Bei Chen Liu / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32L0/analogout_api.c@531:47d2b67c511f, 2015-04-30 (annotated)

Committer:
mbed_official
Date:
Thu Apr 30 13:00:08 2015 +0100
Revision:
531:47d2b67c511f
Parent:
491:b97b6b70036c 
Synchronized with git revision 3b811aedb1c127ceaeeaf179a7f1c11c3a1c7956



Full URL: https://github.com/mbedmicro/mbed/commit/3b811aedb1c127ceaeeaf179a7f1c11c3a1c7956/



S130 v1.0 from Nordic. This brings in a lot of BLE4.1 functionality

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 531:47d2b67c511f 2 * Copyright (c) 2015, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 3 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 4 *
mbed_official 181:a4cbdfbbd2f4 5 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 6 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 7 *
mbed_official 181:a4cbdfbbd2f4 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 9 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 12 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 14 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 15 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 16 *
mbed_official 181:a4cbdfbbd2f4 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 27 */
mbed_official 227:7bd0639b8911 28 #include "mbed_assert.h"
mbed_official 181:a4cbdfbbd2f4 29 #include "analogout_api.h"
mbed_official 181:a4cbdfbbd2f4 30
mbed_official 181:a4cbdfbbd2f4 31 #if DEVICE_ANALOGOUT
mbed_official 181:a4cbdfbbd2f4 32
mbed_official 181:a4cbdfbbd2f4 33 #include "cmsis.h"
mbed_official 181:a4cbdfbbd2f4 34 #include "pinmap.h"
mbed_official 285:31249416b6f9 35 #include "mbed_error.h"
mbed_official 414:4ec4c5b614b0 36 #include "PeripheralPins.h"
mbed_official 181:a4cbdfbbd2f4 37
mbed_official 181:a4cbdfbbd2f4 38 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 181:a4cbdfbbd2f4 39
mbed_official 181:a4cbdfbbd2f4 40 static DAC_HandleTypeDef DacHandle;
mbed_official 181:a4cbdfbbd2f4 41
mbed_official 489:119543c9f674 42 // These variables are used for the "free" function
mbed_official 531:47d2b67c511f 43 static int channel1_used = 0;
mbed_official 531:47d2b67c511f 44 static int channel2_used = 0;
mbed_official 489:119543c9f674 45
mbed_official 402:09075a3b15e3 46 void analogout_init(dac_t *obj, PinName pin)
mbed_official 402:09075a3b15e3 47 {
mbed_official 181:a4cbdfbbd2f4 48 DAC_ChannelConfTypeDef sConfig;
mbed_official 181:a4cbdfbbd2f4 49
mbed_official 489:119543c9f674 50 // Get the peripheral name from the pin and assign it to the object
mbed_official 181:a4cbdfbbd2f4 51 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 227:7bd0639b8911 52 MBED_ASSERT(obj->dac != (DACName)NC);
mbed_official 181:a4cbdfbbd2f4 53
mbed_official 531:47d2b67c511f 54 // Get the pin function and assign the used channel to the object
mbed_official 531:47d2b67c511f 55 uint32_t function = pinmap_function(pin, PinMap_DAC);
mbed_official 531:47d2b67c511f 56 MBED_ASSERT(function != (uint32_t)NC);
mbed_official 531:47d2b67c511f 57 obj->channel = STM_PIN_CHANNEL(function);
mbed_official 531:47d2b67c511f 58
mbed_official 181:a4cbdfbbd2f4 59 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 60 pinmap_pinout(pin, PinMap_DAC);
mbed_official 181:a4cbdfbbd2f4 61
mbed_official 489:119543c9f674 62 // Save the pin for future use
mbed_official 217:d0ccc61c1fd4 63 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 64
mbed_official 181:a4cbdfbbd2f4 65 // Enable DAC clock
mbed_official 181:a4cbdfbbd2f4 66 __DAC_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 67
mbed_official 181:a4cbdfbbd2f4 68 // Configure DAC
mbed_official 489:119543c9f674 69 DacHandle.Instance = DAC;
mbed_official 489:119543c9f674 70
mbed_official 181:a4cbdfbbd2f4 71 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 181:a4cbdfbbd2f4 72 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 181:a4cbdfbbd2f4 73
mbed_official 531:47d2b67c511f 74 #if defined(DAC_CHANNEL_2)
mbed_official 531:47d2b67c511f 75 if (obj->channel == 2) {
mbed_official 531:47d2b67c511f 76 if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2) != HAL_OK) {
mbed_official 531:47d2b67c511f 77 error("Cannot configure DAC channel 2");
mbed_official 531:47d2b67c511f 78 }
mbed_official 531:47d2b67c511f 79 channel2_used = 1;
mbed_official 531:47d2b67c511f 80 } else
mbed_official 531:47d2b67c511f 81 #endif
mbed_official 531:47d2b67c511f 82 {
mbed_official 531:47d2b67c511f 83 // channel 1 per default
mbed_official 531:47d2b67c511f 84 if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1) != HAL_OK) {
mbed_official 531:47d2b67c511f 85 error("Cannot configure DAC channel 1");
mbed_official 531:47d2b67c511f 86 }
mbed_official 531:47d2b67c511f 87 obj->channel = 1;
mbed_official 531:47d2b67c511f 88 channel1_used = 1;
mbed_official 489:119543c9f674 89 }
mbed_official 489:119543c9f674 90
mbed_official 181:a4cbdfbbd2f4 91 analogout_write_u16(obj, 0);
mbed_official 181:a4cbdfbbd2f4 92 }
mbed_official 181:a4cbdfbbd2f4 93
mbed_official 402:09075a3b15e3 94 void analogout_free(dac_t *obj)
mbed_official 402:09075a3b15e3 95 {
mbed_official 201:fa203361dc70 96 // Reset DAC and disable clock
mbed_official 531:47d2b67c511f 97 if (obj->channel == 1) channel1_used = 0;
mbed_official 531:47d2b67c511f 98 if (obj->channel == 2) channel2_used = 0;
mbed_official 489:119543c9f674 99
mbed_official 531:47d2b67c511f 100 if ((channel1_used == 0) && (channel2_used == 0)) {
mbed_official 489:119543c9f674 101 __DAC_FORCE_RESET();
mbed_official 489:119543c9f674 102 __DAC_RELEASE_RESET();
mbed_official 489:119543c9f674 103 __DAC_CLK_DISABLE();
mbed_official 489:119543c9f674 104 }
mbed_official 201:fa203361dc70 105
mbed_official 181:a4cbdfbbd2f4 106 // Configure GPIO
mbed_official 217:d0ccc61c1fd4 107 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 108 }
mbed_official 181:a4cbdfbbd2f4 109
mbed_official 402:09075a3b15e3 110 static inline void dac_write(dac_t *obj, uint16_t value)
mbed_official 402:09075a3b15e3 111 {
mbed_official 531:47d2b67c511f 112 if (obj->channel == 1) {
mbed_official 489:119543c9f674 113 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 489:119543c9f674 114 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 489:119543c9f674 115 }
mbed_official 489:119543c9f674 116 #if defined(DAC_CHANNEL_2)
mbed_official 531:47d2b67c511f 117 if (obj->channel == 2) {
mbed_official 489:119543c9f674 118 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, value);
mbed_official 489:119543c9f674 119 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_2);
mbed_official 489:119543c9f674 120 }
mbed_official 489:119543c9f674 121 #endif
mbed_official 181:a4cbdfbbd2f4 122 }
mbed_official 181:a4cbdfbbd2f4 123
mbed_official 402:09075a3b15e3 124 static inline int dac_read(dac_t *obj)
mbed_official 402:09075a3b15e3 125 {
mbed_official 531:47d2b67c511f 126 if (obj->channel == 1) {
mbed_official 489:119543c9f674 127 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 489:119543c9f674 128 }
mbed_official 489:119543c9f674 129 #if defined(DAC_CHANNEL_2)
mbed_official 531:47d2b67c511f 130 if (obj->channel == 2) {
mbed_official 489:119543c9f674 131 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
mbed_official 489:119543c9f674 132 }
mbed_official 489:119543c9f674 133 #endif
mbed_official 531:47d2b67c511f 134 return 0;
mbed_official 181:a4cbdfbbd2f4 135 }
mbed_official 181:a4cbdfbbd2f4 136
mbed_official 402:09075a3b15e3 137 void analogout_write(dac_t *obj, float value)
mbed_official 402:09075a3b15e3 138 {
mbed_official 181:a4cbdfbbd2f4 139 if (value < 0.0f) {
mbed_official 181:a4cbdfbbd2f4 140 dac_write(obj, 0); // Min value
mbed_official 181:a4cbdfbbd2f4 141 } else if (value > 1.0f) {
mbed_official 181:a4cbdfbbd2f4 142 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 143 } else {
mbed_official 181:a4cbdfbbd2f4 144 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 145 }
mbed_official 181:a4cbdfbbd2f4 146 }
mbed_official 181:a4cbdfbbd2f4 147
mbed_official 402:09075a3b15e3 148 void analogout_write_u16(dac_t *obj, uint16_t value)
mbed_official 402:09075a3b15e3 149 {
mbed_official 181:a4cbdfbbd2f4 150 if (value > (uint16_t)DAC_RANGE) {
mbed_official 181:a4cbdfbbd2f4 151 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 152 } else {
mbed_official 181:a4cbdfbbd2f4 153 dac_write(obj, value);
mbed_official 181:a4cbdfbbd2f4 154 }
mbed_official 181:a4cbdfbbd2f4 155 }
mbed_official 181:a4cbdfbbd2f4 156
mbed_official 402:09075a3b15e3 157 float analogout_read(dac_t *obj)
mbed_official 402:09075a3b15e3 158 {
mbed_official 181:a4cbdfbbd2f4 159 uint32_t value = dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 160 return (float)((float)value * (1.0f / (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 161 }
mbed_official 181:a4cbdfbbd2f4 162
mbed_official 402:09075a3b15e3 163 uint16_t analogout_read_u16(dac_t *obj)
mbed_official 402:09075a3b15e3 164 {
mbed_official 181:a4cbdfbbd2f4 165 return (uint16_t)dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 166 }
mbed_official 181:a4cbdfbbd2f4 167
mbed_official 181:a4cbdfbbd2f4 168 #endif // DEVICE_ANALOGOUT