Peter Drescher / mbed-F401

mbed library with additional peripherals for ST F401 board

Fork of mbed-src by mbed official

This mbed LIB has additional peripherals for ST F401 board

  • UART2 : PA_3 rx, PA_2 tx
  • UART3 : PC_7 rx, PC_6 tx
  • I2C2 : PB_3 SDA, PB_10 SCL
  • I2C3 : PB_4 SDA, PA_8 SCL

targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/pwmout_api.c@56:99eb381a3269, 2013-12-12 (annotated)

Committer:
mbed_official
Date:
Thu Dec 12 10:45:05 2013 +0000
Revision:
56:99eb381a3269
Parent:
52:a51c77007319
Child:
58:3b55b7a41411
Synchronized with git revision bd51e4eb73a1706f1d5379ec5cebcbd6d978cb4f



Full URL: https://github.com/mbedmicro/mbed/commit/bd51e4eb73a1706f1d5379ec5cebcbd6d978cb4f/



[NUCLEO_F103RB] Add I2C master, code cleanup, ...

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 52:a51c77007319 1 /* mbed Microcontroller Library
mbed_official 52:a51c77007319 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 52:a51c77007319 3 *
mbed_official 52:a51c77007319 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 52:a51c77007319 5 * you may not use this file except in compliance with the License.
mbed_official 52:a51c77007319 6 * You may obtain a copy of the License at
mbed_official 52:a51c77007319 7 *
mbed_official 52:a51c77007319 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 52:a51c77007319 9 *
mbed_official 52:a51c77007319 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 52:a51c77007319 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 52:a51c77007319 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 52:a51c77007319 13 * See the License for the specific language governing permissions and
mbed_official 52:a51c77007319 14 * limitations under the License.
mbed_official 52:a51c77007319 15 */
mbed_official 52:a51c77007319 16 #include "pwmout_api.h"
mbed_official 52:a51c77007319 17
mbed_official 52:a51c77007319 18 #include "cmsis.h"
mbed_official 52:a51c77007319 19 #include "pinmap.h"
mbed_official 52:a51c77007319 20 #include "error.h"
mbed_official 52:a51c77007319 21
mbed_official 52:a51c77007319 22 // Only TIM2 and TIM3 can be used (TIM1 and TIM4 are used by the us_ticker)
mbed_official 52:a51c77007319 23 static const PinMap PinMap_PWM[] = {
mbed_official 52:a51c77007319 24 // TIM2
mbed_official 56:99eb381a3269 25 {PA_2, PWM_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)}, // TIM2_CH3 - ARDUINO D1 (extra)
mbed_official 56:99eb381a3269 26 {PA_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)}, // TIM2_CH4 - ARDUINO D0 (extra)
mbed_official 52:a51c77007319 27 // TIM2 remap
mbed_official 56:99eb381a3269 28 {PB_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 5)}, // TIM2r_CH2 - ARDUINO D3
mbed_official 56:99eb381a3269 29 {PB_10, PWM_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 5)}, // TIM2r_CH3 - ARDUINO D6
mbed_official 52:a51c77007319 30 // TIM3
mbed_official 56:99eb381a3269 31 {PA_6, PWM_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)}, // TIM3_CH1 - ARDUINO D12 (extra)
mbed_official 56:99eb381a3269 32 {PA_7, PWM_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)}, // TIM3_CH2 - ARDUINO D11
mbed_official 52:a51c77007319 33 // TIM3 remap
mbed_official 56:99eb381a3269 34 {PB_4, PWM_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 6)}, // TIM3r_CH1 - ARDUINO D5
mbed_official 56:99eb381a3269 35 {PC_7, PWM_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 6)}, // TIM3r_CH2 - ARDUINO D9
mbed_official 52:a51c77007319 36 {NC, NC, 0}
mbed_official 52:a51c77007319 37 };
mbed_official 52:a51c77007319 38
mbed_official 52:a51c77007319 39 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 52:a51c77007319 40 // Get the peripheral name from the pin and assign it to the object
mbed_official 52:a51c77007319 41 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 52:a51c77007319 42
mbed_official 52:a51c77007319 43 if (obj->pwm == (PWMName)NC) {
mbed_official 52:a51c77007319 44 error("PWM pinout mapping failed");
mbed_official 52:a51c77007319 45 }
mbed_official 52:a51c77007319 46
mbed_official 52:a51c77007319 47 // Enable TIM clock
mbed_official 52:a51c77007319 48 if (obj->pwm == PWM_2) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
mbed_official 52:a51c77007319 49 if (obj->pwm == PWM_3) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
mbed_official 52:a51c77007319 50
mbed_official 52:a51c77007319 51 // Configure GPIO
mbed_official 52:a51c77007319 52 pinmap_pinout(pin, PinMap_PWM);
mbed_official 52:a51c77007319 53
mbed_official 52:a51c77007319 54 obj->pin = pin;
mbed_official 52:a51c77007319 55 obj->period = 0;
mbed_official 52:a51c77007319 56 obj->pulse = 0;
mbed_official 52:a51c77007319 57
mbed_official 52:a51c77007319 58 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 52:a51c77007319 59 }
mbed_official 52:a51c77007319 60
mbed_official 52:a51c77007319 61 void pwmout_free(pwmout_t* obj) {
mbed_official 52:a51c77007319 62 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 52:a51c77007319 63 TIM_DeInit(tim);
mbed_official 52:a51c77007319 64 }
mbed_official 52:a51c77007319 65
mbed_official 52:a51c77007319 66 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 52:a51c77007319 67 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 52:a51c77007319 68 TIM_OCInitTypeDef TIM_OCInitStructure;
mbed_official 52:a51c77007319 69
mbed_official 52:a51c77007319 70 if (value < 0.0) {
mbed_official 52:a51c77007319 71 value = 0.0;
mbed_official 52:a51c77007319 72 } else if (value > 1.0) {
mbed_official 52:a51c77007319 73 value = 1.0;
mbed_official 52:a51c77007319 74 }
mbed_official 52:a51c77007319 75
mbed_official 52:a51c77007319 76 //while(TIM_GetFlagStatus(tim, TIM_FLAG_Update) == RESET);
mbed_official 52:a51c77007319 77 //TIM_ClearFlag(tim, TIM_FLAG_Update);
mbed_official 52:a51c77007319 78
mbed_official 52:a51c77007319 79 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 52:a51c77007319 80
mbed_official 52:a51c77007319 81 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
mbed_official 52:a51c77007319 82 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 52:a51c77007319 83 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
mbed_official 52:a51c77007319 84 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
mbed_official 52:a51c77007319 85
mbed_official 56:99eb381a3269 86 // TIM Channel 1
mbed_official 56:99eb381a3269 87 if ((obj->pin == PA_6) || (obj->pin == PB_4)) {
mbed_official 52:a51c77007319 88 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 52:a51c77007319 89 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 52:a51c77007319 90 }
mbed_official 52:a51c77007319 91
mbed_official 56:99eb381a3269 92 // TIM Channel 2
mbed_official 56:99eb381a3269 93 if ((obj->pin == PA_7) || (obj->pin == PB_3) || (obj->pin == PC_7)) {
mbed_official 52:a51c77007319 94 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 52:a51c77007319 95 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 52:a51c77007319 96 }
mbed_official 52:a51c77007319 97
mbed_official 56:99eb381a3269 98 // TIM Channel 3
mbed_official 56:99eb381a3269 99 if ((obj->pin == PA_2) || (obj->pin == PB_10)) {
mbed_official 52:a51c77007319 100 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 52:a51c77007319 101 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 52:a51c77007319 102 }
mbed_official 52:a51c77007319 103
mbed_official 56:99eb381a3269 104 // TIM Channel 4
mbed_official 56:99eb381a3269 105 if (obj->pin == PA_3) {
mbed_official 52:a51c77007319 106 TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 52:a51c77007319 107 TIM_OC4Init(tim, &TIM_OCInitStructure);
mbed_official 52:a51c77007319 108 }
mbed_official 52:a51c77007319 109 }
mbed_official 52:a51c77007319 110
mbed_official 52:a51c77007319 111 float pwmout_read(pwmout_t* obj) {
mbed_official 52:a51c77007319 112 float value = 0;
mbed_official 52:a51c77007319 113 if (obj->period > 0) {
mbed_official 52:a51c77007319 114 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 52:a51c77007319 115 }
mbed_official 52:a51c77007319 116 return ((value > 1.0) ? (1.0) : (value));
mbed_official 52:a51c77007319 117 }
mbed_official 52:a51c77007319 118
mbed_official 52:a51c77007319 119 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 52:a51c77007319 120 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 52:a51c77007319 121 }
mbed_official 52:a51c77007319 122
mbed_official 52:a51c77007319 123 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 52:a51c77007319 124 pwmout_period_us(obj, ms * 1000);
mbed_official 52:a51c77007319 125 }
mbed_official 52:a51c77007319 126
mbed_official 52:a51c77007319 127 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 52:a51c77007319 128 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 52:a51c77007319 129 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 52:a51c77007319 130 float dc = pwmout_read(obj);
mbed_official 52:a51c77007319 131
mbed_official 52:a51c77007319 132 TIM_Cmd(tim, DISABLE);
mbed_official 52:a51c77007319 133
mbed_official 52:a51c77007319 134 obj->period = us;
mbed_official 52:a51c77007319 135
mbed_official 52:a51c77007319 136 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
mbed_official 52:a51c77007319 137 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 52:a51c77007319 138 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 52:a51c77007319 139 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 52:a51c77007319 140 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
mbed_official 52:a51c77007319 141
mbed_official 52:a51c77007319 142 // Set duty cycle again
mbed_official 52:a51c77007319 143 pwmout_write(obj, dc);
mbed_official 52:a51c77007319 144
mbed_official 52:a51c77007319 145 TIM_ARRPreloadConfig(tim, ENABLE);
mbed_official 52:a51c77007319 146 TIM_Cmd(tim, ENABLE);
mbed_official 52:a51c77007319 147 }
mbed_official 52:a51c77007319 148
mbed_official 52:a51c77007319 149 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 52:a51c77007319 150 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 52:a51c77007319 151 }
mbed_official 52:a51c77007319 152
mbed_official 52:a51c77007319 153 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 52:a51c77007319 154 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 52:a51c77007319 155 }
mbed_official 52:a51c77007319 156
mbed_official 52:a51c77007319 157 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 52:a51c77007319 158 float value = (float)us / (float)obj->period;
mbed_official 52:a51c77007319 159 pwmout_write(obj, value);
mbed_official 52:a51c77007319 160 }