ON Semiconductor / mbed-os

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

targets/TARGET_Maxim/TARGET_MAX32625/mxc/pt.c@0:098463de4c5d, 2017-01-25 (annotated)

Committer:
group-onsemi
Date:
Wed Jan 25 20:34:15 2017 +0000
Revision:
0:098463de4c5d
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 /*******************************************************************************
group-onsemi 0:098463de4c5d 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
group-onsemi 0:098463de4c5d 3 *
group-onsemi 0:098463de4c5d 4 * Permission is hereby granted, free of charge, to any person obtaining a
group-onsemi 0:098463de4c5d 5 * copy of this software and associated documentation files (the "Software"),
group-onsemi 0:098463de4c5d 6 * to deal in the Software without restriction, including without limitation
group-onsemi 0:098463de4c5d 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
group-onsemi 0:098463de4c5d 8 * and/or sell copies of the Software, and to permit persons to whom the
group-onsemi 0:098463de4c5d 9 * Software is furnished to do so, subject to the following conditions:
group-onsemi 0:098463de4c5d 10 *
group-onsemi 0:098463de4c5d 11 * The above copyright notice and this permission notice shall be included
group-onsemi 0:098463de4c5d 12 * in all copies or substantial portions of the Software.
group-onsemi 0:098463de4c5d 13 *
group-onsemi 0:098463de4c5d 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
group-onsemi 0:098463de4c5d 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
group-onsemi 0:098463de4c5d 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
group-onsemi 0:098463de4c5d 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
group-onsemi 0:098463de4c5d 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
group-onsemi 0:098463de4c5d 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
group-onsemi 0:098463de4c5d 20 * OTHER DEALINGS IN THE SOFTWARE.
group-onsemi 0:098463de4c5d 21 *
group-onsemi 0:098463de4c5d 22 * Except as contained in this notice, the name of Maxim Integrated
group-onsemi 0:098463de4c5d 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
group-onsemi 0:098463de4c5d 24 * Products, Inc. Branding Policy.
group-onsemi 0:098463de4c5d 25 *
group-onsemi 0:098463de4c5d 26 * The mere transfer of this software does not imply any licenses
group-onsemi 0:098463de4c5d 27 * of trade secrets, proprietary technology, copyrights, patents,
group-onsemi 0:098463de4c5d 28 * trademarks, maskwork rights, or any other form of intellectual
group-onsemi 0:098463de4c5d 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
group-onsemi 0:098463de4c5d 30 * ownership rights.
group-onsemi 0:098463de4c5d 31 *
group-onsemi 0:098463de4c5d 32 * $Date: 2016-03-11 11:46:37 -0600 (Fri, 11 Mar 2016) $
group-onsemi 0:098463de4c5d 33 * $Revision: 21839 $
group-onsemi 0:098463de4c5d 34 *
group-onsemi 0:098463de4c5d 35 ******************************************************************************/
group-onsemi 0:098463de4c5d 36
group-onsemi 0:098463de4c5d 37 #include <stddef.h>
group-onsemi 0:098463de4c5d 38 #include "pt.h"
group-onsemi 0:098463de4c5d 39
group-onsemi 0:098463de4c5d 40 /******************************************************************************/
group-onsemi 0:098463de4c5d 41 void PT_Init(sys_pt_clk_scale clk_scale)
group-onsemi 0:098463de4c5d 42 {
group-onsemi 0:098463de4c5d 43 //disable all pulse trains
group-onsemi 0:098463de4c5d 44 MXC_PTG->enable = 0;
group-onsemi 0:098463de4c5d 45
group-onsemi 0:098463de4c5d 46 //clear all interrupts
group-onsemi 0:098463de4c5d 47 MXC_PTG->intfl = MXC_PTG->intfl;
group-onsemi 0:098463de4c5d 48
group-onsemi 0:098463de4c5d 49 SYS_PT_Init(clk_scale);
group-onsemi 0:098463de4c5d 50 }
group-onsemi 0:098463de4c5d 51
group-onsemi 0:098463de4c5d 52 /******************************************************************************/
group-onsemi 0:098463de4c5d 53 int PT_PTConfig(mxc_pt_regs_t *pt, pt_pt_cfg_t *cfg, const sys_cfg_pt_t *sysCfg)
group-onsemi 0:098463de4c5d 54 {
group-onsemi 0:098463de4c5d 55 int err;
group-onsemi 0:098463de4c5d 56 uint32_t ptClock;
group-onsemi 0:098463de4c5d 57 uint32_t rate;
group-onsemi 0:098463de4c5d 58
group-onsemi 0:098463de4c5d 59 //check for valid base pointer
group-onsemi 0:098463de4c5d 60 MXC_ASSERT(MXC_PT_GET_IDX(pt) >= 0);
group-onsemi 0:098463de4c5d 61
group-onsemi 0:098463de4c5d 62 if(cfg == NULL)
group-onsemi 0:098463de4c5d 63 return E_NULL_PTR;
group-onsemi 0:098463de4c5d 64
group-onsemi 0:098463de4c5d 65 if(cfg->bps == 0)
group-onsemi 0:098463de4c5d 66 return E_BAD_PARAM;
group-onsemi 0:098463de4c5d 67
group-onsemi 0:098463de4c5d 68 //disable pulse train
group-onsemi 0:098463de4c5d 69 PT_Stop(pt);
group-onsemi 0:098463de4c5d 70
group-onsemi 0:098463de4c5d 71 //setup system GPIO configuration
group-onsemi 0:098463de4c5d 72 if((err = SYS_PT_Config(pt, sysCfg)) != E_NO_ERROR)
group-onsemi 0:098463de4c5d 73 return err;
group-onsemi 0:098463de4c5d 74
group-onsemi 0:098463de4c5d 75 //get PT clock frequency from SYS level
group-onsemi 0:098463de4c5d 76 ptClock = SYS_PT_GetFreq();
group-onsemi 0:098463de4c5d 77
group-onsemi 0:098463de4c5d 78 if(ptClock == 0)
group-onsemi 0:098463de4c5d 79 return E_UNINITIALIZED;
group-onsemi 0:098463de4c5d 80
group-onsemi 0:098463de4c5d 81 if(ptClock < (cfg->bps))
group-onsemi 0:098463de4c5d 82 return E_BAD_STATE;
group-onsemi 0:098463de4c5d 83
group-onsemi 0:098463de4c5d 84 rate = (ptClock / (cfg->bps));
group-onsemi 0:098463de4c5d 85
group-onsemi 0:098463de4c5d 86 pt->rate_length = ((rate << MXC_F_PT_RATE_LENGTH_RATE_CONTROL_POS)
group-onsemi 0:098463de4c5d 87 & MXC_F_PT_RATE_LENGTH_RATE_CONTROL) |
group-onsemi 0:098463de4c5d 88 ((cfg->ptLength << MXC_F_PT_RATE_LENGTH_MODE_POS)
group-onsemi 0:098463de4c5d 89 & MXC_F_PT_RATE_LENGTH_MODE);
group-onsemi 0:098463de4c5d 90
group-onsemi 0:098463de4c5d 91 pt->train = cfg->pattern;
group-onsemi 0:098463de4c5d 92 pt->loop = ((cfg->loop << MXC_F_PT_LOOP_COUNT_POS) & MXC_F_PT_LOOP_COUNT) |
group-onsemi 0:098463de4c5d 93 ((cfg->loopDelay << MXC_F_PT_LOOP_DELAY_POS) & MXC_F_PT_LOOP_DELAY);
group-onsemi 0:098463de4c5d 94
group-onsemi 0:098463de4c5d 95 return E_NO_ERROR;
group-onsemi 0:098463de4c5d 96 }
group-onsemi 0:098463de4c5d 97
group-onsemi 0:098463de4c5d 98 /******************************************************************************/
group-onsemi 0:098463de4c5d 99 int PT_SqrWaveConfig(mxc_pt_regs_t *pt, uint32_t freq, const sys_cfg_pt_t *sysCfg)
group-onsemi 0:098463de4c5d 100 {
group-onsemi 0:098463de4c5d 101 int err;
group-onsemi 0:098463de4c5d 102 uint32_t ptClock;
group-onsemi 0:098463de4c5d 103 uint32_t rate;
group-onsemi 0:098463de4c5d 104
group-onsemi 0:098463de4c5d 105 //check for valid base pointer
group-onsemi 0:098463de4c5d 106 MXC_ASSERT(MXC_PT_GET_IDX(pt) >= 0);
group-onsemi 0:098463de4c5d 107
group-onsemi 0:098463de4c5d 108 if(freq == 0)
group-onsemi 0:098463de4c5d 109 return E_BAD_PARAM;
group-onsemi 0:098463de4c5d 110
group-onsemi 0:098463de4c5d 111 //disable pulse train
group-onsemi 0:098463de4c5d 112 PT_Stop(pt);
group-onsemi 0:098463de4c5d 113
group-onsemi 0:098463de4c5d 114 //setup system GPIO configuration
group-onsemi 0:098463de4c5d 115 if((err = SYS_PT_Config(pt, sysCfg)) != E_NO_ERROR)
group-onsemi 0:098463de4c5d 116 return err;
group-onsemi 0:098463de4c5d 117
group-onsemi 0:098463de4c5d 118 //get PT clock frequency from SYS level
group-onsemi 0:098463de4c5d 119 ptClock = SYS_PT_GetFreq();
group-onsemi 0:098463de4c5d 120
group-onsemi 0:098463de4c5d 121 if(ptClock == 0)
group-onsemi 0:098463de4c5d 122 return E_UNINITIALIZED;
group-onsemi 0:098463de4c5d 123
group-onsemi 0:098463de4c5d 124 if(ptClock < (2*freq))
group-onsemi 0:098463de4c5d 125 return E_BAD_STATE;
group-onsemi 0:098463de4c5d 126
group-onsemi 0:098463de4c5d 127 rate = (ptClock / (2*freq)) + 1;
group-onsemi 0:098463de4c5d 128
group-onsemi 0:098463de4c5d 129 pt->rate_length = ((rate << MXC_F_PT_RATE_LENGTH_RATE_CONTROL_POS)
group-onsemi 0:098463de4c5d 130 & MXC_F_PT_RATE_LENGTH_RATE_CONTROL) |
group-onsemi 0:098463de4c5d 131 (MXC_V_PT_RATE_LENGTH_MODE_SQUARE_WAVE << MXC_F_PT_RATE_LENGTH_MODE_POS);
group-onsemi 0:098463de4c5d 132
group-onsemi 0:098463de4c5d 133 return E_NO_ERROR;
group-onsemi 0:098463de4c5d 134 }