| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include "hal/hal_gpio.h" |
| |
| #include <stdio.h> |
| |
| #define HAL_GPIO_NUM_PINS 8 |
| |
| static struct { |
| int val; |
| enum { |
| INPUT, |
| OUTPUT |
| } dir; |
| } hal_gpio[HAL_GPIO_NUM_PINS]; |
| |
| int |
| hal_gpio_init_in(int pin, hal_gpio_pull_t pull) |
| { |
| if (pin >= HAL_GPIO_NUM_PINS) { |
| return -1; |
| } |
| hal_gpio[pin].dir = INPUT; |
| switch (pull) { |
| case HAL_GPIO_PULL_UP: |
| hal_gpio[pin].val = 1; |
| break; |
| default: |
| hal_gpio[pin].val = 0; |
| break; |
| } |
| return 0; |
| } |
| |
| int |
| hal_gpio_init_out(int pin, int val) |
| { |
| if (pin >= HAL_GPIO_NUM_PINS) { |
| return -1; |
| } |
| hal_gpio[pin].dir = OUTPUT; |
| hal_gpio_write(pin,val); |
| return 0; |
| } |
| |
| void hal_gpio_write(int pin, int val) |
| { |
| if (pin >= HAL_GPIO_NUM_PINS) { |
| return; |
| } |
| if (hal_gpio[pin].dir != OUTPUT) { |
| return; |
| } |
| hal_gpio[pin].val = (val != 0); |
| printf("hal_gpio set pin %2d to %1d\r", pin, hal_gpio[pin].val); |
| fflush(stdout); |
| } |
| |
| int |
| hal_gpio_read(int pin) |
| { |
| if (pin >= HAL_GPIO_NUM_PINS) { |
| return -1; |
| } |
| return hal_gpio[pin].val; |
| } |
| |
| int |
| hal_gpio_toggle(int pin) |
| { |
| int pin_state = (hal_gpio_read(pin) != 1); |
| hal_gpio_write(pin, pin_state); |
| return pin_state; |
| } |