1 |
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2 | /** \addtogroup hal */
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3 | /** @{*/
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4 | /* mbed Microcontroller Library
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5 | * Copyright (c) 2006-2013 ARM Limited
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6 | *
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7 | * Licensed under the Apache License, Version 2.0 (the "License");
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8 | * you may not use this file except in compliance with the License.
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9 | * You may obtain a copy of the License at
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10 | *
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11 | * http://www.apache.org/licenses/LICENSE-2.0
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12 | *
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13 | * Unless required by applicable law or agreed to in writing, software
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14 | * distributed under the License is distributed on an "AS IS" BASIS,
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15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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16 | * See the License for the specific language governing permissions and
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17 | * limitations under the License.
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18 | */
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19 | #ifndef MBED_ANALOGOUT_API_H
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20 | #define MBED_ANALOGOUT_API_H
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21 |
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22 | #include "device.h"
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23 |
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24 | #if DEVICE_ANALOGOUT
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25 |
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26 | #ifdef __cplusplus
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27 | extern "C" {
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28 | #endif
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29 |
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30 | /** Analogout hal structure. dac_s is declared in the target's hal
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31 | */
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32 | typedef struct dac_s dac_t;
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33 |
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34 | /**
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35 | * \defgroup hal_analogout Analogout hal functions
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36 | * @{
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37 | */
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38 |
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39 | /** Initialize the analogout peripheral
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40 | *
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41 | * Configures the pin used by analogout.
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42 | * @param obj The analogout object to initialize
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43 | * @param pin The analogout pin name
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44 | */
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45 | void analogout_init(dac_t *obj, PinName pin);
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46 |
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47 | /** Release the analogout object
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48 | *
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49 | * Note: This is not currently used in the mbed-drivers
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50 | * @param obj The analogout object
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51 | */
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52 | void analogout_free(dac_t *obj);
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53 |
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54 | /** Set the output voltage, specified as a percentage (float)
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55 | *
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56 | * @param obj The analogin object
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57 | * @param value The floating-point output voltage to be set
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58 | */
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59 | void analogout_write(dac_t *obj, float value);
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60 |
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61 | /** Set the output voltage, specified as unsigned 16-bit
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62 | *
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63 | * @param obj The analogin object
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64 | * @param value The unsigned 16-bit output voltage to be set
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65 | */
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66 | void analogout_write_u16(dac_t *obj, uint16_t value);
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67 |
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68 | /** Read the current voltage value on the pin
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69 | *
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70 | * @param obj The analogin object
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71 | * @return A floating-point value representing the current voltage on the pin,
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72 | * measured as a percentage
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73 | */
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74 | float analogout_read(dac_t *obj);
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75 |
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76 | /** Read the current voltage value on the pin, as a normalized unsigned 16bit value
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77 | *
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78 | * @param obj The analogin object
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79 | * @return An unsigned 16-bit value representing the current voltage on the pin
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80 | */
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81 | uint16_t analogout_read_u16(dac_t *obj);
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82 |
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83 | /**@}*/
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84 |
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85 | #ifdef __cplusplus
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86 | }
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87 | #endif
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88 |
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89 | #endif
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90 |
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91 | #endif
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92 |
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93 | /** @}*/
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