Takaaki Numai / mbed-dev

inport from local

Dependents:   Hobbyking_Cheetah_0511

targets/TARGET_STM/analogout_api.c@0:85b3fd62ea1a, 2020-03-16 (annotated)

Committer:
NYX
Date:
Mon Mar 16 06:35:48 2020 +0000
Revision:
0:85b3fd62ea1a
reinport to mbed;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
NYX 0:85b3fd62ea1a 1 /* mbed Microcontroller Library
NYX 0:85b3fd62ea1a 2 * Copyright (c) 2017, STMicroelectronics
NYX 0:85b3fd62ea1a 3 * All rights reserved.
NYX 0:85b3fd62ea1a 4 *
NYX 0:85b3fd62ea1a 5 * Redistribution and use in source and binary forms, with or without
NYX 0:85b3fd62ea1a 6 * modification, are permitted provided that the following conditions are met:
NYX 0:85b3fd62ea1a 7 *
NYX 0:85b3fd62ea1a 8 * 1. Redistributions of source code must retain the above copyright notice,
NYX 0:85b3fd62ea1a 9 * this list of conditions and the following disclaimer.
NYX 0:85b3fd62ea1a 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
NYX 0:85b3fd62ea1a 11 * this list of conditions and the following disclaimer in the documentation
NYX 0:85b3fd62ea1a 12 * and/or other materials provided with the distribution.
NYX 0:85b3fd62ea1a 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
NYX 0:85b3fd62ea1a 14 * may be used to endorse or promote products derived from this software
NYX 0:85b3fd62ea1a 15 * without specific prior written permission.
NYX 0:85b3fd62ea1a 16 *
NYX 0:85b3fd62ea1a 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
NYX 0:85b3fd62ea1a 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
NYX 0:85b3fd62ea1a 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
NYX 0:85b3fd62ea1a 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
NYX 0:85b3fd62ea1a 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
NYX 0:85b3fd62ea1a 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
NYX 0:85b3fd62ea1a 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
NYX 0:85b3fd62ea1a 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
NYX 0:85b3fd62ea1a 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
NYX 0:85b3fd62ea1a 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
NYX 0:85b3fd62ea1a 27 */
NYX 0:85b3fd62ea1a 28 #include "mbed_assert.h"
NYX 0:85b3fd62ea1a 29 #include "analogout_api.h"
NYX 0:85b3fd62ea1a 30
NYX 0:85b3fd62ea1a 31 #if DEVICE_ANALOGOUT
NYX 0:85b3fd62ea1a 32
NYX 0:85b3fd62ea1a 33 #include "cmsis.h"
NYX 0:85b3fd62ea1a 34 #include "pinmap.h"
NYX 0:85b3fd62ea1a 35 #include "mbed_error.h"
NYX 0:85b3fd62ea1a 36 #include "PeripheralPins.h"
NYX 0:85b3fd62ea1a 37
NYX 0:85b3fd62ea1a 38 #define DAC_RANGE (0xFFF) // 12 bits
NYX 0:85b3fd62ea1a 39 #define DAC_NB_BITS (12)
NYX 0:85b3fd62ea1a 40
NYX 0:85b3fd62ea1a 41 static inline void dac_write(dac_t *obj, int value)
NYX 0:85b3fd62ea1a 42 {
NYX 0:85b3fd62ea1a 43 HAL_DAC_SetValue(&obj->handle, obj->channel, DAC_ALIGN_12B_R, (value & DAC_RANGE));
NYX 0:85b3fd62ea1a 44 HAL_DAC_Start(&obj->handle, obj->channel);
NYX 0:85b3fd62ea1a 45 }
NYX 0:85b3fd62ea1a 46
NYX 0:85b3fd62ea1a 47 static inline int dac_read(dac_t *obj)
NYX 0:85b3fd62ea1a 48 {
NYX 0:85b3fd62ea1a 49 return (int)HAL_DAC_GetValue(&obj->handle, obj->channel);
NYX 0:85b3fd62ea1a 50 }
NYX 0:85b3fd62ea1a 51
NYX 0:85b3fd62ea1a 52 void analogout_write(dac_t *obj, float value)
NYX 0:85b3fd62ea1a 53 {
NYX 0:85b3fd62ea1a 54 if (value < 0.0f) {
NYX 0:85b3fd62ea1a 55 dac_write(obj, 0); // Min value
NYX 0:85b3fd62ea1a 56 } else if (value > 1.0f) {
NYX 0:85b3fd62ea1a 57 dac_write(obj, (int)DAC_RANGE); // Max value
NYX 0:85b3fd62ea1a 58 } else {
NYX 0:85b3fd62ea1a 59 dac_write(obj, (int)(value * (float)DAC_RANGE));
NYX 0:85b3fd62ea1a 60 }
NYX 0:85b3fd62ea1a 61 }
NYX 0:85b3fd62ea1a 62
NYX 0:85b3fd62ea1a 63 void analogout_write_u16(dac_t *obj, uint16_t value)
NYX 0:85b3fd62ea1a 64 {
NYX 0:85b3fd62ea1a 65 dac_write(obj, value >> (16 - DAC_NB_BITS));
NYX 0:85b3fd62ea1a 66 }
NYX 0:85b3fd62ea1a 67
NYX 0:85b3fd62ea1a 68 float analogout_read(dac_t *obj)
NYX 0:85b3fd62ea1a 69 {
NYX 0:85b3fd62ea1a 70 uint32_t value = dac_read(obj);
NYX 0:85b3fd62ea1a 71 return (float)value * (1.0f / (float)DAC_RANGE);
NYX 0:85b3fd62ea1a 72 }
NYX 0:85b3fd62ea1a 73
NYX 0:85b3fd62ea1a 74 uint16_t analogout_read_u16(dac_t *obj)
NYX 0:85b3fd62ea1a 75 {
NYX 0:85b3fd62ea1a 76 uint32_t value = dac_read(obj);
NYX 0:85b3fd62ea1a 77 return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits
NYX 0:85b3fd62ea1a 78 }
NYX 0:85b3fd62ea1a 79
NYX 0:85b3fd62ea1a 80 #endif // DEVICE_ANALOGOUT