Paul Paterson / mbed-src-CanNucleoF0

mbed library sources, include can_api for nucleo-f091rc

Dependents:   CanNucleoF0_example

Fork of mbed-src by mbed official

targets/hal/TARGET_WIZNET/TARGET_W7500x/pwmout_api.c@645:13c87cbecd54, 2016-01-07 (annotated)

Committer:
ptpaterson
Date:
Thu Jan 07 05:49:05 2016 +0000
Revision:
645:13c87cbecd54
Parent:
619:034e698bc035 
corrected freeze on CAN_RECEIVE_IT

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 567:a97fd0eca828 1 /* mbed Microcontroller Library
mbed_official 567:a97fd0eca828 2 *******************************************************************************
mbed_official 567:a97fd0eca828 3 * Copyright (c) 2015 WIZnet Co.,Ltd. All rights reserved.
mbed_official 567:a97fd0eca828 4 * All rights reserved.
mbed_official 567:a97fd0eca828 5 *
mbed_official 567:a97fd0eca828 6 * Redistribution and use in source and binary forms, with or without
mbed_official 567:a97fd0eca828 7 * modification, are permitted provided that the following conditions are met:
mbed_official 567:a97fd0eca828 8 *
mbed_official 567:a97fd0eca828 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 567:a97fd0eca828 10 * this list of conditions and the following disclaimer.
mbed_official 567:a97fd0eca828 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 567:a97fd0eca828 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 567:a97fd0eca828 13 * and/or other materials provided with the distribution.
mbed_official 567:a97fd0eca828 14 * 3. Neither the name of ARM Limited nor the names of its contributors
mbed_official 567:a97fd0eca828 15 * may be used to endorse or promote products derived from this software
mbed_official 567:a97fd0eca828 16 * without specific prior written permission.
mbed_official 567:a97fd0eca828 17 *
mbed_official 567:a97fd0eca828 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 567:a97fd0eca828 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 567:a97fd0eca828 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 567:a97fd0eca828 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 567:a97fd0eca828 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 567:a97fd0eca828 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 567:a97fd0eca828 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 567:a97fd0eca828 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 567:a97fd0eca828 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 567:a97fd0eca828 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 567:a97fd0eca828 28 *******************************************************************************
mbed_official 567:a97fd0eca828 29 */
mbed_official 567:a97fd0eca828 30 #include "pwmout_api.h"
mbed_official 567:a97fd0eca828 31
mbed_official 567:a97fd0eca828 32 #if DEVICE_PWMOUT
mbed_official 567:a97fd0eca828 33
mbed_official 567:a97fd0eca828 34 #include "cmsis.h"
mbed_official 567:a97fd0eca828 35 #include "pinmap.h"
mbed_official 567:a97fd0eca828 36 #include "mbed_error.h"
mbed_official 567:a97fd0eca828 37 #include "PeripheralPins.h"
mbed_official 619:034e698bc035 38 #include "W7500x_pwm.h"
mbed_official 567:a97fd0eca828 39
mbed_official 567:a97fd0eca828 40 static PWM_TimerModeInitTypeDef TimerModeStructure;
mbed_official 567:a97fd0eca828 41
mbed_official 567:a97fd0eca828 42 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 567:a97fd0eca828 43 {
mbed_official 567:a97fd0eca828 44 // Get the peripheral name from the pin and assign it to the object
mbed_official 567:a97fd0eca828 45 obj->PWM_CHx = (PWM_CHn_TypeDef *)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 567:a97fd0eca828 46
mbed_official 567:a97fd0eca828 47 if (obj->PWM_CHx == (PWM_CHn_TypeDef *)NC) {
mbed_official 567:a97fd0eca828 48 error("PWM error: pinout mapping failed.");
mbed_official 567:a97fd0eca828 49 }
mbed_official 567:a97fd0eca828 50
mbed_official 567:a97fd0eca828 51 // Configure GPIO
mbed_official 567:a97fd0eca828 52 pinmap_pinout(pin, PinMap_PWM);
mbed_official 567:a97fd0eca828 53
mbed_official 567:a97fd0eca828 54 GetSystemClock();
mbed_official 567:a97fd0eca828 55
mbed_official 567:a97fd0eca828 56 obj->pin = pin;
mbed_official 567:a97fd0eca828 57
mbed_official 567:a97fd0eca828 58 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 567:a97fd0eca828 59 }
mbed_official 567:a97fd0eca828 60
mbed_official 567:a97fd0eca828 61 void pwmout_free(pwmout_t* obj)
mbed_official 567:a97fd0eca828 62 {
mbed_official 567:a97fd0eca828 63 // Configure GPIO
mbed_official 567:a97fd0eca828 64 pin_function(obj->pin, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF0));
mbed_official 567:a97fd0eca828 65 }
mbed_official 567:a97fd0eca828 66
mbed_official 567:a97fd0eca828 67 void pwmout_write(pwmout_t* obj, float value)
mbed_official 567:a97fd0eca828 68 {
mbed_official 567:a97fd0eca828 69 if (value < (float)0.0) {
mbed_official 567:a97fd0eca828 70 value = 0.0;
mbed_official 567:a97fd0eca828 71 } else if (value > (float)1.0) {
mbed_official 567:a97fd0eca828 72 value = 1.0;
mbed_official 567:a97fd0eca828 73 }
mbed_official 567:a97fd0eca828 74
mbed_official 567:a97fd0eca828 75 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 567:a97fd0eca828 76
mbed_official 567:a97fd0eca828 77 PWM_CHn_Stop(obj->PWM_CHx);
mbed_official 567:a97fd0eca828 78
mbed_official 567:a97fd0eca828 79 TimerModeStructure.PWM_CHn_PR = obj->PrescalerValue - 1;
mbed_official 567:a97fd0eca828 80 TimerModeStructure.PWM_CHn_MR = obj->pulse;
mbed_official 567:a97fd0eca828 81 TimerModeStructure.PWM_CHn_LR = obj->period;
mbed_official 567:a97fd0eca828 82 TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
mbed_official 567:a97fd0eca828 83 TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
mbed_official 567:a97fd0eca828 84
mbed_official 567:a97fd0eca828 85 PWM_TimerModeInit(obj->PWM_CHx, &TimerModeStructure);
mbed_official 567:a97fd0eca828 86
mbed_official 567:a97fd0eca828 87 PWM_CHn_Start(obj->PWM_CHx);
mbed_official 567:a97fd0eca828 88 }
mbed_official 567:a97fd0eca828 89
mbed_official 567:a97fd0eca828 90 float pwmout_read(pwmout_t* obj)
mbed_official 567:a97fd0eca828 91 {
mbed_official 567:a97fd0eca828 92 float value = 0;
mbed_official 567:a97fd0eca828 93 if (obj->period > 0) {
mbed_official 567:a97fd0eca828 94 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 567:a97fd0eca828 95 }
mbed_official 567:a97fd0eca828 96 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 567:a97fd0eca828 97 }
mbed_official 567:a97fd0eca828 98
mbed_official 567:a97fd0eca828 99 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 567:a97fd0eca828 100 {
mbed_official 567:a97fd0eca828 101 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 567:a97fd0eca828 102 }
mbed_official 567:a97fd0eca828 103
mbed_official 567:a97fd0eca828 104 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 567:a97fd0eca828 105 {
mbed_official 567:a97fd0eca828 106 pwmout_period_us(obj, ms * 1000);
mbed_official 567:a97fd0eca828 107 }
mbed_official 567:a97fd0eca828 108
mbed_official 567:a97fd0eca828 109 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 567:a97fd0eca828 110 {
mbed_official 567:a97fd0eca828 111 PWM_CHn_Stop(obj->PWM_CHx);
mbed_official 567:a97fd0eca828 112 // Update the SystemCoreClock variable
mbed_official 567:a97fd0eca828 113 SystemCoreClockUpdate();
mbed_official 567:a97fd0eca828 114
mbed_official 567:a97fd0eca828 115 obj->period = (us * 2) - 1;
mbed_official 567:a97fd0eca828 116 obj->pulse = us / 2;
mbed_official 567:a97fd0eca828 117
mbed_official 567:a97fd0eca828 118 obj->PrescalerValue = (SystemCoreClock / 1000000) / 2;
mbed_official 567:a97fd0eca828 119 TimerModeStructure.PWM_CHn_PR = obj->PrescalerValue - 1;
mbed_official 567:a97fd0eca828 120 TimerModeStructure.PWM_CHn_MR = obj->pulse;
mbed_official 567:a97fd0eca828 121 TimerModeStructure.PWM_CHn_LR = obj->period;
mbed_official 567:a97fd0eca828 122 TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
mbed_official 567:a97fd0eca828 123 TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
mbed_official 567:a97fd0eca828 124
mbed_official 567:a97fd0eca828 125 PWM_TimerModeInit(obj->PWM_CHx, &TimerModeStructure);
mbed_official 567:a97fd0eca828 126 PWM_CtrlPWMOutputEnable(obj->PWM_CHx);
mbed_official 567:a97fd0eca828 127 }
mbed_official 567:a97fd0eca828 128
mbed_official 567:a97fd0eca828 129 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 567:a97fd0eca828 130 {
mbed_official 567:a97fd0eca828 131 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 567:a97fd0eca828 132 }
mbed_official 567:a97fd0eca828 133
mbed_official 567:a97fd0eca828 134 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 567:a97fd0eca828 135 {
mbed_official 567:a97fd0eca828 136 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 567:a97fd0eca828 137 }
mbed_official 567:a97fd0eca828 138
mbed_official 567:a97fd0eca828 139 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 567:a97fd0eca828 140 {
mbed_official 567:a97fd0eca828 141 float value = (float)(2 * us) / (float)obj->period;
mbed_official 567:a97fd0eca828 142 pwmout_write(obj, value);
mbed_official 567:a97fd0eca828 143 }
mbed_official 567:a97fd0eca828 144
mbed_official 567:a97fd0eca828 145 #endif