Gan likun / The prosthetic control

The prosthetic control（MIT）

targets/TARGET_STM/analogout_api.c@0:20e0c61e0684, 2022-06-23 (annotated)

Committer:
ganlikun
Date:
Thu Jun 23 05:23:34 2022 +0000
Revision:
0:20e0c61e0684
01

Who changed what in which revision?

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ganlikun 0:20e0c61e0684 1 /* mbed Microcontroller Library
ganlikun 0:20e0c61e0684 2 * Copyright (c) 2017, STMicroelectronics
ganlikun 0:20e0c61e0684 3 * All rights reserved.
ganlikun 0:20e0c61e0684 4 *
ganlikun 0:20e0c61e0684 5 * Redistribution and use in source and binary forms, with or without
ganlikun 0:20e0c61e0684 6 * modification, are permitted provided that the following conditions are met:
ganlikun 0:20e0c61e0684 7 *
ganlikun 0:20e0c61e0684 8 * 1. Redistributions of source code must retain the above copyright notice,
ganlikun 0:20e0c61e0684 9 * this list of conditions and the following disclaimer.
ganlikun 0:20e0c61e0684 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
ganlikun 0:20e0c61e0684 11 * this list of conditions and the following disclaimer in the documentation
ganlikun 0:20e0c61e0684 12 * and/or other materials provided with the distribution.
ganlikun 0:20e0c61e0684 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
ganlikun 0:20e0c61e0684 14 * may be used to endorse or promote products derived from this software
ganlikun 0:20e0c61e0684 15 * without specific prior written permission.
ganlikun 0:20e0c61e0684 16 *
ganlikun 0:20e0c61e0684 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
ganlikun 0:20e0c61e0684 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ganlikun 0:20e0c61e0684 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
ganlikun 0:20e0c61e0684 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
ganlikun 0:20e0c61e0684 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ganlikun 0:20e0c61e0684 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
ganlikun 0:20e0c61e0684 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
ganlikun 0:20e0c61e0684 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
ganlikun 0:20e0c61e0684 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
ganlikun 0:20e0c61e0684 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ganlikun 0:20e0c61e0684 27 */
ganlikun 0:20e0c61e0684 28 #include "mbed_assert.h"
ganlikun 0:20e0c61e0684 29 #include "analogout_api.h"
ganlikun 0:20e0c61e0684 30
ganlikun 0:20e0c61e0684 31 #if DEVICE_ANALOGOUT
ganlikun 0:20e0c61e0684 32
ganlikun 0:20e0c61e0684 33 #include "cmsis.h"
ganlikun 0:20e0c61e0684 34 #include "pinmap.h"
ganlikun 0:20e0c61e0684 35 #include "mbed_error.h"
ganlikun 0:20e0c61e0684 36 #include "PeripheralPins.h"
ganlikun 0:20e0c61e0684 37
ganlikun 0:20e0c61e0684 38 #define DAC_RANGE (0xFFF) // 12 bits
ganlikun 0:20e0c61e0684 39 #define DAC_NB_BITS (12)
ganlikun 0:20e0c61e0684 40
ganlikun 0:20e0c61e0684 41 static inline void dac_write(dac_t *obj, int value)
ganlikun 0:20e0c61e0684 42 {
ganlikun 0:20e0c61e0684 43 HAL_DAC_SetValue(&obj->handle, obj->channel, DAC_ALIGN_12B_R, (value & DAC_RANGE));
ganlikun 0:20e0c61e0684 44 HAL_DAC_Start(&obj->handle, obj->channel);
ganlikun 0:20e0c61e0684 45 }
ganlikun 0:20e0c61e0684 46
ganlikun 0:20e0c61e0684 47 static inline int dac_read(dac_t *obj)
ganlikun 0:20e0c61e0684 48 {
ganlikun 0:20e0c61e0684 49 return (int)HAL_DAC_GetValue(&obj->handle, obj->channel);
ganlikun 0:20e0c61e0684 50 }
ganlikun 0:20e0c61e0684 51
ganlikun 0:20e0c61e0684 52 void analogout_write(dac_t *obj, float value)
ganlikun 0:20e0c61e0684 53 {
ganlikun 0:20e0c61e0684 54 if (value < 0.0f) {
ganlikun 0:20e0c61e0684 55 dac_write(obj, 0); // Min value
ganlikun 0:20e0c61e0684 56 } else if (value > 1.0f) {
ganlikun 0:20e0c61e0684 57 dac_write(obj, (int)DAC_RANGE); // Max value
ganlikun 0:20e0c61e0684 58 } else {
ganlikun 0:20e0c61e0684 59 dac_write(obj, (int)(value * (float)DAC_RANGE));
ganlikun 0:20e0c61e0684 60 }
ganlikun 0:20e0c61e0684 61 }
ganlikun 0:20e0c61e0684 62
ganlikun 0:20e0c61e0684 63 void analogout_write_u16(dac_t *obj, uint16_t value)
ganlikun 0:20e0c61e0684 64 {
ganlikun 0:20e0c61e0684 65 dac_write(obj, value >> (16 - DAC_NB_BITS));
ganlikun 0:20e0c61e0684 66 }
ganlikun 0:20e0c61e0684 67
ganlikun 0:20e0c61e0684 68 float analogout_read(dac_t *obj)
ganlikun 0:20e0c61e0684 69 {
ganlikun 0:20e0c61e0684 70 uint32_t value = dac_read(obj);
ganlikun 0:20e0c61e0684 71 return (float)value * (1.0f / (float)DAC_RANGE);
ganlikun 0:20e0c61e0684 72 }
ganlikun 0:20e0c61e0684 73
ganlikun 0:20e0c61e0684 74 uint16_t analogout_read_u16(dac_t *obj)
ganlikun 0:20e0c61e0684 75 {
ganlikun 0:20e0c61e0684 76 uint32_t value = dac_read(obj);
ganlikun 0:20e0c61e0684 77 return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits
ganlikun 0:20e0c61e0684 78 }
ganlikun 0:20e0c61e0684 79
ganlikun 0:20e0c61e0684 80 #endif // DEVICE_ANALOGOUT
ganlikun 0:20e0c61e0684 81