mbed official / mbed-src

mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_STM32F3XX/analogout_api.c@621:9c82b0f79f3d, 2015-09-11 (annotated)

Committer:
mbed_official
Date:
Fri Sep 11 09:30:09 2015 +0100
Revision:
621:9c82b0f79f3d
Parent:
227:7bd0639b8911 
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538



Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/



ignore target files not supported by the yotta module

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 155:8435094ec241 1 /* mbed Microcontroller Library
mbed_official 155:8435094ec241 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 155:8435094ec241 3 * All rights reserved.
mbed_official 155:8435094ec241 4 *
mbed_official 155:8435094ec241 5 * Redistribution and use in source and binary forms, with or without
mbed_official 155:8435094ec241 6 * modification, are permitted provided that the following conditions are met:
mbed_official 155:8435094ec241 7 *
mbed_official 155:8435094ec241 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 155:8435094ec241 9 * this list of conditions and the following disclaimer.
mbed_official 155:8435094ec241 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 155:8435094ec241 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 155:8435094ec241 12 * and/or other materials provided with the distribution.
mbed_official 155:8435094ec241 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 155:8435094ec241 14 * may be used to endorse or promote products derived from this software
mbed_official 155:8435094ec241 15 * without specific prior written permission.
mbed_official 155:8435094ec241 16 *
mbed_official 155:8435094ec241 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 155:8435094ec241 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 155:8435094ec241 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 155:8435094ec241 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 155:8435094ec241 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 155:8435094ec241 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 155:8435094ec241 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 155:8435094ec241 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 155:8435094ec241 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 155:8435094ec241 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 155:8435094ec241 27 */
mbed_official 227:7bd0639b8911 28 #include "mbed_assert.h"
mbed_official 155:8435094ec241 29 #include "analogout_api.h"
mbed_official 155:8435094ec241 30
mbed_official 155:8435094ec241 31 #if DEVICE_ANALOGOUT
mbed_official 155:8435094ec241 32
mbed_official 155:8435094ec241 33 #include "cmsis.h"
mbed_official 155:8435094ec241 34 #include "pinmap.h"
mbed_official 155:8435094ec241 35
mbed_official 155:8435094ec241 36 #define RANGE_12BIT (0xFFF)
mbed_official 155:8435094ec241 37
mbed_official 155:8435094ec241 38 static const PinMap PinMap_DAC[] = {
mbed_official 155:8435094ec241 39 {PA_4, DAC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // DAC_OUT1
mbed_official 155:8435094ec241 40 {NC, NC, 0}
mbed_official 155:8435094ec241 41 };
mbed_official 155:8435094ec241 42
mbed_official 155:8435094ec241 43 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 155:8435094ec241 44 DAC_TypeDef *dac;
mbed_official 155:8435094ec241 45 DAC_InitTypeDef DAC_InitStructure;
mbed_official 155:8435094ec241 46
mbed_official 155:8435094ec241 47 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
mbed_official 155:8435094ec241 48 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 227:7bd0639b8911 49 MBED_ASSERT(obj->dac == (DACName)NC);
mbed_official 155:8435094ec241 50
mbed_official 155:8435094ec241 51 dac = (DAC_TypeDef *)(obj->dac);
mbed_official 155:8435094ec241 52
mbed_official 155:8435094ec241 53 // Configure GPIO
mbed_official 155:8435094ec241 54 pinmap_pinout(pin, PinMap_DAC);
mbed_official 155:8435094ec241 55
mbed_official 155:8435094ec241 56 // Save the channel for the write and read functions
mbed_official 155:8435094ec241 57 obj->channel = pin;
mbed_official 155:8435094ec241 58
mbed_official 155:8435094ec241 59 // Enable DAC clock
mbed_official 155:8435094ec241 60 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
mbed_official 155:8435094ec241 61
mbed_official 155:8435094ec241 62 // Configure and enable DAC channel
mbed_official 155:8435094ec241 63 DAC_StructInit(&DAC_InitStructure);
mbed_official 155:8435094ec241 64 DAC_Init(dac, DAC_Channel_1, &DAC_InitStructure);
mbed_official 155:8435094ec241 65 DAC_Cmd(dac, DAC_Channel_1, ENABLE);
mbed_official 155:8435094ec241 66
mbed_official 155:8435094ec241 67 analogout_write_u16(obj, 0);
mbed_official 155:8435094ec241 68 }
mbed_official 155:8435094ec241 69
mbed_official 155:8435094ec241 70 void analogout_free(dac_t *obj) {
mbed_official 155:8435094ec241 71 }
mbed_official 155:8435094ec241 72
mbed_official 155:8435094ec241 73 static inline void dac_write(dac_t *obj, uint16_t value) {
mbed_official 155:8435094ec241 74 DAC_TypeDef *dac = (DAC_TypeDef *)(obj->dac);
mbed_official 155:8435094ec241 75 DAC_SetChannel1Data(dac, DAC_Align_12b_R, value);
mbed_official 155:8435094ec241 76 }
mbed_official 155:8435094ec241 77
mbed_official 155:8435094ec241 78 static inline int dac_read(dac_t *obj) {
mbed_official 155:8435094ec241 79 DAC_TypeDef *dac = (DAC_TypeDef *)(obj->dac);
mbed_official 155:8435094ec241 80 return (int)DAC_GetDataOutputValue(dac, DAC_Channel_1);
mbed_official 155:8435094ec241 81 }
mbed_official 155:8435094ec241 82
mbed_official 155:8435094ec241 83 void analogout_write(dac_t *obj, float value) {
mbed_official 155:8435094ec241 84 if (value < 0.0f) {
mbed_official 155:8435094ec241 85 dac_write(obj, 0); // Min value
mbed_official 155:8435094ec241 86 } else if (value > 1.0f) {
mbed_official 155:8435094ec241 87 dac_write(obj, (uint16_t)RANGE_12BIT); // Max value
mbed_official 155:8435094ec241 88 } else {
mbed_official 155:8435094ec241 89 dac_write(obj, (uint16_t)(value * (float)RANGE_12BIT));
mbed_official 155:8435094ec241 90 }
mbed_official 155:8435094ec241 91 }
mbed_official 155:8435094ec241 92
mbed_official 155:8435094ec241 93 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 155:8435094ec241 94 if (value > (uint16_t)RANGE_12BIT) {
mbed_official 155:8435094ec241 95 dac_write(obj, (uint16_t)RANGE_12BIT); // Max value
mbed_official 155:8435094ec241 96 } else {
mbed_official 155:8435094ec241 97 dac_write(obj, value);
mbed_official 155:8435094ec241 98 }
mbed_official 155:8435094ec241 99 }
mbed_official 155:8435094ec241 100
mbed_official 155:8435094ec241 101 float analogout_read(dac_t *obj) {
mbed_official 155:8435094ec241 102 uint32_t value = dac_read(obj);
mbed_official 155:8435094ec241 103 return (float)value * (1.0f / (float)RANGE_12BIT);
mbed_official 155:8435094ec241 104 }
mbed_official 155:8435094ec241 105
mbed_official 155:8435094ec241 106 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 155:8435094ec241 107 return (uint16_t)dac_read(obj);
mbed_official 155:8435094ec241 108 }
mbed_official 155:8435094ec241 109
mbed_official 155:8435094ec241 110 #endif // DEVICE_ANALOGOUT