forked from forks/qmk_firmware
382 lines
13 KiB
C
382 lines
13 KiB
C
|
/*
|
||
|
|
LUFA Library
|
||
|
|
Copyright (C) Dean Camera, 2012.
|
||
|
|
|
||
|
|
dean [at] fourwalledcubicle [dot] com
|
||
|
|
www.lufa-lib.org
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
||
|
|
|
||
|
|
Permission to use, copy, modify, distribute, and sell this
|
||
|
|
software and its documentation for any purpose is hereby granted
|
||
|
|
without fee, provided that the above copyright notice appear in
|
||
|
|
all copies and that both that the copyright notice and this
|
||
|
|
permission notice and warranty disclaimer appear in supporting
|
||
|
|
documentation, and that the name of the author not be used in
|
||
|
|
advertising or publicity pertaining to distribution of the
|
||
|
|
software without specific, written prior permission.
|
||
|
|
|
||
|
|
The author disclaim all warranties with regard to this
|
||
|
|
software, including all implied warranties of merchantability
|
||
|
|
and fitness. In no event shall the author be liable for any
|
||
|
|
special, indirect or consequential damages or any damages
|
||
|
|
whatsoever resulting from loss of use, data or profits, whether
|
||
|
|
in an action of contract, negligence or other tortious action,
|
||
|
|
arising out of or in connection with the use or performance of
|
||
|
|
this software.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** \dir
|
||
|
|
* \brief Common library header files.
|
||
|
|
*
|
||
|
|
* This folder contains header files which are common to all parts of the LUFA library. They may be used freely in
|
||
|
|
* user applications.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** \file
|
||
|
|
* \brief Common library convenience headers, macros and functions.
|
||
|
|
*
|
||
|
|
* \copydetails Group_Common
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** \defgroup Group_Common Common Utility Headers - LUFA/Drivers/Common/Common.h
|
||
|
|
* \brief Common library convenience headers, macros and functions.
|
||
|
|
*
|
||
|
|
* Common utility headers containing macros, functions, enums and types which are common to all
|
||
|
|
* aspects of the library.
|
||
|
|
*
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** \defgroup Group_GlobalInt Global Interrupt Macros
|
||
|
|
* \brief Convenience macros for the management of interrupts globally within the device.
|
||
|
|
*
|
||
|
|
* Macros and functions to create and control global interrupts within the device.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __LUFA_COMMON_H__
|
||
|
|
#define __LUFA_COMMON_H__
|
||
|
|
|
||
|
|
/* Macros: */
|
||
|
|
#define __INCLUDE_FROM_COMMON_H
|
||
|
|
|
||
|
|
/* Includes: */
|
||
|
|
#include <stdint.h>
|
||
|
|
#include <stdbool.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#include "Architectures.h"
|
||
|
|
#include "BoardTypes.h"
|
||
|
|
#include "ArchitectureSpecific.h"
|
||
|
|
#include "CompilerSpecific.h"
|
||
|
|
#include "Attributes.h"
|
||
|
|
|
||
|
|
#if defined(USE_LUFA_CONFIG_HEADER)
|
||
|
|
#include "LUFAConfig.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Enable C linkage for C++ Compilers: */
|
||
|
|
#if defined(__cplusplus)
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Architecture specific utility includes: */
|
||
|
|
#if defined(__DOXYGEN__)
|
||
|
|
/** Type define for an unsigned integer the same width as the selected architecture's machine register.
|
||
|
|
* This is distinct from the non-specific standard int data type, whose width is machine dependant but
|
||
|
|
* which may not reflect the actual machine register width on some targets (e.g. AVR8).
|
||
|
|
*/
|
||
|
|
typedef MACHINE_REG_t uint_reg_t;
|
||
|
|
#elif (ARCH == ARCH_AVR8)
|
||
|
|
#include <avr/io.h>
|
||
|
|
#include <avr/interrupt.h>
|
||
|
|
#include <avr/pgmspace.h>
|
||
|
|
#include <avr/eeprom.h>
|
||
|
|
#include <avr/boot.h>
|
||
|
|
#include <math.h>
|
||
|
|
#include <util/delay.h>
|
||
|
|
|
||
|
|
typedef uint8_t uint_reg_t;
|
||
|
|
|
||
|
|
#define ARCH_HAS_EEPROM_ADDRESS_SPACE
|
||
|
|
#define ARCH_HAS_FLASH_ADDRESS_SPACE
|
||
|
|
#define ARCH_HAS_MULTI_ADDRESS_SPACE
|
||
|
|
#define ARCH_LITTLE_ENDIAN
|
||
|
|
|
||
|
|
#include "Endianness.h"
|
||
|
|
#elif (ARCH == ARCH_UC3)
|
||
|
|
#include <avr32/io.h>
|
||
|
|
#include <math.h>
|
||
|
|
|
||
|
|
// === TODO: Find abstracted way to handle these ===
|
||
|
|
#define PROGMEM
|
||
|
|
#define pgm_read_byte(x) *x
|
||
|
|
#define memcmp_P(...) memcmp(__VA_ARGS__)
|
||
|
|
#define memcpy_P(...) memcpy(__VA_ARGS__)
|
||
|
|
// =================================================
|
||
|
|
|
||
|
|
typedef uint32_t uint_reg_t;
|
||
|
|
|
||
|
|
#define ARCH_BIG_ENDIAN
|
||
|
|
|
||
|
|
#include "Endianness.h"
|
||
|
|
#elif (ARCH == ARCH_XMEGA)
|
||
|
|
#include <avr/io.h>
|
||
|
|
#include <avr/interrupt.h>
|
||
|
|
#include <avr/pgmspace.h>
|
||
|
|
#include <avr/eeprom.h>
|
||
|
|
#include <math.h>
|
||
|
|
#include <util/delay.h>
|
||
|
|
|
||
|
|
typedef uint8_t uint_reg_t;
|
||
|
|
|
||
|
|
#define ARCH_HAS_EEPROM_ADDRESS_SPACE
|
||
|
|
#define ARCH_HAS_FLASH_ADDRESS_SPACE
|
||
|
|
#define ARCH_HAS_MULTI_ADDRESS_SPACE
|
||
|
|
#define ARCH_LITTLE_ENDIAN
|
||
|
|
|
||
|
|
#include "Endianness.h"
|
||
|
|
#else
|
||
|
|
#error Unknown device architecture specified.
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Public Interface - May be used in end-application: */
|
||
|
|
/* Macros: */
|
||
|
|
/** Macro for encasing other multi-statement macros. This should be used along with an opening brace
|
||
|
|
* before the start of any multi-statement macro, so that the macros contents as a whole are treated
|
||
|
|
* as a discrete block and not as a list of separate statements which may cause problems when used as
|
||
|
|
* a block (such as inline \c if statements).
|
||
|
|
*/
|
||
|
|
#define MACROS do
|
||
|
|
|
||
|
|
/** Macro for encasing other multi-statement macros. This should be used along with a preceding closing
|
||
|
|
* brace at the end of any multi-statement macro, so that the macros contents as a whole are treated
|
||
|
|
* as a discrete block and not as a list of separate statements which may cause problems when used as
|
||
|
|
* a block (such as inline \c if statements).
|
||
|
|
*/
|
||
|
|
#define MACROE while (0)
|
||
|
|
|
||
|
|
/** Convenience macro to determine the larger of two values.
|
||
|
|
*
|
||
|
|
* \attention This macro should only be used with operands that do not have side effects from being evaluated
|
||
|
|
* multiple times.
|
||
|
|
*
|
||
|
|
* \param[in] x First value to compare
|
||
|
|
* \param[in] y First value to compare
|
||
|
|
*
|
||
|
|
* \return The larger of the two input parameters
|
||
|
|
*/
|
||
|
|
#if !defined(MAX) || defined(__DOXYGEN__)
|
||
|
|
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/** Convenience macro to determine the smaller of two values.
|
||
|
|
*
|
||
|
|
* \attention This macro should only be used with operands that do not have side effects from being evaluated
|
||
|
|
* multiple times.
|
||
|
|
*
|
||
|
|
* \param[in] x First value to compare
|
||
|
|
* \param[in] y First value to compare
|
||
|
|
*
|
||
|
|
* \return The smaller of the two input parameters
|
||
|
|
*/
|
||
|
|
#if !defined(MIN) || defined(__DOXYGEN__)
|
||
|
|
#define MIN(x, y) (((x) < (y)) ? (x) : (y))
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if !defined(STRINGIFY) || defined(__DOXYGEN__)
|
||
|
|
/** Converts the given input into a string, via the C Preprocessor. This macro puts literal quotation
|
||
|
|
* marks around the input, converting the source into a string literal.
|
||
|
|
*
|
||
|
|
* \param[in] x Input to convert into a string literal.
|
||
|
|
*
|
||
|
|
* \return String version of the input.
|
||
|
|
*/
|
||
|
|
#define STRINGIFY(x) #x
|
||
|
|
|
||
|
|
/** Converts the given input into a string after macro expansion, via the C Preprocessor. This macro puts
|
||
|
|
* literal quotation marks around the expanded input, converting the source into a string literal.
|
||
|
|
*
|
||
|
|
* \param[in] x Input to expand and convert into a string literal.
|
||
|
|
*
|
||
|
|
* \return String version of the expanded input.
|
||
|
|
*/
|
||
|
|
#define STRINGIFY_EXPANDED(x) STRINGIFY(x)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if !defined(ISR) || defined(__DOXYGEN__)
|
||
|
|
/** Macro for the definition of interrupt service routines, so that the compiler can insert the required
|
||
|
|
* prologue and epilogue code to properly manage the interrupt routine without affecting the main thread's
|
||
|
|
* state with unintentional side-effects.
|
||
|
|
*
|
||
|
|
* Interrupt handlers written using this macro may still need to be registered with the microcontroller's
|
||
|
|
* Interrupt Controller (if present) before they will properly handle incoming interrupt events.
|
||
|
|
*
|
||
|
|
* \note This macro is only supplied on some architectures, where the standard library does not include a valid
|
||
|
|
* definition. If an existing definition exists, the alternative definition here will be ignored.
|
||
|
|
*
|
||
|
|
* \ingroup Group_GlobalInt
|
||
|
|
*
|
||
|
|
* \param[in] Name Unique name of the interrupt service routine.
|
||
|
|
*/
|
||
|
|
#define ISR(Name, ...) void Name (void) __attribute__((__interrupt__)) __VA_ARGS__; void Name (void)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Inline Functions: */
|
||
|
|
/** Function to reverse the individual bits in a byte - i.e. bit 7 is moved to bit 0, bit 6 to bit 1,
|
||
|
|
* etc.
|
||
|
|
*
|
||
|
|
* \param[in] Byte Byte of data whose bits are to be reversed.
|
||
|
|
*
|
||
|
|
* \return Input data with the individual bits reversed (mirrored).
|
||
|
|
*/
|
||
|
|
static inline uint8_t BitReverse(uint8_t Byte) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
|
||
|
|
static inline uint8_t BitReverse(uint8_t Byte)
|
||
|
|
{
|
||
|
|
Byte = (((Byte & 0xF0) >> 4) | ((Byte & 0x0F) << 4));
|
||
|
|
Byte = (((Byte & 0xCC) >> 2) | ((Byte & 0x33) << 2));
|
||
|
|
Byte = (((Byte & 0xAA) >> 1) | ((Byte & 0x55) << 1));
|
||
|
|
|
||
|
|
return Byte;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Function to perform a blocking delay for a specified number of milliseconds. The actual delay will be
|
||
|
|
* at a minimum the specified number of milliseconds, however due to loop overhead and internal calculations
|
||
|
|
* may be slightly higher.
|
||
|
|
*
|
||
|
|
* \param[in] Milliseconds Number of milliseconds to delay
|
||
|
|
*/
|
||
|
|
static inline void Delay_MS(uint16_t Milliseconds) ATTR_ALWAYS_INLINE;
|
||
|
|
static inline void Delay_MS(uint16_t Milliseconds)
|
||
|
|
{
|
||
|
|
#if (ARCH == ARCH_AVR8)
|
||
|
|
if (GCC_IS_COMPILE_CONST(Milliseconds))
|
||
|
|
{
|
||
|
|
_delay_ms(Milliseconds);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
while (Milliseconds--)
|
||
|
|
_delay_ms(1);
|
||
|
|
}
|
||
|
|
#elif (ARCH == ARCH_UC3)
|
||
|
|
while (Milliseconds--)
|
||
|
|
{
|
||
|
|
__builtin_mtsr(AVR32_COUNT, 0);
|
||
|
|
while ((uint32_t)__builtin_mfsr(AVR32_COUNT) < (F_CPU / 1000));
|
||
|
|
}
|
||
|
|
#elif (ARCH == ARCH_XMEGA)
|
||
|
|
if (GCC_IS_COMPILE_CONST(Milliseconds))
|
||
|
|
{
|
||
|
|
_delay_ms(Milliseconds);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
while (Milliseconds--)
|
||
|
|
_delay_ms(1);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Retrieves a mask which contains the current state of the global interrupts for the device. This
|
||
|
|
* value can be stored before altering the global interrupt enable state, before restoring the
|
||
|
|
* flag(s) back to their previous values after a critical section using \ref SetGlobalInterruptMask().
|
||
|
|
*
|
||
|
|
* \ingroup Group_GlobalInt
|
||
|
|
*
|
||
|
|
* \return Mask containing the current Global Interrupt Enable Mask bit(s).
|
||
|
|
*/
|
||
|
|
static inline uint_reg_t GetGlobalInterruptMask(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
|
||
|
|
static inline uint_reg_t GetGlobalInterruptMask(void)
|
||
|
|
{
|
||
|
|
GCC_MEMORY_BARRIER();
|
||
|
|
|
||
|
|
#if (ARCH == ARCH_AVR8)
|
||
|
|
return SREG;
|
||
|
|
#elif (ARCH == ARCH_UC3)
|
||
|
|
return __builtin_mfsr(AVR32_SR);
|
||
|
|
#elif (ARCH == ARCH_XMEGA)
|
||
|
|
return SREG;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Sets the global interrupt enable state of the microcontroller to the mask passed into the function.
|
||
|
|
* This can be combined with \ref GetGlobalInterruptMask() to save and restore the Global Interrupt Enable
|
||
|
|
* Mask bit(s) of the device after a critical section has completed.
|
||
|
|
*
|
||
|
|
* \ingroup Group_GlobalInt
|
||
|
|
*
|
||
|
|
* \param[in] GlobalIntState Global Interrupt Enable Mask value to use
|
||
|
|
*/
|
||
|
|
static inline void SetGlobalInterruptMask(const uint_reg_t GlobalIntState) ATTR_ALWAYS_INLINE;
|
||
|
|
static inline void SetGlobalInterruptMask(const uint_reg_t GlobalIntState)
|
||
|
|
{
|
||
|
|
GCC_MEMORY_BARRIER();
|
||
|
|
|
||
|
|
#if (ARCH == ARCH_AVR8)
|
||
|
|
SREG = GlobalIntState;
|
||
|
|
#elif (ARCH == ARCH_UC3)
|
||
|
|
if (GlobalIntState & AVR32_SR_GM)
|
||
|
|
__builtin_ssrf(AVR32_SR_GM_OFFSET);
|
||
|
|
else
|
||
|
|
__builtin_csrf(AVR32_SR_GM_OFFSET);
|
||
|
|
#elif (ARCH == ARCH_XMEGA)
|
||
|
|
SREG = GlobalIntState;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
GCC_MEMORY_BARRIER();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Enables global interrupt handling for the device, allowing interrupts to be handled.
|
||
|
|
*
|
||
|
|
* \ingroup Group_GlobalInt
|
||
|
|
*/
|
||
|
|
static inline void GlobalInterruptEnable(void) ATTR_ALWAYS_INLINE;
|
||
|
|
static inline void GlobalInterruptEnable(void)
|
||
|
|
{
|
||
|
|
GCC_MEMORY_BARRIER();
|
||
|
|
|
||
|
|
#if (ARCH == ARCH_AVR8)
|
||
|
|
sei();
|
||
|
|
#elif (ARCH == ARCH_UC3)
|
||
|
|
__builtin_csrf(AVR32_SR_GM_OFFSET);
|
||
|
|
#elif (ARCH == ARCH_XMEGA)
|
||
|
|
sei();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
GCC_MEMORY_BARRIER();
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Disabled global interrupt handling for the device, preventing interrupts from being handled.
|
||
|
|
*
|
||
|
|
* \ingroup Group_GlobalInt
|
||
|
|
*/
|
||
|
|
static inline void GlobalInterruptDisable(void) ATTR_ALWAYS_INLINE;
|
||
|
|
static inline void GlobalInterruptDisable(void)
|
||
|
|
{
|
||
|
|
GCC_MEMORY_BARRIER();
|
||
|
|
|
||
|
|
#if (ARCH == ARCH_AVR8)
|
||
|
|
cli();
|
||
|
|
#elif (ARCH == ARCH_UC3)
|
||
|
|
__builtin_ssrf(AVR32_SR_GM_OFFSET);
|
||
|
|
#elif (ARCH == ARCH_XMEGA)
|
||
|
|
cli();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
GCC_MEMORY_BARRIER();
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Disable C linkage for C++ Compilers: */
|
||
|
|
#if defined(__cplusplus)
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/** @} */
|
||
|
|
|