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mbed-os/targets/TARGET_Maxim/TARGET_MAX32625/mxc/tmr.c

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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: 2016-03-11 11:46:37 -0600 (Fri, 11 Mar 2016) $
* $Revision: 21839 $
*
******************************************************************************/
#include <stddef.h>
#include "mxc_assert.h"
#include "tmr.h"
static tmr_prescale_t prescaler[MXC_CFG_TMR_INSTANCES];
/******************************************************************************/
int TMR_Init(mxc_tmr_regs_t *tmr, tmr_prescale_t prescale, const sys_cfg_tmr_t *sysCfg)
{
int err;
int tmrNum;
//get the timer number
tmrNum = MXC_TMR_GET_IDX(tmr);
//check for valid pointer
MXC_ASSERT(tmrNum >= 0);
//steup system GPIO config
if((err = SYS_TMR_Init(tmr, sysCfg)) != E_NO_ERROR)
return err;
//save the prescale value for this timer
prescaler[tmrNum] = prescale;
//Disable timer and clear settings
tmr->ctrl = 0;
//reset all counts to 0
tmr->count32 = 0;
tmr->count16_0 = 0;
tmr->count16_1 = 0;
// Clear interrupt flag
tmr->intfl = MXC_F_TMR_INTFL_TIMER0 | MXC_F_TMR_INTFL_TIMER1;
return E_NO_ERROR;
}
/******************************************************************************/
void TMR32_Config(mxc_tmr_regs_t *tmr, const tmr32_cfg_t *config)
{
//stop timer
TMR32_Stop(tmr);
//setup timer configuration register
//clear tmr2x16 (32bit mode), mode and polarity bits
tmr->ctrl &= ~(MXC_F_TMR_CTRL_TMR2X16 | MXC_F_TMR_CTRL_MODE |
MXC_F_TMR_CTRL_POLARITY);
//set mode and polarity
tmr->ctrl |= ((config->mode << MXC_F_TMR_CTRL_MODE_POS) |
(config->polarity << MXC_F_TMR_CTRL_POLARITY_POS));
//setup timer Tick registers
tmr->term_cnt32 = config->compareCount;
return;
}
/******************************************************************************/
void TMR32_PWMConfig(mxc_tmr_regs_t *tmr, const tmr32_cfg_pwm_t *config)
{
//stop timer
TMR32_Stop(tmr);
//setup timer configuration register
//clear tmr2x16 (32bit mode), mode and polarity bits
tmr->ctrl &= ~(MXC_F_TMR_CTRL_TMR2X16 | MXC_F_TMR_CTRL_MODE |
MXC_F_TMR_CTRL_POLARITY);
//set mode and polarity
tmr->ctrl |= ((TMR32_MODE_PWM << MXC_F_TMR_CTRL_MODE_POS) |
(config->polarity << MXC_F_TMR_CTRL_POLARITY_POS));
tmr->pwm_cap32 = config->dutyCount;
//setup timer Tick registers
tmr->count32 = 0;
tmr->term_cnt32 = config->periodCount;
return;
}
/******************************************************************************/
void TMR16_Config(mxc_tmr_regs_t *tmr, uint8_t index, const tmr16_cfg_t *config)
{
//stop timer
TMR16_Stop(tmr, index);
if(index > 0) { //configure timer 16_1
//setup timer configuration register
tmr->ctrl |= MXC_F_TMR_CTRL_TMR2X16; //1 = 16bit mode
//set mode
if(config->mode)
tmr->ctrl |= MXC_F_TMR_CTRL_MODE_16_1;
else
tmr->ctrl &= ~MXC_F_TMR_CTRL_MODE_16_1;
//setup timer Ticks registers
tmr->term_cnt16_1 = config->compareCount;
} else { //configure timer 16_0
//setup timer configuration register
tmr->ctrl |= MXC_F_TMR_CTRL_TMR2X16; //1 = 16bit mode
//set mode
if(config->mode)
tmr->ctrl |= MXC_F_TMR_CTRL_MODE_16_0;
else
tmr->ctrl &= ~MXC_F_TMR_CTRL_MODE_16_0;
//setup timer Ticks registers
tmr->term_cnt16_0 = config->compareCount;
}
return;
}
/******************************************************************************/
void TMR32_Start(mxc_tmr_regs_t *tmr)
{
int tmrNum;
uint32_t ctrl;
//get the timer number
tmrNum = MXC_TMR_GET_IDX(tmr);
//prescaler gets reset to 0 when timer is disabled
//set the prescale to the saved value for this timer
ctrl = tmr->ctrl;
ctrl &= ~(MXC_F_TMR_CTRL_PRESCALE); //clear prescaler bits
ctrl |= prescaler[tmrNum] << MXC_F_TMR_CTRL_PRESCALE_POS; //set prescaler
ctrl |= MXC_F_TMR_CTRL_ENABLE0; //set enable to start the timer
tmr->ctrl = ctrl;
return;
}
/******************************************************************************/
void TMR16_Start(mxc_tmr_regs_t *tmr, uint8_t index)
{
int tmrNum;
uint32_t ctrl;
//get the timer number
tmrNum = MXC_TMR_GET_IDX(tmr);
ctrl = tmr->ctrl;
//prescaler gets reset to 0 when both 16 bit timers are disabled
//set the prescale to the saved value for this timer if is is not already set
if((ctrl & MXC_F_TMR_CTRL_PRESCALE) != ((uint32_t)prescaler[tmrNum] << MXC_F_TMR_CTRL_PRESCALE_POS)) {
ctrl &= ~(MXC_F_TMR_CTRL_PRESCALE); //clear prescaler bits
ctrl |= prescaler[tmrNum] << MXC_F_TMR_CTRL_PRESCALE_POS; //set prescaler
}
if(index > 0)
ctrl |= MXC_F_TMR_CTRL_ENABLE1; //start timer 16_1
else
ctrl |= MXC_F_TMR_CTRL_ENABLE0; //start timer 16_0
tmr->ctrl = ctrl;
return;
}
/******************************************************************************/
uint32_t TMR_GetPrescaler(mxc_tmr_regs_t *tmr)
{
int tmrNum;
//get the timer number
tmrNum = MXC_TMR_GET_IDX(tmr);
return ((uint32_t)prescaler[tmrNum]);
}
/******************************************************************************/
int TMR32_GetPWMTicks(mxc_tmr_regs_t *tmr, uint8_t dutyPercent, uint32_t freq, uint32_t *dutyTicks, uint32_t *periodTicks)
{
uint32_t timerClock;
uint32_t prescale;
uint64_t ticks;
if(dutyPercent > 100)
return E_BAD_PARAM;
if(freq == 0)
return E_BAD_PARAM;
timerClock = SYS_TMR_GetFreq(tmr);
prescale = TMR_GetPrescaler(tmr);
if(timerClock == 0 || prescale > TMR_PRESCALE_DIV_2_12)
return E_UNINITIALIZED;
ticks = timerClock / (1 << (prescale & 0xF)) / freq;
//make sure ticks is within a 32 bit value
if (!(ticks & 0xffffffff00000000) && (ticks & 0xffffffff)) {
*periodTicks = ticks;
*dutyTicks = ((uint64_t)*periodTicks * dutyPercent) / 100;
return E_NO_ERROR;
}
return E_INVALID;
}
/******************************************************************************/
int TMR32_TimeToTicks(mxc_tmr_regs_t *tmr, uint32_t time, tmr_unit_t units, uint32_t *ticks)
{
uint32_t unit_div0, unit_div1;
uint32_t timerClock;
uint32_t prescale;
uint64_t temp_ticks;
timerClock = SYS_TMR_GetFreq(tmr);
prescale = TMR_GetPrescaler(tmr);
if(timerClock == 0 || prescale > TMR_PRESCALE_DIV_2_12)
return E_UNINITIALIZED;
switch (units) {
case TMR_UNIT_NANOSEC:
unit_div0 = 1000000;
unit_div1 = 1000;
break;
case TMR_UNIT_MICROSEC:
unit_div0 = 1000;
unit_div1 = 1000;
break;
case TMR_UNIT_MILLISEC:
unit_div0 = 1;
unit_div1 = 1000;
break;
case TMR_UNIT_SEC:
unit_div0 = 1;
unit_div1 = 1;
break;
default:
return E_BAD_PARAM;
}
temp_ticks = (uint64_t)time * (timerClock / unit_div0) / (unit_div1 * (1 << (prescale & 0xF)));
//make sure ticks is within a 32 bit value
if (!(temp_ticks & 0xffffffff00000000) && (temp_ticks & 0xffffffff)) {
*ticks = temp_ticks;
return E_NO_ERROR;
}
return E_INVALID;
}
/******************************************************************************/
int TMR16_TimeToTicks(mxc_tmr_regs_t *tmr, uint32_t time, tmr_unit_t units, uint16_t *ticks)
{
uint32_t unit_div0, unit_div1;
uint32_t timerClock;
uint32_t prescale;
uint64_t temp_ticks;
timerClock = SYS_TMR_GetFreq(tmr);
prescale = TMR_GetPrescaler(tmr);
if(timerClock == 0 || prescale > TMR_PRESCALE_DIV_2_12)
return E_UNINITIALIZED;
switch (units) {
case TMR_UNIT_NANOSEC:
unit_div0 = 1000000;
unit_div1 = 1000;
break;
case TMR_UNIT_MICROSEC:
unit_div0 = 1000;
unit_div1 = 1000;
break;
case TMR_UNIT_MILLISEC:
unit_div0 = 1;
unit_div1 = 1000;
break;
case TMR_UNIT_SEC:
unit_div0 = 1;
unit_div1 = 1;
break;
default:
return E_BAD_PARAM;
}
temp_ticks = (uint64_t)time * (timerClock / unit_div0) / (unit_div1 * (1 << (prescale & 0xF)));
//make sure ticks is within a 32 bit value
if (!(temp_ticks & 0xffffffffffff0000) && (temp_ticks & 0xffff)) {
*ticks = temp_ticks;
return E_NO_ERROR;
}
return E_INVALID;
}
/******************************************************************************/
int TMR_TicksToTime(mxc_tmr_regs_t *tmr, uint32_t ticks, uint32_t *time, tmr_unit_t *units)
{
uint64_t temp_time = 0;
uint32_t timerClock = SYS_TMR_GetFreq(tmr);
uint32_t prescale = TMR_GetPrescaler(tmr);
if(timerClock == 0 || prescale > TMR_PRESCALE_DIV_2_12)
return E_UNINITIALIZED;
tmr_unit_t temp_unit = TMR_UNIT_NANOSEC;
temp_time = (uint64_t)ticks * 1000 * (1 << (prescale & 0xF)) / (timerClock / 1000000);
if (!(temp_time & 0xffffffff00000000)) {
*time = temp_time;
*units = temp_unit;
return E_NO_ERROR;
}
temp_unit = TMR_UNIT_MICROSEC;
temp_time = (uint64_t)ticks * 1000 * (1 << (prescale & 0xF)) / (timerClock / 1000);
if (!(temp_time & 0xffffffff00000000)) {
*time = temp_time;
*units = temp_unit;
return E_NO_ERROR;
}
temp_unit = TMR_UNIT_MILLISEC;
temp_time = (uint64_t)ticks * 1000 * (1 << (prescale & 0xF)) / timerClock;
if (!(temp_time & 0xffffffff00000000)) {
*time = temp_time;
*units = temp_unit;
return E_NO_ERROR;
}
temp_unit = TMR_UNIT_SEC;
temp_time = (uint64_t)ticks * (1 << (prescale & 0xF)) / timerClock;
if (!(temp_time & 0xffffffff00000000)) {
*time = temp_time;
*units = temp_unit;
return E_NO_ERROR;
}
return E_INVALID;
}
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