Initial commit
mbed-dev-master/targets/TARGET_STM/analogout_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?
User | Revision | Line number | New 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 "mbed_assert.h" |
lypinator | 0:bb348c97df44 | 29 | #include "analogout_api.h" |
lypinator | 0:bb348c97df44 | 30 | |
lypinator | 0:bb348c97df44 | 31 | #if DEVICE_ANALOGOUT |
lypinator | 0:bb348c97df44 | 32 | |
lypinator | 0:bb348c97df44 | 33 | #include "cmsis.h" |
lypinator | 0:bb348c97df44 | 34 | #include "pinmap.h" |
lypinator | 0:bb348c97df44 | 35 | #include "mbed_error.h" |
lypinator | 0:bb348c97df44 | 36 | #include "PeripheralPins.h" |
lypinator | 0:bb348c97df44 | 37 | |
lypinator | 0:bb348c97df44 | 38 | #define DAC_RANGE (0xFFF) // 12 bits |
lypinator | 0:bb348c97df44 | 39 | #define DAC_NB_BITS (12) |
lypinator | 0:bb348c97df44 | 40 | |
lypinator | 0:bb348c97df44 | 41 | static inline void dac_write(dac_t *obj, int value) |
lypinator | 0:bb348c97df44 | 42 | { |
lypinator | 0:bb348c97df44 | 43 | HAL_DAC_SetValue(&obj->handle, obj->channel, DAC_ALIGN_12B_R, (value & DAC_RANGE)); |
lypinator | 0:bb348c97df44 | 44 | HAL_DAC_Start(&obj->handle, obj->channel); |
lypinator | 0:bb348c97df44 | 45 | } |
lypinator | 0:bb348c97df44 | 46 | |
lypinator | 0:bb348c97df44 | 47 | static inline int dac_read(dac_t *obj) |
lypinator | 0:bb348c97df44 | 48 | { |
lypinator | 0:bb348c97df44 | 49 | return (int)HAL_DAC_GetValue(&obj->handle, obj->channel); |
lypinator | 0:bb348c97df44 | 50 | } |
lypinator | 0:bb348c97df44 | 51 | |
lypinator | 0:bb348c97df44 | 52 | void analogout_write(dac_t *obj, float value) |
lypinator | 0:bb348c97df44 | 53 | { |
lypinator | 0:bb348c97df44 | 54 | if (value < 0.0f) { |
lypinator | 0:bb348c97df44 | 55 | dac_write(obj, 0); // Min value |
lypinator | 0:bb348c97df44 | 56 | } else if (value > 1.0f) { |
lypinator | 0:bb348c97df44 | 57 | dac_write(obj, (int)DAC_RANGE); // Max value |
lypinator | 0:bb348c97df44 | 58 | } else { |
lypinator | 0:bb348c97df44 | 59 | dac_write(obj, (int)(value * (float)DAC_RANGE)); |
lypinator | 0:bb348c97df44 | 60 | } |
lypinator | 0:bb348c97df44 | 61 | } |
lypinator | 0:bb348c97df44 | 62 | |
lypinator | 0:bb348c97df44 | 63 | void analogout_write_u16(dac_t *obj, uint16_t value) |
lypinator | 0:bb348c97df44 | 64 | { |
lypinator | 0:bb348c97df44 | 65 | dac_write(obj, value >> (16 - DAC_NB_BITS)); |
lypinator | 0:bb348c97df44 | 66 | } |
lypinator | 0:bb348c97df44 | 67 | |
lypinator | 0:bb348c97df44 | 68 | float analogout_read(dac_t *obj) |
lypinator | 0:bb348c97df44 | 69 | { |
lypinator | 0:bb348c97df44 | 70 | uint32_t value = dac_read(obj); |
lypinator | 0:bb348c97df44 | 71 | return (float)value * (1.0f / (float)DAC_RANGE); |
lypinator | 0:bb348c97df44 | 72 | } |
lypinator | 0:bb348c97df44 | 73 | |
lypinator | 0:bb348c97df44 | 74 | uint16_t analogout_read_u16(dac_t *obj) |
lypinator | 0:bb348c97df44 | 75 | { |
lypinator | 0:bb348c97df44 | 76 | uint32_t value = dac_read(obj); |
lypinator | 0:bb348c97df44 | 77 | return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits |
lypinator | 0:bb348c97df44 | 78 | } |
lypinator | 0:bb348c97df44 | 79 | |
lypinator | 0:bb348c97df44 | 80 | #endif // DEVICE_ANALOGOUT |