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targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/analogout_api.c@181:a4cbdfbbd2f4, 2014-05-07 (annotated)

Committer:
mbed_official
Date:
Wed May 07 13:15:08 2014 +0100
Revision:
181:a4cbdfbbd2f4
Child:
201:fa203361dc70
Synchronized with git revision 7751e759576c6fd68deccb81ea82bac19ed41745



Full URL: https://github.com/mbedmicro/mbed/commit/7751e759576c6fd68deccb81ea82bac19ed41745/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 * Copyright (c) 2014, 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 181:a4cbdfbbd2f4 28 #include "analogout_api.h"
mbed_official 181:a4cbdfbbd2f4 29
mbed_official 181:a4cbdfbbd2f4 30 #if DEVICE_ANALOGOUT
mbed_official 181:a4cbdfbbd2f4 31
mbed_official 181:a4cbdfbbd2f4 32 #include "cmsis.h"
mbed_official 181:a4cbdfbbd2f4 33 #include "pinmap.h"
mbed_official 181:a4cbdfbbd2f4 34 #include "error.h"
mbed_official 181:a4cbdfbbd2f4 35
mbed_official 181:a4cbdfbbd2f4 36 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 181:a4cbdfbbd2f4 37
mbed_official 181:a4cbdfbbd2f4 38 static const PinMap PinMap_DAC[] = {
mbed_official 181:a4cbdfbbd2f4 39 {PA_4, DAC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // DAC_OUT
mbed_official 181:a4cbdfbbd2f4 40 {NC, NC, 0}
mbed_official 181:a4cbdfbbd2f4 41 };
mbed_official 181:a4cbdfbbd2f4 42
mbed_official 181:a4cbdfbbd2f4 43 static DAC_HandleTypeDef DacHandle;
mbed_official 181:a4cbdfbbd2f4 44
mbed_official 181:a4cbdfbbd2f4 45 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 181:a4cbdfbbd2f4 46 DAC_ChannelConfTypeDef sConfig;
mbed_official 181:a4cbdfbbd2f4 47
mbed_official 181:a4cbdfbbd2f4 48 DacHandle.Instance = DAC;
mbed_official 181:a4cbdfbbd2f4 49
mbed_official 181:a4cbdfbbd2f4 50 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
mbed_official 181:a4cbdfbbd2f4 51 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 181:a4cbdfbbd2f4 52
mbed_official 181:a4cbdfbbd2f4 53 if (obj->dac == (DACName)NC) {
mbed_official 181:a4cbdfbbd2f4 54 error("DAC pin mapping failed");
mbed_official 181:a4cbdfbbd2f4 55 }
mbed_official 181:a4cbdfbbd2f4 56
mbed_official 181:a4cbdfbbd2f4 57 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 58 pinmap_pinout(pin, PinMap_DAC);
mbed_official 181:a4cbdfbbd2f4 59
mbed_official 181:a4cbdfbbd2f4 60 // Save the channel for future use
mbed_official 181:a4cbdfbbd2f4 61 obj->channel = pin;
mbed_official 181:a4cbdfbbd2f4 62
mbed_official 181:a4cbdfbbd2f4 63 // Enable DAC clock
mbed_official 181:a4cbdfbbd2f4 64 __DAC_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 65
mbed_official 181:a4cbdfbbd2f4 66 // Configure DAC
mbed_official 181:a4cbdfbbd2f4 67 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 181:a4cbdfbbd2f4 68 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 181:a4cbdfbbd2f4 69
mbed_official 181:a4cbdfbbd2f4 70 //if (pin == PA_4) {
mbed_official 181:a4cbdfbbd2f4 71 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 72 //}
mbed_official 181:a4cbdfbbd2f4 73
mbed_official 181:a4cbdfbbd2f4 74 analogout_write_u16(obj, 0);
mbed_official 181:a4cbdfbbd2f4 75 }
mbed_official 181:a4cbdfbbd2f4 76
mbed_official 181:a4cbdfbbd2f4 77 void analogout_free(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 78 // Disable DAC
mbed_official 181:a4cbdfbbd2f4 79 __DAC_FORCE_RESET();
mbed_official 181:a4cbdfbbd2f4 80 __DAC_RELEASE_RESET();
mbed_official 181:a4cbdfbbd2f4 81 __DAC_CLK_DISABLE();
mbed_official 181:a4cbdfbbd2f4 82 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 83 pin_function(obj->channel, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 84 }
mbed_official 181:a4cbdfbbd2f4 85
mbed_official 181:a4cbdfbbd2f4 86 static inline void dac_write(dac_t *obj, uint16_t value) {
mbed_official 181:a4cbdfbbd2f4 87 //if (obj->channel == PA_4) {
mbed_official 181:a4cbdfbbd2f4 88 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 181:a4cbdfbbd2f4 89 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 90 //}
mbed_official 181:a4cbdfbbd2f4 91 }
mbed_official 181:a4cbdfbbd2f4 92
mbed_official 181:a4cbdfbbd2f4 93 static inline int dac_read(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 94 //if (obj->channel == PA_4) {
mbed_official 181:a4cbdfbbd2f4 95 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 96 //}
mbed_official 181:a4cbdfbbd2f4 97 }
mbed_official 181:a4cbdfbbd2f4 98
mbed_official 181:a4cbdfbbd2f4 99 void analogout_write(dac_t *obj, float value) {
mbed_official 181:a4cbdfbbd2f4 100 if (value < 0.0f) {
mbed_official 181:a4cbdfbbd2f4 101 dac_write(obj, 0); // Min value
mbed_official 181:a4cbdfbbd2f4 102 } else if (value > 1.0f) {
mbed_official 181:a4cbdfbbd2f4 103 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 104 } else {
mbed_official 181:a4cbdfbbd2f4 105 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 106 }
mbed_official 181:a4cbdfbbd2f4 107 }
mbed_official 181:a4cbdfbbd2f4 108
mbed_official 181:a4cbdfbbd2f4 109 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 181:a4cbdfbbd2f4 110 if (value > (uint16_t)DAC_RANGE) {
mbed_official 181:a4cbdfbbd2f4 111 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 112 } else {
mbed_official 181:a4cbdfbbd2f4 113 dac_write(obj, value);
mbed_official 181:a4cbdfbbd2f4 114 }
mbed_official 181:a4cbdfbbd2f4 115 }
mbed_official 181:a4cbdfbbd2f4 116
mbed_official 181:a4cbdfbbd2f4 117 float analogout_read(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 118 uint32_t value = dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 119 return (float)((float)value * (1.0f / (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 120 }
mbed_official 181:a4cbdfbbd2f4 121
mbed_official 181:a4cbdfbbd2f4 122 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 123 return (uint16_t)dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 124 }
mbed_official 181:a4cbdfbbd2f4 125
mbed_official 181:a4cbdfbbd2f4 126 #endif // DEVICE_ANALOGOUT