marcus chiou / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F429ZI/pwmout_api.c@428:4ddf7f7eabbb, 2014-12-08 (annotated)

Committer:
mbed_official
Date:
Mon Dec 08 07:30:07 2014 +0000
Revision:
428:4ddf7f7eabbb
Parent:
344:ed24f9926218 
Synchronized with git revision 3413e21e59b8b0d03c0addac95b1ead87f0b7965



Full URL: https://github.com/mbedmicro/mbed/commit/3413e21e59b8b0d03c0addac95b1ead87f0b7965/



Gitignore - Ignore cscope and vim swap files

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UserRevisionLine numberNew contents of line
mbed_official 340:28d1f895c6fe 1 /* mbed Microcontroller Library
mbed_official 340:28d1f895c6fe 2 *******************************************************************************
mbed_official 340:28d1f895c6fe 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 340:28d1f895c6fe 4 * All rights reserved.
mbed_official 340:28d1f895c6fe 5 *
mbed_official 340:28d1f895c6fe 6 * Redistribution and use in source and binary forms, with or without
mbed_official 340:28d1f895c6fe 7 * modification, are permitted provided that the following conditions are met:
mbed_official 340:28d1f895c6fe 8 *
mbed_official 340:28d1f895c6fe 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 340:28d1f895c6fe 10 * this list of conditions and the following disclaimer.
mbed_official 340:28d1f895c6fe 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 340:28d1f895c6fe 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 340:28d1f895c6fe 13 * and/or other materials provided with the distribution.
mbed_official 340:28d1f895c6fe 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 340:28d1f895c6fe 15 * may be used to endorse or promote products derived from this software
mbed_official 340:28d1f895c6fe 16 * without specific prior written permission.
mbed_official 340:28d1f895c6fe 17 *
mbed_official 340:28d1f895c6fe 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 340:28d1f895c6fe 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 340:28d1f895c6fe 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 340:28d1f895c6fe 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 340:28d1f895c6fe 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 340:28d1f895c6fe 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 340:28d1f895c6fe 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 340:28d1f895c6fe 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 340:28d1f895c6fe 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 340:28d1f895c6fe 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 340:28d1f895c6fe 28 *******************************************************************************
mbed_official 340:28d1f895c6fe 29 */
mbed_official 340:28d1f895c6fe 30 #include "pwmout_api.h"
mbed_official 340:28d1f895c6fe 31
mbed_official 340:28d1f895c6fe 32 #if DEVICE_PWMOUT
mbed_official 340:28d1f895c6fe 33
mbed_official 340:28d1f895c6fe 34 #include "cmsis.h"
mbed_official 340:28d1f895c6fe 35 #include "pinmap.h"
mbed_official 340:28d1f895c6fe 36 #include "mbed_error.h"
mbed_official 428:4ddf7f7eabbb 37 #include "PeripheralPins.h"
mbed_official 340:28d1f895c6fe 38
mbed_official 340:28d1f895c6fe 39 static TIM_HandleTypeDef TimHandle;
mbed_official 340:28d1f895c6fe 40
mbed_official 340:28d1f895c6fe 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 340:28d1f895c6fe 42 {
mbed_official 340:28d1f895c6fe 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 340:28d1f895c6fe 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 340:28d1f895c6fe 45
mbed_official 340:28d1f895c6fe 46 if (obj->pwm == (PWMName)NC) {
mbed_official 340:28d1f895c6fe 47 error("PWM error: pinout mapping failed.");
mbed_official 340:28d1f895c6fe 48 }
mbed_official 340:28d1f895c6fe 49
mbed_official 340:28d1f895c6fe 50 // Enable TIM clock
mbed_official 340:28d1f895c6fe 51 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 52 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 53 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 54 if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 55 if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 56 if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 57 if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 58
mbed_official 340:28d1f895c6fe 59 // Configure GPIO
mbed_official 340:28d1f895c6fe 60 pinmap_pinout(pin, PinMap_PWM);
mbed_official 340:28d1f895c6fe 61
mbed_official 340:28d1f895c6fe 62 obj->pin = pin;
mbed_official 340:28d1f895c6fe 63 obj->period = 0;
mbed_official 340:28d1f895c6fe 64 obj->pulse = 0;
mbed_official 340:28d1f895c6fe 65
mbed_official 340:28d1f895c6fe 66 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 340:28d1f895c6fe 67 }
mbed_official 340:28d1f895c6fe 68
mbed_official 340:28d1f895c6fe 69 void pwmout_free(pwmout_t* obj)
mbed_official 340:28d1f895c6fe 70 {
mbed_official 340:28d1f895c6fe 71 // Configure GPIO
mbed_official 340:28d1f895c6fe 72 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 340:28d1f895c6fe 73 }
mbed_official 340:28d1f895c6fe 74
mbed_official 340:28d1f895c6fe 75 void pwmout_write(pwmout_t* obj, float value)
mbed_official 340:28d1f895c6fe 76 {
mbed_official 340:28d1f895c6fe 77 TIM_OC_InitTypeDef sConfig;
mbed_official 340:28d1f895c6fe 78 int channel = 0;
mbed_official 340:28d1f895c6fe 79 int complementary_channel = 0;
mbed_official 340:28d1f895c6fe 80
mbed_official 340:28d1f895c6fe 81 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 340:28d1f895c6fe 82
mbed_official 340:28d1f895c6fe 83 if (value < (float)0.0) {
mbed_official 340:28d1f895c6fe 84 value = 0.0;
mbed_official 340:28d1f895c6fe 85 } else if (value > (float)1.0) {
mbed_official 340:28d1f895c6fe 86 value = 1.0;
mbed_official 340:28d1f895c6fe 87 }
mbed_official 340:28d1f895c6fe 88
mbed_official 340:28d1f895c6fe 89 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 340:28d1f895c6fe 90
mbed_official 340:28d1f895c6fe 91 // Configure channels
mbed_official 340:28d1f895c6fe 92 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 340:28d1f895c6fe 93 sConfig.Pulse = obj->pulse;
mbed_official 340:28d1f895c6fe 94 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 340:28d1f895c6fe 95 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 340:28d1f895c6fe 96 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 340:28d1f895c6fe 97 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 340:28d1f895c6fe 98 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 340:28d1f895c6fe 99
mbed_official 340:28d1f895c6fe 100 switch (obj->pin) {
mbed_official 340:28d1f895c6fe 101
mbed_official 340:28d1f895c6fe 102 // Channels 1
mbed_official 340:28d1f895c6fe 103 case PA_0:
mbed_official 340:28d1f895c6fe 104 case PA_5:
mbed_official 340:28d1f895c6fe 105 case PA_6:
mbed_official 340:28d1f895c6fe 106 case PA_8:
mbed_official 340:28d1f895c6fe 107 case PA_15:
mbed_official 340:28d1f895c6fe 108 case PB_4:
mbed_official 340:28d1f895c6fe 109 case PB_6:
mbed_official 340:28d1f895c6fe 110 case PC_6:
mbed_official 340:28d1f895c6fe 111 channel = TIM_CHANNEL_1;
mbed_official 340:28d1f895c6fe 112 break;
mbed_official 340:28d1f895c6fe 113
mbed_official 340:28d1f895c6fe 114 // Channels 1N
mbed_official 340:28d1f895c6fe 115 case PA_7:
mbed_official 340:28d1f895c6fe 116 case PB_13:
mbed_official 340:28d1f895c6fe 117 channel = TIM_CHANNEL_1;
mbed_official 340:28d1f895c6fe 118 complementary_channel = 1;
mbed_official 340:28d1f895c6fe 119 break;
mbed_official 340:28d1f895c6fe 120
mbed_official 340:28d1f895c6fe 121 // Channels 2
mbed_official 340:28d1f895c6fe 122 case PA_1:
mbed_official 340:28d1f895c6fe 123 case PA_9:
mbed_official 340:28d1f895c6fe 124 case PB_3:
mbed_official 340:28d1f895c6fe 125 case PB_5:
mbed_official 340:28d1f895c6fe 126 case PB_7:
mbed_official 340:28d1f895c6fe 127 case PC_7:
mbed_official 340:28d1f895c6fe 128 channel = TIM_CHANNEL_2;
mbed_official 340:28d1f895c6fe 129 break;
mbed_official 340:28d1f895c6fe 130
mbed_official 340:28d1f895c6fe 131 // Channels 2N
mbed_official 340:28d1f895c6fe 132 case PB_0:
mbed_official 340:28d1f895c6fe 133 case PB_14:
mbed_official 340:28d1f895c6fe 134 channel = TIM_CHANNEL_2;
mbed_official 340:28d1f895c6fe 135 complementary_channel = 1;
mbed_official 340:28d1f895c6fe 136 break;
mbed_official 340:28d1f895c6fe 137
mbed_official 340:28d1f895c6fe 138 // Channels 3
mbed_official 340:28d1f895c6fe 139 case PA_2:
mbed_official 340:28d1f895c6fe 140 case PA_10:
mbed_official 340:28d1f895c6fe 141 case PB_8:
mbed_official 340:28d1f895c6fe 142 case PB_10:
mbed_official 340:28d1f895c6fe 143 case PC_8:
mbed_official 340:28d1f895c6fe 144 channel = TIM_CHANNEL_3;
mbed_official 340:28d1f895c6fe 145 break;
mbed_official 340:28d1f895c6fe 146
mbed_official 340:28d1f895c6fe 147 // Channels 3N
mbed_official 340:28d1f895c6fe 148 case PB_1:
mbed_official 340:28d1f895c6fe 149 case PB_15:
mbed_official 340:28d1f895c6fe 150 channel = TIM_CHANNEL_3;
mbed_official 340:28d1f895c6fe 151 complementary_channel = 1;
mbed_official 340:28d1f895c6fe 152 break;
mbed_official 340:28d1f895c6fe 153
mbed_official 340:28d1f895c6fe 154 // Channels 4
mbed_official 340:28d1f895c6fe 155 case PA_3:
mbed_official 340:28d1f895c6fe 156 case PA_11:
mbed_official 340:28d1f895c6fe 157 case PB_9:
mbed_official 340:28d1f895c6fe 158 case PC_9:
mbed_official 340:28d1f895c6fe 159 channel = TIM_CHANNEL_4;
mbed_official 340:28d1f895c6fe 160 break;
mbed_official 340:28d1f895c6fe 161
mbed_official 340:28d1f895c6fe 162 default:
mbed_official 340:28d1f895c6fe 163 return;
mbed_official 340:28d1f895c6fe 164 }
mbed_official 340:28d1f895c6fe 165
mbed_official 340:28d1f895c6fe 166 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 340:28d1f895c6fe 167 if (complementary_channel) {
mbed_official 340:28d1f895c6fe 168 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 340:28d1f895c6fe 169 } else {
mbed_official 340:28d1f895c6fe 170 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 340:28d1f895c6fe 171 }
mbed_official 340:28d1f895c6fe 172 }
mbed_official 340:28d1f895c6fe 173
mbed_official 340:28d1f895c6fe 174 float pwmout_read(pwmout_t* obj)
mbed_official 340:28d1f895c6fe 175 {
mbed_official 340:28d1f895c6fe 176 float value = 0;
mbed_official 340:28d1f895c6fe 177 if (obj->period > 0) {
mbed_official 340:28d1f895c6fe 178 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 340:28d1f895c6fe 179 }
mbed_official 340:28d1f895c6fe 180 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 340:28d1f895c6fe 181 }
mbed_official 340:28d1f895c6fe 182
mbed_official 340:28d1f895c6fe 183 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 340:28d1f895c6fe 184 {
mbed_official 340:28d1f895c6fe 185 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 340:28d1f895c6fe 186 }
mbed_official 340:28d1f895c6fe 187
mbed_official 340:28d1f895c6fe 188 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 340:28d1f895c6fe 189 {
mbed_official 340:28d1f895c6fe 190 pwmout_period_us(obj, ms * 1000);
mbed_official 340:28d1f895c6fe 191 }
mbed_official 340:28d1f895c6fe 192
mbed_official 340:28d1f895c6fe 193 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 340:28d1f895c6fe 194 {
mbed_official 340:28d1f895c6fe 195 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 340:28d1f895c6fe 196
mbed_official 340:28d1f895c6fe 197 float dc = pwmout_read(obj);
mbed_official 340:28d1f895c6fe 198
mbed_official 340:28d1f895c6fe 199 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 340:28d1f895c6fe 200
mbed_official 340:28d1f895c6fe 201 // Update the SystemCoreClock variable
mbed_official 340:28d1f895c6fe 202 SystemCoreClockUpdate();
mbed_official 340:28d1f895c6fe 203
mbed_official 340:28d1f895c6fe 204 TimHandle.Init.Period = us - 1;
mbed_official 340:28d1f895c6fe 205 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 340:28d1f895c6fe 206 TimHandle.Init.ClockDivision = 0;
mbed_official 340:28d1f895c6fe 207 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 340:28d1f895c6fe 208 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 340:28d1f895c6fe 209
mbed_official 340:28d1f895c6fe 210 // Set duty cycle again
mbed_official 340:28d1f895c6fe 211 pwmout_write(obj, dc);
mbed_official 340:28d1f895c6fe 212
mbed_official 340:28d1f895c6fe 213 // Save for future use
mbed_official 340:28d1f895c6fe 214 obj->period = us;
mbed_official 340:28d1f895c6fe 215
mbed_official 340:28d1f895c6fe 216 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 340:28d1f895c6fe 217 }
mbed_official 340:28d1f895c6fe 218
mbed_official 340:28d1f895c6fe 219 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 340:28d1f895c6fe 220 {
mbed_official 340:28d1f895c6fe 221 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 340:28d1f895c6fe 222 }
mbed_official 340:28d1f895c6fe 223
mbed_official 340:28d1f895c6fe 224 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 340:28d1f895c6fe 225 {
mbed_official 340:28d1f895c6fe 226 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 340:28d1f895c6fe 227 }
mbed_official 340:28d1f895c6fe 228
mbed_official 340:28d1f895c6fe 229 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 340:28d1f895c6fe 230 {
mbed_official 340:28d1f895c6fe 231 float value = (float)us / (float)obj->period;
mbed_official 340:28d1f895c6fe 232 pwmout_write(obj, value);
mbed_official 340:28d1f895c6fe 233 }
mbed_official 340:28d1f895c6fe 234
mbed_official 340:28d1f895c6fe 235 #endif