MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_Atmel/TARGET_SAM_CortexM4/pwmout_api.c@18:6a4db94011d3, 2017-05-14 (annotated)

Committer:
sahilmgandhi
Date:
Sun May 14 23:18:57 2017 +0000
Revision:
18:6a4db94011d3
Publishing again

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 2 * Copyright (c) 2006-2015 ARM Limited
sahilmgandhi 18:6a4db94011d3 3 *
sahilmgandhi 18:6a4db94011d3 4 * Licensed under the Apache License, Version 2.0 (the "License");
sahilmgandhi 18:6a4db94011d3 5 * you may not use this file except in compliance with the License.
sahilmgandhi 18:6a4db94011d3 6 * You may obtain a copy of the License at
sahilmgandhi 18:6a4db94011d3 7 *
sahilmgandhi 18:6a4db94011d3 8 * http://www.apache.org/licenses/LICENSE-2.0
sahilmgandhi 18:6a4db94011d3 9 *
sahilmgandhi 18:6a4db94011d3 10 * Unless required by applicable law or agreed to in writing, software
sahilmgandhi 18:6a4db94011d3 11 * distributed under the License is distributed on an "AS IS" BASIS,
sahilmgandhi 18:6a4db94011d3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sahilmgandhi 18:6a4db94011d3 13 * See the License for the specific language governing permissions and
sahilmgandhi 18:6a4db94011d3 14 * limitations under the License.
sahilmgandhi 18:6a4db94011d3 15 */
sahilmgandhi 18:6a4db94011d3 16 #include "mbed_assert.h"
sahilmgandhi 18:6a4db94011d3 17 #include "pwmout_api.h"
sahilmgandhi 18:6a4db94011d3 18
sahilmgandhi 18:6a4db94011d3 19 #include "cmsis.h"
sahilmgandhi 18:6a4db94011d3 20 #include "tc.h"
sahilmgandhi 18:6a4db94011d3 21 #include "sysclk.h"
sahilmgandhi 18:6a4db94011d3 22 #include "PeripheralPins.h"
sahilmgandhi 18:6a4db94011d3 23
sahilmgandhi 18:6a4db94011d3 24 extern uint8_t g_sys_init;
sahilmgandhi 18:6a4db94011d3 25
sahilmgandhi 18:6a4db94011d3 26 /** Use TC Peripheral 0 **/
sahilmgandhi 18:6a4db94011d3 27 #define TC TC0
sahilmgandhi 18:6a4db94011d3 28
sahilmgandhi 18:6a4db94011d3 29 static const uint32_t tc_prescalar[] = {
sahilmgandhi 18:6a4db94011d3 30 TC_CMR_TCCLKS_TIMER_CLOCK1, // MCK/2
sahilmgandhi 18:6a4db94011d3 31 TC_CMR_TCCLKS_TIMER_CLOCK2, // MCK/8
sahilmgandhi 18:6a4db94011d3 32 TC_CMR_TCCLKS_TIMER_CLOCK3, // MCK/32
sahilmgandhi 18:6a4db94011d3 33 TC_CMR_TCCLKS_TIMER_CLOCK4, // MCK/128
sahilmgandhi 18:6a4db94011d3 34 };
sahilmgandhi 18:6a4db94011d3 35 static const uint32_t tc_prescalar_divider[] = {
sahilmgandhi 18:6a4db94011d3 36 2, // MCK/2
sahilmgandhi 18:6a4db94011d3 37 8, // MCK/8
sahilmgandhi 18:6a4db94011d3 38 32, // MCK/32
sahilmgandhi 18:6a4db94011d3 39 128 // MCK/128
sahilmgandhi 18:6a4db94011d3 40 };
sahilmgandhi 18:6a4db94011d3 41
sahilmgandhi 18:6a4db94011d3 42 uint32_t getpwmchannelid (uint32_t channel)
sahilmgandhi 18:6a4db94011d3 43 {
sahilmgandhi 18:6a4db94011d3 44 switch (channel) {
sahilmgandhi 18:6a4db94011d3 45 case 0 :
sahilmgandhi 18:6a4db94011d3 46 return ID_TC0;
sahilmgandhi 18:6a4db94011d3 47 case 1 :
sahilmgandhi 18:6a4db94011d3 48 return ID_TC1;
sahilmgandhi 18:6a4db94011d3 49 case 2 :
sahilmgandhi 18:6a4db94011d3 50 return ID_TC2;
sahilmgandhi 18:6a4db94011d3 51 default :
sahilmgandhi 18:6a4db94011d3 52 MBED_ASSERT(false);
sahilmgandhi 18:6a4db94011d3 53 break;
sahilmgandhi 18:6a4db94011d3 54 }
sahilmgandhi 18:6a4db94011d3 55 }
sahilmgandhi 18:6a4db94011d3 56
sahilmgandhi 18:6a4db94011d3 57 uint32_t getprescalarindex (uint16_t frequency)
sahilmgandhi 18:6a4db94011d3 58 {
sahilmgandhi 18:6a4db94011d3 59 float time_period_ms;
sahilmgandhi 18:6a4db94011d3 60 time_period_ms = (1.0 / (float)frequency) * 1000.0;
sahilmgandhi 18:6a4db94011d3 61 if (time_period_ms <= 1.0) {
sahilmgandhi 18:6a4db94011d3 62 return 0;
sahilmgandhi 18:6a4db94011d3 63 } else if ((time_period_ms > 1.0) && (time_period_ms <= 4.0)) {
sahilmgandhi 18:6a4db94011d3 64 return 1;
sahilmgandhi 18:6a4db94011d3 65 } else if ((time_period_ms > 4.0) && (time_period_ms <= 16.0)) {
sahilmgandhi 18:6a4db94011d3 66 return 2;
sahilmgandhi 18:6a4db94011d3 67 } else {
sahilmgandhi 18:6a4db94011d3 68 return 3;
sahilmgandhi 18:6a4db94011d3 69 }
sahilmgandhi 18:6a4db94011d3 70 }
sahilmgandhi 18:6a4db94011d3 71
sahilmgandhi 18:6a4db94011d3 72 static void setregisterabc (pwmout_t* obj)
sahilmgandhi 18:6a4db94011d3 73 {
sahilmgandhi 18:6a4db94011d3 74 uint32_t ra, rb, rc;
sahilmgandhi 18:6a4db94011d3 75 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 76 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 77
sahilmgandhi 18:6a4db94011d3 78 /* Configure waveform frequency and duty cycle. */
sahilmgandhi 18:6a4db94011d3 79 rc = (sysclk_get_peripheral_bus_hz(TC) /
sahilmgandhi 18:6a4db94011d3 80 tc_prescalar_divider[obj->prescalarindex] )/
sahilmgandhi 18:6a4db94011d3 81 obj->waveconfig.us_frequency;
sahilmgandhi 18:6a4db94011d3 82 tc_write_rc(TC, obj->channel, rc);
sahilmgandhi 18:6a4db94011d3 83 switch (obj->ioline) {
sahilmgandhi 18:6a4db94011d3 84 case 0 :
sahilmgandhi 18:6a4db94011d3 85 ra = (100 - obj->waveconfig.us_dutycycle) * rc / 100;
sahilmgandhi 18:6a4db94011d3 86 if(ra <= 0) ra = 1; /*non zero value only*/
sahilmgandhi 18:6a4db94011d3 87 tc_write_ra(TC, obj->channel, ra);
sahilmgandhi 18:6a4db94011d3 88 break;
sahilmgandhi 18:6a4db94011d3 89 case 1 :
sahilmgandhi 18:6a4db94011d3 90 rb = (100 - obj->waveconfig.us_dutycycle) * rc / 100;
sahilmgandhi 18:6a4db94011d3 91 if(rb <= 0) rb = 1; /*non zero value only*/
sahilmgandhi 18:6a4db94011d3 92 tc_write_rb(TC, obj->channel, rb);
sahilmgandhi 18:6a4db94011d3 93 break;
sahilmgandhi 18:6a4db94011d3 94 default :
sahilmgandhi 18:6a4db94011d3 95 MBED_ASSERT(false);
sahilmgandhi 18:6a4db94011d3 96 break;
sahilmgandhi 18:6a4db94011d3 97 }
sahilmgandhi 18:6a4db94011d3 98 }
sahilmgandhi 18:6a4db94011d3 99
sahilmgandhi 18:6a4db94011d3 100 void pwmout_inithw(pwmout_t* obj)
sahilmgandhi 18:6a4db94011d3 101 {
sahilmgandhi 18:6a4db94011d3 102 uint32_t mode = 0;
sahilmgandhi 18:6a4db94011d3 103 /* Configure the PMC to enable the TC module. */
sahilmgandhi 18:6a4db94011d3 104 sysclk_enable_peripheral_clock(getpwmchannelid(obj->channel));
sahilmgandhi 18:6a4db94011d3 105 #if SAMG55
sahilmgandhi 18:6a4db94011d3 106 /* Enable PCK output */
sahilmgandhi 18:6a4db94011d3 107 pmc_disable_pck(PMC_PCK_3);
sahilmgandhi 18:6a4db94011d3 108 pmc_switch_pck_to_mck(PMC_PCK_3, PMC_PCK_PRES_CLK_1);
sahilmgandhi 18:6a4db94011d3 109 pmc_enable_pck(PMC_PCK_3);
sahilmgandhi 18:6a4db94011d3 110 #endif
sahilmgandhi 18:6a4db94011d3 111 switch (obj->ioline) {
sahilmgandhi 18:6a4db94011d3 112 case 0 :
sahilmgandhi 18:6a4db94011d3 113 mode = TC_CMR_ACPA_SET | TC_CMR_ACPC_CLEAR; /* RA Compare Effect: set */ /* RC Compare Effect: clear */
sahilmgandhi 18:6a4db94011d3 114 break;
sahilmgandhi 18:6a4db94011d3 115 case 1 :
sahilmgandhi 18:6a4db94011d3 116 mode = TC_CMR_BCPB_SET | TC_CMR_BCPC_CLEAR | TC_CMR_ABETRG; /* RB Compare Effect: set */ /* RC Compare Effect: clear */ /*Change external event selection from TIOB*/
sahilmgandhi 18:6a4db94011d3 117 break;
sahilmgandhi 18:6a4db94011d3 118 default :
sahilmgandhi 18:6a4db94011d3 119 MBED_ASSERT(false);
sahilmgandhi 18:6a4db94011d3 120 break;
sahilmgandhi 18:6a4db94011d3 121 }
sahilmgandhi 18:6a4db94011d3 122 /* Disable TC TC_CHANNEL_WAVEFORM. */
sahilmgandhi 18:6a4db94011d3 123 tc_stop(TC, obj->channel);
sahilmgandhi 18:6a4db94011d3 124 /* Init TC to waveform mode. */
sahilmgandhi 18:6a4db94011d3 125 tc_init(TC, obj->channel,
sahilmgandhi 18:6a4db94011d3 126 /* Waveform Clock Selection */
sahilmgandhi 18:6a4db94011d3 127 obj->waveconfig.ul_intclock
sahilmgandhi 18:6a4db94011d3 128 | TC_CMR_WAVE /* Waveform mode is enabled */
sahilmgandhi 18:6a4db94011d3 129 | TC_CMR_CPCTRG /* UP mode with automatic trigger on RC Compare */
sahilmgandhi 18:6a4db94011d3 130 | mode
sahilmgandhi 18:6a4db94011d3 131 );
sahilmgandhi 18:6a4db94011d3 132 }
sahilmgandhi 18:6a4db94011d3 133
sahilmgandhi 18:6a4db94011d3 134 /** Initialize PWM Module
sahilmgandhi 18:6a4db94011d3 135 *
sahilmgandhi 18:6a4db94011d3 136 * @param[in][out] obj The PWM object to initialize
sahilmgandhi 18:6a4db94011d3 137 * @return void
sahilmgandhi 18:6a4db94011d3 138 */
sahilmgandhi 18:6a4db94011d3 139 void pwmout_init(pwmout_t* obj, PinName pin)
sahilmgandhi 18:6a4db94011d3 140 {
sahilmgandhi 18:6a4db94011d3 141 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 142 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 143 uint32_t ioline = NC;
sahilmgandhi 18:6a4db94011d3 144 uint32_t channel = NC;
sahilmgandhi 18:6a4db94011d3 145
sahilmgandhi 18:6a4db94011d3 146 if (g_sys_init == 0) {
sahilmgandhi 18:6a4db94011d3 147 sysclk_init();
sahilmgandhi 18:6a4db94011d3 148 system_board_init();
sahilmgandhi 18:6a4db94011d3 149 g_sys_init = 1;
sahilmgandhi 18:6a4db94011d3 150 }
sahilmgandhi 18:6a4db94011d3 151 if(pin != NC) {
sahilmgandhi 18:6a4db94011d3 152 pin_function(pin, pinmap_find_function(pin, PinMap_PWM));
sahilmgandhi 18:6a4db94011d3 153 ioport_disable_pin(pin);
sahilmgandhi 18:6a4db94011d3 154 }
sahilmgandhi 18:6a4db94011d3 155 obj->pin = pin;
sahilmgandhi 18:6a4db94011d3 156
sahilmgandhi 18:6a4db94011d3 157 ioline = pinmap_find_function(pin, PinMap_PWM_IO_Line); /*To find out which IO Line is associated with the pin and initialise accordingly*/ /*pinmap_find_function reused to find out iolin used*/
sahilmgandhi 18:6a4db94011d3 158 MBED_ASSERT(ioline != NC);
sahilmgandhi 18:6a4db94011d3 159 obj->ioline = ioline;
sahilmgandhi 18:6a4db94011d3 160
sahilmgandhi 18:6a4db94011d3 161 channel = pinmap_find_peripheral(pin, PinMap_PWM_IO_Line); /* PinMap_PWM_IO_Line contains channel number and ioline to be used*/ /*pinmap_find_peripheral function reused to find out channel number*/
sahilmgandhi 18:6a4db94011d3 162 MBED_ASSERT(channel != NC);
sahilmgandhi 18:6a4db94011d3 163 obj->channel = channel;
sahilmgandhi 18:6a4db94011d3 164 obj->waveconfig.us_frequency = 500;
sahilmgandhi 18:6a4db94011d3 165 obj->waveconfig.us_dutycycle = 50;
sahilmgandhi 18:6a4db94011d3 166
sahilmgandhi 18:6a4db94011d3 167 obj->prescalarindex = getprescalarindex(obj->waveconfig.us_frequency);
sahilmgandhi 18:6a4db94011d3 168 obj->waveconfig.ul_intclock = tc_prescalar[obj->prescalarindex];
sahilmgandhi 18:6a4db94011d3 169 pwmout_inithw(obj);
sahilmgandhi 18:6a4db94011d3 170
sahilmgandhi 18:6a4db94011d3 171 /*Set the registers a,b,c*/
sahilmgandhi 18:6a4db94011d3 172 setregisterabc(obj);
sahilmgandhi 18:6a4db94011d3 173
sahilmgandhi 18:6a4db94011d3 174 /* Enable TC TC_CHANNEL_WAVEFORM. */
sahilmgandhi 18:6a4db94011d3 175 tc_start(TC, channel);
sahilmgandhi 18:6a4db94011d3 176 }
sahilmgandhi 18:6a4db94011d3 177
sahilmgandhi 18:6a4db94011d3 178 /** Free the PWM Module
sahilmgandhi 18:6a4db94011d3 179 *
sahilmgandhi 18:6a4db94011d3 180 * @param[in] obj The PWM object to free
sahilmgandhi 18:6a4db94011d3 181 * @return void
sahilmgandhi 18:6a4db94011d3 182 */
sahilmgandhi 18:6a4db94011d3 183 void pwmout_free(pwmout_t* obj)
sahilmgandhi 18:6a4db94011d3 184 {
sahilmgandhi 18:6a4db94011d3 185 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 186 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 187 tc_stop(TC, obj->channel);
sahilmgandhi 18:6a4db94011d3 188 }
sahilmgandhi 18:6a4db94011d3 189
sahilmgandhi 18:6a4db94011d3 190 /** Set the duty cycle of PWM Waveform
sahilmgandhi 18:6a4db94011d3 191 *
sahilmgandhi 18:6a4db94011d3 192 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 193 * @param[in] value New duty cycle to be set
sahilmgandhi 18:6a4db94011d3 194 * @return void
sahilmgandhi 18:6a4db94011d3 195 */
sahilmgandhi 18:6a4db94011d3 196 void pwmout_write(pwmout_t* obj, float value)
sahilmgandhi 18:6a4db94011d3 197 {
sahilmgandhi 18:6a4db94011d3 198 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 199 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 200 if (value < 0.0f) {
sahilmgandhi 18:6a4db94011d3 201 value = 0;
sahilmgandhi 18:6a4db94011d3 202 } else if (value > 1.0f) {
sahilmgandhi 18:6a4db94011d3 203 value = 1;
sahilmgandhi 18:6a4db94011d3 204 }
sahilmgandhi 18:6a4db94011d3 205 obj->waveconfig.us_dutycycle = (uint16_t)(value * 100);
sahilmgandhi 18:6a4db94011d3 206 tc_stop(TC, obj->channel);
sahilmgandhi 18:6a4db94011d3 207
sahilmgandhi 18:6a4db94011d3 208 /*Set the registers a,b,c*/
sahilmgandhi 18:6a4db94011d3 209 setregisterabc(obj);
sahilmgandhi 18:6a4db94011d3 210
sahilmgandhi 18:6a4db94011d3 211 /* Enable TC TC_CHANNEL_WAVEFORM. */
sahilmgandhi 18:6a4db94011d3 212 tc_start(TC, obj->channel);
sahilmgandhi 18:6a4db94011d3 213 }
sahilmgandhi 18:6a4db94011d3 214
sahilmgandhi 18:6a4db94011d3 215 /** Get the duty cycle of PWM Waveform
sahilmgandhi 18:6a4db94011d3 216 *
sahilmgandhi 18:6a4db94011d3 217 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 218 * @return Current duty cycle
sahilmgandhi 18:6a4db94011d3 219 */
sahilmgandhi 18:6a4db94011d3 220 float pwmout_read(pwmout_t* obj)
sahilmgandhi 18:6a4db94011d3 221 {
sahilmgandhi 18:6a4db94011d3 222 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 223 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 224 return (obj->waveconfig.us_dutycycle / 100.0);
sahilmgandhi 18:6a4db94011d3 225 }
sahilmgandhi 18:6a4db94011d3 226
sahilmgandhi 18:6a4db94011d3 227 /** Set the period of PWM Waveform
sahilmgandhi 18:6a4db94011d3 228 *
sahilmgandhi 18:6a4db94011d3 229 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 230 * @param[in] seconds New period in seconds
sahilmgandhi 18:6a4db94011d3 231 * @return void
sahilmgandhi 18:6a4db94011d3 232 */
sahilmgandhi 18:6a4db94011d3 233 void pwmout_period(pwmout_t* obj, float seconds)
sahilmgandhi 18:6a4db94011d3 234 {
sahilmgandhi 18:6a4db94011d3 235 pwmout_period_us(obj, seconds * 1000000.0f);
sahilmgandhi 18:6a4db94011d3 236 }
sahilmgandhi 18:6a4db94011d3 237
sahilmgandhi 18:6a4db94011d3 238 /** Set the period of PWM Waveform
sahilmgandhi 18:6a4db94011d3 239 *
sahilmgandhi 18:6a4db94011d3 240 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 241 * @param[in] value New period in milliseconds
sahilmgandhi 18:6a4db94011d3 242 * @return void
sahilmgandhi 18:6a4db94011d3 243 */
sahilmgandhi 18:6a4db94011d3 244 void pwmout_period_ms(pwmout_t* obj, int ms)
sahilmgandhi 18:6a4db94011d3 245 {
sahilmgandhi 18:6a4db94011d3 246 pwmout_period_us(obj, ms * 1000);
sahilmgandhi 18:6a4db94011d3 247 }
sahilmgandhi 18:6a4db94011d3 248
sahilmgandhi 18:6a4db94011d3 249 /** Set the period of PWM Waveform
sahilmgandhi 18:6a4db94011d3 250 *
sahilmgandhi 18:6a4db94011d3 251 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 252 * @param[in] us New period in microseconds
sahilmgandhi 18:6a4db94011d3 253 * @return void
sahilmgandhi 18:6a4db94011d3 254 */
sahilmgandhi 18:6a4db94011d3 255 void pwmout_period_us(pwmout_t* obj, int us)
sahilmgandhi 18:6a4db94011d3 256 {
sahilmgandhi 18:6a4db94011d3 257 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 258 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 259 float freq = ( 1.0 / us ) * 1000000.0;
sahilmgandhi 18:6a4db94011d3 260
sahilmgandhi 18:6a4db94011d3 261 obj->waveconfig.us_frequency = (uint16_t) freq;
sahilmgandhi 18:6a4db94011d3 262 obj->prescalarindex = getprescalarindex(obj->waveconfig.us_frequency);
sahilmgandhi 18:6a4db94011d3 263 obj->waveconfig.ul_intclock = tc_prescalar[obj->prescalarindex];
sahilmgandhi 18:6a4db94011d3 264 pwmout_inithw(obj);
sahilmgandhi 18:6a4db94011d3 265
sahilmgandhi 18:6a4db94011d3 266 /*Set the registers a,b,c*/
sahilmgandhi 18:6a4db94011d3 267 setregisterabc(obj);
sahilmgandhi 18:6a4db94011d3 268
sahilmgandhi 18:6a4db94011d3 269 /* Enable TC TC_CHANNEL_WAVEFORM. */
sahilmgandhi 18:6a4db94011d3 270 tc_start(TC, obj->channel);
sahilmgandhi 18:6a4db94011d3 271 }
sahilmgandhi 18:6a4db94011d3 272
sahilmgandhi 18:6a4db94011d3 273 /** Set the pulse width of PWM Waveform
sahilmgandhi 18:6a4db94011d3 274 *
sahilmgandhi 18:6a4db94011d3 275 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 276 * @param[in] seconds New pulse width in seconds
sahilmgandhi 18:6a4db94011d3 277 * @return void
sahilmgandhi 18:6a4db94011d3 278 */
sahilmgandhi 18:6a4db94011d3 279 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
sahilmgandhi 18:6a4db94011d3 280 {
sahilmgandhi 18:6a4db94011d3 281 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
sahilmgandhi 18:6a4db94011d3 282 }
sahilmgandhi 18:6a4db94011d3 283
sahilmgandhi 18:6a4db94011d3 284 /** Set the pulse width of PWM Waveform
sahilmgandhi 18:6a4db94011d3 285 *
sahilmgandhi 18:6a4db94011d3 286 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 287 * @param[in] ms New pulse width in milliseconds
sahilmgandhi 18:6a4db94011d3 288 * @return void
sahilmgandhi 18:6a4db94011d3 289 */
sahilmgandhi 18:6a4db94011d3 290 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
sahilmgandhi 18:6a4db94011d3 291 {
sahilmgandhi 18:6a4db94011d3 292 pwmout_pulsewidth_us(obj, ms * 1000);
sahilmgandhi 18:6a4db94011d3 293 }
sahilmgandhi 18:6a4db94011d3 294
sahilmgandhi 18:6a4db94011d3 295 /** Set the pulse width of PWM Waveform
sahilmgandhi 18:6a4db94011d3 296 *
sahilmgandhi 18:6a4db94011d3 297 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 298 * @param[in] us New pulse width in microseconds
sahilmgandhi 18:6a4db94011d3 299 * @return void
sahilmgandhi 18:6a4db94011d3 300 */
sahilmgandhi 18:6a4db94011d3 301 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
sahilmgandhi 18:6a4db94011d3 302 {
sahilmgandhi 18:6a4db94011d3 303 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 304 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 305 float new_duty = (us / 1000000.0) * (float)obj->waveconfig.us_frequency;
sahilmgandhi 18:6a4db94011d3 306 pwmout_write(obj, new_duty);
sahilmgandhi 18:6a4db94011d3 307 }