shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/pwmout_api.c@166:cb4253f91ada, 2014-04-22 (annotated)

Committer:
mbed_official
Date:
Tue Apr 22 16:00:06 2014 +0100
Revision:
166:cb4253f91ada
Parent:
164:90c6009cba07
Child:
187:3c46d8ef3e7f
Synchronized with git revision a519f94f35c3993310499623be5c28f74b80485c



Full URL: https://github.com/mbedmicro/mbed/commit/a519f94f35c3993310499623be5c28f74b80485c/



[NUCLEO_F030R8] Many improvements added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 84:f54042cbc282 1 /* mbed Microcontroller Library
mbed_official 84:f54042cbc282 2 *******************************************************************************
mbed_official 84:f54042cbc282 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 84:f54042cbc282 4 * All rights reserved.
mbed_official 84:f54042cbc282 5 *
mbed_official 84:f54042cbc282 6 * Redistribution and use in source and binary forms, with or without
mbed_official 84:f54042cbc282 7 * modification, are permitted provided that the following conditions are met:
mbed_official 84:f54042cbc282 8 *
mbed_official 84:f54042cbc282 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 84:f54042cbc282 10 * this list of conditions and the following disclaimer.
mbed_official 84:f54042cbc282 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 84:f54042cbc282 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 84:f54042cbc282 13 * and/or other materials provided with the distribution.
mbed_official 84:f54042cbc282 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 84:f54042cbc282 15 * may be used to endorse or promote products derived from this software
mbed_official 84:f54042cbc282 16 * without specific prior written permission.
mbed_official 84:f54042cbc282 17 *
mbed_official 84:f54042cbc282 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 84:f54042cbc282 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 84:f54042cbc282 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 84:f54042cbc282 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 84:f54042cbc282 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 84:f54042cbc282 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 84:f54042cbc282 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 84:f54042cbc282 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 84:f54042cbc282 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 84:f54042cbc282 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 84:f54042cbc282 28 *******************************************************************************
mbed_official 84:f54042cbc282 29 */
mbed_official 84:f54042cbc282 30 #include "pwmout_api.h"
mbed_official 84:f54042cbc282 31
mbed_official 166:cb4253f91ada 32 #if DEVICE_PWMOUT
mbed_official 166:cb4253f91ada 33
mbed_official 84:f54042cbc282 34 #include "cmsis.h"
mbed_official 84:f54042cbc282 35 #include "pinmap.h"
mbed_official 84:f54042cbc282 36 #include "error.h"
mbed_official 84:f54042cbc282 37
mbed_official 164:90c6009cba07 38 // TIM1 cannot be used because already used by the us_ticker
mbed_official 84:f54042cbc282 39 static const PinMap PinMap_PWM[] = {
mbed_official 164:90c6009cba07 40 {PA_4, TIM_14, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_4)}, // TIM14_CH1
mbed_official 164:90c6009cba07 41 {PA_6, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH1
mbed_official 164:90c6009cba07 42 // {PA_6, TIM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_5)}, // TIM16_CH1
mbed_official 164:90c6009cba07 43 {PA_7, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH1
mbed_official 164:90c6009cba07 44 // {PA_7, TIM_14, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_4)}, // TIM14_CH1
mbed_official 164:90c6009cba07 45 // {PA_7, TIM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_5)}, // TIM17_CH1
mbed_official 164:90c6009cba07 46 {PB_0, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH3
mbed_official 164:90c6009cba07 47 {PB_1, TIM_14, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM14_CH1
mbed_official 164:90c6009cba07 48 // {PB_1, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH4
mbed_official 164:90c6009cba07 49 {PB_4, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH1
mbed_official 164:90c6009cba07 50 {PB_5, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH2
mbed_official 164:90c6009cba07 51 {PB_6, TIM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_2)}, // TIM16_CH1N
mbed_official 164:90c6009cba07 52 {PB_7, TIM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_2)}, // TIM17_CH1N
mbed_official 164:90c6009cba07 53 {PB_8, TIM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_2)}, // TIM16_CH1
mbed_official 164:90c6009cba07 54 {PB_9, TIM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_2)}, // TIM17_CH1
mbed_official 164:90c6009cba07 55 {PB_14, TIM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM15_CH1
mbed_official 164:90c6009cba07 56 {PB_15, TIM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM15_CH2
mbed_official 164:90c6009cba07 57 // {PB_15, TIM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_3)}, // TIM15_CH1N
mbed_official 164:90c6009cba07 58 {PC_6, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM3_CH1
mbed_official 84:f54042cbc282 59 {PC_7, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM3_CH2
mbed_official 164:90c6009cba07 60 {PC_8, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM3_CH3
mbed_official 164:90c6009cba07 61 {PC_9, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM3_CH4
mbed_official 84:f54042cbc282 62 {NC, NC, 0}
mbed_official 84:f54042cbc282 63 };
mbed_official 84:f54042cbc282 64
mbed_official 84:f54042cbc282 65 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 84:f54042cbc282 66 // Get the peripheral name from the pin and assign it to the object
mbed_official 84:f54042cbc282 67 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 84:f54042cbc282 68
mbed_official 84:f54042cbc282 69 if (obj->pwm == (PWMName)NC) {
mbed_official 84:f54042cbc282 70 error("PWM pinout mapping failed");
mbed_official 84:f54042cbc282 71 }
mbed_official 84:f54042cbc282 72
mbed_official 84:f54042cbc282 73 // Enable TIM clock
mbed_official 84:f54042cbc282 74 if (obj->pwm == TIM_3) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
mbed_official 84:f54042cbc282 75 if (obj->pwm == TIM_14) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14, ENABLE);
mbed_official 164:90c6009cba07 76 if (obj->pwm == TIM_15) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM15, ENABLE);
mbed_official 84:f54042cbc282 77 if (obj->pwm == TIM_16) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16, ENABLE);
mbed_official 164:90c6009cba07 78 if (obj->pwm == TIM_17) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM17, ENABLE);
mbed_official 84:f54042cbc282 79
mbed_official 84:f54042cbc282 80 // Configure GPIO
mbed_official 84:f54042cbc282 81 pinmap_pinout(pin, PinMap_PWM);
mbed_official 84:f54042cbc282 82 //pin_mode(pin, PullUp);
mbed_official 84:f54042cbc282 83
mbed_official 84:f54042cbc282 84 obj->pin = pin;
mbed_official 84:f54042cbc282 85 obj->period = 0;
mbed_official 84:f54042cbc282 86 obj->pulse = 0;
mbed_official 84:f54042cbc282 87
mbed_official 84:f54042cbc282 88 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 84:f54042cbc282 89 }
mbed_official 84:f54042cbc282 90
mbed_official 84:f54042cbc282 91 void pwmout_free(pwmout_t* obj) {
mbed_official 84:f54042cbc282 92 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 84:f54042cbc282 93 TIM_DeInit(tim);
mbed_official 84:f54042cbc282 94 }
mbed_official 84:f54042cbc282 95
mbed_official 84:f54042cbc282 96 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 84:f54042cbc282 97 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 84:f54042cbc282 98 TIM_OCInitTypeDef TIM_OCInitStructure;
mbed_official 84:f54042cbc282 99
mbed_official 84:f54042cbc282 100 if (value < 0.0) {
mbed_official 84:f54042cbc282 101 value = 0.0;
mbed_official 84:f54042cbc282 102 } else if (value > 1.0) {
mbed_official 84:f54042cbc282 103 value = 1.0;
mbed_official 84:f54042cbc282 104 }
mbed_official 84:f54042cbc282 105
mbed_official 84:f54042cbc282 106 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 84:f54042cbc282 107
mbed_official 164:90c6009cba07 108 // Configure channels
mbed_official 164:90c6009cba07 109 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
mbed_official 164:90c6009cba07 110 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
mbed_official 164:90c6009cba07 111 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
mbed_official 164:90c6009cba07 112 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_Low;
mbed_official 164:90c6009cba07 113 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
mbed_official 164:90c6009cba07 114 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
mbed_official 84:f54042cbc282 115
mbed_official 164:90c6009cba07 116 switch (obj->pin) {
mbed_official 164:90c6009cba07 117 // Channels 1
mbed_official 164:90c6009cba07 118 case PA_4:
mbed_official 164:90c6009cba07 119 case PA_6:
mbed_official 164:90c6009cba07 120 case PA_7:
mbed_official 164:90c6009cba07 121 case PB_1:
mbed_official 164:90c6009cba07 122 case PB_4:
mbed_official 164:90c6009cba07 123 case PB_8:
mbed_official 164:90c6009cba07 124 case PB_9:
mbed_official 164:90c6009cba07 125 case PB_14:
mbed_official 164:90c6009cba07 126 case PC_6:
mbed_official 164:90c6009cba07 127 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 164:90c6009cba07 128 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 164:90c6009cba07 129 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 164:90c6009cba07 130 break;
mbed_official 164:90c6009cba07 131 // Channels 1N
mbed_official 164:90c6009cba07 132 case PB_6:
mbed_official 164:90c6009cba07 133 case PB_7:
mbed_official 164:90c6009cba07 134 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 164:90c6009cba07 135 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 164:90c6009cba07 136 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 164:90c6009cba07 137 break;
mbed_official 164:90c6009cba07 138 // Channels 2
mbed_official 164:90c6009cba07 139 // case PA_7:
mbed_official 164:90c6009cba07 140 case PB_5:
mbed_official 164:90c6009cba07 141 case PC_7:
mbed_official 164:90c6009cba07 142 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 164:90c6009cba07 143 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 164:90c6009cba07 144 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 164:90c6009cba07 145 break;
mbed_official 164:90c6009cba07 146 // Channels 3
mbed_official 164:90c6009cba07 147 case PB_0:
mbed_official 164:90c6009cba07 148 case PC_8:
mbed_official 164:90c6009cba07 149 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 164:90c6009cba07 150 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 164:90c6009cba07 151 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 164:90c6009cba07 152 break;
mbed_official 164:90c6009cba07 153 // Channels 4
mbed_official 164:90c6009cba07 154 // case PB_1:
mbed_official 164:90c6009cba07 155 case PC_9:
mbed_official 164:90c6009cba07 156 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 164:90c6009cba07 157 TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 164:90c6009cba07 158 TIM_OC4Init(tim, &TIM_OCInitStructure);
mbed_official 164:90c6009cba07 159 break;
mbed_official 164:90c6009cba07 160 default:
mbed_official 164:90c6009cba07 161 return;
mbed_official 164:90c6009cba07 162 }
mbed_official 84:f54042cbc282 163
mbed_official 164:90c6009cba07 164 TIM_CtrlPWMOutputs(tim, ENABLE);
mbed_official 164:90c6009cba07 165
mbed_official 84:f54042cbc282 166 }
mbed_official 84:f54042cbc282 167
mbed_official 84:f54042cbc282 168 float pwmout_read(pwmout_t* obj) {
mbed_official 84:f54042cbc282 169 float value = 0;
mbed_official 84:f54042cbc282 170 if (obj->period > 0) {
mbed_official 84:f54042cbc282 171 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 84:f54042cbc282 172 }
mbed_official 84:f54042cbc282 173 return ((value > 1.0) ? (1.0) : (value));
mbed_official 84:f54042cbc282 174 }
mbed_official 84:f54042cbc282 175
mbed_official 84:f54042cbc282 176 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 84:f54042cbc282 177 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 84:f54042cbc282 178 }
mbed_official 84:f54042cbc282 179
mbed_official 84:f54042cbc282 180 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 84:f54042cbc282 181 pwmout_period_us(obj, ms * 1000);
mbed_official 84:f54042cbc282 182 }
mbed_official 84:f54042cbc282 183
mbed_official 84:f54042cbc282 184 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 84:f54042cbc282 185 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 84:f54042cbc282 186 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 84:f54042cbc282 187 float dc = pwmout_read(obj);
mbed_official 84:f54042cbc282 188
mbed_official 84:f54042cbc282 189 TIM_Cmd(tim, DISABLE);
mbed_official 84:f54042cbc282 190
mbed_official 84:f54042cbc282 191 obj->period = us;
mbed_official 84:f54042cbc282 192
mbed_official 84:f54042cbc282 193 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
mbed_official 84:f54042cbc282 194 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 84:f54042cbc282 195 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 84:f54042cbc282 196 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 84:f54042cbc282 197 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
mbed_official 84:f54042cbc282 198
mbed_official 84:f54042cbc282 199 // Set duty cycle again
mbed_official 84:f54042cbc282 200 pwmout_write(obj, dc);
mbed_official 84:f54042cbc282 201
mbed_official 84:f54042cbc282 202 TIM_ARRPreloadConfig(tim, ENABLE);
mbed_official 84:f54042cbc282 203
mbed_official 84:f54042cbc282 204 TIM_Cmd(tim, ENABLE);
mbed_official 84:f54042cbc282 205 }
mbed_official 84:f54042cbc282 206
mbed_official 84:f54042cbc282 207 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 84:f54042cbc282 208 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 84:f54042cbc282 209 }
mbed_official 84:f54042cbc282 210
mbed_official 84:f54042cbc282 211 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 84:f54042cbc282 212 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 84:f54042cbc282 213 }
mbed_official 84:f54042cbc282 214
mbed_official 84:f54042cbc282 215 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 84:f54042cbc282 216 float value = (float)us / (float)obj->period;
mbed_official 84:f54042cbc282 217 pwmout_write(obj, value);
mbed_official 84:f54042cbc282 218 }
mbed_official 166:cb4253f91ada 219
mbed_official 166:cb4253f91ada 220 #endif