1 | /* mbed Microcontroller Library
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2 | * Copyright (c) 2006-2013 ARM Limited
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3 | *
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4 | * Licensed under the Apache License, Version 2.0 (the "License");
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5 | * you may not use this file except in compliance with the License.
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6 | * You may obtain a copy of the License at
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7 | *
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8 | * http://www.apache.org/licenses/LICENSE-2.0
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9 | *
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10 | * Unless required by applicable law or agreed to in writing, software
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11 | * distributed under the License is distributed on an "AS IS" BASIS,
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12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 | * See the License for the specific language governing permissions and
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14 | * limitations under the License.
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15 | */
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16 | #include "hal/gpio_api.h"
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17 |
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18 | static inline void _gpio_init_in(gpio_t* gpio, PinName pin, PinMode mode)
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19 | {
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20 | gpio_init(gpio, pin);
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21 | if (pin != NC) {
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22 | gpio_dir(gpio, PIN_INPUT);
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23 | gpio_mode(gpio, mode);
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24 | }
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25 | }
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26 |
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27 | static inline void _gpio_init_out(gpio_t* gpio, PinName pin, PinMode mode, int value)
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28 | {
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29 | gpio_init(gpio, pin);
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30 | if (pin != NC) {
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31 | gpio_write(gpio, value);
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32 | gpio_dir(gpio, PIN_OUTPUT);
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33 | gpio_mode(gpio, mode);
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34 | }
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35 | }
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36 |
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37 | void gpio_init_in(gpio_t* gpio, PinName pin) {
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38 | gpio_init_in_ex(gpio, pin, PullDefault);
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39 | }
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40 |
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41 | void gpio_init_in_ex(gpio_t* gpio, PinName pin, PinMode mode) {
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42 | _gpio_init_in(gpio, pin, mode);
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43 | }
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44 |
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45 | void gpio_init_out(gpio_t* gpio, PinName pin) {
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46 | gpio_init_out_ex(gpio, pin, 0);
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47 | }
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48 |
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49 | void gpio_init_out_ex(gpio_t* gpio, PinName pin, int value) {
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50 | _gpio_init_out(gpio, pin, PullNone, value);
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51 | }
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52 |
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53 | void gpio_init_inout(gpio_t* gpio, PinName pin, PinDirection direction, PinMode mode, int value) {
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54 | if (direction == PIN_INPUT) {
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55 | _gpio_init_in(gpio, pin, mode);
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56 | if (pin != NC)
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57 | gpio_write(gpio, value); // we prepare the value in case it is switched later
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58 | } else {
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59 | _gpio_init_out(gpio, pin, mode, value);
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60 | }
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61 | }
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