mirror of
git://projects.qi-hardware.com/wernermisc.git
synced 2024-11-28 21:05:00 +02:00
81 lines
1.5 KiB
C
81 lines
1.5 KiB
C
|
/*
|
||
|
|
* gpio-xburst.h - Really primitive XBurst GPIO access
|
||
|
|
*
|
||
|
|
* Written 2010 by Werner Almesberger
|
||
|
|
* Copyright 2010 Werner Almesberger
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Ports are numbered 0 = A, 1 = B, ...
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef GPIO_XBURST_H
|
||
|
|
#define GPIO_XBURST_H
|
||
|
|
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
|
||
|
|
volatile void *mem;
|
||
|
|
|
||
|
|
|
||
|
|
#define REG(off) (*(volatile uint32_t *) (mem+(off)))
|
||
|
|
|
||
|
|
#define port_pin(port) REG(port*0x100)
|
||
|
|
#define port_dats(port) REG(port*0x100+0x14)
|
||
|
|
#define port_datc(port) REG(port*0x100+0x18)
|
||
|
|
#define port_func(port) REG(port*0x100+0x48)
|
||
|
|
#define port_dirs(port) REG(port*0x100+0x64)
|
||
|
|
#define port_dirc(port) REG(port*0x100+0x68)
|
||
|
|
|
||
|
|
|
||
|
|
static inline void gpio_high(unsigned port, unsigned bit)
|
||
|
|
{
|
||
|
|
port_dats(port) = 1 << bit;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static inline void gpio_low(unsigned port, unsigned bit)
|
||
|
|
{
|
||
|
|
port_datc(port) = 1 << bit;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static inline void gpio_set(unsigned port, unsigned bit, int value)
|
||
|
|
{
|
||
|
|
if (value)
|
||
|
|
gpio_high(port, bit);
|
||
|
|
else
|
||
|
|
gpio_low(port, bit);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static inline int gpio_get(unsigned port, unsigned bit)
|
||
|
|
{
|
||
|
|
return (port_pin(port) >> bit) & 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static inline void gpio_output(unsigned port, unsigned bit)
|
||
|
|
{
|
||
|
|
port_dirs(port) = 1 << bit;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static inline void gpio_input(unsigned port, unsigned bit)
|
||
|
|
{
|
||
|
|
port_dirc(port) = 1 << bit;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void gpio_init(void);
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* !GPIO_XBURST_H */
|