/* ChibiOS - Copyright (C) 2020 Yaotian Feng / Codetector Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ /** * @file hal_pal_lld.h * @brief LPC11Uxx PAL subsystem low level driver header. * * @addtogroup PAL * @{ */ #ifndef HAL_PAL_LLD_H #define HAL_PAL_LLD_H #if (HAL_USE_PAL == TRUE) || defined(__DOXYGEN__) /*===========================================================================*/ /* Unsupported modes and specific modes */ /*===========================================================================*/ /* Specifies palInit() without parameter, required until all platforms will be updated to the new style.*/ #define PAL_NEW_INIT /*===========================================================================*/ /* 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 #define PAL_MODE_INPUT_PULLUP (MODE_DIR_IN | MODE_MODE_PULL_UP | MODE_AD_DIGITAL) #define PAL_MODE_INPUT_PULLDOWN (MODE_DIR_IN | MODE_MODE_PULL_DOWN | MODE_AD_DIGITAL) #define PAL_MODE_OUTPUT_OPENDRAIN (MODE_DIR_OUT | MODE_OD_ENABLE | MODE_AD_DIGITAL) /* LPC11Uxx does not support true pushpull output, but its non-opendrain output * is sufficient in many use cases, so convenient to alias PUSHPULL to it. */ #define PAL_MODE_OUTPUT_PUSHPULL (MODE_DIR_OUT | MODE_AD_DIGITAL) /*===========================================================================*/ /* I/O Ports Types and constants. */ /*===========================================================================*/ /** * @name Port related definitions * @{ */ /** * @brief Width, in bits, of an I/O port. */ #define PAL_IOPORTS_WIDTH 32U /** * @brief Whole port mask. * @details This macro specifies all the valid bits into a port. */ #define PAL_WHOLE_PORT ((ioportmask_t)0xFFFFFFFFU) /** @} */ /** * @name Line handling macros * @{ */ /** * @brief Forms a line identifier. * @details A port/pad pair are encoded into an @p ioline_t type. The encoding * of this type is platform-dependent. */ #define PAL_LINE(port, pad) \ ((ioline_t)((uint32_t)(port)) | ((uint32_t)(pad))) /** * @brief Decodes a port identifier from a line identifier. */ #define PAL_PORT(line) \ (((uint32_t)(line)) & 0xFFFFFF00U) /** * @brief Decodes a pad identifier from a line identifier. */ #define PAL_PAD(line) \ (((uint32_t)(line) & 0x000000FFU)) /** * @brief Value identifying an invalid line. */ #define PAL_NOLINE 0U /** @} */ /** * @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 { } PALConfig; /** * @brief Digital I/O port sized unsigned type. */ typedef uint32_t ioportmask_t; /** * @brief Digital I/O modes. */ typedef uint32_t iomode_t; #define MODE_IOCONF_MASK 0xFFFF #define MODE_FUNC_POS 0U #define MODE_FUNC_MASK (0x7U << MODE_FUNC_POS) #define MODE_FUNC_DEFAULT (0x0U << MODE_FUNC_POS) #define MODE_FUNC_ALT1 (0x1U << MODE_FUNC_POS) #define MODE_FUNC_ALT2 (0x2U << MODE_FUNC_POS) #define MODE_FUNC_ALT3 (0x3U << MODE_FUNC_POS) #define MODE_FUNC_ALT4 (0x4U << MODE_FUNC_POS) #define MODE_FUNC_ALT5 (0x5U << MODE_FUNC_POS) #define MODE_FUNC_ALT6 (0x6U << MODE_FUNC_POS) #define MODE_FUNC_ALT7 (0x7U << MODE_FUNC_POS) #define MODE_MODE_POS 3U #define MODE_MODE_MASK (0x3U << MODE_MODE_POS) #define MODE_MODE_INACTIVE (0x0U << MODE_MODE_POS) #define MODE_MODE_PULL_DOWN (0x1U << MODE_MODE_POS) #define MODE_MODE_PULL_UP (0x2U << MODE_MODE_POS) #define MODE_MODE_REPEATER (0x3U << MODE_MODE_POS) #define MODE_HYS_POS 5U #define MODE_HYS_DISABLE (0x0U << MODE_HYS_POS) #define MODE_HYS_ENABLE (0x1U << MODE_HYS_POS) #define MODE_INV_POS 6U #define MODE_INV_DISABLE (0x0U << MODE_INV_POS) #define MODE_INV_ENABLE (0x1U << MODE_INV_POS) #define MODE_AD_POS 7U #define MODE_AD_MASK (1U << MODE_AD_POS) #define MODE_AD_ANALOG (0U << MODE_AD_POS) #define MODE_AD_DIGITAL (1U << MODE_AD_POS) #define MODE_OD_ENABLE (1U << 10U) #define MODE_DIR_POS 31U #define MODE_DIR_MASK (0x1U << MODE_DIR_POS) #define MODE_DIR_IN (0U << MODE_DIR_POS) #define MODE_DIR_OUT (1U << MODE_DIR_POS) /** * @brief Type of an I/O line. */ typedef uint32_t ioline_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 Type of an pad identifier. */ typedef uint32_t iopadid_t; /*===========================================================================*/ /* I/O Ports Identifiers. */ /*===========================================================================*/ /** * @brief First I/O port identifier. * @details Low level drivers can define multiple ports, it is suggested to * use this naming convention. */ #define LPC_IOPORT_ID(x) ((x) << 8U) #define LPC_IOPORT_NUM(x) ((x) >> 8U) #define IOPORT0 LPC_IOPORT_ID(0) #define IOPORT1 LPC_IOPORT_ID(1) /*===========================================================================*/ /* Implementation, some of the following macros could be implemented as */ /* functions, if so please put them in pal_lld.c. */ /*===========================================================================*/ /** * @brief Low level PAL subsystem initialization. * * @notapi */ #define pal_lld_init() _pal_lld_init() /** * @brief Reads the physical I/O port states. * * @param[in] port port identifier * @return The port bits. * * @notapi */ #define pal_lld_readport(port) \ (LPC_GPIO->PIN[LPC_IOPORT_NUM(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) \ (LPC_GPIO->PIN[LPC_IOPORT_NUM(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) \ do { \ (LPC_GPIO->PIN[LPC_IOPORT_NUM(port)]) = bits; \ } while (false) /** * @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 Sets a bits mask on a I/O port. * @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] bits bits to be ORed on the specified port * * @notapi */ #define pal_lld_setport(port, bits) \ do { \ (LPC_GPIO->SET[LPC_IOPORT_NUM(port)]) = bits; \ } while (false) /** * @brief Clears a bits mask on a I/O port. * @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] bits bits to be cleared on the specified port * * @notapi */ #define pal_lld_clearport(port, bits) \ do { \ (LPC_GPIO->CLR[LPC_IOPORT_NUM(port)]) = bits; \ } while (false) /** * @brief Toggles a bits mask on a I/O port. * @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] bits bits to be XORed on the specified port * * @notapi */ #define pal_lld_toggleport(port, bits) \ do { \ (LPC_GPIO->NOT[LPC_IOPORT_NUM(port)]) = bits; \ } while (false) /** * @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) \ (LPC_GPIO->BP[(PAL_IOPORTS_WIDTH * LPC_IOPORT_NUM(port)) + pad]) /** * @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) \ do { \ (LPC_GPIO->BP[(PAL_IOPORTS_WIDTH * LPC_IOPORT_NUM(port)) + pad]) = bit; \ \ } while (false) /** * @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) \ _pal_lld_setpadmode(port, pad, mode) /** * @brief Returns a PAL event structure associated to a pad. * * @param[in] port port identifier * @param[in] pad pad number within the port * * @notapi */ #define pal_lld_get_pad_event(port, pad) \ &_pal_events[0]; (void)(port); (void)pad /** * @brief Returns a PAL event structure associated to a line. * * @param[in] line line identifier * * @notapi */ #define pal_lld_get_line_event(line) \ &_pal_events[0]; (void)line #if !defined(__DOXYGEN__) #if (PAL_USE_WAIT == TRUE) || (PAL_USE_CALLBACKS == TRUE) extern palevent_t _pal_events[1]; #endif #endif #ifdef __cplusplus extern "C" { #endif void _pal_lld_init(void); void _pal_lld_setgroupmode(ioportid_t port, ioportmask_t mask, iomode_t mode); void _pal_lld_setpadmode(ioportid_t port, iopadid_t pad, iomode_t mode); #ifdef __cplusplus } #endif #endif /* HAL_USE_PAL == TRUE */ #endif /* HAL_PAL_LLD_H */ /** @} */