Andrew SaLoutos / mbed-dev-STM-lean

From Ben Katz mbed-dev library. Removed unnecessary target files to reduce the overall size by a factor of 10 to make it easier to import into the online IDE.

Dependents:   motor_driver motor_driver_screaming_fix

targets/TARGET_STM/analogout_api.c@0:083111ae2a11, 2020-11-26 (annotated)

Committer:
saloutos
Date:
Thu Nov 26 04:08:56 2020 +0000
Revision:
0:083111ae2a11
first commit of leaned mbed dev lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
saloutos 0:083111ae2a11 1 /* mbed Microcontroller Library
saloutos 0:083111ae2a11 2 * Copyright (c) 2017, STMicroelectronics
saloutos 0:083111ae2a11 3 * All rights reserved.
saloutos 0:083111ae2a11 4 *
saloutos 0:083111ae2a11 5 * Redistribution and use in source and binary forms, with or without
saloutos 0:083111ae2a11 6 * modification, are permitted provided that the following conditions are met:
saloutos 0:083111ae2a11 7 *
saloutos 0:083111ae2a11 8 * 1. Redistributions of source code must retain the above copyright notice,
saloutos 0:083111ae2a11 9 * this list of conditions and the following disclaimer.
saloutos 0:083111ae2a11 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
saloutos 0:083111ae2a11 11 * this list of conditions and the following disclaimer in the documentation
saloutos 0:083111ae2a11 12 * and/or other materials provided with the distribution.
saloutos 0:083111ae2a11 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
saloutos 0:083111ae2a11 14 * may be used to endorse or promote products derived from this software
saloutos 0:083111ae2a11 15 * without specific prior written permission.
saloutos 0:083111ae2a11 16 *
saloutos 0:083111ae2a11 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
saloutos 0:083111ae2a11 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
saloutos 0:083111ae2a11 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
saloutos 0:083111ae2a11 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
saloutos 0:083111ae2a11 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
saloutos 0:083111ae2a11 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
saloutos 0:083111ae2a11 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
saloutos 0:083111ae2a11 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
saloutos 0:083111ae2a11 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
saloutos 0:083111ae2a11 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
saloutos 0:083111ae2a11 27 */
saloutos 0:083111ae2a11 28 #include "mbed_assert.h"
saloutos 0:083111ae2a11 29 #include "analogout_api.h"
saloutos 0:083111ae2a11 30
saloutos 0:083111ae2a11 31 #if DEVICE_ANALOGOUT
saloutos 0:083111ae2a11 32
saloutos 0:083111ae2a11 33 #include "cmsis.h"
saloutos 0:083111ae2a11 34 #include "pinmap.h"
saloutos 0:083111ae2a11 35 #include "mbed_error.h"
saloutos 0:083111ae2a11 36 #include "PeripheralPins.h"
saloutos 0:083111ae2a11 37
saloutos 0:083111ae2a11 38 #define DAC_RANGE (0xFFF) // 12 bits
saloutos 0:083111ae2a11 39 #define DAC_NB_BITS (12)
saloutos 0:083111ae2a11 40
saloutos 0:083111ae2a11 41 static inline void dac_write(dac_t *obj, int value)
saloutos 0:083111ae2a11 42 {
saloutos 0:083111ae2a11 43 HAL_DAC_SetValue(&obj->handle, obj->channel, DAC_ALIGN_12B_R, (value & DAC_RANGE));
saloutos 0:083111ae2a11 44 HAL_DAC_Start(&obj->handle, obj->channel);
saloutos 0:083111ae2a11 45 }
saloutos 0:083111ae2a11 46
saloutos 0:083111ae2a11 47 static inline int dac_read(dac_t *obj)
saloutos 0:083111ae2a11 48 {
saloutos 0:083111ae2a11 49 return (int)HAL_DAC_GetValue(&obj->handle, obj->channel);
saloutos 0:083111ae2a11 50 }
saloutos 0:083111ae2a11 51
saloutos 0:083111ae2a11 52 void analogout_write(dac_t *obj, float value)
saloutos 0:083111ae2a11 53 {
saloutos 0:083111ae2a11 54 if (value < 0.0f) {
saloutos 0:083111ae2a11 55 dac_write(obj, 0); // Min value
saloutos 0:083111ae2a11 56 } else if (value > 1.0f) {
saloutos 0:083111ae2a11 57 dac_write(obj, (int)DAC_RANGE); // Max value
saloutos 0:083111ae2a11 58 } else {
saloutos 0:083111ae2a11 59 dac_write(obj, (int)(value * (float)DAC_RANGE));
saloutos 0:083111ae2a11 60 }
saloutos 0:083111ae2a11 61 }
saloutos 0:083111ae2a11 62
saloutos 0:083111ae2a11 63 void analogout_write_u16(dac_t *obj, uint16_t value)
saloutos 0:083111ae2a11 64 {
saloutos 0:083111ae2a11 65 dac_write(obj, value >> (16 - DAC_NB_BITS));
saloutos 0:083111ae2a11 66 }
saloutos 0:083111ae2a11 67
saloutos 0:083111ae2a11 68 float analogout_read(dac_t *obj)
saloutos 0:083111ae2a11 69 {
saloutos 0:083111ae2a11 70 uint32_t value = dac_read(obj);
saloutos 0:083111ae2a11 71 return (float)value * (1.0f / (float)DAC_RANGE);
saloutos 0:083111ae2a11 72 }
saloutos 0:083111ae2a11 73
saloutos 0:083111ae2a11 74 uint16_t analogout_read_u16(dac_t *obj)
saloutos 0:083111ae2a11 75 {
saloutos 0:083111ae2a11 76 uint32_t value = dac_read(obj);
saloutos 0:083111ae2a11 77 return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits
saloutos 0:083111ae2a11 78 }
saloutos 0:083111ae2a11 79
saloutos 0:083111ae2a11 80 #endif // DEVICE_ANALOGOUT