Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/targets/TARGET_STM/analogin_api.c@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 /* mbed Microcontroller Library
lypinator 0:bb348c97df44 2 * Copyright (c) 2017, STMicroelectronics
lypinator 0:bb348c97df44 3 * All rights reserved.
lypinator 0:bb348c97df44 4 *
lypinator 0:bb348c97df44 5 * Redistribution and use in source and binary forms, with or without
lypinator 0:bb348c97df44 6 * modification, are permitted provided that the following conditions are met:
lypinator 0:bb348c97df44 7 *
lypinator 0:bb348c97df44 8 * 1. Redistributions of source code must retain the above copyright notice,
lypinator 0:bb348c97df44 9 * this list of conditions and the following disclaimer.
lypinator 0:bb348c97df44 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
lypinator 0:bb348c97df44 11 * this list of conditions and the following disclaimer in the documentation
lypinator 0:bb348c97df44 12 * and/or other materials provided with the distribution.
lypinator 0:bb348c97df44 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
lypinator 0:bb348c97df44 14 * may be used to endorse or promote products derived from this software
lypinator 0:bb348c97df44 15 * without specific prior written permission.
lypinator 0:bb348c97df44 16 *
lypinator 0:bb348c97df44 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
lypinator 0:bb348c97df44 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
lypinator 0:bb348c97df44 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
lypinator 0:bb348c97df44 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
lypinator 0:bb348c97df44 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
lypinator 0:bb348c97df44 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
lypinator 0:bb348c97df44 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
lypinator 0:bb348c97df44 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
lypinator 0:bb348c97df44 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
lypinator 0:bb348c97df44 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
lypinator 0:bb348c97df44 27 */
lypinator 0:bb348c97df44 28 #include "analogin_api.h"
lypinator 0:bb348c97df44 29
lypinator 0:bb348c97df44 30 #if DEVICE_ANALOGIN
lypinator 0:bb348c97df44 31
lypinator 0:bb348c97df44 32 uint16_t adc_read(analogin_t *obj);
lypinator 0:bb348c97df44 33
lypinator 0:bb348c97df44 34 uint16_t analogin_read_u16(analogin_t *obj)
lypinator 0:bb348c97df44 35 {
lypinator 0:bb348c97df44 36 uint16_t value = adc_read(obj);
lypinator 0:bb348c97df44 37 // 12-bit to 16-bit conversion
lypinator 0:bb348c97df44 38 value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F);
lypinator 0:bb348c97df44 39 return value;
lypinator 0:bb348c97df44 40 }
lypinator 0:bb348c97df44 41
lypinator 0:bb348c97df44 42 float analogin_read(analogin_t *obj)
lypinator 0:bb348c97df44 43 {
lypinator 0:bb348c97df44 44 uint16_t value = adc_read(obj);
lypinator 0:bb348c97df44 45 return (float)value * (1.0f / (float)0xFFF); // 12 bits range
lypinator 0:bb348c97df44 46 }
lypinator 0:bb348c97df44 47
lypinator 0:bb348c97df44 48 #endif