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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_WIZNET/TARGET_W7500x/pwmout_api.c@567:a97fd0eca828, 2015-06-15 (annotated)

Committer:
mbed_official
Date:
Mon Jun 15 13:30:08 2015 +0100
Revision:
567:a97fd0eca828
Child:
619:034e698bc035
Synchronized with git revision bfd1361d653d2da4a757612a5ce03f8b065d64e7



Full URL: https://github.com/mbedmicro/mbed/commit/bfd1361d653d2da4a757612a5ce03f8b065d64e7/



Wiznet - Change target name and support InterruptIn function.

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 567:a97fd0eca828 38
mbed_official 567:a97fd0eca828 39 static PWM_TimerModeInitTypeDef TimerModeStructure;
mbed_official 567:a97fd0eca828 40
mbed_official 567:a97fd0eca828 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 567:a97fd0eca828 42 {
mbed_official 567:a97fd0eca828 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 567:a97fd0eca828 44 obj->PWM_CHx = (PWM_CHn_TypeDef *)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 567:a97fd0eca828 45
mbed_official 567:a97fd0eca828 46 if (obj->PWM_CHx == (PWM_CHn_TypeDef *)NC) {
mbed_official 567:a97fd0eca828 47 error("PWM error: pinout mapping failed.");
mbed_official 567:a97fd0eca828 48 }
mbed_official 567:a97fd0eca828 49
mbed_official 567:a97fd0eca828 50 // Configure GPIO
mbed_official 567:a97fd0eca828 51 pinmap_pinout(pin, PinMap_PWM);
mbed_official 567:a97fd0eca828 52
mbed_official 567:a97fd0eca828 53 GetSystemClock();
mbed_official 567:a97fd0eca828 54
mbed_official 567:a97fd0eca828 55 obj->pin = pin;
mbed_official 567:a97fd0eca828 56
mbed_official 567:a97fd0eca828 57 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 567:a97fd0eca828 58 }
mbed_official 567:a97fd0eca828 59
mbed_official 567:a97fd0eca828 60 void pwmout_free(pwmout_t* obj)
mbed_official 567:a97fd0eca828 61 {
mbed_official 567:a97fd0eca828 62 // Configure GPIO
mbed_official 567:a97fd0eca828 63 pin_function(obj->pin, WIZ_PIN_DATA(WIZ_MODE_AF, WIZ_GPIO_NOPULL, Px_AFSR_AF0));
mbed_official 567:a97fd0eca828 64 }
mbed_official 567:a97fd0eca828 65
mbed_official 567:a97fd0eca828 66 void pwmout_write(pwmout_t* obj, float value)
mbed_official 567:a97fd0eca828 67 {
mbed_official 567:a97fd0eca828 68 if (value < (float)0.0) {
mbed_official 567:a97fd0eca828 69 value = 0.0;
mbed_official 567:a97fd0eca828 70 } else if (value > (float)1.0) {
mbed_official 567:a97fd0eca828 71 value = 1.0;
mbed_official 567:a97fd0eca828 72 }
mbed_official 567:a97fd0eca828 73
mbed_official 567:a97fd0eca828 74 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 567:a97fd0eca828 75
mbed_official 567:a97fd0eca828 76 PWM_CHn_Stop(obj->PWM_CHx);
mbed_official 567:a97fd0eca828 77
mbed_official 567:a97fd0eca828 78 TimerModeStructure.PWM_CHn_PR = obj->PrescalerValue - 1;
mbed_official 567:a97fd0eca828 79 TimerModeStructure.PWM_CHn_MR = obj->pulse;
mbed_official 567:a97fd0eca828 80 TimerModeStructure.PWM_CHn_LR = obj->period;
mbed_official 567:a97fd0eca828 81 TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
mbed_official 567:a97fd0eca828 82 TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
mbed_official 567:a97fd0eca828 83
mbed_official 567:a97fd0eca828 84 PWM_TimerModeInit(obj->PWM_CHx, &TimerModeStructure);
mbed_official 567:a97fd0eca828 85
mbed_official 567:a97fd0eca828 86 PWM_CHn_Start(obj->PWM_CHx);
mbed_official 567:a97fd0eca828 87 }
mbed_official 567:a97fd0eca828 88
mbed_official 567:a97fd0eca828 89 float pwmout_read(pwmout_t* obj)
mbed_official 567:a97fd0eca828 90 {
mbed_official 567:a97fd0eca828 91 float value = 0;
mbed_official 567:a97fd0eca828 92 if (obj->period > 0) {
mbed_official 567:a97fd0eca828 93 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 567:a97fd0eca828 94 }
mbed_official 567:a97fd0eca828 95 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 567:a97fd0eca828 96 }
mbed_official 567:a97fd0eca828 97
mbed_official 567:a97fd0eca828 98 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 567:a97fd0eca828 99 {
mbed_official 567:a97fd0eca828 100 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 567:a97fd0eca828 101 }
mbed_official 567:a97fd0eca828 102
mbed_official 567:a97fd0eca828 103 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 567:a97fd0eca828 104 {
mbed_official 567:a97fd0eca828 105 pwmout_period_us(obj, ms * 1000);
mbed_official 567:a97fd0eca828 106 }
mbed_official 567:a97fd0eca828 107
mbed_official 567:a97fd0eca828 108 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 567:a97fd0eca828 109 {
mbed_official 567:a97fd0eca828 110 PWM_CHn_Stop(obj->PWM_CHx);
mbed_official 567:a97fd0eca828 111 // Update the SystemCoreClock variable
mbed_official 567:a97fd0eca828 112 SystemCoreClockUpdate();
mbed_official 567:a97fd0eca828 113
mbed_official 567:a97fd0eca828 114 obj->period = (us * 2) - 1;
mbed_official 567:a97fd0eca828 115 obj->pulse = us / 2;
mbed_official 567:a97fd0eca828 116
mbed_official 567:a97fd0eca828 117 obj->PrescalerValue = (SystemCoreClock / 1000000) / 2;
mbed_official 567:a97fd0eca828 118 TimerModeStructure.PWM_CHn_PR = obj->PrescalerValue - 1;
mbed_official 567:a97fd0eca828 119 TimerModeStructure.PWM_CHn_MR = obj->pulse;
mbed_official 567:a97fd0eca828 120 TimerModeStructure.PWM_CHn_LR = obj->period;
mbed_official 567:a97fd0eca828 121 TimerModeStructure.PWM_CHn_UDMR = PWM_CHn_UDMR_UpCount;
mbed_official 567:a97fd0eca828 122 TimerModeStructure.PWM_CHn_PDMR = PWM_CHn_PDMR_Periodic;
mbed_official 567:a97fd0eca828 123
mbed_official 567:a97fd0eca828 124 PWM_TimerModeInit(obj->PWM_CHx, &TimerModeStructure);
mbed_official 567:a97fd0eca828 125 PWM_CtrlPWMOutputEnable(obj->PWM_CHx);
mbed_official 567:a97fd0eca828 126 }
mbed_official 567:a97fd0eca828 127
mbed_official 567:a97fd0eca828 128 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 567:a97fd0eca828 129 {
mbed_official 567:a97fd0eca828 130 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 567:a97fd0eca828 131 }
mbed_official 567:a97fd0eca828 132
mbed_official 567:a97fd0eca828 133 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 567:a97fd0eca828 134 {
mbed_official 567:a97fd0eca828 135 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 567:a97fd0eca828 136 }
mbed_official 567:a97fd0eca828 137
mbed_official 567:a97fd0eca828 138 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 567:a97fd0eca828 139 {
mbed_official 567:a97fd0eca828 140 float value = (float)(2 * us) / (float)obj->period;
mbed_official 567:a97fd0eca828 141 pwmout_write(obj, value);
mbed_official 567:a97fd0eca828 142 }
mbed_official 567:a97fd0eca828 143
mbed_official 567:a97fd0eca828 144 #endif