Cortney Padua / mbed-dev

fixed drive strength

Dependents:   capstone_i2c

Fork of mbed-dev by mbed official

targets/TARGET_NORDIC/TARGET_NRF5/TARGET_MCU_NRF52832/pwmout_api.c@149:156823d33999, 2016-10-28 (annotated)

Committer:
<>
Date:
Fri Oct 28 11:17:30 2016 +0100
Revision:
149:156823d33999
Parent:
targets/hal/TARGET_NORDIC/TARGET_NRF5/TARGET_MCU_NRF52832/pwmout_api.c@144:ef7eb2e8f9f7
Child:
150:02e0a0aed4ec
This updates the lib to the mbed lib v128



NOTE: This release includes a restructuring of the file and directory locations and thus some

include paths in your code may need updating accordingly.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /*
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2013 Nordic Semiconductor ASA
<> 144:ef7eb2e8f9f7 3 * All rights reserved.
<> 144:ef7eb2e8f9f7 4 *
<> 144:ef7eb2e8f9f7 5 * Redistribution and use in source and binary forms, with or without modification,
<> 144:ef7eb2e8f9f7 6 * are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * 1. Redistributions of source code must retain the above copyright notice, this list
<> 144:ef7eb2e8f9f7 9 * of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 10 *
<> 144:ef7eb2e8f9f7 11 * 2. Redistributions in binary form, except as embedded into a Nordic Semiconductor ASA
<> 144:ef7eb2e8f9f7 12 * integrated circuit in a product or a software update for such product, must reproduce
<> 144:ef7eb2e8f9f7 13 * the above copyright notice, this list of conditions and the following disclaimer in
<> 144:ef7eb2e8f9f7 14 * the documentation and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 15 *
<> 144:ef7eb2e8f9f7 16 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its contributors may be
<> 144:ef7eb2e8f9f7 17 * used to endorse or promote products derived from this software without specific prior
<> 144:ef7eb2e8f9f7 18 * written permission.
<> 144:ef7eb2e8f9f7 19 *
<> 144:ef7eb2e8f9f7 20 * 4. This software, with or without modification, must only be used with a
<> 144:ef7eb2e8f9f7 21 * Nordic Semiconductor ASA integrated circuit.
<> 144:ef7eb2e8f9f7 22 *
<> 144:ef7eb2e8f9f7 23 * 5. Any software provided in binary or object form under this license must not be reverse
<> 144:ef7eb2e8f9f7 24 * engineered, decompiled, modified and/or disassembled.
<> 144:ef7eb2e8f9f7 25 *
<> 144:ef7eb2e8f9f7 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
<> 144:ef7eb2e8f9f7 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
<> 144:ef7eb2e8f9f7 28 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 29 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
<> 144:ef7eb2e8f9f7 30 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
<> 144:ef7eb2e8f9f7 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
<> 144:ef7eb2e8f9f7 32 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
<> 144:ef7eb2e8f9f7 33 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
<> 144:ef7eb2e8f9f7 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
<> 144:ef7eb2e8f9f7 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 36 *
<> 144:ef7eb2e8f9f7 37 */
<> 144:ef7eb2e8f9f7 38
<> 144:ef7eb2e8f9f7 39 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 40 #include "mbed_error.h"
<> 144:ef7eb2e8f9f7 41 #include "pwmout_api.h"
<> 144:ef7eb2e8f9f7 42 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 43 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 44
<> 144:ef7eb2e8f9f7 45 #if DEVICE_PWMOUT
<> 144:ef7eb2e8f9f7 46
<> 144:ef7eb2e8f9f7 47 #include "app_util_platform.h"
<> 144:ef7eb2e8f9f7 48 #include "nrf_drv_pwm.h"
<> 144:ef7eb2e8f9f7 49
<> 144:ef7eb2e8f9f7 50 #define MAX_PWM_COUNTERTOP (0x7FFF) // 0x7FFF is the max of COUNTERTOP value for the PWM peripherial of the nRF52.
<> 144:ef7eb2e8f9f7 51 #define MAX_PWM_PERIOD_US (MAX_PWM_COUNTERTOP * 8) // PWM hw is driven by 16 MHz clock, hence the tick is 1_us/16,
<> 144:ef7eb2e8f9f7 52 // and 128 is the max prescaler value.
<> 144:ef7eb2e8f9f7 53 #define MAX_PWM_PERIOD_MS ((MAX_PWM_PERIOD_US / 1000) + 1) // approximations advance
<> 144:ef7eb2e8f9f7 54 #define MAX_PWM_PERIOD_S ((MAX_PWM_PERIOD_US / 1000000) + 1) // approximations advance
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56
<> 144:ef7eb2e8f9f7 57 #define PWM_INSTANCE_COUNT (PWM_COUNT) // import from the nrf_drv_config.h file
<> 144:ef7eb2e8f9f7 58
<> 144:ef7eb2e8f9f7 59 ///> instances of nRF52 PWM driver
<> 144:ef7eb2e8f9f7 60 static const nrf_drv_pwm_t m_pwm_driver[PWM_INSTANCE_COUNT] =
<> 144:ef7eb2e8f9f7 61 {
<> 144:ef7eb2e8f9f7 62 #if PWM0_ENABLED
<> 144:ef7eb2e8f9f7 63 NRF_DRV_PWM_INSTANCE(0),
<> 144:ef7eb2e8f9f7 64 #endif
<> 144:ef7eb2e8f9f7 65 #if PWM1_ENABLED
<> 144:ef7eb2e8f9f7 66 NRF_DRV_PWM_INSTANCE(1),
<> 144:ef7eb2e8f9f7 67 #endif
<> 144:ef7eb2e8f9f7 68 #if PWM2_ENABLED
<> 144:ef7eb2e8f9f7 69 NRF_DRV_PWM_INSTANCE(2)
<> 144:ef7eb2e8f9f7 70 #endif
<> 144:ef7eb2e8f9f7 71 };
<> 144:ef7eb2e8f9f7 72
<> 144:ef7eb2e8f9f7 73 typedef struct
<> 144:ef7eb2e8f9f7 74 {
<> 144:ef7eb2e8f9f7 75 uint32_t period_us;
<> 144:ef7eb2e8f9f7 76 uint32_t duty_us;
<> 144:ef7eb2e8f9f7 77 float duty;
<> 144:ef7eb2e8f9f7 78 } pwm_signal_t; /// PWM signal description type
<> 144:ef7eb2e8f9f7 79
<> 144:ef7eb2e8f9f7 80 typedef struct
<> 144:ef7eb2e8f9f7 81 {
<> 144:ef7eb2e8f9f7 82 nrf_drv_pwm_t * p_pwm_driver;
<> 144:ef7eb2e8f9f7 83 pwm_signal_t signal;
<> 144:ef7eb2e8f9f7 84 volatile nrf_pwm_values_common_t seq_values[1];
<> 144:ef7eb2e8f9f7 85 } pwm_t; /// internal PWM instance support type
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 static pwm_t m_pwm[PWM_INSTANCE_COUNT] =
<> 144:ef7eb2e8f9f7 88 {
<> 144:ef7eb2e8f9f7 89 #if PWM0_ENABLED
<> 144:ef7eb2e8f9f7 90 {.p_pwm_driver = NULL},
<> 144:ef7eb2e8f9f7 91 #endif
<> 144:ef7eb2e8f9f7 92 #if PWM1_ENABLED
<> 144:ef7eb2e8f9f7 93 {.p_pwm_driver = NULL},
<> 144:ef7eb2e8f9f7 94 #endif
<> 144:ef7eb2e8f9f7 95 #if PWM2_ENABLED
<> 144:ef7eb2e8f9f7 96 {.p_pwm_driver = NULL}
<> 144:ef7eb2e8f9f7 97 #endif
<> 144:ef7eb2e8f9f7 98 }; /// Array of internal PWM instances.
<> 144:ef7eb2e8f9f7 99
<> 144:ef7eb2e8f9f7 100 typedef struct
<> 144:ef7eb2e8f9f7 101 {
<> 144:ef7eb2e8f9f7 102 uint16_t period_hwu; // unit related to pwm_clk
<> 144:ef7eb2e8f9f7 103 uint16_t duty_hwu; // unit related to pwm_clk
<> 144:ef7eb2e8f9f7 104 nrf_pwm_clk_t pwm_clk;
<> 144:ef7eb2e8f9f7 105 } pulsewidth_set_t; /// helper type for timing calculations
<> 144:ef7eb2e8f9f7 106
<> 144:ef7eb2e8f9f7 107
<> 144:ef7eb2e8f9f7 108 static void internal_pwmout_exe(pwmout_t *obj, bool new_period, bool initialization);
<> 144:ef7eb2e8f9f7 109
<> 144:ef7eb2e8f9f7 110 void pwmout_init(pwmout_t *obj, PinName pin)
<> 144:ef7eb2e8f9f7 111 {
<> 144:ef7eb2e8f9f7 112 uint32_t i;
<> 144:ef7eb2e8f9f7 113
<> 144:ef7eb2e8f9f7 114 for (i = 0; PWM_INSTANCE_COUNT; i++)
<> 144:ef7eb2e8f9f7 115 {
<> 144:ef7eb2e8f9f7 116 if (m_pwm[i].p_pwm_driver == NULL) // a driver instance not assigned to the obj?
<> 144:ef7eb2e8f9f7 117 {
<> 144:ef7eb2e8f9f7 118 obj->pin = pin;
<> 144:ef7eb2e8f9f7 119
<> 144:ef7eb2e8f9f7 120 obj->pwm_channel = i;
<> 144:ef7eb2e8f9f7 121
<> 144:ef7eb2e8f9f7 122 m_pwm[i].p_pwm_driver = (nrf_drv_pwm_t *) &m_pwm_driver[i];
<> 144:ef7eb2e8f9f7 123 m_pwm[i].signal.period_us = 200000; // 0.02 s
<> 144:ef7eb2e8f9f7 124 m_pwm[i].signal.duty_us = 100000;
<> 144:ef7eb2e8f9f7 125 m_pwm[i].signal.duty = 0.5f;
<> 144:ef7eb2e8f9f7 126
<> 144:ef7eb2e8f9f7 127 obj->pwm_struct = &m_pwm[i];
<> 144:ef7eb2e8f9f7 128
<> 144:ef7eb2e8f9f7 129 internal_pwmout_exe(obj, true, true);
<> 144:ef7eb2e8f9f7 130
<> 144:ef7eb2e8f9f7 131 break;
<> 144:ef7eb2e8f9f7 132 }
<> 144:ef7eb2e8f9f7 133 }
<> 144:ef7eb2e8f9f7 134
<> 144:ef7eb2e8f9f7 135 MBED_ASSERT(i != PWM_INSTANCE_COUNT); // assert if free instance was not found.
<> 144:ef7eb2e8f9f7 136 }
<> 144:ef7eb2e8f9f7 137
<> 144:ef7eb2e8f9f7 138 void pwmout_free(pwmout_t *obj)
<> 144:ef7eb2e8f9f7 139 {
<> 144:ef7eb2e8f9f7 140 nrf_drv_pwm_uninit( (nrf_drv_pwm_t*) obj->pwm_struct );
<> 144:ef7eb2e8f9f7 141
<> 144:ef7eb2e8f9f7 142 m_pwm[obj->pwm_channel].p_pwm_driver = NULL;
<> 144:ef7eb2e8f9f7 143 }
<> 144:ef7eb2e8f9f7 144
<> 144:ef7eb2e8f9f7 145 void pwmout_write(pwmout_t *obj, float percent)
<> 144:ef7eb2e8f9f7 146 {
<> 144:ef7eb2e8f9f7 147
<> 144:ef7eb2e8f9f7 148 if (percent < 0)
<> 144:ef7eb2e8f9f7 149 {
<> 144:ef7eb2e8f9f7 150 percent = 0;
<> 144:ef7eb2e8f9f7 151 }
<> 144:ef7eb2e8f9f7 152 else if (percent > 1)
<> 144:ef7eb2e8f9f7 153 {
<> 144:ef7eb2e8f9f7 154 percent = 1;
<> 144:ef7eb2e8f9f7 155 }
<> 144:ef7eb2e8f9f7 156
<> 144:ef7eb2e8f9f7 157 pwm_signal_t * p_pwm_signal = &(((pwm_t*)obj->pwm_struct)->signal);
<> 144:ef7eb2e8f9f7 158
<> 144:ef7eb2e8f9f7 159 p_pwm_signal->duty = percent;
<> 144:ef7eb2e8f9f7 160
<> 144:ef7eb2e8f9f7 161 int us = (((int)p_pwm_signal->period_us) * percent);
<> 144:ef7eb2e8f9f7 162
<> 144:ef7eb2e8f9f7 163 pwmout_pulsewidth_us(obj, us);
<> 144:ef7eb2e8f9f7 164 }
<> 144:ef7eb2e8f9f7 165
<> 144:ef7eb2e8f9f7 166 float pwmout_read(pwmout_t *obj)
<> 144:ef7eb2e8f9f7 167 {
<> 144:ef7eb2e8f9f7 168 pwm_signal_t * p_pwm_signal = &(((pwm_t*)obj->pwm_struct)->signal);
<> 144:ef7eb2e8f9f7 169
<> 144:ef7eb2e8f9f7 170 return (float)p_pwm_signal->duty_us / (float)p_pwm_signal->period_us;
<> 144:ef7eb2e8f9f7 171 }
<> 144:ef7eb2e8f9f7 172
<> 144:ef7eb2e8f9f7 173 void pwmout_period(pwmout_t *obj, float seconds)
<> 144:ef7eb2e8f9f7 174 {
<> 144:ef7eb2e8f9f7 175 // raught saturation < 0, quasi-max>
<> 144:ef7eb2e8f9f7 176 if (seconds > MAX_PWM_PERIOD_S)
<> 144:ef7eb2e8f9f7 177 {
<> 144:ef7eb2e8f9f7 178 seconds = MAX_PWM_PERIOD_S;
<> 144:ef7eb2e8f9f7 179 }
<> 144:ef7eb2e8f9f7 180 else if (seconds < 0)
<> 144:ef7eb2e8f9f7 181 {
<> 144:ef7eb2e8f9f7 182 seconds = 0; // f. pwmout_period_us will set period to min. value
<> 144:ef7eb2e8f9f7 183 }
<> 144:ef7eb2e8f9f7 184
<> 144:ef7eb2e8f9f7 185 int us = seconds * 1000000;
<> 144:ef7eb2e8f9f7 186
<> 144:ef7eb2e8f9f7 187 pwmout_period_us(obj, us);
<> 144:ef7eb2e8f9f7 188 }
<> 144:ef7eb2e8f9f7 189
<> 144:ef7eb2e8f9f7 190 void pwmout_period_ms(pwmout_t *obj, int ms)
<> 144:ef7eb2e8f9f7 191 {
<> 144:ef7eb2e8f9f7 192 // reught saturation < 0, quasi-max>
<> 144:ef7eb2e8f9f7 193 if (ms > MAX_PWM_PERIOD_MS)
<> 144:ef7eb2e8f9f7 194 {
<> 144:ef7eb2e8f9f7 195 ms = MAX_PWM_PERIOD_MS;
<> 144:ef7eb2e8f9f7 196 }
<> 144:ef7eb2e8f9f7 197 else if (ms < 0)
<> 144:ef7eb2e8f9f7 198 {
<> 144:ef7eb2e8f9f7 199 ms = 0; // f. pwmout_period_us will set period to min. value
<> 144:ef7eb2e8f9f7 200 }
<> 144:ef7eb2e8f9f7 201
<> 144:ef7eb2e8f9f7 202 int us = ms * 1000;
<> 144:ef7eb2e8f9f7 203
<> 144:ef7eb2e8f9f7 204 pwmout_period_us(obj, us);
<> 144:ef7eb2e8f9f7 205 }
<> 144:ef7eb2e8f9f7 206
<> 144:ef7eb2e8f9f7 207
<> 144:ef7eb2e8f9f7 208 void pwmout_period_us(pwmout_t *obj, int us)
<> 144:ef7eb2e8f9f7 209 {
<> 144:ef7eb2e8f9f7 210 pwm_signal_t * p_pwm_signal = &(((pwm_t*)obj->pwm_struct)->signal);
<> 144:ef7eb2e8f9f7 211
<> 144:ef7eb2e8f9f7 212 // saturation <1, real-max>
<> 144:ef7eb2e8f9f7 213 if (us > MAX_PWM_PERIOD_US)
<> 144:ef7eb2e8f9f7 214 {
<> 144:ef7eb2e8f9f7 215 us = MAX_PWM_PERIOD_US;
<> 144:ef7eb2e8f9f7 216 }
<> 144:ef7eb2e8f9f7 217 else if (us < 1)
<> 144:ef7eb2e8f9f7 218 {
<> 144:ef7eb2e8f9f7 219 us = 1;
<> 144:ef7eb2e8f9f7 220 }
<> 144:ef7eb2e8f9f7 221
<> 144:ef7eb2e8f9f7 222 p_pwm_signal->duty_us = (int)((float)us * p_pwm_signal->duty);
<> 144:ef7eb2e8f9f7 223
<> 144:ef7eb2e8f9f7 224 p_pwm_signal->period_us = us;
<> 144:ef7eb2e8f9f7 225
<> 144:ef7eb2e8f9f7 226 internal_pwmout_exe(obj, true, false);
<> 144:ef7eb2e8f9f7 227 }
<> 144:ef7eb2e8f9f7 228
<> 144:ef7eb2e8f9f7 229 void pwmout_pulsewidth(pwmout_t *obj, float seconds)
<> 144:ef7eb2e8f9f7 230 {
<> 144:ef7eb2e8f9f7 231 // raught saturation < 0, quasi-max>
<> 144:ef7eb2e8f9f7 232 if (seconds > MAX_PWM_PERIOD_S)
<> 144:ef7eb2e8f9f7 233 {
<> 144:ef7eb2e8f9f7 234 seconds = MAX_PWM_PERIOD_S;
<> 144:ef7eb2e8f9f7 235 }
<> 144:ef7eb2e8f9f7 236 else if (seconds < 0)
<> 144:ef7eb2e8f9f7 237 {
<> 144:ef7eb2e8f9f7 238 seconds = 0;
<> 144:ef7eb2e8f9f7 239 }
<> 144:ef7eb2e8f9f7 240
<> 144:ef7eb2e8f9f7 241 int us = seconds * 1000000;
<> 144:ef7eb2e8f9f7 242
<> 144:ef7eb2e8f9f7 243 pwmout_pulsewidth_us(obj,us);
<> 144:ef7eb2e8f9f7 244 }
<> 144:ef7eb2e8f9f7 245
<> 144:ef7eb2e8f9f7 246 void pwmout_pulsewidth_ms(pwmout_t *obj, int ms)
<> 144:ef7eb2e8f9f7 247 {
<> 144:ef7eb2e8f9f7 248 // raught saturation < 0, quasi-max>
<> 144:ef7eb2e8f9f7 249 if (ms > MAX_PWM_PERIOD_MS)
<> 144:ef7eb2e8f9f7 250 {
<> 144:ef7eb2e8f9f7 251 ms = MAX_PWM_PERIOD_MS;
<> 144:ef7eb2e8f9f7 252 }
<> 144:ef7eb2e8f9f7 253 else if (ms < 0)
<> 144:ef7eb2e8f9f7 254 {
<> 144:ef7eb2e8f9f7 255 ms = 0;
<> 144:ef7eb2e8f9f7 256 }
<> 144:ef7eb2e8f9f7 257
<> 144:ef7eb2e8f9f7 258 int us = ms * 1000;
<> 144:ef7eb2e8f9f7 259
<> 144:ef7eb2e8f9f7 260 pwmout_pulsewidth_us(obj, us);
<> 144:ef7eb2e8f9f7 261 }
<> 144:ef7eb2e8f9f7 262
<> 144:ef7eb2e8f9f7 263 void pwmout_pulsewidth_us(pwmout_t *obj, int us)
<> 144:ef7eb2e8f9f7 264 {
<> 144:ef7eb2e8f9f7 265 // saturation <0, real-max>
<> 144:ef7eb2e8f9f7 266 if (us > MAX_PWM_PERIOD_US)
<> 144:ef7eb2e8f9f7 267 {
<> 144:ef7eb2e8f9f7 268 us = MAX_PWM_PERIOD_US;
<> 144:ef7eb2e8f9f7 269 }
<> 144:ef7eb2e8f9f7 270 else if (us < 0)
<> 144:ef7eb2e8f9f7 271 {
<> 144:ef7eb2e8f9f7 272 us = 0;
<> 144:ef7eb2e8f9f7 273 }
<> 144:ef7eb2e8f9f7 274
<> 144:ef7eb2e8f9f7 275 pwm_signal_t * p_pwm_signal = &(((pwm_t*)obj->pwm_struct)->signal);
<> 144:ef7eb2e8f9f7 276
<> 144:ef7eb2e8f9f7 277 p_pwm_signal->duty_us = us;
<> 144:ef7eb2e8f9f7 278 p_pwm_signal->duty = us / p_pwm_signal->period_us;
<> 144:ef7eb2e8f9f7 279
<> 144:ef7eb2e8f9f7 280 internal_pwmout_exe(obj, false, false);
<> 144:ef7eb2e8f9f7 281 }
<> 144:ef7eb2e8f9f7 282
<> 144:ef7eb2e8f9f7 283
<> 144:ef7eb2e8f9f7 284
<> 144:ef7eb2e8f9f7 285
<> 144:ef7eb2e8f9f7 286
<> 144:ef7eb2e8f9f7 287
<> 144:ef7eb2e8f9f7 288 static ret_code_t pulsewidth_us_set_get(int period_hwu, int duty_hwu, pulsewidth_set_t * p_settings)
<> 144:ef7eb2e8f9f7 289 {
<> 144:ef7eb2e8f9f7 290 uint16_t div;
<> 144:ef7eb2e8f9f7 291 nrf_pwm_clk_t pwm_clk = NRF_PWM_CLK_16MHz;
<> 144:ef7eb2e8f9f7 292
<> 144:ef7eb2e8f9f7 293 for(div = 1; div <= 128 ; div <<= 1) // 128 is the maximum of clock prescaler for PWM peripherial
<> 144:ef7eb2e8f9f7 294 {
<> 144:ef7eb2e8f9f7 295 if (MAX_PWM_COUNTERTOP >= period_hwu)
<> 144:ef7eb2e8f9f7 296 {
<> 144:ef7eb2e8f9f7 297 p_settings->period_hwu = period_hwu; // unit [us/16 * div]
<> 144:ef7eb2e8f9f7 298 p_settings->duty_hwu = duty_hwu; // unit [us/16 * div]
<> 144:ef7eb2e8f9f7 299 p_settings->pwm_clk = pwm_clk;
<> 144:ef7eb2e8f9f7 300
<> 144:ef7eb2e8f9f7 301 return NRF_SUCCESS;
<> 144:ef7eb2e8f9f7 302 }
<> 144:ef7eb2e8f9f7 303
<> 144:ef7eb2e8f9f7 304 period_hwu >>= 1;
<> 144:ef7eb2e8f9f7 305 duty_hwu >>= 1;
<> 144:ef7eb2e8f9f7 306 pwm_clk++;
<> 144:ef7eb2e8f9f7 307 }
<> 144:ef7eb2e8f9f7 308
<> 144:ef7eb2e8f9f7 309 return NRF_ERROR_INVALID_PARAM;
<> 144:ef7eb2e8f9f7 310 }
<> 144:ef7eb2e8f9f7 311
<> 144:ef7eb2e8f9f7 312
<> 144:ef7eb2e8f9f7 313 static void internal_pwmout_exe(pwmout_t *obj, bool new_period, bool initialization)
<> 144:ef7eb2e8f9f7 314 {
<> 144:ef7eb2e8f9f7 315 pulsewidth_set_t pulsewidth_set;
<> 144:ef7eb2e8f9f7 316 pwm_signal_t * p_pwm_signal;
<> 144:ef7eb2e8f9f7 317 nrf_drv_pwm_t * p_pwm_driver;
<> 144:ef7eb2e8f9f7 318 ret_code_t ret_code;
<> 144:ef7eb2e8f9f7 319
<> 144:ef7eb2e8f9f7 320 p_pwm_signal = &(((pwm_t*)obj->pwm_struct)->signal);
<> 144:ef7eb2e8f9f7 321
<> 144:ef7eb2e8f9f7 322 if (NRF_SUCCESS == pulsewidth_us_set_get(p_pwm_signal->period_us * 16, // base clk for PWM is 16 MHz
<> 144:ef7eb2e8f9f7 323 p_pwm_signal->duty_us * 16, // base clk for PWM is 16 MHz
<> 144:ef7eb2e8f9f7 324 &pulsewidth_set))
<> 144:ef7eb2e8f9f7 325 {
<> 144:ef7eb2e8f9f7 326 p_pwm_driver = (((pwm_t*)obj->pwm_struct)->p_pwm_driver);
<> 144:ef7eb2e8f9f7 327
<> 144:ef7eb2e8f9f7 328 const nrf_pwm_sequence_t seq =
<> 144:ef7eb2e8f9f7 329 {
<> 144:ef7eb2e8f9f7 330 .values.p_common = (nrf_pwm_values_common_t*) (((pwm_t*)obj->pwm_struct)->seq_values),
<> 144:ef7eb2e8f9f7 331 .length = 1,
<> 144:ef7eb2e8f9f7 332 .repeats = 0,
<> 144:ef7eb2e8f9f7 333 .end_delay = 0
<> 144:ef7eb2e8f9f7 334 };
<> 144:ef7eb2e8f9f7 335
<> 144:ef7eb2e8f9f7 336 (((pwm_t*)obj->pwm_struct)->seq_values)[0] = pulsewidth_set.duty_hwu | 0x8000;
<> 144:ef7eb2e8f9f7 337
<> 144:ef7eb2e8f9f7 338 if (new_period)
<> 144:ef7eb2e8f9f7 339 {
<> 144:ef7eb2e8f9f7 340 nrf_drv_pwm_config_t config0 =
<> 144:ef7eb2e8f9f7 341 {
<> 144:ef7eb2e8f9f7 342 .output_pins =
<> 144:ef7eb2e8f9f7 343 {
<> 144:ef7eb2e8f9f7 344 obj->pin | NRF_DRV_PWM_PIN_INVERTED, // channel 0
<> 144:ef7eb2e8f9f7 345 NRF_DRV_PWM_PIN_NOT_USED, // channel 1
<> 144:ef7eb2e8f9f7 346 NRF_DRV_PWM_PIN_NOT_USED, // channel 2
<> 144:ef7eb2e8f9f7 347 NRF_DRV_PWM_PIN_NOT_USED, // channel 3
<> 144:ef7eb2e8f9f7 348 },
<> 144:ef7eb2e8f9f7 349 .irq_priority = APP_IRQ_PRIORITY_LOW,
<> 144:ef7eb2e8f9f7 350 .base_clock = pulsewidth_set.pwm_clk,
<> 144:ef7eb2e8f9f7 351 .count_mode = NRF_PWM_MODE_UP,
<> 144:ef7eb2e8f9f7 352 .top_value = pulsewidth_set.period_hwu,
<> 144:ef7eb2e8f9f7 353 .load_mode = NRF_PWM_LOAD_COMMON,
<> 144:ef7eb2e8f9f7 354 .step_mode = NRF_PWM_STEP_AUTO
<> 144:ef7eb2e8f9f7 355 };
<> 144:ef7eb2e8f9f7 356
<> 144:ef7eb2e8f9f7 357 if (!initialization)
<> 144:ef7eb2e8f9f7 358 {
<> 144:ef7eb2e8f9f7 359 nrf_drv_pwm_uninit(p_pwm_driver);
<> 144:ef7eb2e8f9f7 360 }
<> 144:ef7eb2e8f9f7 361
<> 144:ef7eb2e8f9f7 362 ret_code = nrf_drv_pwm_init( p_pwm_driver, &config0, NULL);
<> 144:ef7eb2e8f9f7 363
<> 144:ef7eb2e8f9f7 364 MBED_ASSERT(ret_code == NRF_SUCCESS); // assert if free instance was not found.
<> 144:ef7eb2e8f9f7 365 }
<> 144:ef7eb2e8f9f7 366
<> 144:ef7eb2e8f9f7 367 nrf_drv_pwm_simple_playback(p_pwm_driver, &seq, 0, NRF_DRV_PWM_FLAG_LOOP);
<> 144:ef7eb2e8f9f7 368 }
<> 144:ef7eb2e8f9f7 369 else
<> 144:ef7eb2e8f9f7 370 {
<> 144:ef7eb2e8f9f7 371 MBED_ASSERT(0); // force assertion
<> 144:ef7eb2e8f9f7 372 }
<> 144:ef7eb2e8f9f7 373
<> 144:ef7eb2e8f9f7 374 }
<> 144:ef7eb2e8f9f7 375
<> 144:ef7eb2e8f9f7 376 #endif // DEVICE_PWMOUT