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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F051R8/pwmout_api.c@268:402bcc0c870b, 2014-07-29 (annotated)

Committer:
mbed_official
Date:
Tue Jul 29 19:00:07 2014 +0100
Revision:
268:402bcc0c870b
Parent:
240:9a7c54113eaf
Child:
423:560d1a9f3083
Synchronized with git revision 490d1a6606b3138f165c5edf2f2370ca616587c0



Full URL: https://github.com/mbedmicro/mbed/commit/490d1a6606b3138f165c5edf2f2370ca616587c0/



[LPC1114] Sleep fix + some device.h settings

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 130:1dec54e4aec3 1 /* mbed Microcontroller Library
mbed_official 130:1dec54e4aec3 2 *******************************************************************************
mbed_official 130:1dec54e4aec3 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 130:1dec54e4aec3 4 * All rights reserved.
mbed_official 130:1dec54e4aec3 5 *
mbed_official 130:1dec54e4aec3 6 * Redistribution and use in source and binary forms, with or without
mbed_official 130:1dec54e4aec3 7 * modification, are permitted provided that the following conditions are met:
mbed_official 130:1dec54e4aec3 8 *
mbed_official 130:1dec54e4aec3 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 130:1dec54e4aec3 10 * this list of conditions and the following disclaimer.
mbed_official 130:1dec54e4aec3 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 130:1dec54e4aec3 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 130:1dec54e4aec3 13 * and/or other materials provided with the distribution.
mbed_official 130:1dec54e4aec3 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 130:1dec54e4aec3 15 * may be used to endorse or promote products derived from this software
mbed_official 130:1dec54e4aec3 16 * without specific prior written permission.
mbed_official 130:1dec54e4aec3 17 *
mbed_official 130:1dec54e4aec3 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 130:1dec54e4aec3 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 130:1dec54e4aec3 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 130:1dec54e4aec3 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 130:1dec54e4aec3 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 130:1dec54e4aec3 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 130:1dec54e4aec3 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 130:1dec54e4aec3 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 130:1dec54e4aec3 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 130:1dec54e4aec3 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 130:1dec54e4aec3 28 *******************************************************************************
mbed_official 130:1dec54e4aec3 29 */
mbed_official 240:9a7c54113eaf 30 #include "mbed_assert.h"
mbed_official 130:1dec54e4aec3 31 #include "pwmout_api.h"
mbed_official 130:1dec54e4aec3 32
mbed_official 240:9a7c54113eaf 33 #if DEVICE_PWMOUT
mbed_official 240:9a7c54113eaf 34
mbed_official 130:1dec54e4aec3 35 #include "cmsis.h"
mbed_official 130:1dec54e4aec3 36 #include "pinmap.h"
mbed_official 130:1dec54e4aec3 37
mbed_official 240:9a7c54113eaf 38 // TIM1 cannot be used because already used by the us_ticker
mbed_official 130:1dec54e4aec3 39 static const PinMap PinMap_PWM[] = {
mbed_official 240:9a7c54113eaf 40 {PA_4, TIM_14, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_4)}, // TIM14_CH1
mbed_official 240:9a7c54113eaf 41 {PA_6, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH1
mbed_official 240:9a7c54113eaf 42 // {PA_6, TIM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_5)}, // TIM16_CH1
mbed_official 240:9a7c54113eaf 43 {PA_7, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH2
mbed_official 240:9a7c54113eaf 44 // {PA_7, TIM_14, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_4)}, // TIM14_CH1
mbed_official 240:9a7c54113eaf 45 // {PA_7, TIM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_5)}, // TIM17_CH1
mbed_official 240:9a7c54113eaf 46 {PB_0, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH3
mbed_official 240:9a7c54113eaf 47 {PB_1, TIM_14, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM14_CH1
mbed_official 240:9a7c54113eaf 48 // {PB_1, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH4
mbed_official 240:9a7c54113eaf 49 {PB_4, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH1
mbed_official 240:9a7c54113eaf 50 {PB_5, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM3_CH2
mbed_official 240:9a7c54113eaf 51 {PB_6, TIM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_2)}, // TIM16_CH1N
mbed_official 240:9a7c54113eaf 52 {PB_7, TIM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_2)}, // TIM17_CH1N
mbed_official 240:9a7c54113eaf 53 {PB_8, TIM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_2)}, // TIM16_CH1
mbed_official 240:9a7c54113eaf 54 {PB_9, TIM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_2)}, // TIM17_CH1
mbed_official 240:9a7c54113eaf 55 {PB_14, TIM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM15_CH1
mbed_official 240:9a7c54113eaf 56 {PB_15, TIM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_1)}, // TIM15_CH2
mbed_official 240:9a7c54113eaf 57 // {PB_15, TIM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_3)}, // TIM15_CH1N
mbed_official 240:9a7c54113eaf 58 {PC_6, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM3_CH1
mbed_official 130:1dec54e4aec3 59 {PC_7, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM3_CH2
mbed_official 240:9a7c54113eaf 60 {PC_8, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM3_CH3
mbed_official 240:9a7c54113eaf 61 {PC_9, TIM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_NOPULL, GPIO_AF_0)}, // TIM3_CH4
mbed_official 130:1dec54e4aec3 62 {NC, NC, 0}
mbed_official 130:1dec54e4aec3 63 };
mbed_official 130:1dec54e4aec3 64
mbed_official 130:1dec54e4aec3 65 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 130:1dec54e4aec3 66 // Get the peripheral name from the pin and assign it to the object
mbed_official 130:1dec54e4aec3 67 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 240:9a7c54113eaf 68 MBED_ASSERT(obj->pwm != (PWMName)NC);
mbed_official 130:1dec54e4aec3 69
mbed_official 130:1dec54e4aec3 70 // Enable TIM clock
mbed_official 130:1dec54e4aec3 71 if (obj->pwm == TIM_3) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
mbed_official 130:1dec54e4aec3 72 if (obj->pwm == TIM_14) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14, ENABLE);
mbed_official 240:9a7c54113eaf 73 if (obj->pwm == TIM_15) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM15, ENABLE);
mbed_official 130:1dec54e4aec3 74 if (obj->pwm == TIM_16) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16, ENABLE);
mbed_official 240:9a7c54113eaf 75 if (obj->pwm == TIM_17) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM17, ENABLE);
mbed_official 130:1dec54e4aec3 76
mbed_official 130:1dec54e4aec3 77 // Configure GPIO
mbed_official 130:1dec54e4aec3 78 pinmap_pinout(pin, PinMap_PWM);
mbed_official 130:1dec54e4aec3 79
mbed_official 130:1dec54e4aec3 80 obj->pin = pin;
mbed_official 130:1dec54e4aec3 81 obj->period = 0;
mbed_official 130:1dec54e4aec3 82 obj->pulse = 0;
mbed_official 130:1dec54e4aec3 83
mbed_official 130:1dec54e4aec3 84 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 130:1dec54e4aec3 85 }
mbed_official 130:1dec54e4aec3 86
mbed_official 130:1dec54e4aec3 87 void pwmout_free(pwmout_t* obj) {
mbed_official 240:9a7c54113eaf 88 // Configure GPIOs
mbed_official 240:9a7c54113eaf 89 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 130:1dec54e4aec3 90 }
mbed_official 130:1dec54e4aec3 91
mbed_official 130:1dec54e4aec3 92 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 130:1dec54e4aec3 93 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 130:1dec54e4aec3 94 TIM_OCInitTypeDef TIM_OCInitStructure;
mbed_official 130:1dec54e4aec3 95
mbed_official 130:1dec54e4aec3 96 if (value < 0.0) {
mbed_official 130:1dec54e4aec3 97 value = 0.0;
mbed_official 130:1dec54e4aec3 98 } else if (value > 1.0) {
mbed_official 130:1dec54e4aec3 99 value = 1.0;
mbed_official 130:1dec54e4aec3 100 }
mbed_official 130:1dec54e4aec3 101
mbed_official 130:1dec54e4aec3 102 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 130:1dec54e4aec3 103
mbed_official 240:9a7c54113eaf 104 // Configure channels
mbed_official 130:1dec54e4aec3 105 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
mbed_official 130:1dec54e4aec3 106 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
mbed_official 240:9a7c54113eaf 107 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
mbed_official 240:9a7c54113eaf 108 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_Low;
mbed_official 240:9a7c54113eaf 109 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
mbed_official 240:9a7c54113eaf 110 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
mbed_official 130:1dec54e4aec3 111
mbed_official 240:9a7c54113eaf 112 switch (obj->pin) {
mbed_official 240:9a7c54113eaf 113 // Channels 1
mbed_official 240:9a7c54113eaf 114 case PA_4:
mbed_official 240:9a7c54113eaf 115 case PA_6:
mbed_official 240:9a7c54113eaf 116 case PB_1:
mbed_official 240:9a7c54113eaf 117 case PB_4:
mbed_official 240:9a7c54113eaf 118 case PB_8:
mbed_official 240:9a7c54113eaf 119 case PB_9:
mbed_official 240:9a7c54113eaf 120 case PB_14:
mbed_official 240:9a7c54113eaf 121 case PC_6:
mbed_official 240:9a7c54113eaf 122 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 240:9a7c54113eaf 123 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 240:9a7c54113eaf 124 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 240:9a7c54113eaf 125 break;
mbed_official 240:9a7c54113eaf 126 // Channels 1N
mbed_official 240:9a7c54113eaf 127 case PB_6:
mbed_official 240:9a7c54113eaf 128 case PB_7:
mbed_official 240:9a7c54113eaf 129 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 130:1dec54e4aec3 130 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 130:1dec54e4aec3 131 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 240:9a7c54113eaf 132 break;
mbed_official 240:9a7c54113eaf 133 // Channels 2
mbed_official 240:9a7c54113eaf 134 case PA_7:
mbed_official 240:9a7c54113eaf 135 case PB_5:
mbed_official 240:9a7c54113eaf 136 case PC_7:
mbed_official 130:1dec54e4aec3 137 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 130:1dec54e4aec3 138 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 130:1dec54e4aec3 139 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 240:9a7c54113eaf 140 break;
mbed_official 240:9a7c54113eaf 141 // Channels 3
mbed_official 240:9a7c54113eaf 142 case PB_0:
mbed_official 240:9a7c54113eaf 143 case PC_8:
mbed_official 240:9a7c54113eaf 144 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 240:9a7c54113eaf 145 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 240:9a7c54113eaf 146 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 240:9a7c54113eaf 147 break;
mbed_official 240:9a7c54113eaf 148 // Channels 4
mbed_official 240:9a7c54113eaf 149 // case PB_1:
mbed_official 240:9a7c54113eaf 150 case PC_9:
mbed_official 240:9a7c54113eaf 151 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 240:9a7c54113eaf 152 TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 240:9a7c54113eaf 153 TIM_OC4Init(tim, &TIM_OCInitStructure);
mbed_official 240:9a7c54113eaf 154 break;
mbed_official 240:9a7c54113eaf 155 default:
mbed_official 240:9a7c54113eaf 156 return;
mbed_official 130:1dec54e4aec3 157 }
mbed_official 240:9a7c54113eaf 158
mbed_official 240:9a7c54113eaf 159 TIM_CtrlPWMOutputs(tim, ENABLE);
mbed_official 240:9a7c54113eaf 160
mbed_official 130:1dec54e4aec3 161 }
mbed_official 130:1dec54e4aec3 162
mbed_official 130:1dec54e4aec3 163 float pwmout_read(pwmout_t* obj) {
mbed_official 130:1dec54e4aec3 164 float value = 0;
mbed_official 130:1dec54e4aec3 165 if (obj->period > 0) {
mbed_official 130:1dec54e4aec3 166 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 130:1dec54e4aec3 167 }
mbed_official 130:1dec54e4aec3 168 return ((value > 1.0) ? (1.0) : (value));
mbed_official 130:1dec54e4aec3 169 }
mbed_official 130:1dec54e4aec3 170
mbed_official 130:1dec54e4aec3 171 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 130:1dec54e4aec3 172 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 130:1dec54e4aec3 173 }
mbed_official 130:1dec54e4aec3 174
mbed_official 130:1dec54e4aec3 175 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 130:1dec54e4aec3 176 pwmout_period_us(obj, ms * 1000);
mbed_official 130:1dec54e4aec3 177 }
mbed_official 130:1dec54e4aec3 178
mbed_official 130:1dec54e4aec3 179 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 130:1dec54e4aec3 180 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 130:1dec54e4aec3 181 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 130:1dec54e4aec3 182 float dc = pwmout_read(obj);
mbed_official 130:1dec54e4aec3 183
mbed_official 130:1dec54e4aec3 184 TIM_Cmd(tim, DISABLE);
mbed_official 130:1dec54e4aec3 185
mbed_official 130:1dec54e4aec3 186 obj->period = us;
mbed_official 130:1dec54e4aec3 187
mbed_official 130:1dec54e4aec3 188 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
mbed_official 130:1dec54e4aec3 189 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 130:1dec54e4aec3 190 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 130:1dec54e4aec3 191 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 130:1dec54e4aec3 192 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
mbed_official 130:1dec54e4aec3 193
mbed_official 130:1dec54e4aec3 194 // Set duty cycle again
mbed_official 130:1dec54e4aec3 195 pwmout_write(obj, dc);
mbed_official 130:1dec54e4aec3 196
mbed_official 130:1dec54e4aec3 197 TIM_ARRPreloadConfig(tim, ENABLE);
mbed_official 130:1dec54e4aec3 198
mbed_official 130:1dec54e4aec3 199 TIM_Cmd(tim, ENABLE);
mbed_official 130:1dec54e4aec3 200 }
mbed_official 130:1dec54e4aec3 201
mbed_official 130:1dec54e4aec3 202 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 130:1dec54e4aec3 203 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 130:1dec54e4aec3 204 }
mbed_official 130:1dec54e4aec3 205
mbed_official 130:1dec54e4aec3 206 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 130:1dec54e4aec3 207 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 130:1dec54e4aec3 208 }
mbed_official 130:1dec54e4aec3 209
mbed_official 130:1dec54e4aec3 210 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 130:1dec54e4aec3 211 float value = (float)us / (float)obj->period;
mbed_official 130:1dec54e4aec3 212 pwmout_write(obj, value);
mbed_official 130:1dec54e4aec3 213 }
mbed_official 240:9a7c54113eaf 214
mbed_official 240:9a7c54113eaf 215 #endif