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| author | Giovanni Di Sirio <gdisirio@gmail.com> | 2016-04-02 09:09:22 +0000 |
|---|---|---|
| committer | Giovanni Di Sirio <gdisirio@gmail.com> | 2016-04-02 09:09:22 +0000 |
| commit | 20eb1fa15dcee331d9e45ab54aee8d09a5f5e925 (patch) | |
| tree | 94a019e18b3bda851a93dc85367528973d9107ef /os/hal/ports/LPC/LPC214x/hal_spi_lld.h | |
| parent | ab6c3ecaa01676ebad88637ad76b91899cb8a576 (diff) | |
| download | ChibiOS-20eb1fa15dcee331d9e45ab54aee8d09a5f5e925.tar.gz ChibiOS-20eb1fa15dcee331d9e45ab54aee8d09a5f5e925.tar.bz2 ChibiOS-20eb1fa15dcee331d9e45ab54aee8d09a5f5e925.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9214 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/ports/LPC/LPC214x/hal_spi_lld.h')
| -rw-r--r-- | os/hal/ports/LPC/LPC214x/hal_spi_lld.h | 207 |
1 files changed, 207 insertions, 0 deletions
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 */
+
+/** @} */
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