MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_Atmel/TARGET_SAM_CortexM0P/pwmout_api.c@46:b156ef445742, 2017-06-03 (annotated)

Committer:
sahilmgandhi
Date:
Sat Jun 03 00:22:44 2017 +0000
Revision:
46:b156ef445742
Parent:
18:6a4db94011d3 
Final code for internal battlebot competition.

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
sahilmgandhi 18:6a4db94011d3 21 #include "pinmap_function.h"
sahilmgandhi 18:6a4db94011d3 22
sahilmgandhi 18:6a4db94011d3 23 /* Prescaler values for TCC Module */
sahilmgandhi 18:6a4db94011d3 24 const uint32_t tcc_prescaler[] = {
sahilmgandhi 18:6a4db94011d3 25 TCC_CLOCK_PRESCALER_DIV1,
sahilmgandhi 18:6a4db94011d3 26 TCC_CLOCK_PRESCALER_DIV2,
sahilmgandhi 18:6a4db94011d3 27 TCC_CLOCK_PRESCALER_DIV4,
sahilmgandhi 18:6a4db94011d3 28 TCC_CLOCK_PRESCALER_DIV8,
sahilmgandhi 18:6a4db94011d3 29 TCC_CLOCK_PRESCALER_DIV16,
sahilmgandhi 18:6a4db94011d3 30 TCC_CLOCK_PRESCALER_DIV64,
sahilmgandhi 18:6a4db94011d3 31 TCC_CLOCK_PRESCALER_DIV256,
sahilmgandhi 18:6a4db94011d3 32 TCC_CLOCK_PRESCALER_DIV1024
sahilmgandhi 18:6a4db94011d3 33 };
sahilmgandhi 18:6a4db94011d3 34
sahilmgandhi 18:6a4db94011d3 35 /* Max count limits of TCC Modules */
sahilmgandhi 18:6a4db94011d3 36 extern const uint32_t _tcc_maxs[TCC_INST_NUM];
sahilmgandhi 18:6a4db94011d3 37
sahilmgandhi 18:6a4db94011d3 38 /** Set the period of PWM object (will not update the waveform)
sahilmgandhi 18:6a4db94011d3 39 *
sahilmgandhi 18:6a4db94011d3 40 * @param[in] obj The PWM object whose period is to be updated
sahilmgandhi 18:6a4db94011d3 41 * @param[in] period_us Period in microseconds
sahilmgandhi 18:6a4db94011d3 42 * @return void
sahilmgandhi 18:6a4db94011d3 43 */
sahilmgandhi 18:6a4db94011d3 44 static void pwmout_set_period(pwmout_t* obj, int period_us)
sahilmgandhi 18:6a4db94011d3 45 {
sahilmgandhi 18:6a4db94011d3 46 uint8_t i;
sahilmgandhi 18:6a4db94011d3 47 uint32_t freq_hz;
sahilmgandhi 18:6a4db94011d3 48 uint32_t div_freq;
sahilmgandhi 18:6a4db94011d3 49 double us_per_cycle;
sahilmgandhi 18:6a4db94011d3 50 uint64_t max_period = 0;
sahilmgandhi 18:6a4db94011d3 51 uint32_t us_period = period_us;
sahilmgandhi 18:6a4db94011d3 52
sahilmgandhi 18:6a4db94011d3 53 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 54 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 55
sahilmgandhi 18:6a4db94011d3 56 /* TCC instance index */
sahilmgandhi 18:6a4db94011d3 57 uint8_t module_index = _tcc_get_inst_index(obj->tcc.hw);
sahilmgandhi 18:6a4db94011d3 58
sahilmgandhi 18:6a4db94011d3 59 uint32_t count_max = _tcc_maxs[module_index];
sahilmgandhi 18:6a4db94011d3 60
sahilmgandhi 18:6a4db94011d3 61 freq_hz = system_gclk_gen_get_hz(obj->clock_source);
sahilmgandhi 18:6a4db94011d3 62
sahilmgandhi 18:6a4db94011d3 63 for (i=0; i<sizeof(tcc_prescaler); i++) {
sahilmgandhi 18:6a4db94011d3 64 div_freq = freq_hz >> tcc_prescaler[i];
sahilmgandhi 18:6a4db94011d3 65 if (!div_freq) break;
sahilmgandhi 18:6a4db94011d3 66 us_per_cycle = 1000000.00 / div_freq;
sahilmgandhi 18:6a4db94011d3 67 max_period = us_per_cycle * count_max;
sahilmgandhi 18:6a4db94011d3 68 if (max_period >= us_period) {
sahilmgandhi 18:6a4db94011d3 69 obj->clock_prescaler = (enum tc_clock_prescaler)tcc_prescaler[i];
sahilmgandhi 18:6a4db94011d3 70 obj->period = us_period / us_per_cycle;
sahilmgandhi 18:6a4db94011d3 71 obj->us_per_cycle = us_per_cycle;
sahilmgandhi 18:6a4db94011d3 72 break;
sahilmgandhi 18:6a4db94011d3 73 }
sahilmgandhi 18:6a4db94011d3 74 }
sahilmgandhi 18:6a4db94011d3 75 }
sahilmgandhi 18:6a4db94011d3 76
sahilmgandhi 18:6a4db94011d3 77 /** Initialize PWM Module with updated values
sahilmgandhi 18:6a4db94011d3 78 *
sahilmgandhi 18:6a4db94011d3 79 * @param[in][out] obj The PWM object to initialize
sahilmgandhi 18:6a4db94011d3 80 * @return non-zero if success
sahilmgandhi 18:6a4db94011d3 81 */
sahilmgandhi 18:6a4db94011d3 82 bool pwmout_init_hw(pwmout_t* obj)
sahilmgandhi 18:6a4db94011d3 83 {
sahilmgandhi 18:6a4db94011d3 84 uint32_t mux_func = (uint32_t)NC;
sahilmgandhi 18:6a4db94011d3 85 uint32_t pwm = (uint32_t)NC;
sahilmgandhi 18:6a4db94011d3 86 PinName pin;
sahilmgandhi 18:6a4db94011d3 87 uint32_t ch_index = (uint32_t)NC;
sahilmgandhi 18:6a4db94011d3 88 struct tcc_config config_tcc;
sahilmgandhi 18:6a4db94011d3 89 uint32_t tcc_channel = (uint32_t)NC;
sahilmgandhi 18:6a4db94011d3 90
sahilmgandhi 18:6a4db94011d3 91 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 92 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 93
sahilmgandhi 18:6a4db94011d3 94 pin = obj->pin;
sahilmgandhi 18:6a4db94011d3 95 pwm = pinmap_peripheral(pin, PinMap_PWM);
sahilmgandhi 18:6a4db94011d3 96 if (pwm == (uint32_t)NC) return 0; /* Pin not supported */
sahilmgandhi 18:6a4db94011d3 97
sahilmgandhi 18:6a4db94011d3 98 mux_func = pinmap_function(pin, PinMap_PWM);
sahilmgandhi 18:6a4db94011d3 99 ch_index = pinmap_channel_pwm(pin, (PWMName) pwm);
sahilmgandhi 18:6a4db94011d3 100 if ((mux_func == (uint32_t)NC) || (ch_index == (uint32_t)NC)) {
sahilmgandhi 18:6a4db94011d3 101 /* Pin not supported */
sahilmgandhi 18:6a4db94011d3 102 return 0;
sahilmgandhi 18:6a4db94011d3 103 }
sahilmgandhi 18:6a4db94011d3 104 if ((ch_index == 0) || (ch_index == 4)) {
sahilmgandhi 18:6a4db94011d3 105 tcc_channel = 0;
sahilmgandhi 18:6a4db94011d3 106 } else if ((ch_index == 1) || (ch_index == 5)) {
sahilmgandhi 18:6a4db94011d3 107 tcc_channel = 1;
sahilmgandhi 18:6a4db94011d3 108 } else if ((ch_index == 2) || (ch_index == 6)) {
sahilmgandhi 18:6a4db94011d3 109 tcc_channel = 2;
sahilmgandhi 18:6a4db94011d3 110 } else if ((ch_index == 3) || (ch_index == 7)) {
sahilmgandhi 18:6a4db94011d3 111 tcc_channel = 3;
sahilmgandhi 18:6a4db94011d3 112 }
sahilmgandhi 18:6a4db94011d3 113
sahilmgandhi 18:6a4db94011d3 114 tcc_get_config_defaults(&config_tcc, (Tcc*)pwm);
sahilmgandhi 18:6a4db94011d3 115
sahilmgandhi 18:6a4db94011d3 116 config_tcc.counter.clock_source = obj->clock_source;
sahilmgandhi 18:6a4db94011d3 117 config_tcc.counter.clock_prescaler = (enum tcc_clock_prescaler)obj->clock_prescaler;
sahilmgandhi 18:6a4db94011d3 118
sahilmgandhi 18:6a4db94011d3 119 config_tcc.counter.period = obj->period;
sahilmgandhi 18:6a4db94011d3 120 config_tcc.compare.wave_generation = TCC_WAVE_GENERATION_SINGLE_SLOPE_PWM;
sahilmgandhi 18:6a4db94011d3 121 config_tcc.compare.match[tcc_channel] = obj->period * obj->duty_cycle;
sahilmgandhi 18:6a4db94011d3 122
sahilmgandhi 18:6a4db94011d3 123 config_tcc.pins.enable_wave_out_pin[ch_index] = true;
sahilmgandhi 18:6a4db94011d3 124 config_tcc.pins.wave_out_pin[ch_index] = pin;
sahilmgandhi 18:6a4db94011d3 125 config_tcc.pins.wave_out_pin_mux[ch_index] = mux_func;
sahilmgandhi 18:6a4db94011d3 126
sahilmgandhi 18:6a4db94011d3 127 return (STATUS_OK == tcc_init(&obj->tcc, (Tcc*)pwm, &config_tcc));
sahilmgandhi 18:6a4db94011d3 128
sahilmgandhi 18:6a4db94011d3 129 }
sahilmgandhi 18:6a4db94011d3 130
sahilmgandhi 18:6a4db94011d3 131 /** Initialize PWM Module
sahilmgandhi 18:6a4db94011d3 132 *
sahilmgandhi 18:6a4db94011d3 133 * @param[in][out] obj The PWM object to initialize
sahilmgandhi 18:6a4db94011d3 134 * @return void
sahilmgandhi 18:6a4db94011d3 135 */
sahilmgandhi 18:6a4db94011d3 136 void pwmout_init(pwmout_t* obj, PinName pin)
sahilmgandhi 18:6a4db94011d3 137 {
sahilmgandhi 18:6a4db94011d3 138 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 139 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 140
sahilmgandhi 18:6a4db94011d3 141 if ((uint32_t)NC == pinmap_peripheral(pin, PinMap_PWM)) {
sahilmgandhi 18:6a4db94011d3 142 /* Pin not supported */
sahilmgandhi 18:6a4db94011d3 143 return;
sahilmgandhi 18:6a4db94011d3 144 }
sahilmgandhi 18:6a4db94011d3 145
sahilmgandhi 18:6a4db94011d3 146 obj->pin = pin;
sahilmgandhi 18:6a4db94011d3 147 obj->period = 0xFFFF;
sahilmgandhi 18:6a4db94011d3 148 obj->duty_cycle = 1;
sahilmgandhi 18:6a4db94011d3 149 obj->clock_source = GCLK_GENERATOR_0; /* 8Mhz input clock */
sahilmgandhi 18:6a4db94011d3 150 obj->clock_prescaler = (enum tc_clock_prescaler)TCC_CLOCK_PRESCALER_DIV8; /* Default to 1MHz for 8Mhz input clock */
sahilmgandhi 18:6a4db94011d3 151
sahilmgandhi 18:6a4db94011d3 152 /* Update the changes */
sahilmgandhi 18:6a4db94011d3 153 if (pwmout_init_hw(obj)) {
sahilmgandhi 18:6a4db94011d3 154 /* Enable PWM Module */
sahilmgandhi 18:6a4db94011d3 155 tcc_enable(&obj->tcc);
sahilmgandhi 18:6a4db94011d3 156 }
sahilmgandhi 18:6a4db94011d3 157
sahilmgandhi 18:6a4db94011d3 158 }
sahilmgandhi 18:6a4db94011d3 159
sahilmgandhi 18:6a4db94011d3 160 /** Free the PWM Module
sahilmgandhi 18:6a4db94011d3 161 *
sahilmgandhi 18:6a4db94011d3 162 * @param[in] obj The PWM object to free
sahilmgandhi 18:6a4db94011d3 163 * @return void
sahilmgandhi 18:6a4db94011d3 164 */
sahilmgandhi 18:6a4db94011d3 165 void pwmout_free(pwmout_t* obj)
sahilmgandhi 18:6a4db94011d3 166 {
sahilmgandhi 18:6a4db94011d3 167 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 168 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 169
sahilmgandhi 18:6a4db94011d3 170 tcc_disable(&obj->tcc);
sahilmgandhi 18:6a4db94011d3 171 }
sahilmgandhi 18:6a4db94011d3 172
sahilmgandhi 18:6a4db94011d3 173 /** Set the duty cycle of PWM Waveform
sahilmgandhi 18:6a4db94011d3 174 *
sahilmgandhi 18:6a4db94011d3 175 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 176 * @param[in] value New duty cycle to be set
sahilmgandhi 18:6a4db94011d3 177 * @return void
sahilmgandhi 18:6a4db94011d3 178 */
sahilmgandhi 18:6a4db94011d3 179 void pwmout_write(pwmout_t* obj, float value)
sahilmgandhi 18:6a4db94011d3 180 {
sahilmgandhi 18:6a4db94011d3 181 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 182 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 183
sahilmgandhi 18:6a4db94011d3 184 if (value < 0.0f) {
sahilmgandhi 18:6a4db94011d3 185 value = 0;
sahilmgandhi 18:6a4db94011d3 186 } else if (value > 1.0f) {
sahilmgandhi 18:6a4db94011d3 187 value = 1;
sahilmgandhi 18:6a4db94011d3 188 }
sahilmgandhi 18:6a4db94011d3 189
sahilmgandhi 18:6a4db94011d3 190 /* Modify the pulse width keeping period same */
sahilmgandhi 18:6a4db94011d3 191 obj->duty_cycle = value;
sahilmgandhi 18:6a4db94011d3 192
sahilmgandhi 18:6a4db94011d3 193 /* Disable PWM Module */
sahilmgandhi 18:6a4db94011d3 194 tcc_disable(&obj->tcc);
sahilmgandhi 18:6a4db94011d3 195
sahilmgandhi 18:6a4db94011d3 196 /* Update the changes */
sahilmgandhi 18:6a4db94011d3 197 if (pwmout_init_hw(obj)) {
sahilmgandhi 18:6a4db94011d3 198 /* Enable PWM Module */
sahilmgandhi 18:6a4db94011d3 199 tcc_enable(&obj->tcc);
sahilmgandhi 18:6a4db94011d3 200 }
sahilmgandhi 18:6a4db94011d3 201 }
sahilmgandhi 18:6a4db94011d3 202
sahilmgandhi 18:6a4db94011d3 203 /** Get the duty cycle of PWM Waveform
sahilmgandhi 18:6a4db94011d3 204 *
sahilmgandhi 18:6a4db94011d3 205 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 206 * @return Current duty cycle
sahilmgandhi 18:6a4db94011d3 207 */
sahilmgandhi 18:6a4db94011d3 208 float pwmout_read(pwmout_t* obj)
sahilmgandhi 18:6a4db94011d3 209 {
sahilmgandhi 18:6a4db94011d3 210 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 211 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 212
sahilmgandhi 18:6a4db94011d3 213 return obj->duty_cycle;
sahilmgandhi 18:6a4db94011d3 214 }
sahilmgandhi 18:6a4db94011d3 215
sahilmgandhi 18:6a4db94011d3 216 /** Set the period of PWM Waveform
sahilmgandhi 18:6a4db94011d3 217 *
sahilmgandhi 18:6a4db94011d3 218 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 219 * @param[in] seconds New period in seconds
sahilmgandhi 18:6a4db94011d3 220 * @return void
sahilmgandhi 18:6a4db94011d3 221 */
sahilmgandhi 18:6a4db94011d3 222 void pwmout_period(pwmout_t* obj, float seconds)
sahilmgandhi 18:6a4db94011d3 223 {
sahilmgandhi 18:6a4db94011d3 224 pwmout_period_us(obj, seconds * 1000000.0f);
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] value New period in milliseconds
sahilmgandhi 18:6a4db94011d3 231 * @return void
sahilmgandhi 18:6a4db94011d3 232 */
sahilmgandhi 18:6a4db94011d3 233 void pwmout_period_ms(pwmout_t* obj, int ms)
sahilmgandhi 18:6a4db94011d3 234 {
sahilmgandhi 18:6a4db94011d3 235 pwmout_period_us(obj, ms * 1000);
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] us New period in microseconds
sahilmgandhi 18:6a4db94011d3 242 * @return void
sahilmgandhi 18:6a4db94011d3 243 */
sahilmgandhi 18:6a4db94011d3 244 void pwmout_period_us(pwmout_t* obj, int us)
sahilmgandhi 18:6a4db94011d3 245 {
sahilmgandhi 18:6a4db94011d3 246 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 247 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 248
sahilmgandhi 18:6a4db94011d3 249 /* Disable PWM Module */
sahilmgandhi 18:6a4db94011d3 250 tcc_disable(&obj->tcc);
sahilmgandhi 18:6a4db94011d3 251
sahilmgandhi 18:6a4db94011d3 252 /* TODO: Find and set the period */
sahilmgandhi 18:6a4db94011d3 253 pwmout_set_period(obj, us);
sahilmgandhi 18:6a4db94011d3 254
sahilmgandhi 18:6a4db94011d3 255 /* Update the changes */
sahilmgandhi 18:6a4db94011d3 256 if (pwmout_init_hw(obj)) {
sahilmgandhi 18:6a4db94011d3 257 /* Enable PWM Module */
sahilmgandhi 18:6a4db94011d3 258 tcc_enable(&obj->tcc);
sahilmgandhi 18:6a4db94011d3 259 }
sahilmgandhi 18:6a4db94011d3 260 }
sahilmgandhi 18:6a4db94011d3 261
sahilmgandhi 18:6a4db94011d3 262 /** Set the pulse width of PWM Waveform
sahilmgandhi 18:6a4db94011d3 263 *
sahilmgandhi 18:6a4db94011d3 264 * @param[in] obj The PWM object
sahilmgandhi 18:6a4db94011d3 265 * @param[in] seconds New pulse width in seconds
sahilmgandhi 18:6a4db94011d3 266 * @return void
sahilmgandhi 18:6a4db94011d3 267 */
sahilmgandhi 18:6a4db94011d3 268 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
sahilmgandhi 18:6a4db94011d3 269 {
sahilmgandhi 18:6a4db94011d3 270 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
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] ms New pulse width in milliseconds
sahilmgandhi 18:6a4db94011d3 277 * @return void
sahilmgandhi 18:6a4db94011d3 278 */
sahilmgandhi 18:6a4db94011d3 279 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
sahilmgandhi 18:6a4db94011d3 280 {
sahilmgandhi 18:6a4db94011d3 281 pwmout_pulsewidth_us(obj, ms * 1000);
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] us New pulse width in microseconds
sahilmgandhi 18:6a4db94011d3 288 * @return void
sahilmgandhi 18:6a4db94011d3 289 */
sahilmgandhi 18:6a4db94011d3 290 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
sahilmgandhi 18:6a4db94011d3 291 {
sahilmgandhi 18:6a4db94011d3 292 /* Sanity check arguments */
sahilmgandhi 18:6a4db94011d3 293 MBED_ASSERT(obj);
sahilmgandhi 18:6a4db94011d3 294
sahilmgandhi 18:6a4db94011d3 295 uint32_t us_pulse = us;
sahilmgandhi 18:6a4db94011d3 296
sahilmgandhi 18:6a4db94011d3 297 /* Find the new duty cycle */
sahilmgandhi 18:6a4db94011d3 298 double duty_cycle = us_pulse / ((double)obj->period * obj->us_per_cycle);
sahilmgandhi 18:6a4db94011d3 299
sahilmgandhi 18:6a4db94011d3 300 /* This call updates pulse width as well as period */
sahilmgandhi 18:6a4db94011d3 301 pwmout_write(obj, duty_cycle);
sahilmgandhi 18:6a4db94011d3 302 }