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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/analogout_api.c@440:8a0b45cd594f, 2014-12-16 (annotated)

Committer:
mbed_official
Date:
Tue Dec 16 08:15:08 2014 +0000
Revision:
440:8a0b45cd594f
Parent:
414:4ec4c5b614b0
Child:
489:119543c9f674
Synchronized with git revision 67fbbf0b635d0c0d93fbe433306c537c2ad206aa



Full URL: https://github.com/mbedmicro/mbed/commit/67fbbf0b635d0c0d93fbe433306c537c2ad206aa/



Targets: nrf51 - updating app_timer.c from Norid'c SDKv7.1.0

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 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 402:09075a3b15e3 42 void analogout_init(dac_t *obj, PinName pin)
mbed_official 402:09075a3b15e3 43 {
mbed_official 181:a4cbdfbbd2f4 44 DAC_ChannelConfTypeDef sConfig;
mbed_official 181:a4cbdfbbd2f4 45
mbed_official 181:a4cbdfbbd2f4 46 DacHandle.Instance = DAC;
mbed_official 181:a4cbdfbbd2f4 47
mbed_official 181:a4cbdfbbd2f4 48 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
mbed_official 181:a4cbdfbbd2f4 49 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 227:7bd0639b8911 50 MBED_ASSERT(obj->dac != (DACName)NC);
mbed_official 181:a4cbdfbbd2f4 51
mbed_official 181:a4cbdfbbd2f4 52 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 53 pinmap_pinout(pin, PinMap_DAC);
mbed_official 181:a4cbdfbbd2f4 54
mbed_official 181:a4cbdfbbd2f4 55 // Save the channel for future use
mbed_official 217:d0ccc61c1fd4 56 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 57
mbed_official 181:a4cbdfbbd2f4 58 // Enable DAC clock
mbed_official 181:a4cbdfbbd2f4 59 __DAC_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 60
mbed_official 181:a4cbdfbbd2f4 61 // Configure DAC
mbed_official 181:a4cbdfbbd2f4 62 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 181:a4cbdfbbd2f4 63 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 181:a4cbdfbbd2f4 64
mbed_official 181:a4cbdfbbd2f4 65 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 66
mbed_official 181:a4cbdfbbd2f4 67 analogout_write_u16(obj, 0);
mbed_official 181:a4cbdfbbd2f4 68 }
mbed_official 181:a4cbdfbbd2f4 69
mbed_official 402:09075a3b15e3 70 void analogout_free(dac_t *obj)
mbed_official 402:09075a3b15e3 71 {
mbed_official 201:fa203361dc70 72 // Reset DAC and disable clock
mbed_official 181:a4cbdfbbd2f4 73 __DAC_FORCE_RESET();
mbed_official 181:a4cbdfbbd2f4 74 __DAC_RELEASE_RESET();
mbed_official 181:a4cbdfbbd2f4 75 __DAC_CLK_DISABLE();
mbed_official 201:fa203361dc70 76
mbed_official 181:a4cbdfbbd2f4 77 // Configure GPIO
mbed_official 217:d0ccc61c1fd4 78 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 79 }
mbed_official 181:a4cbdfbbd2f4 80
mbed_official 402:09075a3b15e3 81 static inline void dac_write(dac_t *obj, uint16_t value)
mbed_official 402:09075a3b15e3 82 {
mbed_official 181:a4cbdfbbd2f4 83 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 181:a4cbdfbbd2f4 84 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 85 }
mbed_official 181:a4cbdfbbd2f4 86
mbed_official 402:09075a3b15e3 87 static inline int dac_read(dac_t *obj)
mbed_official 402:09075a3b15e3 88 {
mbed_official 181:a4cbdfbbd2f4 89 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 90 }
mbed_official 181:a4cbdfbbd2f4 91
mbed_official 402:09075a3b15e3 92 void analogout_write(dac_t *obj, float value)
mbed_official 402:09075a3b15e3 93 {
mbed_official 181:a4cbdfbbd2f4 94 if (value < 0.0f) {
mbed_official 181:a4cbdfbbd2f4 95 dac_write(obj, 0); // Min value
mbed_official 181:a4cbdfbbd2f4 96 } else if (value > 1.0f) {
mbed_official 181:a4cbdfbbd2f4 97 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 98 } else {
mbed_official 181:a4cbdfbbd2f4 99 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 100 }
mbed_official 181:a4cbdfbbd2f4 101 }
mbed_official 181:a4cbdfbbd2f4 102
mbed_official 402:09075a3b15e3 103 void analogout_write_u16(dac_t *obj, uint16_t value)
mbed_official 402:09075a3b15e3 104 {
mbed_official 181:a4cbdfbbd2f4 105 if (value > (uint16_t)DAC_RANGE) {
mbed_official 181:a4cbdfbbd2f4 106 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 107 } else {
mbed_official 181:a4cbdfbbd2f4 108 dac_write(obj, value);
mbed_official 181:a4cbdfbbd2f4 109 }
mbed_official 181:a4cbdfbbd2f4 110 }
mbed_official 181:a4cbdfbbd2f4 111
mbed_official 402:09075a3b15e3 112 float analogout_read(dac_t *obj)
mbed_official 402:09075a3b15e3 113 {
mbed_official 181:a4cbdfbbd2f4 114 uint32_t value = dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 115 return (float)((float)value * (1.0f / (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 116 }
mbed_official 181:a4cbdfbbd2f4 117
mbed_official 402:09075a3b15e3 118 uint16_t analogout_read_u16(dac_t *obj)
mbed_official 402:09075a3b15e3 119 {
mbed_official 181:a4cbdfbbd2f4 120 return (uint16_t)dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 121 }
mbed_official 181:a4cbdfbbd2f4 122
mbed_official 181:a4cbdfbbd2f4 123 #endif // DEVICE_ANALOGOUT