52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
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/*
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Copyright (c) 2012-2015 Ben Croston
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do
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so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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int setup(void);
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void setup_gpio(int gpio, int direction, int pud);
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int gpio_function(int gpio);
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void output_gpio(int gpio, int value);
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int input_gpio(int gpio);
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void set_rising_event(int gpio, int enable);
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void set_falling_event(int gpio, int enable);
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void set_high_event(int gpio, int enable);
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void set_low_event(int gpio, int enable);
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int eventdetected(int gpio);
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void cleanup(void);
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#define SETUP_OK 0
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#define SETUP_DEVMEM_FAIL 1
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#define SETUP_MALLOC_FAIL 2
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#define SETUP_MMAP_FAIL 3
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#define SETUP_CPUINFO_FAIL 4
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#define SETUP_NOT_RPI_FAIL 5
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#define INPUT 1 // is really 0 for control register!
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#define OUTPUT 0 // is really 1 for control register!
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#define ALT0 4
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#define HIGH 1
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#define LOW 0
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#define PUD_OFF 0
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#define PUD_UP 1
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#define PUD_DOWN 2
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