philippe s. / mbed-dev

mbed library sources. Supersedes mbed-src. Fixes analogIn and analogOut problems for TARGET_STM32F3. Tested on NUCLEO-F303K8, using 3 analogout and 7 analogin channels simultaneously. Added ability for STM32F334R8 and STM32F303K8 to use all three channels of DAC simultaneously. https://developer.mbed.org/users/StevieWray/code/mbed-dev/ Added ability for TARGET_STM32F3 to use more than one ADC simultaneously. https://developer.mbed.org/questions/67997/NUCLEO-F303K8ADC/

Fork of mbed-dev by mbed official

targets/hal/TARGET_STM/TARGET_STM32F3/analogout_api.c@8:69ce7aaad4c4, 2015-10-26 (annotated)

Committer:
mbed_official
Date:
Mon Oct 26 09:00:10 2015 +0000
Revision:
8:69ce7aaad4c4
Parent:
0:9b334a45a8ff
Child:
70:b3a5af880266
Synchronized with git revision 22ef4124357e8536842581c7afd8e0c2c7858d6f



Full URL: https://github.com/mbedmicro/mbed/commit/22ef4124357e8536842581c7afd8e0c2c7858d6f/



STM32xx -Fix analog_out issue with 12 to 16bits conversion

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2015, STMicroelectronics
bogdanm 0:9b334a45a8ff 3 * All rights reserved.
bogdanm 0:9b334a45a8ff 4 *
bogdanm 0:9b334a45a8ff 5 * Redistribution and use in source and binary forms, with or without
bogdanm 0:9b334a45a8ff 6 * modification, are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 7 *
bogdanm 0:9b334a45a8ff 8 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 9 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 11 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 12 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 14 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 15 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 16 *
bogdanm 0:9b334a45a8ff 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 27 */
bogdanm 0:9b334a45a8ff 28 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 29 #include "analogout_api.h"
bogdanm 0:9b334a45a8ff 30
bogdanm 0:9b334a45a8ff 31 #if DEVICE_ANALOGOUT
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 #include "cmsis.h"
bogdanm 0:9b334a45a8ff 34 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 35 #include "mbed_error.h"
bogdanm 0:9b334a45a8ff 36 #include "PeripheralPins.h"
bogdanm 0:9b334a45a8ff 37
bogdanm 0:9b334a45a8ff 38 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 8:69ce7aaad4c4 39 #define DAC_NB_BITS (12)
bogdanm 0:9b334a45a8ff 40
bogdanm 0:9b334a45a8ff 41 static DAC_HandleTypeDef DacHandle;
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 // These variables are used for the "free" function
bogdanm 0:9b334a45a8ff 44 static int pa4_used = 0;
bogdanm 0:9b334a45a8ff 45 static int pa5_used = 0;
bogdanm 0:9b334a45a8ff 46
mbed_official 8:69ce7aaad4c4 47 void analogout_init(dac_t *obj, PinName pin) {
bogdanm 0:9b334a45a8ff 48 DAC_ChannelConfTypeDef sConfig;
bogdanm 0:9b334a45a8ff 49
bogdanm 0:9b334a45a8ff 50 // Get the peripheral name from the pin and assign it to the object
bogdanm 0:9b334a45a8ff 51 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
bogdanm 0:9b334a45a8ff 52 MBED_ASSERT(obj->dac != (DACName)NC);
bogdanm 0:9b334a45a8ff 53
bogdanm 0:9b334a45a8ff 54 // Get the pin function and assign the used channel to the object
bogdanm 0:9b334a45a8ff 55 uint32_t function = pinmap_function(pin, PinMap_DAC);
bogdanm 0:9b334a45a8ff 56 MBED_ASSERT(function != (uint32_t)NC);
bogdanm 0:9b334a45a8ff 57 obj->channel = STM_PIN_CHANNEL(function);
bogdanm 0:9b334a45a8ff 58
bogdanm 0:9b334a45a8ff 59 // Configure GPIO
bogdanm 0:9b334a45a8ff 60 pinmap_pinout(pin, PinMap_DAC);
bogdanm 0:9b334a45a8ff 61
bogdanm 0:9b334a45a8ff 62 // Save the pin for future use
bogdanm 0:9b334a45a8ff 63 obj->pin = pin;
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 // Enable DAC clock
bogdanm 0:9b334a45a8ff 66 if (obj->dac == DAC_1) {
bogdanm 0:9b334a45a8ff 67 __DAC1_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 68 }
bogdanm 0:9b334a45a8ff 69 #if defined(DAC2)
bogdanm 0:9b334a45a8ff 70 if (obj->dac == DAC_2) {
bogdanm 0:9b334a45a8ff 71 __DAC2_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 72 }
bogdanm 0:9b334a45a8ff 73 #endif
bogdanm 0:9b334a45a8ff 74
bogdanm 0:9b334a45a8ff 75 // Configure DAC
bogdanm 0:9b334a45a8ff 76 DacHandle.Instance = (DAC_TypeDef *)(obj->dac);
bogdanm 0:9b334a45a8ff 77
bogdanm 0:9b334a45a8ff 78 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
bogdanm 0:9b334a45a8ff 79 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
bogdanm 0:9b334a45a8ff 80
bogdanm 0:9b334a45a8ff 81 if (pin == PA_4) {
bogdanm 0:9b334a45a8ff 82 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
bogdanm 0:9b334a45a8ff 83 pa4_used = 1;
bogdanm 0:9b334a45a8ff 84 }
bogdanm 0:9b334a45a8ff 85
bogdanm 0:9b334a45a8ff 86 #if defined(DAC_CHANNEL_2)
bogdanm 0:9b334a45a8ff 87 if (pin == PA_5) {
bogdanm 0:9b334a45a8ff 88 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2);
bogdanm 0:9b334a45a8ff 89 pa5_used = 1;
bogdanm 0:9b334a45a8ff 90 }
bogdanm 0:9b334a45a8ff 91 #endif
bogdanm 0:9b334a45a8ff 92
bogdanm 0:9b334a45a8ff 93 if (pin == PA_6) {
bogdanm 0:9b334a45a8ff 94 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
bogdanm 0:9b334a45a8ff 95 }
bogdanm 0:9b334a45a8ff 96
bogdanm 0:9b334a45a8ff 97 analogout_write_u16(obj, 0);
bogdanm 0:9b334a45a8ff 98 }
bogdanm 0:9b334a45a8ff 99
mbed_official 8:69ce7aaad4c4 100 void analogout_free(dac_t *obj) {
bogdanm 0:9b334a45a8ff 101 // Reset DAC and disable clock
bogdanm 0:9b334a45a8ff 102 if (obj->pin == PA_4) pa4_used = 0;
bogdanm 0:9b334a45a8ff 103 if (obj->pin == PA_5) pa5_used = 0;
bogdanm 0:9b334a45a8ff 104
bogdanm 0:9b334a45a8ff 105 if ((pa4_used == 0) && (pa5_used == 0)) {
bogdanm 0:9b334a45a8ff 106 __DAC1_FORCE_RESET();
bogdanm 0:9b334a45a8ff 107 __DAC1_RELEASE_RESET();
bogdanm 0:9b334a45a8ff 108 __DAC1_CLK_DISABLE();
bogdanm 0:9b334a45a8ff 109 }
bogdanm 0:9b334a45a8ff 110
bogdanm 0:9b334a45a8ff 111 #if defined(DAC2)
bogdanm 0:9b334a45a8ff 112 if (obj->pin == PA_6) {
bogdanm 0:9b334a45a8ff 113 __DAC2_FORCE_RESET();
bogdanm 0:9b334a45a8ff 114 __DAC2_RELEASE_RESET();
bogdanm 0:9b334a45a8ff 115 __DAC2_CLK_DISABLE();
bogdanm 0:9b334a45a8ff 116 }
bogdanm 0:9b334a45a8ff 117 #endif
bogdanm 0:9b334a45a8ff 118
bogdanm 0:9b334a45a8ff 119 // Configure GPIO
bogdanm 0:9b334a45a8ff 120 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
bogdanm 0:9b334a45a8ff 121 }
bogdanm 0:9b334a45a8ff 122
mbed_official 8:69ce7aaad4c4 123 static inline void dac_write(dac_t *obj, int value) {
bogdanm 0:9b334a45a8ff 124 if (obj->channel == 1) {
mbed_official 8:69ce7aaad4c4 125 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, (value & DAC_RANGE));
bogdanm 0:9b334a45a8ff 126 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
bogdanm 0:9b334a45a8ff 127 }
bogdanm 0:9b334a45a8ff 128 #if defined(DAC_CHANNEL_2)
bogdanm 0:9b334a45a8ff 129 if (obj->channel == 2) {
mbed_official 8:69ce7aaad4c4 130 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, (value & DAC_RANGE));
bogdanm 0:9b334a45a8ff 131 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_2);
bogdanm 0:9b334a45a8ff 132 }
bogdanm 0:9b334a45a8ff 133 #endif
bogdanm 0:9b334a45a8ff 134 }
bogdanm 0:9b334a45a8ff 135
mbed_official 8:69ce7aaad4c4 136 static inline int dac_read(dac_t *obj) {
bogdanm 0:9b334a45a8ff 137 if (obj->channel == 1) {
bogdanm 0:9b334a45a8ff 138 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
bogdanm 0:9b334a45a8ff 139 }
bogdanm 0:9b334a45a8ff 140 #if defined(DAC_CHANNEL_2)
bogdanm 0:9b334a45a8ff 141 if (obj->channel == 2) {
bogdanm 0:9b334a45a8ff 142 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
bogdanm 0:9b334a45a8ff 143 }
bogdanm 0:9b334a45a8ff 144 #endif
bogdanm 0:9b334a45a8ff 145 return 0;
bogdanm 0:9b334a45a8ff 146 }
bogdanm 0:9b334a45a8ff 147
mbed_official 8:69ce7aaad4c4 148 void analogout_write(dac_t *obj, float value) {
bogdanm 0:9b334a45a8ff 149 if (value < 0.0f) {
bogdanm 0:9b334a45a8ff 150 dac_write(obj, 0); // Min value
bogdanm 0:9b334a45a8ff 151 } else if (value > 1.0f) {
mbed_official 8:69ce7aaad4c4 152 dac_write(obj, (int)DAC_RANGE); // Max value
bogdanm 0:9b334a45a8ff 153 } else {
mbed_official 8:69ce7aaad4c4 154 dac_write(obj, (int)(value * (float)DAC_RANGE));
bogdanm 0:9b334a45a8ff 155 }
bogdanm 0:9b334a45a8ff 156 }
bogdanm 0:9b334a45a8ff 157
mbed_official 8:69ce7aaad4c4 158 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 8:69ce7aaad4c4 159 dac_write(obj, value >> (16 - DAC_NB_BITS));
bogdanm 0:9b334a45a8ff 160 }
bogdanm 0:9b334a45a8ff 161
mbed_official 8:69ce7aaad4c4 162 float analogout_read(dac_t *obj) {
bogdanm 0:9b334a45a8ff 163 uint32_t value = dac_read(obj);
mbed_official 8:69ce7aaad4c4 164 return (float)value * (1.0f / (float)DAC_RANGE);
bogdanm 0:9b334a45a8ff 165 }
bogdanm 0:9b334a45a8ff 166
mbed_official 8:69ce7aaad4c4 167 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 8:69ce7aaad4c4 168 uint32_t value = dac_read(obj);
mbed_official 8:69ce7aaad4c4 169 return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits
bogdanm 0:9b334a45a8ff 170 }
bogdanm 0:9b334a45a8ff 171
bogdanm 0:9b334a45a8ff 172 #endif // DEVICE_ANALOGOUT