mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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ChibiOS 2.6.8, until I can figure out where to get it from git.
This commit is contained in:
Jared Boone
292
firmware/chibios/os/hal/platforms/AT91SAM7/pal_lld.h
Executable file
292
firmware/chibios/os/hal/platforms/AT91SAM7/pal_lld.h
Executable file
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/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file AT91SAM7/pal_lld.h
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* @brief AT91SAM7 PIO low level driver header.
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*
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* @addtogroup PAL
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* @{
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*/
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#ifndef _PAL_LLD_H_
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#define _PAL_LLD_H_
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#if HAL_USE_PAL || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Unsupported modes and specific modes */
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/*===========================================================================*/
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// AT91: Port direction
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#define AT91_PAL_DIR_MASK 0x03
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#define AT91_PAL_DIR_INPUT 0x00
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#define AT91_PAL_DIR_OUTPUT 0x01
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#define AT91_PAL_DIR_PERIPH_A 0x02
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#define AT91_PAL_DIR_PERIPH_B 0x03
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// AT91: Additional flags
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#define AT91_PAL_OUT_SET 0x04
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#define AT91_PAL_OUT_CLEAR 0x08
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#define AT91_PAL_PULLUP 0x10
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#define AT91_PAL_OPENDRAIN 0x20
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// Unsupported
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#undef PAL_MODE_INPUT_PULLDOWN
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// Redefine the standard io modes
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#undef PAL_MODE_RESET
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#undef PAL_MODE_UNCONNECTED
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#undef PAL_MODE_INPUT
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#undef PAL_MODE_INPUT_PULLUP
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#undef PAL_MODE_INPUT_ANALOG
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#undef PAL_MODE_OUTPUT_PUSHPULL
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#undef PAL_MODE_OUTPUT_OPENDRAIN
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#define PAL_MODE_RESET (AT91_PAL_DIR_INPUT|AT91_PAL_PULLUP)
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#define PAL_MODE_UNCONNECTED (AT91_PAL_DIR_OUTPUT|AT91_PAL_OUT_SET)
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#define PAL_MODE_INPUT (AT91_PAL_DIR_INPUT)
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#define PAL_MODE_INPUT_PULLUP (AT91_PAL_DIR_INPUT|AT91_PAL_PULLUP)
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#define PAL_MODE_INPUT_ANALOG (AT91_PAL_DIR_INPUT)
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#define PAL_MODE_OUTPUT_PUSHPULL (AT91_PAL_DIR_OUTPUT)
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#define PAL_MODE_OUTPUT_OPENDRAIN (AT91_PAL_DIR_OUTPUT|AT91_PAL_PULLUP|AT91_PAL_OPENDRAIN)
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// Add the AT91 specific ones
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#define PAL_MODE_PERIPH_A_PUSHPULL (AT91_PAL_DIR_PERIPH_A)
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#define PAL_MODE_PERIPH_A_OPENDRAIN (AT91_PAL_DIR_PERIPH_A|AT91_PAL_PULLUP|AT91_PAL_OPENDRAIN)
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#define PAL_MODE_PERIPH_B_PUSHPULL (AT91_PAL_DIR_PERIPH_A)
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#define PAL_MODE_PERIPH_B_OPENDRAIN (AT91_PAL_DIR_PERIPH_A|AT91_PAL_PULLUP|AT91_PAL_OPENDRAIN)
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/*===========================================================================*/
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/* I/O Ports Types and constants. */
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/*===========================================================================*/
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/**
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* @brief PIO port setup info.
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*/
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typedef struct {
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/** Initial value for ODSR register (data).*/
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uint32_t odsr;
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/** Initial value for OSR register (direction).*/
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uint32_t osr;
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/** Initial value for PUSR register (Pull-ups).*/
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uint32_t pusr;
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} at91sam7_pio_setup_t;
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/**
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* @brief AT91SAM7 PIO static initializer.
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* @details An instance of this structure must be passed to @p palInit() at
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* system startup time in order to initialize the digital I/O
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* subsystem. This represents only the initial setup, specific pads
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* or whole ports can be reprogrammed at later time.
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*/
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typedef struct {
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/** @brief Port 0 setup data.*/
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at91sam7_pio_setup_t P0Data;
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#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
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(SAM7_PLATFORM == SAM7X512) || (SAM7_PLATFORM == SAM7A3) || \
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defined(__DOXYGEN__)
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/** @brief Port 1 setup data.*/
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at91sam7_pio_setup_t P1Data;
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#endif
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} PALConfig;
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/**
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* @brief Width, in bits, of an I/O port.
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*/
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#define PAL_IOPORTS_WIDTH 32
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/**
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* @brief Whole port mask.
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* @details This macro specifies all the valid bits into a port.
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*/
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#define PAL_WHOLE_PORT ((ioportmask_t)0xFFFFFFFF)
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/**
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* @brief Digital I/O port sized unsigned type.
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*/
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typedef uint32_t ioportmask_t;
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/**
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* @brief Digital I/O modes.
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*/
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typedef uint32_t iomode_t;
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/**
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* @brief Port Identifier.
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* @details This type can be a scalar or some kind of pointer, do not make
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* any assumption about it, use the provided macros when populating
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* variables of this type.
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*/
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typedef AT91PS_PIO ioportid_t;
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/*===========================================================================*/
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/* I/O Ports Identifiers. */
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/*===========================================================================*/
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/**
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* @brief PIO port A identifier.
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*/
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#define IOPORT1 AT91C_BASE_PIOA
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/**
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* @brief PIO port B identifier.
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*/
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#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
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(SAM7_PLATFORM == SAM7X512) || (SAM7_PLATFORM == SAM7A3) || \
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defined(__DOXYGEN__)
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#define IOPORT2 AT91C_BASE_PIOB
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#endif
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/*===========================================================================*/
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/* Implementation, some of the following macros could be implemented as */
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/* functions, if so please put them in pal_lld.c. */
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/*===========================================================================*/
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/**
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* @brief Low level PAL subsystem initialization.
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*
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* @param[in] config architecture-dependent ports configuration
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*
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* @notapi
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*/
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#define pal_lld_init(config) _pal_lld_init(config)
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/**
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* @brief Reads the physical I/O port states.
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* @details This function is implemented by reading the PIO_PDSR register, the
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* implementation has no side effects.
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*
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* @param[in] port port identifier
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* @return The port bits.
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*
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* @notapi
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*/
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#define pal_lld_readport(port) ((port)->PIO_PDSR)
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/**
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* @brief Reads the output latch.
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* @details This function is implemented by reading the PIO_ODSR register, the
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* implementation has no side effects.
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*
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* @param[in] port port identifier
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* @return The latched logical states.
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*
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* @notapi
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*/
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#define pal_lld_readlatch(port) ((port)->PIO_ODSR)
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/**
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* @brief Writes a bits mask on a I/O port.
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* @details This function is implemented by writing the PIO_ODSR register, the
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* implementation has no side effects.
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*
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* @param[in] port the port identifier
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* @param[in] bits the bits to be written on the specified port
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*
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* @notapi
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*/
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#define pal_lld_writeport(port, bits) ((port)->PIO_ODSR = (bits))
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/**
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* @brief Sets a bits mask on a I/O port.
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* @details This function is implemented by writing the PIO_SODR register, the
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* implementation has no side effects.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be ORed on the specified port
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*
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* @notapi
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*/
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#define pal_lld_setport(port, bits) ((port)->PIO_SODR = (bits))
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/**
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* @brief Clears a bits mask on a I/O port.
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* @details This function is implemented by writing the PIO_CODR register, the
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* implementation has no side effects.
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*
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* @param[in] port port identifier
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* @param[in] bits bits to be cleared on the specified port
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*
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* @notapi
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*/
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#define pal_lld_clearport(port, bits) ((port)->PIO_CODR = (bits))
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/**
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* @brief Writes a group of bits.
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* @details This function is implemented by writing the PIO_OWER, PIO_ODSR and
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* PIO_OWDR registers, the implementation is not atomic because the
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* multiple accesses.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset the group bit offset within the port
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* @param[in] bits bits to be written. Values exceeding the group
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* width are masked.
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*
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* @notapi
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*/
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#define pal_lld_writegroup(port, mask, offset, bits) \
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((port)->PIO_OWER = (mask) << (offset), \
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(port)->PIO_ODSR = (bits) << (offset), \
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(port)->PIO_OWDR = (mask) << (offset))
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/**
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* @brief Pads group mode setup.
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* @details This function programs a pads group belonging to the same port
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* with the specified mode.
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* @note @p PAL_MODE_UNCONNECTED is implemented as push pull output with
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* high state.
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*
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* @param[in] port port identifier
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* @param[in] mask group mask
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* @param[in] offset group bit offset within the port
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* @param[in] mode group mode
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*
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* @notapi
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*/
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#define pal_lld_setgroupmode(port, mask, offset, mode) \
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_pal_lld_setgroupmode(port, mask << offset, mode)
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/**
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* @brief Writes a logical state on an output pad.
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*
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* @param[in] port port identifier
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* @param[in] pad pad number within the port
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* @param[in] bit logical value, the value must be @p PAL_LOW or
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* @p PAL_HIGH
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*
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* @notapi
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*/
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#define pal_lld_writepad(port, pad, bit) pal_lld_writegroup(port, 1, pad, bit)
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extern const PALConfig pal_default_config;
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#ifdef __cplusplus
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extern "C" {
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#endif
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void _pal_lld_init(const PALConfig *config);
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void _pal_lld_setgroupmode(ioportid_t port,
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ioportmask_t mask,
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iomode_t mode);
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#ifdef __cplusplus
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}
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#endif
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#endif /* HAL_USE_PAL */
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#endif /* _PAL_LLD_H_ */
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/** @} */
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