Maxim mbed development library
Dependents: MAX34417_demo MAXREFDES1265 MAXREFDES1265
Fork of mbed-dev by
Diff: targets/TARGET_Maxim/TARGET_MAX32630/mxc/pt.c
- Revision:
- 157:ff67d9f36b67
diff -r 95d6b41a828b -r ff67d9f36b67 targets/TARGET_Maxim/TARGET_MAX32630/mxc/pt.c --- /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*/