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@58:3b55b7a41411, 2013-12-13 (annotated)

Committer:
mbed_official
Date:
Fri Dec 13 09:30:05 2013 +0000
Revision:
58:3b55b7a41411
Parent:
56:99eb381a3269
Child:
70:c1fbde68b492
Synchronized with git revision da605b82a5ca02e18b987f366969d615bec94035



Full URL: https://github.com/mbedmicro/mbed/commit/da605b82a5ca02e18b987f366969d615bec94035/



[NUCLEO_F103RB] Update PWM IOs used + I2C 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 58:3b55b7a41411 24 // TIM2 default
mbed_official 58:3b55b7a41411 25 //{PA_2, PWM_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)}, // TIM2_CH3 - ARDUINO D1
mbed_official 58:3b55b7a41411 26 //{PA_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)}, // TIM2_CH4 - ARDUINO D0
mbed_official 58:3b55b7a41411 27 // TIM2 full remap
mbed_official 58:3b55b7a41411 28 {PB_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 5)}, // TIM2fr_CH2 - ARDUINO D3
mbed_official 58:3b55b7a41411 29 //{PB_10, PWM_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 5)}, // TIM2fr_CH3 - ARDUINO D6
mbed_official 58:3b55b7a41411 30 // TIM3 default
mbed_official 58:3b55b7a41411 31 //{PA_6, PWM_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)}, // TIM3_CH1 - ARDUINO D12
mbed_official 58:3b55b7a41411 32 //{PA_7, PWM_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)}, // TIM3_CH2 - ARDUINO D11
mbed_official 58:3b55b7a41411 33 // TIM3 full remap
mbed_official 58:3b55b7a41411 34 //{PC_7, PWM_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 6)}, // TIM3fr_CH2 - ARDUINO D9
mbed_official 58:3b55b7a41411 35 // TIM3 partial remap
mbed_official 58:3b55b7a41411 36 {PB_4, PWM_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 7)}, // TIM3pr_CH1 - ARDUINO D5
mbed_official 52:a51c77007319 37 {NC, NC, 0}
mbed_official 52:a51c77007319 38 };
mbed_official 52:a51c77007319 39
mbed_official 52:a51c77007319 40 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 52:a51c77007319 41 // Get the peripheral name from the pin and assign it to the object
mbed_official 52:a51c77007319 42 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 52:a51c77007319 43
mbed_official 52:a51c77007319 44 if (obj->pwm == (PWMName)NC) {
mbed_official 52:a51c77007319 45 error("PWM pinout mapping failed");
mbed_official 52:a51c77007319 46 }
mbed_official 52:a51c77007319 47
mbed_official 52:a51c77007319 48 // Enable TIM clock
mbed_official 52:a51c77007319 49 if (obj->pwm == PWM_2) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
mbed_official 52:a51c77007319 50 if (obj->pwm == PWM_3) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
mbed_official 52:a51c77007319 51
mbed_official 52:a51c77007319 52 // Configure GPIO
mbed_official 52:a51c77007319 53 pinmap_pinout(pin, PinMap_PWM);
mbed_official 52:a51c77007319 54
mbed_official 52:a51c77007319 55 obj->pin = pin;
mbed_official 52:a51c77007319 56 obj->period = 0;
mbed_official 52:a51c77007319 57 obj->pulse = 0;
mbed_official 52:a51c77007319 58
mbed_official 52:a51c77007319 59 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 52:a51c77007319 60 }
mbed_official 52:a51c77007319 61
mbed_official 52:a51c77007319 62 void pwmout_free(pwmout_t* obj) {
mbed_official 52:a51c77007319 63 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 52:a51c77007319 64 TIM_DeInit(tim);
mbed_official 52:a51c77007319 65 }
mbed_official 52:a51c77007319 66
mbed_official 52:a51c77007319 67 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 52:a51c77007319 68 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 52:a51c77007319 69 TIM_OCInitTypeDef TIM_OCInitStructure;
mbed_official 52:a51c77007319 70
mbed_official 52:a51c77007319 71 if (value < 0.0) {
mbed_official 52:a51c77007319 72 value = 0.0;
mbed_official 52:a51c77007319 73 } else if (value > 1.0) {
mbed_official 52:a51c77007319 74 value = 1.0;
mbed_official 52:a51c77007319 75 }
mbed_official 52:a51c77007319 76
mbed_official 52:a51c77007319 77 //while(TIM_GetFlagStatus(tim, TIM_FLAG_Update) == RESET);
mbed_official 52:a51c77007319 78 //TIM_ClearFlag(tim, TIM_FLAG_Update);
mbed_official 52:a51c77007319 79
mbed_official 52:a51c77007319 80 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 52:a51c77007319 81
mbed_official 52:a51c77007319 82 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
mbed_official 52:a51c77007319 83 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 52:a51c77007319 84 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
mbed_official 52:a51c77007319 85 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
mbed_official 52:a51c77007319 86
mbed_official 58:3b55b7a41411 87 // Configure channel 1
mbed_official 58:3b55b7a41411 88 if (obj->pin == PB_4) {
mbed_official 52:a51c77007319 89 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 52:a51c77007319 90 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 52:a51c77007319 91 }
mbed_official 52:a51c77007319 92
mbed_official 58:3b55b7a41411 93 // Configure channel 2
mbed_official 58:3b55b7a41411 94 if (obj->pin == PB_3) {
mbed_official 52:a51c77007319 95 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 52:a51c77007319 96 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 52:a51c77007319 97 }
mbed_official 52:a51c77007319 98
mbed_official 58:3b55b7a41411 99 // Configure channel 3
mbed_official 58:3b55b7a41411 100 //if (obj->pin == PB_10) {
mbed_official 58:3b55b7a41411 101 // TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 58:3b55b7a41411 102 // TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 58:3b55b7a41411 103 //}
mbed_official 52:a51c77007319 104
mbed_official 58:3b55b7a41411 105 // Configure channel 4
mbed_official 58:3b55b7a41411 106 //if (obj->pin == PA_3) {
mbed_official 58:3b55b7a41411 107 // TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 58:3b55b7a41411 108 // TIM_OC4Init(tim, &TIM_OCInitStructure);
mbed_official 58:3b55b7a41411 109 //}
mbed_official 52:a51c77007319 110 }
mbed_official 52:a51c77007319 111
mbed_official 52:a51c77007319 112 float pwmout_read(pwmout_t* obj) {
mbed_official 52:a51c77007319 113 float value = 0;
mbed_official 52:a51c77007319 114 if (obj->period > 0) {
mbed_official 52:a51c77007319 115 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 52:a51c77007319 116 }
mbed_official 52:a51c77007319 117 return ((value > 1.0) ? (1.0) : (value));
mbed_official 52:a51c77007319 118 }
mbed_official 52:a51c77007319 119
mbed_official 52:a51c77007319 120 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 52:a51c77007319 121 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 52:a51c77007319 122 }
mbed_official 52:a51c77007319 123
mbed_official 52:a51c77007319 124 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 52:a51c77007319 125 pwmout_period_us(obj, ms * 1000);
mbed_official 52:a51c77007319 126 }
mbed_official 52:a51c77007319 127
mbed_official 52:a51c77007319 128 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 52:a51c77007319 129 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 52:a51c77007319 130 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 52:a51c77007319 131 float dc = pwmout_read(obj);
mbed_official 52:a51c77007319 132
mbed_official 52:a51c77007319 133 TIM_Cmd(tim, DISABLE);
mbed_official 52:a51c77007319 134
mbed_official 52:a51c77007319 135 obj->period = us;
mbed_official 52:a51c77007319 136
mbed_official 52:a51c77007319 137 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
mbed_official 52:a51c77007319 138 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 52:a51c77007319 139 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 52:a51c77007319 140 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 52:a51c77007319 141 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
mbed_official 52:a51c77007319 142
mbed_official 52:a51c77007319 143 // Set duty cycle again
mbed_official 52:a51c77007319 144 pwmout_write(obj, dc);
mbed_official 52:a51c77007319 145
mbed_official 52:a51c77007319 146 TIM_ARRPreloadConfig(tim, ENABLE);
mbed_official 52:a51c77007319 147 TIM_Cmd(tim, ENABLE);
mbed_official 52:a51c77007319 148 }
mbed_official 52:a51c77007319 149
mbed_official 52:a51c77007319 150 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 52:a51c77007319 151 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 52:a51c77007319 152 }
mbed_official 52:a51c77007319 153
mbed_official 52:a51c77007319 154 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 52:a51c77007319 155 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 52:a51c77007319 156 }
mbed_official 52:a51c77007319 157
mbed_official 52:a51c77007319 158 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 52:a51c77007319 159 float value = (float)us / (float)obj->period;
mbed_official 52:a51c77007319 160 pwmout_write(obj, value);
mbed_official 52:a51c77007319 161 }