From d4c616e6eeb0587ca450c75b1086efa77ac690e5 Mon Sep 17 00:00:00 2001 From: gdisirio Date: Sun, 29 Nov 2009 08:50:13 +0000 Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1351 35acf78f-673a-0410-8e92-d51de3d6d3f4 --- os/hal/platforms/STM32/spi_lld.h | 210 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 210 insertions(+) create mode 100644 os/hal/platforms/STM32/spi_lld.h (limited to 'os/hal/platforms/STM32/spi_lld.h') diff --git a/os/hal/platforms/STM32/spi_lld.h b/os/hal/platforms/STM32/spi_lld.h new file mode 100644 index 000000000..e065ed2d4 --- /dev/null +++ b/os/hal/platforms/STM32/spi_lld.h @@ -0,0 +1,210 @@ +/* + ChibiOS/RT - Copyright (C) 2006-2007 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 . +*/ + +/** + * @file STM32/spi_lld.h + * @brief STM32 SPI subsystem low level driver header + * @addtogroup STM32_SPI + * @{ + */ + +#ifndef _SPI_LLD_H_ +#define _SPI_LLD_H_ + +#if CH_HAL_USE_SPI + +/*===========================================================================*/ +/* Driver pre-compile time settings. */ +/*===========================================================================*/ + +/** + * @brief SPI1 driver enable switch. + * @details If set to @p TRUE the support for SPI1 is included. + * @note The default is @p TRUE. + */ +#if !defined(USE_STM32_SPI1) || defined(__DOXYGEN__) +#define USE_STM32_SPI1 TRUE +#endif + +/** + * @brief SPI2 driver enable switch. + * @details If set to @p TRUE the support for SPI2 is included. + * @note The default is @p TRUE. + */ +#if !defined(USE_STM32_SPI2) || defined(__DOXYGEN__) +#define USE_STM32_SPI2 TRUE +#endif + +/** + * @brief SPI1 DMA priority (0..3|lowest..highest). + * @note The priority level is used for both the TX and RX DMA channels but + * because of the channels ordering the RX channel has always priority + * over the TX channel. + */ +#if !defined(SPI1_DMA_PRIORITY) || defined(__DOXYGEN__) +#define STM32_SPI1_DMA_PRIORITY 2 +#endif + +/** + * @brief SPI2 DMA priority (0..3|lowest..highest). + * @note The priority level is used for both the TX and RX DMA channels but + * because of the channels ordering the RX channel has always priority + * over the TX channel. + */ +#if !defined(SPI2_DMA_PRIORITY) || defined(__DOXYGEN__) +#define STM32_SPI2_DMA_PRIORITY 2 +#endif + +/** + * @brief SPI1 interrupt priority level setting. + * @note @p BASEPRI_KERNEL >= @p STM32_SPI1_IRQ_PRIORITY > @p PRIORITY_PENDSV. + */ +#if !defined(STM32_SPI1_IRQ_PRIORITY) || defined(__DOXYGEN__) +#define STM32_SPI1_IRQ_PRIORITY 0x60 +#endif + +/** + * @brief SPI2 interrupt priority level setting. + * @note @p BASEPRI_KERNEL >= @p STM32_SPI2_IRQ_PRIORITY > @p PRIORITY_PENDSV. + */ +#if !defined(STM32_SPI2_IRQ_PRIORITY) || defined(__DOXYGEN__) +#define STM32_SPI2_IRQ_PRIORITY 0x60 +#endif + +/** + * @brief SPI1 DMA error hook. + * @note The default action for DMA errors is a system halt because DMA error + * can only happen because programming errors. + */ +#if !defined(STM32_SPI1_DMA_ERROR_HOOK) || defined(__DOXYGEN__) +#define STM32_SPI1_DMA_ERROR_HOOK() chSysHalt() +#endif + +/** + * @brief SPI2 DMA error hook. + * @note The default action for DMA errors is a system halt because DMA error + * can only happen because programming errors. + */ +#if !defined(STM32_SPI2_DMA_ERROR_HOOK) || defined(__DOXYGEN__) +#define STM32_SPI2_DMA_ERROR_HOOK() chSysHalt() +#endif + +/*===========================================================================*/ +/* Driver data structures and types. */ +/*===========================================================================*/ + +/** + * @brief Driver configuration structure. + */ +typedef struct { + /** + * @brief The chip select line port. + */ + ioportid_t spc_ssport; + /** + * @brief The chip select line pad number. + */ + uint16_t spc_sspad; + /** + * @brief SPI initialization data. + */ + uint16_t spc_cr1; +} SPIConfig; + +/** + * @brief Structure representing a SPI driver. + */ +typedef struct { + /** + * @brief Driver state. + */ + spistate_t spd_state; +#if SPI_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__) +#if CH_USE_MUTEXES || defined(__DOXYGEN__) + /** + * @brief Mutex protecting the bus. + */ + Mutex spd_mutex; +#elif CH_USE_SEMAPHORES + Semaphore spd_semaphore; +#endif +#endif /* SPI_USE_MUTUAL_EXCLUSION */ + /** + * @brief Current configuration data. + */ + const SPIConfig *spd_config; + /* End of the mandatory fields.*/ + /** + * @brief Thread waiting for I/O completion. + */ + Thread *spd_thread; + /** + * @brief Pointer to the SPIx registers block. + */ + SPI_TypeDef *spd_spi; + /** + * @brief Pointer to the receive DMA channel registers block. + */ + DMA_Channel_TypeDef *spd_dmarx; + /** + * @brief Pointer to the transmit DMA channel registers block. + */ + DMA_Channel_TypeDef *spd_dmatx; + /** + * @brief DMA priority bit mask. + */ + uint32_t spd_dmaprio; +} SPIDriver; + +/*===========================================================================*/ +/* External declarations. */ +/*===========================================================================*/ + +/** @cond never*/ +#if USE_STM32_SPI1 +extern SPIDriver SPID1; +#endif + +#if USE_STM32_SPI2 +extern SPIDriver SPID2; +#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); +#ifdef __cplusplus +} +#endif +/** @endcond*/ + +#endif /* CH_HAL_USE_SPI */ + +#endif /* _SPI_LLD_H_ */ + +/** @} */ -- cgit v1.2.3