Toyomasa Watarai / mbed-dev

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of mbed-dev by mbed official

targets/hal/TARGET_STM/TARGET_STM32F3XX/analogout_api.c@68:53d4cfd70523, 2016-02-19 (annotated)

Committer:
MACRUM
Date:
Fri Feb 19 06:16:11 2016 +0000
Revision:
68:53d4cfd70523
Parent:
0:9b334a45a8ff 
Add state reset code in analogin_init() for Nucleo F303K8 target

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 * Copyright (c) 2014, 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
bogdanm 0:9b334a45a8ff 36 #define RANGE_12BIT (0xFFF)
bogdanm 0:9b334a45a8ff 37
bogdanm 0:9b334a45a8ff 38 static const PinMap PinMap_DAC[] = {
bogdanm 0:9b334a45a8ff 39 {PA_4, DAC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // DAC_OUT1
bogdanm 0:9b334a45a8ff 40 {NC, NC, 0}
bogdanm 0:9b334a45a8ff 41 };
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 void analogout_init(dac_t *obj, PinName pin) {
bogdanm 0:9b334a45a8ff 44 DAC_TypeDef *dac;
bogdanm 0:9b334a45a8ff 45 DAC_InitTypeDef DAC_InitStructure;
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
bogdanm 0:9b334a45a8ff 48 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
bogdanm 0:9b334a45a8ff 49 MBED_ASSERT(obj->dac == (DACName)NC);
bogdanm 0:9b334a45a8ff 50
bogdanm 0:9b334a45a8ff 51 dac = (DAC_TypeDef *)(obj->dac);
bogdanm 0:9b334a45a8ff 52
bogdanm 0:9b334a45a8ff 53 // Configure GPIO
bogdanm 0:9b334a45a8ff 54 pinmap_pinout(pin, PinMap_DAC);
bogdanm 0:9b334a45a8ff 55
bogdanm 0:9b334a45a8ff 56 // Save the channel for the write and read functions
bogdanm 0:9b334a45a8ff 57 obj->channel = pin;
bogdanm 0:9b334a45a8ff 58
bogdanm 0:9b334a45a8ff 59 // Enable DAC clock
bogdanm 0:9b334a45a8ff 60 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
bogdanm 0:9b334a45a8ff 61
bogdanm 0:9b334a45a8ff 62 // Configure and enable DAC channel
bogdanm 0:9b334a45a8ff 63 DAC_StructInit(&DAC_InitStructure);
bogdanm 0:9b334a45a8ff 64 DAC_Init(dac, DAC_Channel_1, &DAC_InitStructure);
bogdanm 0:9b334a45a8ff 65 DAC_Cmd(dac, DAC_Channel_1, ENABLE);
bogdanm 0:9b334a45a8ff 66
bogdanm 0:9b334a45a8ff 67 analogout_write_u16(obj, 0);
bogdanm 0:9b334a45a8ff 68 }
bogdanm 0:9b334a45a8ff 69
bogdanm 0:9b334a45a8ff 70 void analogout_free(dac_t *obj) {
bogdanm 0:9b334a45a8ff 71 }
bogdanm 0:9b334a45a8ff 72
bogdanm 0:9b334a45a8ff 73 static inline void dac_write(dac_t *obj, uint16_t value) {
bogdanm 0:9b334a45a8ff 74 DAC_TypeDef *dac = (DAC_TypeDef *)(obj->dac);
bogdanm 0:9b334a45a8ff 75 DAC_SetChannel1Data(dac, DAC_Align_12b_R, value);
bogdanm 0:9b334a45a8ff 76 }
bogdanm 0:9b334a45a8ff 77
bogdanm 0:9b334a45a8ff 78 static inline int dac_read(dac_t *obj) {
bogdanm 0:9b334a45a8ff 79 DAC_TypeDef *dac = (DAC_TypeDef *)(obj->dac);
bogdanm 0:9b334a45a8ff 80 return (int)DAC_GetDataOutputValue(dac, DAC_Channel_1);
bogdanm 0:9b334a45a8ff 81 }
bogdanm 0:9b334a45a8ff 82
bogdanm 0:9b334a45a8ff 83 void analogout_write(dac_t *obj, float value) {
bogdanm 0:9b334a45a8ff 84 if (value < 0.0f) {
bogdanm 0:9b334a45a8ff 85 dac_write(obj, 0); // Min value
bogdanm 0:9b334a45a8ff 86 } else if (value > 1.0f) {
bogdanm 0:9b334a45a8ff 87 dac_write(obj, (uint16_t)RANGE_12BIT); // Max value
bogdanm 0:9b334a45a8ff 88 } else {
bogdanm 0:9b334a45a8ff 89 dac_write(obj, (uint16_t)(value * (float)RANGE_12BIT));
bogdanm 0:9b334a45a8ff 90 }
bogdanm 0:9b334a45a8ff 91 }
bogdanm 0:9b334a45a8ff 92
bogdanm 0:9b334a45a8ff 93 void analogout_write_u16(dac_t *obj, uint16_t value) {
bogdanm 0:9b334a45a8ff 94 if (value > (uint16_t)RANGE_12BIT) {
bogdanm 0:9b334a45a8ff 95 dac_write(obj, (uint16_t)RANGE_12BIT); // Max value
bogdanm 0:9b334a45a8ff 96 } else {
bogdanm 0:9b334a45a8ff 97 dac_write(obj, value);
bogdanm 0:9b334a45a8ff 98 }
bogdanm 0:9b334a45a8ff 99 }
bogdanm 0:9b334a45a8ff 100
bogdanm 0:9b334a45a8ff 101 float analogout_read(dac_t *obj) {
bogdanm 0:9b334a45a8ff 102 uint32_t value = dac_read(obj);
bogdanm 0:9b334a45a8ff 103 return (float)value * (1.0f / (float)RANGE_12BIT);
bogdanm 0:9b334a45a8ff 104 }
bogdanm 0:9b334a45a8ff 105
bogdanm 0:9b334a45a8ff 106 uint16_t analogout_read_u16(dac_t *obj) {
bogdanm 0:9b334a45a8ff 107 return (uint16_t)dac_read(obj);
bogdanm 0:9b334a45a8ff 108 }
bogdanm 0:9b334a45a8ff 109
bogdanm 0:9b334a45a8ff 110 #endif // DEVICE_ANALOGOUT