diff options
Diffstat (limited to 'os/hal/platforms/STM8/spi_lld.h')
| -rw-r--r-- | os/hal/platforms/STM8/spi_lld.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/os/hal/platforms/STM8/spi_lld.h b/os/hal/platforms/STM8/spi_lld.h new file mode 100644 index 000000000..a66f83ad7 --- /dev/null +++ b/os/hal/platforms/STM8/spi_lld.h @@ -0,0 +1,193 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 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 LPC13xx/spi_lld.h
+ * @brief LPC13xx low level SPI driver header.
+ *
+ * @addtogroup SPI
+ * @{
+ */
+
+#ifndef _SPI_LLD_H_
+#define _SPI_LLD_H_
+
+#if CH_HAL_USE_SPI || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @brief SPI1 driver enable switch.
+ * @details If set to @p TRUE the support for device SSP0 is included.
+ * @note The default is @p TRUE.
+ */
+#if !defined(STM8_SPI_USE_SPI) || defined(__DOXYGEN__)
+#define STM8_SPI_USE_SPI TRUE
+#endif
+
+/**
+ * @brief Overflow error hook.
+ * @details The default action is to stop the system.
+ */
+#if !defined(STM8_SPI_SPI_ERROR_HOOK) || defined(__DOXYGEN__)
+#define STM8_SPI_SPI_ERROR_HOOK(spip) chSysHalt()
+#endif
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if !STM8_SPI_USE_SPI
+#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.
+ * @note In order to use synchronous functions this field must be set to
+ * @p NULL, callbacks and synchronous operations are mutually
+ * exclusive.
+ */
+ spicallback_t spc_endcb;
+ /* End of the mandatory fields.*/
+ /**
+ * @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.
+ */
+ uint8_t spc_cr1;
+} SPIConfig;
+
+/**
+ * @brief Structure representing a SPI driver.
+ */
+struct SPIDriver {
+ /**
+ * @brief Driver state.
+ */
+ spistate_t spd_state;
+ /**
+ * @brief Current configuration data.
+ */
+ const SPIConfig *spd_config;
+#if SPI_USE_WAIT || defined(__DOXYGEN__)
+ /**
+ * @brief Waiting thread.
+ */
+ Thread *spd_thread;
+#endif /* SPI_USE_WAIT */
+#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 */
+#if defined(SPI_DRIVER_EXT_FIELDS)
+ SPI_DRIVER_EXT_FIELDS
+#endif
+ /* End of the mandatory fields.*/
+ /**
+ * @brief Number of bytes yet to be received. + */
+ uint16_t spd_rxcnt;
+ /**
+ * @brief Receive pointer or @p NULL.
+ */
+ uint8_t *spd_rxptr;
+ /**
+ * @brief Number of bytes yet to be transmitted.
+ */
+ uint16_t spd_txcnt;
+ /**
+ * @brief Transmit pointer or @p NULL.
+ */
+ const uint8_t *spd_txptr;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if STM8_SPI_USE_SPI && !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);
+ uint8_t spi_lld_polled_exchange(SPIDriver *spip, uint8_t frame);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CH_HAL_USE_SPI */
+
+#endif /* _SPI_LLD_H_ */
+
+/** @} */
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