Milen Pavlov / XRange_mbed_src

Mbed SDK for XRange SX1272 LoRa module

Dependents:   XRangePingPong XRange-LoRaWAN-lmic-app lora-transceiver

SX1272 LoRa RF module

https://www.netblocks.eu/xrange-sx1272-lora-datasheet/

targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/pwmout_api.c@339:ac6f3fd999f3, 2016-01-07 (annotated)

Committer:
netblocks
Date:
Thu Jan 07 13:01:25 2016 +0000
Revision:
339:ac6f3fd999f3
Parent:
336:1e18a06a987b 
HSE_VALUE set for XTAL 16Mhz

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dudmuck 336:1e18a06a987b 1 /* mbed Microcontroller Library
dudmuck 336:1e18a06a987b 2 *******************************************************************************
dudmuck 336:1e18a06a987b 3 * Copyright (c) 2014, STMicroelectronics
dudmuck 336:1e18a06a987b 4 * All rights reserved.
dudmuck 336:1e18a06a987b 5 *
dudmuck 336:1e18a06a987b 6 * Redistribution and use in source and binary forms, with or without
dudmuck 336:1e18a06a987b 7 * modification, are permitted provided that the following conditions are met:
dudmuck 336:1e18a06a987b 8 *
dudmuck 336:1e18a06a987b 9 * 1. Redistributions of source code must retain the above copyright notice,
dudmuck 336:1e18a06a987b 10 * this list of conditions and the following disclaimer.
dudmuck 336:1e18a06a987b 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
dudmuck 336:1e18a06a987b 12 * this list of conditions and the following disclaimer in the documentation
dudmuck 336:1e18a06a987b 13 * and/or other materials provided with the distribution.
dudmuck 336:1e18a06a987b 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
dudmuck 336:1e18a06a987b 15 * may be used to endorse or promote products derived from this software
dudmuck 336:1e18a06a987b 16 * without specific prior written permission.
dudmuck 336:1e18a06a987b 17 *
dudmuck 336:1e18a06a987b 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
dudmuck 336:1e18a06a987b 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
dudmuck 336:1e18a06a987b 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
dudmuck 336:1e18a06a987b 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
dudmuck 336:1e18a06a987b 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
dudmuck 336:1e18a06a987b 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
dudmuck 336:1e18a06a987b 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
dudmuck 336:1e18a06a987b 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
dudmuck 336:1e18a06a987b 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
dudmuck 336:1e18a06a987b 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
dudmuck 336:1e18a06a987b 28 *******************************************************************************
dudmuck 336:1e18a06a987b 29 */
dudmuck 336:1e18a06a987b 30 #include "pwmout_api.h"
dudmuck 336:1e18a06a987b 31
dudmuck 336:1e18a06a987b 32 #if DEVICE_PWMOUT
dudmuck 336:1e18a06a987b 33
dudmuck 336:1e18a06a987b 34 #include "cmsis.h"
dudmuck 336:1e18a06a987b 35 #include "pinmap.h"
dudmuck 336:1e18a06a987b 36 #include "mbed_error.h"
dudmuck 336:1e18a06a987b 37 #include "PeripheralPins.h"
dudmuck 336:1e18a06a987b 38
dudmuck 336:1e18a06a987b 39 static TIM_HandleTypeDef TimHandle;
dudmuck 336:1e18a06a987b 40
dudmuck 336:1e18a06a987b 41 void pwmout_init(pwmout_t* obj, PinName pin)
dudmuck 336:1e18a06a987b 42 {
dudmuck 336:1e18a06a987b 43 // Get the peripheral name from the pin and assign it to the object
dudmuck 336:1e18a06a987b 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
dudmuck 336:1e18a06a987b 45
dudmuck 336:1e18a06a987b 46 if (obj->pwm == (PWMName)NC) {
dudmuck 336:1e18a06a987b 47 error("PWM error: pinout mapping failed.");
dudmuck 336:1e18a06a987b 48 }
dudmuck 336:1e18a06a987b 49
dudmuck 336:1e18a06a987b 50 // Enable TIM clock
dudmuck 336:1e18a06a987b 51 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
dudmuck 336:1e18a06a987b 52 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
dudmuck 336:1e18a06a987b 53 if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
dudmuck 336:1e18a06a987b 54 if (obj->pwm == PWM_5) __TIM5_CLK_ENABLE();
dudmuck 336:1e18a06a987b 55 if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
dudmuck 336:1e18a06a987b 56 if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
dudmuck 336:1e18a06a987b 57 if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
dudmuck 336:1e18a06a987b 58
dudmuck 336:1e18a06a987b 59 // Configure GPIO
dudmuck 336:1e18a06a987b 60 pinmap_pinout(pin, PinMap_PWM);
dudmuck 336:1e18a06a987b 61
dudmuck 336:1e18a06a987b 62 obj->pin = pin;
dudmuck 336:1e18a06a987b 63 obj->period = 0;
dudmuck 336:1e18a06a987b 64 obj->pulse = 0;
dudmuck 336:1e18a06a987b 65
dudmuck 336:1e18a06a987b 66 pwmout_period_us(obj, 20000); // 20 ms per default
dudmuck 336:1e18a06a987b 67 }
dudmuck 336:1e18a06a987b 68
dudmuck 336:1e18a06a987b 69 void pwmout_free(pwmout_t* obj)
dudmuck 336:1e18a06a987b 70 {
dudmuck 336:1e18a06a987b 71 // Configure GPIO
dudmuck 336:1e18a06a987b 72 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
dudmuck 336:1e18a06a987b 73 }
dudmuck 336:1e18a06a987b 74
dudmuck 336:1e18a06a987b 75 void pwmout_write(pwmout_t* obj, float value)
dudmuck 336:1e18a06a987b 76 {
dudmuck 336:1e18a06a987b 77 TIM_OC_InitTypeDef sConfig;
dudmuck 336:1e18a06a987b 78 int channel = 0;
dudmuck 336:1e18a06a987b 79
dudmuck 336:1e18a06a987b 80 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
dudmuck 336:1e18a06a987b 81
dudmuck 336:1e18a06a987b 82 if (value < (float)0.0) {
dudmuck 336:1e18a06a987b 83 value = 0.0;
dudmuck 336:1e18a06a987b 84 } else if (value > (float)1.0) {
dudmuck 336:1e18a06a987b 85 value = 1.0;
dudmuck 336:1e18a06a987b 86 }
dudmuck 336:1e18a06a987b 87
dudmuck 336:1e18a06a987b 88 obj->pulse = (uint32_t)((float)obj->period * value);
dudmuck 336:1e18a06a987b 89
dudmuck 336:1e18a06a987b 90 // Configure channels
dudmuck 336:1e18a06a987b 91 sConfig.OCMode = TIM_OCMODE_PWM1;
dudmuck 336:1e18a06a987b 92 sConfig.Pulse = obj->pulse;
dudmuck 336:1e18a06a987b 93 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
dudmuck 336:1e18a06a987b 94 sConfig.OCFastMode = TIM_OCFAST_ENABLE;
dudmuck 336:1e18a06a987b 95
dudmuck 336:1e18a06a987b 96 switch (obj->pin) {
dudmuck 336:1e18a06a987b 97 // Channels 1
dudmuck 336:1e18a06a987b 98 case PA_6:
dudmuck 336:1e18a06a987b 99 case PB_4:
dudmuck 336:1e18a06a987b 100 case PB_6:
dudmuck 336:1e18a06a987b 101 case PB_12:
dudmuck 336:1e18a06a987b 102 case PB_13:
dudmuck 336:1e18a06a987b 103 case PB_15:
dudmuck 336:1e18a06a987b 104 case PC_6:
dudmuck 336:1e18a06a987b 105 channel = TIM_CHANNEL_1;
dudmuck 336:1e18a06a987b 106 break;
dudmuck 336:1e18a06a987b 107 // Channels 2
dudmuck 336:1e18a06a987b 108 case PA_1:
dudmuck 336:1e18a06a987b 109 case PA_7:
dudmuck 336:1e18a06a987b 110 case PB_3:
dudmuck 336:1e18a06a987b 111 case PB_5:
dudmuck 336:1e18a06a987b 112 case PB_7:
dudmuck 336:1e18a06a987b 113 case PB_14:
dudmuck 336:1e18a06a987b 114 case PC_7:
dudmuck 336:1e18a06a987b 115 channel = TIM_CHANNEL_2;
dudmuck 336:1e18a06a987b 116 break;
dudmuck 336:1e18a06a987b 117 // Channels 3
dudmuck 336:1e18a06a987b 118 case PA_2:
dudmuck 336:1e18a06a987b 119 case PB_0:
dudmuck 336:1e18a06a987b 120 case PB_8:
dudmuck 336:1e18a06a987b 121 case PB_10:
dudmuck 336:1e18a06a987b 122 case PC_8:
dudmuck 336:1e18a06a987b 123 channel = TIM_CHANNEL_3;
dudmuck 336:1e18a06a987b 124 break;
dudmuck 336:1e18a06a987b 125 // Channels 4
dudmuck 336:1e18a06a987b 126 case PA_3:
dudmuck 336:1e18a06a987b 127 case PB_1:
dudmuck 336:1e18a06a987b 128 case PB_9:
dudmuck 336:1e18a06a987b 129 case PB_11:
dudmuck 336:1e18a06a987b 130 case PC_9:
dudmuck 336:1e18a06a987b 131 channel = TIM_CHANNEL_4;
dudmuck 336:1e18a06a987b 132 break;
dudmuck 336:1e18a06a987b 133 default:
dudmuck 336:1e18a06a987b 134 return;
dudmuck 336:1e18a06a987b 135 }
dudmuck 336:1e18a06a987b 136
dudmuck 336:1e18a06a987b 137 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
dudmuck 336:1e18a06a987b 138 HAL_TIM_PWM_Start(&TimHandle, channel);
dudmuck 336:1e18a06a987b 139 }
dudmuck 336:1e18a06a987b 140
dudmuck 336:1e18a06a987b 141 float pwmout_read(pwmout_t* obj)
dudmuck 336:1e18a06a987b 142 {
dudmuck 336:1e18a06a987b 143 float value = 0;
dudmuck 336:1e18a06a987b 144 if (obj->period > 0) {
dudmuck 336:1e18a06a987b 145 value = (float)(obj->pulse) / (float)(obj->period);
dudmuck 336:1e18a06a987b 146 }
dudmuck 336:1e18a06a987b 147 return ((value > (float)1.0) ? (float)(1.0) : (value));
dudmuck 336:1e18a06a987b 148 }
dudmuck 336:1e18a06a987b 149
dudmuck 336:1e18a06a987b 150 void pwmout_period(pwmout_t* obj, float seconds)
dudmuck 336:1e18a06a987b 151 {
dudmuck 336:1e18a06a987b 152 pwmout_period_us(obj, seconds * 1000000.0f);
dudmuck 336:1e18a06a987b 153 }
dudmuck 336:1e18a06a987b 154
dudmuck 336:1e18a06a987b 155 void pwmout_period_ms(pwmout_t* obj, int ms)
dudmuck 336:1e18a06a987b 156 {
dudmuck 336:1e18a06a987b 157 pwmout_period_us(obj, ms * 1000);
dudmuck 336:1e18a06a987b 158 }
dudmuck 336:1e18a06a987b 159
dudmuck 336:1e18a06a987b 160 void pwmout_period_us(pwmout_t* obj, int us)
dudmuck 336:1e18a06a987b 161 {
dudmuck 336:1e18a06a987b 162 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
dudmuck 336:1e18a06a987b 163
dudmuck 336:1e18a06a987b 164 float dc = pwmout_read(obj);
dudmuck 336:1e18a06a987b 165
dudmuck 336:1e18a06a987b 166 __HAL_TIM_DISABLE(&TimHandle);
dudmuck 336:1e18a06a987b 167
dudmuck 336:1e18a06a987b 168 SystemCoreClockUpdate();
dudmuck 336:1e18a06a987b 169
dudmuck 336:1e18a06a987b 170 TimHandle.Init.Period = us - 1;
dudmuck 336:1e18a06a987b 171 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
dudmuck 336:1e18a06a987b 172 TimHandle.Init.ClockDivision = 0;
dudmuck 336:1e18a06a987b 173 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
dudmuck 336:1e18a06a987b 174 HAL_TIM_PWM_Init(&TimHandle);
dudmuck 336:1e18a06a987b 175
dudmuck 336:1e18a06a987b 176 // Set duty cycle again
dudmuck 336:1e18a06a987b 177 pwmout_write(obj, dc);
dudmuck 336:1e18a06a987b 178
dudmuck 336:1e18a06a987b 179 // Save for future use
dudmuck 336:1e18a06a987b 180 obj->period = us;
dudmuck 336:1e18a06a987b 181
dudmuck 336:1e18a06a987b 182 __HAL_TIM_ENABLE(&TimHandle);
dudmuck 336:1e18a06a987b 183 }
dudmuck 336:1e18a06a987b 184
dudmuck 336:1e18a06a987b 185 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
dudmuck 336:1e18a06a987b 186 {
dudmuck 336:1e18a06a987b 187 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
dudmuck 336:1e18a06a987b 188 }
dudmuck 336:1e18a06a987b 189
dudmuck 336:1e18a06a987b 190 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
dudmuck 336:1e18a06a987b 191 {
dudmuck 336:1e18a06a987b 192 pwmout_pulsewidth_us(obj, ms * 1000);
dudmuck 336:1e18a06a987b 193 }
dudmuck 336:1e18a06a987b 194
dudmuck 336:1e18a06a987b 195 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
dudmuck 336:1e18a06a987b 196 {
dudmuck 336:1e18a06a987b 197 float value = (float)us / (float)obj->period;
dudmuck 336:1e18a06a987b 198 pwmout_write(obj, value);
dudmuck 336:1e18a06a987b 199 }
dudmuck 336:1e18a06a987b 200
dudmuck 336:1e18a06a987b 201 #endif