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tinySA/os/hal/platforms/SPC5xx/SIUL_v1/pal_lld.h

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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file SPC5xx/SIU_v1//pal_lld.h
* @brief SPC5xx SIU/SIUL low level driver header.
*
* @addtogroup PAL
* @{
*/
#ifndef _PAL_LLD_H_
#define _PAL_LLD_H_
#if HAL_USE_PAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Unsupported modes and specific modes */
/*===========================================================================*/
#undef PAL_MODE_RESET
#undef PAL_MODE_UNCONNECTED
#undef PAL_MODE_INPUT
#undef PAL_MODE_INPUT_PULLUP
#undef PAL_MODE_INPUT_PULLDOWN
#undef PAL_MODE_INPUT_ANALOG
#undef PAL_MODE_OUTPUT_PUSHPULL
#undef PAL_MODE_OUTPUT_OPENDRAIN
/**
* @name SIU/SIUL-specific PAL modes
* @{
*/
#define PAL_SPC5_SMC (1U << 14)
#define PAL_SPC5_APC (1U << 13)
#define PAL_SPC5_PA_MASK (3U << 10)
#define PAL_SPC5_PA(n) ((n) << 10)
#define PAL_SPC5_OBE (1U << 9)
#define PAL_SPC5_IBE (1U << 8)
#define PAL_SPC5_ODE (1U << 5)
#define PAL_SPC5_SRC (1U << 2)
#define PAL_SPC5_WPE (1U << 1)
#define PAL_SPC5_WPS (1U << 0)
/** @} */
/**
* @name Pads mode constants
* @{
*/
/**
* @brief After reset state.
*/
#define PAL_MODE_RESET 0
/**
* @brief Safe state for <b>unconnected</b> pads.
*/
#define PAL_MODE_UNCONNECTED (PAL_SPC5_WPE | PAL_SPC5_WPS)
/**
* @brief Regular input high-Z pad.
*/
#define PAL_MODE_INPUT (PAL_SPC5_IBE)
/**
* @brief Input pad with weak pull up resistor.
*/
#define PAL_MODE_INPUT_PULLUP (PAL_SPC5_IBE |PAL_SPC5_WPE | \
PAL_SPC5_WPS)
/**
* @brief Input pad with weak pull down resistor.
*/
#define PAL_MODE_INPUT_PULLDOWN (PAL_SPC5_IBE |PAL_SPC5_WPE)
/**
* @brief Analog input mode.
*/
#define PAL_MODE_INPUT_ANALOG PAL_SPC5_APC
/**
* @brief Push-pull output pad.
*/
#define PAL_MODE_OUTPUT_PUSHPULL (PAL_SPC5_IBE | PAL_SPC5_OBE)
/**
* @brief Open-drain output pad.
*/
#define PAL_MODE_OUTPUT_OPENDRAIN (PAL_SPC5_IBE | PAL_SPC5_OBE | \
PAL_SPC5_ODE)
/**
* @brief Alternate "n" output pad.
*/
#define PAL_MODE_OUTPUT_ALTERNATE(n) (PAL_SPC5_IBE | PAL_SPC5_OBE | \
PAL_SPC5_PA(n))
/** @} */
/*===========================================================================*/
/* I/O Ports Types and constants. */
/*===========================================================================*/
/**
* @brief Width, in bits, of an I/O port.
*/
#define PAL_IOPORTS_WIDTH 16
/**
* @brief Whole port mask.
* @brief This macro specifies all the valid bits into a port.
*/
#define PAL_WHOLE_PORT ((ioportmask_t)0xFFFF)
/**
* @brief Digital I/O port sized unsigned type.
*/
typedef uint16_t ioportmask_t;
/**
* @brief Digital I/O modes.
*/
typedef uint16_t iomode_t;
/**
* @brief Port Identifier.
* @details This type can be a scalar or some kind of pointer, do not make
* any assumption about it, use the provided macros when populating
* variables of this type.
*/
typedef uint32_t ioportid_t;
/**
* @brief SIU/SIUL register initializer type.
*/
typedef struct {
uint8_t pcr_index;
uint8_t gpdo_value;
iomode_t pcr_value;
} spc_siu_init_t;
/**
* @brief Generic I/O ports static initializer.
* @details An instance of this structure must be passed to @p palInit() at
* system startup time in order to initialized the digital I/O
* subsystem. This represents only the initial setup, specific pads
* or whole ports can be reprogrammed at later time.
* @note Implementations may extend this structure to contain more,
* architecture dependent, fields.
*/
typedef struct {
iomode_t default_mode;
const spc_siu_init_t *inits;
const uint8_t *padsels;
} PALConfig;
/*===========================================================================*/
/* I/O Ports Identifiers. */
/*===========================================================================*/
/**
* @brief I/O port 1 identifier.
*/
#define PA 0
/**
* @brief I/O port 2 identifier.
*/
#define PB 1
/**
* @brief I/O port 3 identifier.
*/
#define PC 2
/**
* @brief I/O port 4 identifier.
*/
#define PD 3
/*===========================================================================*/
/* Implementation, some of the following macros could be implemented as */
/* functions, if so please put them in pal_lld.c. */
/*===========================================================================*/
/**
* @brief Port bit helper macro.
* @note Overrides the one in @p pal.h.
*
* @param[in] n bit position within the port
*
* @return The bit mask.
*/
#define PAL_PORT_BIT(n) ((ioportmask_t)(0x8000U >> (n)))
/**
* @brief Low level PAL subsystem initialization.
*
* @param[in] config architecture-dependent ports configuration
*
* @notapi
*/
#define pal_lld_init(config) _pal_lld_init(config)
#if SPC5_SIU_SUPPORTS_PORTS || defined(__DOXYGEN__)
/**
* @brief Reads the physical I/O port states.
*
* @param[in] port port identifier
* @return The port bits.
*
* @notapi
*/
#define pal_lld_readport(port) (((volatile uint16_t *)SIU.PGPDI)[port])
/**
* @brief Reads the output latch.
* @details The purpose of this function is to read back the latched output
* value.
*
* @param[in] port port identifier
* @return The latched logical states.
*
* @notapi
*/
#define pal_lld_readlatch(port) (((volatile uint16_t *)SIU.PGPDO)[port])
/**
* @brief Writes a bits mask on a I/O port.
*
* @param[in] port port identifier
* @param[in] bits bits to be written on the specified port
*
* @notapi
*/
#define pal_lld_writeport(port, bits) \
(((volatile uint16_t *)SIU.PGPDO)[port] = (bits))
/**
* @brief Reads a group of bits.
*
* @param[in] port port identifier
* @param[in] mask group mask
* @param[in] offset group bit offset within the port
* @return The group logical states.
*
* @notapi
*/
#define pal_lld_readgroup(port, mask, offset) \
_pal_lld_readgroup(port, mask, offset)
/**
* @brief Writes a group of bits.
*
* @param[in] port port identifier
* @param[in] mask group mask
* @param[in] offset group bit offset within the port
* @param[in] bits bits to be written. Values exceeding the group width
* are masked.
*
* @notapi
*/
#define pal_lld_writegroup(port, mask, offset, bits) \
_pal_lld_writegroup(port, mask, offset, bits)
#endif /* SPC5_SIU_SUPPORTS_PORTS */
/**
* @brief Pads group mode setup.
* @details This function programs a pads group belonging to the same port
* with the specified mode.
* @note Programming an unknown or unsupported mode is silently ignored.
*
* @param[in] port port identifier
* @param[in] mask group mask
* @param[in] offset group bit offset within the port
* @param[in] mode group mode
*
* @notapi
*/
#define pal_lld_setgroupmode(port, mask, offset, mode) \
_pal_lld_setgroupmode(port, mask << offset, mode)
/**
* @brief Reads a logical state from an I/O pad.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
* @return The logical state.
* @retval PAL_LOW low logical state.
* @retval PAL_HIGH high logical state.
*
* @notapi
*/
#define pal_lld_readpad(port, pad) \
(SIU.GPDI[((port) * 16) + (pad)].R)
/**
* @brief Writes a logical state on an output pad.
* @note This function is not meant to be invoked directly by the
* application code.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
* @param[in] bit logical value, the value must be @p PAL_LOW or
* @p PAL_HIGH
*
* @notapi
*/
#define pal_lld_writepad(port, pad, bit) \
(SIU.GPDO[((port) * 16) + (pad)].R = (bit))
/**
* @brief Sets a pad logical state to @p PAL_HIGH.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
*
* @notapi
*/
#define pal_lld_setpad(port, pad) \
(SIU.GPDO[((port) * 16) + (pad)].R = 1)
/**
* @brief Clears a pad logical state to @p PAL_LOW.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
*
* @notapi
*/
#define pal_lld_clearpad(port, pad) \
(SIU.GPDO[((port) * 16) + (pad)].R = 0)
/**
* @brief Pad mode setup.
* @details This function programs a pad with the specified mode.
* @note The @ref PAL provides a default software implementation of this
* functionality, implement this function if can optimize it by using
* special hardware functionalities or special coding.
* @note Programming an unknown or unsupported mode is silently ignored.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
* @param[in] mode pad mode
*
* @notapi
*/
#define pal_lld_setpadmode(port, pad, mode)
extern const PALConfig pal_default_config;
#ifdef __cplusplus
extern "C" {
#endif
void _pal_lld_init(const PALConfig *config);
ioportmask_t _pal_lld_readgroup(ioportid_t port,
ioportmask_t mask,
uint_fast8_t offset);
void _pal_lld_writegroup(ioportid_t port,
ioportmask_t mask,
uint_fast8_t offset,
ioportmask_t bits);
void _pal_lld_setgroupmode(ioportid_t port,
ioportmask_t mask,
iomode_t mode);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_PAL */
#endif /* _PAL_LLD_H_ */
/** @} */
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