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contiki/lib/include/gpio.h

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add attribution and license headers to source files. TODO item about start.S and printf.c
2010-05-08 17:03:36 +00:00
/*
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
* to the MC1322x project (http://mc1322x.devl.org)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of libmc1322x: see http://mc1322x.devl.org
* for details.
*
* $Id$
*/
led and gpio cleanup
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#ifndef GPIO_H
#define GPIO_H
Add structure-based GPIO register definitions
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/* Structure-based GPIO access
Example usage:
Register definitions: get rid of some macro magic that doesn't help much Instead of e.g. GPIO.DATA.GPIO_08, you now use GPIO->DATA.GPIO_08.
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GPIO->FUNC_SEL0 |= 0x00008000; // set a whole register
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Register definitions: get rid of some macro magic that doesn't help much Instead of e.g. GPIO.DATA.GPIO_08, you now use GPIO->DATA.GPIO_08.
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GPIO->FUNC_SEL_08 = 2; // set just one pin
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#define MY_PIN GPIO_08
Register definitions: get rid of some macro magic that doesn't help much Instead of e.g. GPIO.DATA.GPIO_08, you now use GPIO->DATA.GPIO_08.
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GPIO->FUNC_SEL.MY_PIN = 2; // same, to allow #define for pin names
GPIO->DATA.MY_PIN = 1;
Add gpio_set and gpio_reset Use them like gpio_set(GPIO_xx) and gpio_reset(GPIO_xx). These macros efficiently set the DATA_SET and DATA_RESET bits without reading the registers first, as a direct GPIO->DATA_SET.GPIO_xx would do
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gpio_set(GPIO_08); // efficiently set or clear a single output bit
gpio_reset(GPIO_08);
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*/
#define _V(x,n,i) uint32_t x##_##i : n;
#define _REP(x,n) \
_V(x,n,00) _V(x,n,01) _V(x,n,02) _V(x,n,03) _V(x,n,04) _V(x,n,05) _V(x,n,06) _V(x,n,07) \
_V(x,n,08) _V(x,n,09) _V(x,n,10) _V(x,n,11) _V(x,n,12) _V(x,n,13) _V(x,n,14) _V(x,n,15) \
_V(x,n,16) _V(x,n,17) _V(x,n,18) _V(x,n,19) _V(x,n,20) _V(x,n,21) _V(x,n,22) _V(x,n,23) \
_V(x,n,24) _V(x,n,25) _V(x,n,26) _V(x,n,27) _V(x,n,28) _V(x,n,29) _V(x,n,30) _V(x,n,31) \
_V(x,n,32) _V(x,n,33) _V(x,n,34) _V(x,n,35) _V(x,n,36) _V(x,n,37) _V(x,n,38) _V(x,n,39) \
_V(x,n,40) _V(x,n,41) _V(x,n,42) _V(x,n,43) _V(x,n,44) _V(x,n,45) _V(x,n,46) _V(x,n,47) \
_V(x,n,48) _V(x,n,49) _V(x,n,50) _V(x,n,51) _V(x,n,52) _V(x,n,53) _V(x,n,54) _V(x,n,55) \
_V(x,n,56) _V(x,n,57) _V(x,n,58) _V(x,n,59) _V(x,n,60) _V(x,n,61) _V(x,n,62) _V(x,n,63)
struct GPIO_struct {
#define _IO(x) \
union { struct { uint32_t x##0; uint32_t x##1; }; \
struct { _REP(x, 1) }; \
Name the GPIO structure so we can set multiple bits at once
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struct GPIO_##x { _REP(GPIO, 1) } x; };
Add structure-based GPIO register definitions
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#define _IO_2bit(x) \
union { struct { uint32_t x##0; uint32_t x##1; uint32_t x##2; uint32_t x##3; }; \
struct { _REP(x, 2) }; \
Name the GPIO structure so we can set multiple bits at once
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struct GPIO_##x { _REP(GPIO, 2) } x; };
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_IO(PAD_DIR);
_IO(DATA);
_IO(PAD_PU_EN);
_IO_2bit(FUNC_SEL);
_IO(DATA_SEL);
_IO(PAD_PU_SEL);
_IO(PAD_HYST_EN);
_IO(PAD_KEEP);
_IO(DATA_SET);
_IO(DATA_RESET);
_IO(PAD_DIR_SET);
_IO(PAD_DIR_RESET);
};
#undef _IO
#undef _IO_2bit
Add gpio_set and gpio_reset Use them like gpio_set(GPIO_xx) and gpio_reset(GPIO_xx). These macros efficiently set the DATA_SET and DATA_RESET bits without reading the registers first, as a direct GPIO->DATA_SET.GPIO_xx would do
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/* Build an enum lookup to map GPIO_08 -> 8 */
#undef _V
#define _V(x,n,i) __NUM_GPIO_GPIO_##i,
enum { _REP(0,0) };
/* Macros to set or reset a data pin in the fastest possible way */
#define gpio_set(gpio_xx) __gpio_set(gpio_xx)
#define __gpio_set(gpio_xx) \
((__NUM_GPIO_##gpio_xx < 32) \
? (GPIO->DATA_SET0 = (1 << (__NUM_GPIO_##gpio_xx - 0))) \
: (GPIO->DATA_SET1 = (1 << (__NUM_GPIO_##gpio_xx - 32))))
#define gpio_reset(gpio_xx) __gpio_reset(gpio_xx)
#define __gpio_reset(gpio_xx) \
((__NUM_GPIO_##gpio_xx < 32) \
? (GPIO->DATA_RESET0 = (1 << (__NUM_GPIO_##gpio_xx - 0))) \
: (GPIO->DATA_RESET1 = (1 << (__NUM_GPIO_##gpio_xx - 32))))
Add structure-based GPIO register definitions
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#undef _REP
#undef _V
Register definitions: get rid of some macro magic that doesn't help much Instead of e.g. GPIO.DATA.GPIO_08, you now use GPIO->DATA.GPIO_08.
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static volatile struct GPIO_struct * const GPIO = (void *) (0x80000000);
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/* Old register definitions, for compatibility */
#ifndef REG_NO_COMPAT
led and gpio cleanup
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#define GPIO_PAD_DIR0 ((volatile uint32_t *) 0x80000000)
finish blink tests
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#define GPIO_PAD_DIR1 ((volatile uint32_t *) 0x80000004)
led and gpio cleanup
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#define GPIO_DATA0 ((volatile uint32_t *) 0x80000008)
finish blink tests
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#define GPIO_DATA1 ((volatile uint32_t *) 0x8000000c)
led and gpio cleanup
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#define GPIO_PAD_PU_EN0 ((volatile uint32_t *) 0x80000010)
#define GPIO_PAD_PU_EN1 ((volatile uint32_t *) 0x80000014)
finish blink tests
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#define GPIO_FUNC_SEL0 ((volatile uint32_t *) 0x80000018) /* GPIO 15 - 0; 2 bit blocks */
#define GPIO_FUNC_SEL1 ((volatile uint32_t *) 0x8000001c) /* GPIO 16 - 31; 2 bit blocks */
#define GPIO_FUNC_SEL2 ((volatile uint32_t *) 0x80000020) /* GPIO 32 - 47; 2 bit blocks */
#define GPIO_FUNC_SEL3 ((volatile uint32_t *) 0x80000024) /* GPIO 48 - 63; 2 bit blocks */
#define GPIO_DATA_SEL0 ((volatile uint32_t *) 0x80000028)
#define GPIO_DATA_SEL1 ((volatile uint32_t *) 0x8000002c)
#define GPIO_PAD_PU_SEL0 ((volatile uint32_t *) 0x80000030)
#define GPIO_PAD_PU_SEL1 ((volatile uint32_t *) 0x80000034)
add dir set and reset
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#define GPIO_DATA_SET0 ((volatile uint32_t *) 0x80000048)
#define GPIO_DATA_SET1 ((volatile uint32_t *) 0x8000004c)
#define GPIO_DATA_RESET0 ((volatile uint32_t *) 0x80000050)
#define GPIO_DATA_RESET1 ((volatile uint32_t *) 0x80000054)
#define GPIO_PAD_DIR_SET0 ((volatile uint32_t *) 0x80000058)
#define GPIO_PAD_DIR_SET1 ((volatile uint32_t *) 0x8000005c)
#define GPIO_PAD_DIR_RESET0 ((volatile uint32_t *) 0x80000060)
#define GPIO_PAD_DIR_RESET1 ((volatile uint32_t *) 0x80000064)
LEDs now indicate bit position (instead of (1 << pos)) which is more consistent with how everything else works
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these gpio routines should be volatile
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inline void gpio_pad_dir(volatile uint64_t data);
inline void gpio_data(volatile uint64_t data);
pulled in gpio_data_get from the quahogcon guys.
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inline uint64_t gpio_data_get(volatile uint64_t bits);
these gpio routines should be volatile
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inline void gpio_pad_pu_en(volatile uint64_t data);
inline void gpio_data_sel(volatile uint64_t data);
inline void gpio_data_pu_sel(volatile uint64_t data);
inline void gpio_data_set(volatile uint64_t data);
inline void gpio_data_reset(volatile uint64_t data);
inline void gpio_pad_dir_set(volatile uint64_t data);
inline void gpio_pad_dir_reset(volatile uint64_t data);
led and gpio cleanup
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/* select pullup or pulldown for GPIO 0-31 (b=0-31) */
remove some reg32 in gpio.h
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#define gpio_sel0_pullup(b) (set_bit(*GPIO_PAD_PU_SEL0,b))
#define gpio_sel0_pulldown(b) (clear_bit(*GPIO_PAD_PU_SEL0,b))
led and gpio cleanup
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/* select pullup or pulldown for GPIO 32-63 (b=32-63) */
remove some reg32 in gpio.h
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#define gpio_sel1_pullup(b) (set_bit(*GPIO_PAD_PU_SEL1,b-32))
#define gpio_sel1_pulldown(b) (clear_bit(*GPIO_PAD_PU_SEL1,b-32))
led and gpio cleanup
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/* enable/disable pullup for GPIO 0-31 (b=0-31) */
remove some reg32 in gpio.h
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#define gpio_pu0_enable(b) (set_bit(*GPIO_PAD_PU_EN0,b))
#define gpio_pu0_disable(b) (clear_bit(*GPIO_PAD_PU_EN0,b))
led and gpio cleanup
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/* enable/disable pullup for GPIO 32-63 (b=32-63) */
remove some reg32 in gpio.h
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#define gpio_pu1_enable(b) (set_bit(*GPIO_PAD_PU_EN1,b-32))
#define gpio_pu1_disable(b) (clear_bit(*GPIO_PAD_PU_EN1,b-32))
led and gpio cleanup
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Add structure-based GPIO register definitions
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#endif /* REG_NO_COMPAT */
led and gpio cleanup
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#endif
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