mirror of
git://projects.qi-hardware.com/f32xbase.git
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3c9abdc65a
- f32x/Makefile (OBJS_om): rename gpio.o to gpio-s3c24xx.o - f32x/gpio-s3c24xx.h, f32x/gpio-s3c24xx.c, f32x/c2-om.c: renamed gpio.* to gpio-s3c24xx.* to
75 lines
1.3 KiB
C
75 lines
1.3 KiB
C
/*
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* f32x/gpio-s3c24xx.h - Really primitive S3C244x GPIO access. Ports B-H only.
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*
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* Written 2008 by Werner Almesberger
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* Copyright 2008 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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/*
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* Ports are numbered 0 = A, 1 = B, ...
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*/
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#ifndef GPIO_S3C24XX_H
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#define GPIO_S3C24XX_H
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#include <stdint.h>
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volatile uint32_t *mem;
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#define port_dat(port) mem[port*4+1]
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#define port_con(port) mem[port*4]
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static inline void gpio_high(unsigned port, unsigned bit)
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{
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port_dat(port) |= 1 << bit;
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}
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static inline void gpio_low(unsigned port, unsigned bit)
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{
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port_dat(port) &= ~(1 << bit);
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}
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static inline void gpio_set(unsigned port, unsigned bit, int value)
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{
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if (value)
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gpio_high(port, bit);
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else
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gpio_low(port, bit);
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}
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static inline int gpio_get(unsigned port, unsigned bit)
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{
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return (port_dat(port) >> bit) & 1;
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}
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static inline void gpio_output(unsigned port, unsigned bit)
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{
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port_con(port) = (port_con(port) & ~(3 << bit*2)) | (1 << bit*2);
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}
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static inline void gpio_input(unsigned port, unsigned bit)
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{
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port_con(port) &= ~(3 << bit*2);
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}
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void gpio_init(void);
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#endif /* !GPIO_S3C24XX_H */
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