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Mbed for VNG board

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F334R8/analogout_api.c@414:4ec4c5b614b0, 2014-11-25 (annotated)

Committer:
mbed_official
Date:
Tue Nov 25 07:15:09 2014 +0000
Revision:
414:4ec4c5b614b0
Parent:
404:cbc7dfcb0ce9 
Synchronized with git revision fbc74e874ac089c6cb05add312fb5422be628886



Full URL: https://github.com/mbedmicro/mbed/commit/fbc74e874ac089c6cb05add312fb5422be628886/



Targets: NUCLEOs - Add PeripheralPins files for all nucleo targets

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 237:f3da66175598 1 /* mbed Microcontroller Library
mbed_official 237:f3da66175598 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 237:f3da66175598 3 * All rights reserved.
mbed_official 237:f3da66175598 4 *
mbed_official 237:f3da66175598 5 * Redistribution and use in source and binary forms, with or without
mbed_official 237:f3da66175598 6 * modification, are permitted provided that the following conditions are met:
mbed_official 237:f3da66175598 7 *
mbed_official 237:f3da66175598 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 237:f3da66175598 9 * this list of conditions and the following disclaimer.
mbed_official 237:f3da66175598 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 237:f3da66175598 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 237:f3da66175598 12 * and/or other materials provided with the distribution.
mbed_official 237:f3da66175598 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 237:f3da66175598 14 * may be used to endorse or promote products derived from this software
mbed_official 237:f3da66175598 15 * without specific prior written permission.
mbed_official 237:f3da66175598 16 *
mbed_official 237:f3da66175598 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 237:f3da66175598 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 237:f3da66175598 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 237:f3da66175598 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 237:f3da66175598 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 237:f3da66175598 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 237:f3da66175598 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 237:f3da66175598 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 237:f3da66175598 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 237:f3da66175598 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 237:f3da66175598 27 */
mbed_official 237:f3da66175598 28 #include "mbed_assert.h"
mbed_official 237:f3da66175598 29 #include "analogout_api.h"
mbed_official 237:f3da66175598 30
mbed_official 237:f3da66175598 31 #if DEVICE_ANALOGOUT
mbed_official 237:f3da66175598 32
mbed_official 237:f3da66175598 33 #include "cmsis.h"
mbed_official 237:f3da66175598 34 #include "pinmap.h"
mbed_official 285:31249416b6f9 35 #include "mbed_error.h"
mbed_official 414:4ec4c5b614b0 36 #include "PeripheralPins.h"
mbed_official 237:f3da66175598 37
mbed_official 237:f3da66175598 38 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 237:f3da66175598 39
mbed_official 237:f3da66175598 40 static DAC_HandleTypeDef DacHandle;
mbed_official 237:f3da66175598 41
mbed_official 237:f3da66175598 42 // These variables are used for the "free" function
mbed_official 237:f3da66175598 43 static int pa4_used = 0;
mbed_official 237:f3da66175598 44 static int pa5_used = 0;
mbed_official 237:f3da66175598 45
mbed_official 237:f3da66175598 46 void analogout_init(dac_t *obj, PinName pin)
mbed_official 237:f3da66175598 47 {
mbed_official 237:f3da66175598 48 DAC_ChannelConfTypeDef sConfig;
mbed_official 237:f3da66175598 49
mbed_official 414:4ec4c5b614b0 50 // Get the peripheral name from the pin and assign it to the object
mbed_official 237:f3da66175598 51 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 237:f3da66175598 52 MBED_ASSERT(obj->dac != (DACName)NC);
mbed_official 237:f3da66175598 53
mbed_official 237:f3da66175598 54 // Configure GPIO
mbed_official 237:f3da66175598 55 pinmap_pinout(pin, PinMap_DAC);
mbed_official 237:f3da66175598 56
mbed_official 237:f3da66175598 57 // Save the pin for future use
mbed_official 237:f3da66175598 58 obj->pin = pin;
mbed_official 237:f3da66175598 59
mbed_official 237:f3da66175598 60 // Enable DAC clock
mbed_official 237:f3da66175598 61 if (obj->dac == DAC_1) {
mbed_official 237:f3da66175598 62 __DAC1_CLK_ENABLE();
mbed_official 237:f3da66175598 63 }
mbed_official 404:cbc7dfcb0ce9 64
mbed_official 237:f3da66175598 65 if (obj->dac == DAC_2) {
mbed_official 237:f3da66175598 66 __DAC2_CLK_ENABLE();
mbed_official 237:f3da66175598 67 }
mbed_official 237:f3da66175598 68
mbed_official 237:f3da66175598 69 // Configure DAC
mbed_official 237:f3da66175598 70 DacHandle.Instance = (DAC_TypeDef *)(obj->dac);
mbed_official 237:f3da66175598 71
mbed_official 237:f3da66175598 72 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 237:f3da66175598 73 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 237:f3da66175598 74
mbed_official 237:f3da66175598 75 if (pin == PA_4) {
mbed_official 237:f3da66175598 76 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 237:f3da66175598 77 pa4_used = 1;
mbed_official 237:f3da66175598 78 }
mbed_official 237:f3da66175598 79
mbed_official 237:f3da66175598 80 if (pin == PA_5) {
mbed_official 237:f3da66175598 81 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2);
mbed_official 237:f3da66175598 82 pa5_used = 1;
mbed_official 237:f3da66175598 83 }
mbed_official 237:f3da66175598 84
mbed_official 237:f3da66175598 85 if (pin == PA_6) {
mbed_official 237:f3da66175598 86 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 237:f3da66175598 87 }
mbed_official 237:f3da66175598 88
mbed_official 237:f3da66175598 89 analogout_write_u16(obj, 0);
mbed_official 237:f3da66175598 90 }
mbed_official 237:f3da66175598 91
mbed_official 237:f3da66175598 92 void analogout_free(dac_t *obj)
mbed_official 237:f3da66175598 93 {
mbed_official 237:f3da66175598 94 // Reset DAC and disable clock
mbed_official 237:f3da66175598 95 if (obj->pin == PA_4) pa4_used = 0;
mbed_official 237:f3da66175598 96 if (obj->pin == PA_5) pa5_used = 0;
mbed_official 237:f3da66175598 97
mbed_official 237:f3da66175598 98 if ((pa4_used == 0) && (pa5_used == 0)) {
mbed_official 237:f3da66175598 99 __DAC1_FORCE_RESET();
mbed_official 237:f3da66175598 100 __DAC1_RELEASE_RESET();
mbed_official 237:f3da66175598 101 __DAC1_CLK_DISABLE();
mbed_official 237:f3da66175598 102 }
mbed_official 237:f3da66175598 103
mbed_official 237:f3da66175598 104 if (obj->pin == PA_6) {
mbed_official 237:f3da66175598 105 __DAC2_FORCE_RESET();
mbed_official 237:f3da66175598 106 __DAC2_RELEASE_RESET();
mbed_official 237:f3da66175598 107 __DAC2_CLK_DISABLE();
mbed_official 237:f3da66175598 108 }
mbed_official 237:f3da66175598 109
mbed_official 237:f3da66175598 110 // Configure GPIO
mbed_official 237:f3da66175598 111 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 237:f3da66175598 112 }
mbed_official 237:f3da66175598 113
mbed_official 237:f3da66175598 114 static inline void dac_write(dac_t *obj, uint16_t value)
mbed_official 237:f3da66175598 115 {
mbed_official 237:f3da66175598 116 if ((obj->pin == PA_4) || (obj->pin == PA_6)) {
mbed_official 237:f3da66175598 117 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 237:f3da66175598 118 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 237:f3da66175598 119 }
mbed_official 237:f3da66175598 120
mbed_official 237:f3da66175598 121 if (obj->pin == PA_5) {
mbed_official 237:f3da66175598 122 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, value);
mbed_official 237:f3da66175598 123 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_2);
mbed_official 237:f3da66175598 124 }
mbed_official 237:f3da66175598 125 }
mbed_official 237:f3da66175598 126
mbed_official 237:f3da66175598 127 static inline int dac_read(dac_t *obj)
mbed_official 237:f3da66175598 128 {
mbed_official 237:f3da66175598 129 if ((obj->pin == PA_4) || (obj->pin == PA_6)) {
mbed_official 237:f3da66175598 130 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 237:f3da66175598 131 } else if (obj->pin == PA_5) {
mbed_official 237:f3da66175598 132 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
mbed_official 237:f3da66175598 133 } else {
mbed_official 237:f3da66175598 134 return 0;
mbed_official 237:f3da66175598 135 }
mbed_official 237:f3da66175598 136 }
mbed_official 237:f3da66175598 137
mbed_official 237:f3da66175598 138 void analogout_write(dac_t *obj, float value)
mbed_official 237:f3da66175598 139 {
mbed_official 237:f3da66175598 140 if (value < 0.0f) {
mbed_official 237:f3da66175598 141 dac_write(obj, 0); // Min value
mbed_official 237:f3da66175598 142 } else if (value > 1.0f) {
mbed_official 237:f3da66175598 143 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 237:f3da66175598 144 } else {
mbed_official 237:f3da66175598 145 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 237:f3da66175598 146 }
mbed_official 237:f3da66175598 147 }
mbed_official 237:f3da66175598 148
mbed_official 237:f3da66175598 149 void analogout_write_u16(dac_t *obj, uint16_t value)
mbed_official 237:f3da66175598 150 {
mbed_official 237:f3da66175598 151 if (value > (uint16_t)DAC_RANGE) {
mbed_official 237:f3da66175598 152 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 237:f3da66175598 153 } else {
mbed_official 237:f3da66175598 154 dac_write(obj, value);
mbed_official 237:f3da66175598 155 }
mbed_official 237:f3da66175598 156 }
mbed_official 237:f3da66175598 157
mbed_official 237:f3da66175598 158 float analogout_read(dac_t *obj)
mbed_official 237:f3da66175598 159 {
mbed_official 237:f3da66175598 160 uint32_t value = dac_read(obj);
mbed_official 237:f3da66175598 161 return (float)((float)value * (1.0f / (float)DAC_RANGE));
mbed_official 237:f3da66175598 162 }
mbed_official 237:f3da66175598 163
mbed_official 237:f3da66175598 164 uint16_t analogout_read_u16(dac_t *obj)
mbed_official 237:f3da66175598 165 {
mbed_official 237:f3da66175598 166 return (uint16_t)dac_read(obj);
mbed_official 237:f3da66175598 167 }
mbed_official 237:f3da66175598 168
mbed_official 237:f3da66175598 169 #endif // DEVICE_ANALOGOUT