From 20eb1fa15dcee331d9e45ab54aee8d09a5f5e925 Mon Sep 17 00:00:00 2001 From: Giovanni Di Sirio Date: Sat, 2 Apr 2016 09:09:22 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9214 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/ports/LPC/LPC214x/hal_spi_lld.h | 207 +++++++++++++++++++++++++++++++++ 1 file changed, 207 insertions(+) create mode 100644 os/hal/ports/LPC/LPC214x/hal_spi_lld.h (limited to 'os/hal/ports/LPC/LPC214x/hal_spi_lld.h') diff --git a/os/hal/ports/LPC/LPC214x/hal_spi_lld.h b/os/hal/ports/LPC/LPC214x/hal_spi_lld.h new file mode 100644 index 000000000..57dd92c97 --- /dev/null +++ b/os/hal/ports/LPC/LPC214x/hal_spi_lld.h @@ -0,0 +1,207 @@ +/* + ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio + + 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 LPC214x/spi_lld.h + * @brief LPC214x low level SPI driver header. + * + * @addtogroup SPI + * @{ + */ + +#ifndef HAL_SPI_LLD_H +#define HAL_SPI_LLD_H + +#if HAL_USE_SPI || defined(__DOXYGEN__) + +/*===========================================================================*/ +/* Driver constants. */ +/*===========================================================================*/ + +/** + * @brief Hardware FIFO depth. + */ +#define LPC214x_SSP_FIFO_DEPTH 8 + +/*===========================================================================*/ +/* Driver pre-compile time settings. */ +/*===========================================================================*/ + +/** + * @brief SPI1 driver enable switch. + * @details If set to @p TRUE the support for SSP is included. + * @note The default is @p TRUE. + */ +#if !defined(LPC214x_SPI_USE_SSP) || defined(__DOXYGEN__) +#define LPC214x_SPI_USE_SSP TRUE +#endif + +/** + * @brief SSP interrupt priority level setting. + */ +#if !defined(LPC214x_SPI_SSP_IRQ_PRIORITY) || defined(__DOXYGEN__) +#define LPC214x_SPI_SSP_IRQ_PRIORITY 4 +#endif + +/** + * @brief Overflow error hook. + * @details The default action is to stop the system. + */ +#if !defined(LPC214x_SPI_SSP_ERROR_HOOK) || defined(__DOXYGEN__) +#define LPC214x_SPI_SSP_ERROR_HOOK() osalSysHalt() +#endif + +/*===========================================================================*/ +/* Derived constants and error checks. */ +/*===========================================================================*/ + +#if !LPC214x_SPI_USE_SSP +#error "SPI driver activated but no SPI peripheral assigned" +#endif + +/*===========================================================================*/ +/* Driver data structures and types. */ +/*===========================================================================*/ + +/** + * @brief Type of a structure representing an SPI driver. + */ +typedef struct SPIDriver SPIDriver; + +/** + * @brief SPI notification callback type. + * + * @param[in] spip pointer to the @p SPIDriver object triggering the + * callback + */ +typedef void (*spicallback_t)(SPIDriver *spip); + +/** + * @brief Driver configuration structure. + */ +typedef struct { + /** + * @brief Operation complete callback or @p NULL. + */ + spicallback_t end_cb; + /* End of the mandatory fields.*/ + /** + * @brief The chip select line port. + */ + ioportid_t ssport; + /** + * @brief The chip select line pad number. + */ + uint16_t sspad; + /** + * @brief SSP CR0 initialization data. + */ + uint16_t cr0; + /** + * @brief SSP CPSR initialization data. + */ + uint32_t cpsr; +} SPIConfig; + +/** + * @brief Structure representing a SPI driver. + */ +struct SPIDriver { + /** + * @brief Driver state. + */ + spistate_t state; + /** + * @brief Current configuration data. + */ + const SPIConfig *config; +#if SPI_USE_WAIT || defined(__DOXYGEN__) + /** + * @brief Waiting thread. + */ + Thread *thread; +#endif /* SPI_USE_WAIT */ +#if SPI_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__) +#if CH_USE_MUTEXES || defined(__DOXYGEN__) + /** + * @brief Mutex protecting the bus. + */ + Mutex mutex; +#elif CH_USE_SEMAPHORES + Semaphore semaphore; +#endif +#endif /* SPI_USE_MUTUAL_EXCLUSION */ +#if defined(SPI_DRIVER_EXT_FIELDS) + SPI_DRIVER_EXT_FIELDS +#endif + /* End of the mandatory fields.*/ + /** + * @brief Pointer to the SSP registers block. + */ + SSP *ssp; + /** + * @brief Number of bytes yet to be received. + */ + uint32_t rxcnt; + /** + * @brief Receive pointer or @p NULL. + */ + void *rxptr; + /** + * @brief Number of bytes yet to be transmitted. + */ + uint32_t txcnt; + /** + * @brief Transmit pointer or @p NULL. + */ + const void *txptr; +}; + +/*===========================================================================*/ +/* Driver macros. */ +/*===========================================================================*/ + +/*===========================================================================*/ +/* External declarations. */ +/*===========================================================================*/ + +#if LPC214x_SPI_USE_SSP && !defined(__DOXYGEN__) +extern SPIDriver SPID1; +#endif + +#ifdef __cplusplus +extern "C" { +#endif + void spi_lld_init(void); + void spi_lld_start(SPIDriver *spip); + void spi_lld_stop(SPIDriver *spip); + void spi_lld_select(SPIDriver *spip); + void spi_lld_unselect(SPIDriver *spip); + void spi_lld_ignore(SPIDriver *spip, size_t n); + void spi_lld_exchange(SPIDriver *spip, size_t n, + const void *txbuf, void *rxbuf); + void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf); + void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf); + uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame); +#ifdef __cplusplus +} +#endif + +#endif /* HAL_USE_SPI */ + +#endif /* HAL_SPI_LLD_H */ + +/** @} */ -- cgit v1.2.3