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targets/hal/TARGET_STM/TARGET_STM32F407VG/pwmout_api.c@440:8a0b45cd594f, 2014-12-16 (annotated)

Committer:
mbed_official
Date:
Tue Dec 16 08:15:08 2014 +0000
Revision:
440:8a0b45cd594f
Parent:
428:4ddf7f7eabbb 
Synchronized with git revision 67fbbf0b635d0c0d93fbe433306c537c2ad206aa



Full URL: https://github.com/mbedmicro/mbed/commit/67fbbf0b635d0c0d93fbe433306c537c2ad206aa/



Targets: nrf51 - updating app_timer.c from Norid'c SDKv7.1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 133:d4dda5c437f0 1 /* mbed Microcontroller Library
mbed_official 133:d4dda5c437f0 2 *******************************************************************************
mbed_official 133:d4dda5c437f0 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 133:d4dda5c437f0 4 * All rights reserved.
mbed_official 133:d4dda5c437f0 5 *
mbed_official 133:d4dda5c437f0 6 * Redistribution and use in source and binary forms, with or without
mbed_official 133:d4dda5c437f0 7 * modification, are permitted provided that the following conditions are met:
mbed_official 133:d4dda5c437f0 8 *
mbed_official 133:d4dda5c437f0 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 133:d4dda5c437f0 10 * this list of conditions and the following disclaimer.
mbed_official 133:d4dda5c437f0 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 133:d4dda5c437f0 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 133:d4dda5c437f0 13 * and/or other materials provided with the distribution.
mbed_official 133:d4dda5c437f0 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 133:d4dda5c437f0 15 * may be used to endorse or promote products derived from this software
mbed_official 133:d4dda5c437f0 16 * without specific prior written permission.
mbed_official 133:d4dda5c437f0 17 *
mbed_official 133:d4dda5c437f0 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 133:d4dda5c437f0 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 133:d4dda5c437f0 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 133:d4dda5c437f0 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 133:d4dda5c437f0 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 133:d4dda5c437f0 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 133:d4dda5c437f0 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 133:d4dda5c437f0 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 133:d4dda5c437f0 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 133:d4dda5c437f0 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 133:d4dda5c437f0 28 *******************************************************************************
mbed_official 133:d4dda5c437f0 29 */
mbed_official 133:d4dda5c437f0 30 #include "pwmout_api.h"
mbed_official 133:d4dda5c437f0 31
mbed_official 242:7074e42da0b2 32 #if DEVICE_PWMOUT
mbed_official 242:7074e42da0b2 33
mbed_official 133:d4dda5c437f0 34 #include "cmsis.h"
mbed_official 133:d4dda5c437f0 35 #include "pinmap.h"
mbed_official 285:31249416b6f9 36 #include "mbed_error.h"
mbed_official 428:4ddf7f7eabbb 37 #include "PeripheralPins.h"
mbed_official 133:d4dda5c437f0 38
mbed_official 133:d4dda5c437f0 39 static TIM_HandleTypeDef TimHandle;
mbed_official 428:4ddf7f7eabbb 40
mbed_official 242:7074e42da0b2 41 static uint8_t ClockDivider;
mbed_official 242:7074e42da0b2 42 /* 0, 1, 2, 3, 4, 5, 6, 7 */
mbed_official 242:7074e42da0b2 43 const uint8_t APBxPrescTable[]={ 0, 0, 0, 0, 1, 2, 3, 4 };
mbed_official 242:7074e42da0b2 44 extern const uint8_t AHBPrescTable[];
mbed_official 133:d4dda5c437f0 45
mbed_official 133:d4dda5c437f0 46 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 133:d4dda5c437f0 47 // Get the peripheral name from the pin and assign it to the object
mbed_official 133:d4dda5c437f0 48 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 242:7074e42da0b2 49
mbed_official 242:7074e42da0b2 50 if (obj->pwm == (PWMName)NC) {
mbed_official 242:7074e42da0b2 51 error("PWM error: pinout mapping failed.");
mbed_official 242:7074e42da0b2 52 }
mbed_official 227:7bd0639b8911 53
mbed_official 133:d4dda5c437f0 54 // Enable TIM clock
mbed_official 242:7074e42da0b2 55 /* APB1 Timers */
mbed_official 133:d4dda5c437f0 56 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 133:d4dda5c437f0 57 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 133:d4dda5c437f0 58 if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
mbed_official 242:7074e42da0b2 59 /* APB2 Timers */
mbed_official 242:7074e42da0b2 60 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 242:7074e42da0b2 61 if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
mbed_official 133:d4dda5c437f0 62 if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
mbed_official 133:d4dda5c437f0 63 if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
mbed_official 242:7074e42da0b2 64 /* Decide APBx divider for timer base clock
mbed_official 242:7074e42da0b2 65 * Auto detect the Clockdivider value according to AHB,APB1 and APB2 prescaler register.
mbed_official 242:7074e42da0b2 66 */
mbed_official 242:7074e42da0b2 67 ClockDivider = AHBPrescTable[ ( ( RCC->CFGR & RCC_CFGR_HPRE ) >> 4 ) ];
mbed_official 242:7074e42da0b2 68 switch( obj->pwm ) {
mbed_official 242:7074e42da0b2 69 /* APB1 low clock */
mbed_official 242:7074e42da0b2 70 case PWM_2:
mbed_official 242:7074e42da0b2 71 case PWM_3:
mbed_official 242:7074e42da0b2 72 case PWM_4:
mbed_official 242:7074e42da0b2 73 ClockDivider += APBxPrescTable[ ( (RCC->CFGR & RCC_CFGR_PPRE1 ) >> 13 ) ];
mbed_official 242:7074e42da0b2 74 break;
mbed_official 242:7074e42da0b2 75 /* APB2 fast clock */
mbed_official 242:7074e42da0b2 76 case PWM_1:
mbed_official 242:7074e42da0b2 77 case PWM_9:
mbed_official 242:7074e42da0b2 78 case PWM_10:
mbed_official 242:7074e42da0b2 79 case PWM_11:
mbed_official 242:7074e42da0b2 80 ClockDivider += APBxPrescTable[ ( (RCC->CFGR & RCC_CFGR_PPRE2 ) >> 10 ) ];
mbed_official 242:7074e42da0b2 81 break;
mbed_official 242:7074e42da0b2 82 default:
mbed_official 242:7074e42da0b2 83 break;
mbed_official 242:7074e42da0b2 84 }
mbed_official 133:d4dda5c437f0 85
mbed_official 133:d4dda5c437f0 86 // Configure GPIO
mbed_official 133:d4dda5c437f0 87 pinmap_pinout(pin, PinMap_PWM);
mbed_official 133:d4dda5c437f0 88
mbed_official 133:d4dda5c437f0 89 obj->pin = pin;
mbed_official 133:d4dda5c437f0 90 obj->period = 0;
mbed_official 133:d4dda5c437f0 91 obj->pulse = 0;
mbed_official 133:d4dda5c437f0 92
mbed_official 133:d4dda5c437f0 93 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 133:d4dda5c437f0 94 }
mbed_official 133:d4dda5c437f0 95
mbed_official 133:d4dda5c437f0 96 void pwmout_free(pwmout_t* obj) {
mbed_official 242:7074e42da0b2 97 // Configure GPIO
mbed_official 133:d4dda5c437f0 98 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 133:d4dda5c437f0 99 }
mbed_official 133:d4dda5c437f0 100
mbed_official 133:d4dda5c437f0 101 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 133:d4dda5c437f0 102 TIM_OC_InitTypeDef sConfig;
mbed_official 133:d4dda5c437f0 103 int channel = 0;
mbed_official 133:d4dda5c437f0 104 int complementary_channel = 0;
mbed_official 133:d4dda5c437f0 105
mbed_official 133:d4dda5c437f0 106 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 133:d4dda5c437f0 107
mbed_official 133:d4dda5c437f0 108 if (value < (float)0.0) {
mbed_official 133:d4dda5c437f0 109 value = 0.0;
mbed_official 133:d4dda5c437f0 110 } else if (value > (float)1.0) {
mbed_official 133:d4dda5c437f0 111 value = 1.0;
mbed_official 133:d4dda5c437f0 112 }
mbed_official 133:d4dda5c437f0 113
mbed_official 133:d4dda5c437f0 114 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 133:d4dda5c437f0 115
mbed_official 133:d4dda5c437f0 116 // Configure channels
mbed_official 133:d4dda5c437f0 117 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 133:d4dda5c437f0 118 sConfig.Pulse = obj->pulse;
mbed_official 133:d4dda5c437f0 119 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 133:d4dda5c437f0 120 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 133:d4dda5c437f0 121 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 133:d4dda5c437f0 122 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 133:d4dda5c437f0 123 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 133:d4dda5c437f0 124
mbed_official 133:d4dda5c437f0 125 switch (obj->pin) {
mbed_official 133:d4dda5c437f0 126 // Channels 1
mbed_official 133:d4dda5c437f0 127 case PA_0:
mbed_official 133:d4dda5c437f0 128 case PA_5:
mbed_official 133:d4dda5c437f0 129 case PA_6:
mbed_official 133:d4dda5c437f0 130 case PA_8:
mbed_official 133:d4dda5c437f0 131 case PA_15:
mbed_official 133:d4dda5c437f0 132 case PB_4:
mbed_official 133:d4dda5c437f0 133 case PB_6:
mbed_official 133:d4dda5c437f0 134 case PC_6:
mbed_official 133:d4dda5c437f0 135 channel = TIM_CHANNEL_1;
mbed_official 133:d4dda5c437f0 136 break;
mbed_official 133:d4dda5c437f0 137 // Channels 1N
mbed_official 133:d4dda5c437f0 138 case PA_7:
mbed_official 133:d4dda5c437f0 139 case PB_13:
mbed_official 133:d4dda5c437f0 140 channel = TIM_CHANNEL_1;
mbed_official 133:d4dda5c437f0 141 complementary_channel = 1;
mbed_official 133:d4dda5c437f0 142 break;
mbed_official 133:d4dda5c437f0 143 // Channels 2
mbed_official 133:d4dda5c437f0 144 case PA_1:
mbed_official 133:d4dda5c437f0 145 case PA_9:
mbed_official 133:d4dda5c437f0 146 case PB_3:
mbed_official 133:d4dda5c437f0 147 case PB_5:
mbed_official 133:d4dda5c437f0 148 case PB_7:
mbed_official 133:d4dda5c437f0 149 case PC_7:
mbed_official 133:d4dda5c437f0 150 channel = TIM_CHANNEL_2;
mbed_official 133:d4dda5c437f0 151 break;
mbed_official 133:d4dda5c437f0 152 // Channels 2N
mbed_official 133:d4dda5c437f0 153 case PB_0:
mbed_official 133:d4dda5c437f0 154 case PB_14:
mbed_official 133:d4dda5c437f0 155 channel = TIM_CHANNEL_2;
mbed_official 133:d4dda5c437f0 156 complementary_channel = 1;
mbed_official 133:d4dda5c437f0 157 break;
mbed_official 133:d4dda5c437f0 158 // Channels 3
mbed_official 133:d4dda5c437f0 159 case PA_2:
mbed_official 133:d4dda5c437f0 160 case PA_10:
mbed_official 133:d4dda5c437f0 161 case PB_8:
mbed_official 133:d4dda5c437f0 162 case PB_10:
mbed_official 133:d4dda5c437f0 163 case PC_8:
mbed_official 133:d4dda5c437f0 164 channel = TIM_CHANNEL_3;
mbed_official 133:d4dda5c437f0 165 break;
mbed_official 133:d4dda5c437f0 166 // Channels 3N
mbed_official 133:d4dda5c437f0 167 case PB_1:
mbed_official 133:d4dda5c437f0 168 case PB_15:
mbed_official 133:d4dda5c437f0 169 channel = TIM_CHANNEL_3;
mbed_official 133:d4dda5c437f0 170 complementary_channel = 1;
mbed_official 133:d4dda5c437f0 171 break;
mbed_official 133:d4dda5c437f0 172 // Channels 4
mbed_official 159:3b23f6d9ecb9 173 case PA_3:
mbed_official 133:d4dda5c437f0 174 case PA_11:
mbed_official 133:d4dda5c437f0 175 case PB_9:
mbed_official 159:3b23f6d9ecb9 176 case PC_9:
mbed_official 133:d4dda5c437f0 177 channel = TIM_CHANNEL_4;
mbed_official 133:d4dda5c437f0 178 break;
mbed_official 133:d4dda5c437f0 179 default:
mbed_official 133:d4dda5c437f0 180 return;
mbed_official 133:d4dda5c437f0 181 }
mbed_official 133:d4dda5c437f0 182
mbed_official 133:d4dda5c437f0 183 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 133:d4dda5c437f0 184 if (complementary_channel) {
mbed_official 133:d4dda5c437f0 185 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 242:7074e42da0b2 186 } else {
mbed_official 133:d4dda5c437f0 187 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 133:d4dda5c437f0 188 }
mbed_official 133:d4dda5c437f0 189 }
mbed_official 133:d4dda5c437f0 190
mbed_official 133:d4dda5c437f0 191 float pwmout_read(pwmout_t* obj) {
mbed_official 133:d4dda5c437f0 192 float value = 0;
mbed_official 133:d4dda5c437f0 193 if (obj->period > 0) {
mbed_official 133:d4dda5c437f0 194 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 133:d4dda5c437f0 195 }
mbed_official 133:d4dda5c437f0 196 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 133:d4dda5c437f0 197 }
mbed_official 133:d4dda5c437f0 198
mbed_official 133:d4dda5c437f0 199 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 133:d4dda5c437f0 200 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 133:d4dda5c437f0 201 }
mbed_official 133:d4dda5c437f0 202
mbed_official 133:d4dda5c437f0 203 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 133:d4dda5c437f0 204 pwmout_period_us(obj, ms * 1000);
mbed_official 133:d4dda5c437f0 205 }
mbed_official 133:d4dda5c437f0 206
mbed_official 133:d4dda5c437f0 207 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 133:d4dda5c437f0 208 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 133:d4dda5c437f0 209
mbed_official 133:d4dda5c437f0 210 float dc = pwmout_read(obj);
mbed_official 133:d4dda5c437f0 211
mbed_official 133:d4dda5c437f0 212 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 133:d4dda5c437f0 213
mbed_official 242:7074e42da0b2 214 // Update the SystemCoreClock variable
mbed_official 242:7074e42da0b2 215 SystemCoreClockUpdate();
mbed_official 133:d4dda5c437f0 216 TimHandle.Init.Period = us - 1;
mbed_official 242:7074e42da0b2 217 TimHandle.Init.Prescaler = (uint16_t)( ( SystemCoreClock >> ClockDivider ) / 1000000) - 1; // 1 µs tick
mbed_official 133:d4dda5c437f0 218 TimHandle.Init.ClockDivision = 0;
mbed_official 133:d4dda5c437f0 219 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 133:d4dda5c437f0 220 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 133:d4dda5c437f0 221
mbed_official 133:d4dda5c437f0 222 // Set duty cycle again
mbed_official 133:d4dda5c437f0 223 pwmout_write(obj, dc);
mbed_official 133:d4dda5c437f0 224
mbed_official 133:d4dda5c437f0 225 // Save for future use
mbed_official 133:d4dda5c437f0 226 obj->period = us;
mbed_official 133:d4dda5c437f0 227
mbed_official 133:d4dda5c437f0 228 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 133:d4dda5c437f0 229 }
mbed_official 133:d4dda5c437f0 230
mbed_official 133:d4dda5c437f0 231 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 133:d4dda5c437f0 232 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 133:d4dda5c437f0 233 }
mbed_official 133:d4dda5c437f0 234
mbed_official 133:d4dda5c437f0 235 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 133:d4dda5c437f0 236 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 133:d4dda5c437f0 237 }
mbed_official 133:d4dda5c437f0 238
mbed_official 133:d4dda5c437f0 239 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 133:d4dda5c437f0 240 float value = (float)us / (float)obj->period;
mbed_official 133:d4dda5c437f0 241 pwmout_write(obj, value);
mbed_official 133:d4dda5c437f0 242 }
mbed_official 242:7074e42da0b2 243
mbed_official 242:7074e42da0b2 244 #endif