+/**@} end of ingroup pulsetrain*/