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author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-08-09 08:24:22 +0000 |
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committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-08-09 08:24:22 +0000 |
commit | 8ca210a4af9fd039e290cfcc309adde543999c1f (patch) | |
tree | 1aa594d5e65d5ebabdd358acbe8d3a9ac29f2070 /os/hal/src/spi.c | |
parent | cb453a3a12464dd71856b1354d083b5b02260870 (diff) | |
download | ChibiOS-8ca210a4af9fd039e290cfcc309adde543999c1f.tar.gz ChibiOS-8ca210a4af9fd039e290cfcc309adde543999c1f.tar.bz2 ChibiOS-8ca210a4af9fd039e290cfcc309adde543999c1f.zip |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6108 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/src/spi.c')
-rw-r--r-- | os/hal/src/spi.c | 439 |
1 files changed, 0 insertions, 439 deletions
diff --git a/os/hal/src/spi.c b/os/hal/src/spi.c deleted file mode 100644 index b2ddf48d2..000000000 --- a/os/hal/src/spi.c +++ /dev/null @@ -1,439 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
- 2011,2012,2013 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 spi.c
- * @brief SPI Driver code.
- *
- * @addtogroup SPI
- * @{
- */
-
-#include "ch.h"
-#include "hal.h"
-
-#if HAL_USE_SPI || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief SPI Driver initialization.
- * @note This function is implicitly invoked by @p halInit(), there is
- * no need to explicitly initialize the driver.
- *
- * @init
- */
-void spiInit(void) {
-
- spi_lld_init();
-}
-
-/**
- * @brief Initializes the standard part of a @p SPIDriver structure.
- *
- * @param[out] spip pointer to the @p SPIDriver object
- *
- * @init
- */
-void spiObjectInit(SPIDriver *spip) {
-
- spip->state = SPI_STOP;
- spip->config = NULL;
-#if SPI_USE_WAIT
- spip->thread = NULL;
-#endif /* SPI_USE_WAIT */
-#if SPI_USE_MUTUAL_EXCLUSION
-#if CH_CFG_USE_MUTEXES
- chMtxInit(&spip->mutex);
-#else
- chSemInit(&spip->semaphore, 1);
-#endif
-#endif /* SPI_USE_MUTUAL_EXCLUSION */
-#if defined(SPI_DRIVER_EXT_INIT_HOOK)
- SPI_DRIVER_EXT_INIT_HOOK(spip);
-#endif
-}
-
-/**
- * @brief Configures and activates the SPI peripheral.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] config pointer to the @p SPIConfig object
- *
- * @api
- */
-void spiStart(SPIDriver *spip, const SPIConfig *config) {
-
- chDbgCheck((spip != NULL) && (config != NULL), "spiStart");
-
- chSysLock();
- chDbgAssert((spip->state == SPI_STOP) || (spip->state == SPI_READY),
- "spiStart(), #1", "invalid state");
- spip->config = config;
- spi_lld_start(spip);
- spip->state = SPI_READY;
- chSysUnlock();
-}
-
-/**
- * @brief Deactivates the SPI peripheral.
- * @note Deactivating the peripheral also enforces a release of the slave
- * select line.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- *
- * @api
- */
-void spiStop(SPIDriver *spip) {
-
- chDbgCheck(spip != NULL, "spiStop");
-
- chSysLock();
- chDbgAssert((spip->state == SPI_STOP) || (spip->state == SPI_READY),
- "spiStop(), #1", "invalid state");
- spi_lld_stop(spip);
- spip->state = SPI_STOP;
- chSysUnlock();
-}
-
-/**
- * @brief Asserts the slave select signal and prepares for transfers.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- *
- * @api
- */
-void spiSelect(SPIDriver *spip) {
-
- chDbgCheck(spip != NULL, "spiSelect");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiSelect(), #1", "not ready");
- spiSelectI(spip);
- chSysUnlock();
-}
-
-/**
- * @brief Deasserts the slave select signal.
- * @details The previously selected peripheral is unselected.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- *
- * @api
- */
-void spiUnselect(SPIDriver *spip) {
-
- chDbgCheck(spip != NULL, "spiUnselect");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiUnselect(), #1", "not ready");
- spiUnselectI(spip);
- chSysUnlock();
-}
-
-/**
- * @brief Ignores data on the SPI bus.
- * @details This asynchronous function starts the transmission of a series of
- * idle words on the SPI bus and ignores the received data.
- * @pre A slave must have been selected using @p spiSelect() or
- * @p spiSelectI().
- * @post At the end of the operation the configured callback is invoked.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] n number of words to be ignored
- *
- * @api
- */
-void spiStartIgnore(SPIDriver *spip, size_t n) {
-
- chDbgCheck((spip != NULL) && (n > 0), "spiStartIgnore");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiStartIgnore(), #1", "not ready");
- spiStartIgnoreI(spip, n);
- chSysUnlock();
-}
-
-/**
- * @brief Exchanges data on the SPI bus.
- * @details This asynchronous function starts a simultaneous transmit/receive
- * operation.
- * @pre A slave must have been selected using @p spiSelect() or
- * @p spiSelectI().
- * @post At the end of the operation the configured callback is invoked.
- * @note The buffers are organized as uint8_t arrays for data sizes below
- * or equal to 8 bits else it is organized as uint16_t arrays.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] n number of words to be exchanged
- * @param[in] txbuf the pointer to the transmit buffer
- * @param[out] rxbuf the pointer to the receive buffer
- *
- * @api
- */
-void spiStartExchange(SPIDriver *spip, size_t n,
- const void *txbuf, void *rxbuf) {
-
- chDbgCheck((spip != NULL) && (n > 0) && (rxbuf != NULL) && (txbuf != NULL),
- "spiStartExchange");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiStartExchange(), #1", "not ready");
- spiStartExchangeI(spip, n, txbuf, rxbuf);
- chSysUnlock();
-}
-
-/**
- * @brief Sends data over the SPI bus.
- * @details This asynchronous function starts a transmit operation.
- * @pre A slave must have been selected using @p spiSelect() or
- * @p spiSelectI().
- * @post At the end of the operation the configured callback is invoked.
- * @note The buffers are organized as uint8_t arrays for data sizes below
- * or equal to 8 bits else it is organized as uint16_t arrays.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] n number of words to send
- * @param[in] txbuf the pointer to the transmit buffer
- *
- * @api
- */
-void spiStartSend(SPIDriver *spip, size_t n, const void *txbuf) {
-
- chDbgCheck((spip != NULL) && (n > 0) && (txbuf != NULL),
- "spiStartSend");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiStartSend(), #1", "not ready");
- spiStartSendI(spip, n, txbuf);
- chSysUnlock();
-}
-
-/**
- * @brief Receives data from the SPI bus.
- * @details This asynchronous function starts a receive operation.
- * @pre A slave must have been selected using @p spiSelect() or
- * @p spiSelectI().
- * @post At the end of the operation the configured callback is invoked.
- * @note The buffers are organized as uint8_t arrays for data sizes below
- * or equal to 8 bits else it is organized as uint16_t arrays.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] n number of words to receive
- * @param[out] rxbuf the pointer to the receive buffer
- *
- * @api
- */
-void spiStartReceive(SPIDriver *spip, size_t n, void *rxbuf) {
-
- chDbgCheck((spip != NULL) && (n > 0) && (rxbuf != NULL),
- "spiStartReceive");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiStartReceive(), #1", "not ready");
- spiStartReceiveI(spip, n, rxbuf);
- chSysUnlock();
-}
-
-#if SPI_USE_WAIT || defined(__DOXYGEN__)
-/**
- * @brief Ignores data on the SPI bus.
- * @details This synchronous function performs the transmission of a series of
- * idle words on the SPI bus and ignores the received data.
- * @pre In order to use this function the option @p SPI_USE_WAIT must be
- * enabled.
- * @pre In order to use this function the driver must have been configured
- * without callbacks (@p end_cb = @p NULL).
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] n number of words to be ignored
- *
- * @api
- */
-void spiIgnore(SPIDriver *spip, size_t n) {
-
- chDbgCheck((spip != NULL) && (n > 0), "spiIgnoreWait");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiIgnore(), #1", "not ready");
- chDbgAssert(spip->config->end_cb == NULL, "spiIgnore(), #2", "has callback");
- spiStartIgnoreI(spip, n);
- _spi_wait_s(spip);
- chSysUnlock();
-}
-
-/**
- * @brief Exchanges data on the SPI bus.
- * @details This synchronous function performs a simultaneous transmit/receive
- * operation.
- * @pre In order to use this function the option @p SPI_USE_WAIT must be
- * enabled.
- * @pre In order to use this function the driver must have been configured
- * without callbacks (@p end_cb = @p NULL).
- * @note The buffers are organized as uint8_t arrays for data sizes below
- * or equal to 8 bits else it is organized as uint16_t arrays.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] n number of words to be exchanged
- * @param[in] txbuf the pointer to the transmit buffer
- * @param[out] rxbuf the pointer to the receive buffer
- *
- * @api
- */
-void spiExchange(SPIDriver *spip, size_t n,
- const void *txbuf, void *rxbuf) {
-
- chDbgCheck((spip != NULL) && (n > 0) && (rxbuf != NULL) && (txbuf != NULL),
- "spiExchange");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiExchange(), #1", "not ready");
- chDbgAssert(spip->config->end_cb == NULL,
- "spiExchange(), #2", "has callback");
- spiStartExchangeI(spip, n, txbuf, rxbuf);
- _spi_wait_s(spip);
- chSysUnlock();
-}
-
-/**
- * @brief Sends data over the SPI bus.
- * @details This synchronous function performs a transmit operation.
- * @pre In order to use this function the option @p SPI_USE_WAIT must be
- * enabled.
- * @pre In order to use this function the driver must have been configured
- * without callbacks (@p end_cb = @p NULL).
- * @note The buffers are organized as uint8_t arrays for data sizes below
- * or equal to 8 bits else it is organized as uint16_t arrays.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] n number of words to send
- * @param[in] txbuf the pointer to the transmit buffer
- *
- * @api
- */
-void spiSend(SPIDriver *spip, size_t n, const void *txbuf) {
-
- chDbgCheck((spip != NULL) && (n > 0) && (txbuf != NULL), "spiSend");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiSend(), #1", "not ready");
- chDbgAssert(spip->config->end_cb == NULL, "spiSend(), #2", "has callback");
- spiStartSendI(spip, n, txbuf);
- _spi_wait_s(spip);
- chSysUnlock();
-}
-
-/**
- * @brief Receives data from the SPI bus.
- * @details This synchronous function performs a receive operation.
- * @pre In order to use this function the option @p SPI_USE_WAIT must be
- * enabled.
- * @pre In order to use this function the driver must have been configured
- * without callbacks (@p end_cb = @p NULL).
- * @note The buffers are organized as uint8_t arrays for data sizes below
- * or equal to 8 bits else it is organized as uint16_t arrays.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] n number of words to receive
- * @param[out] rxbuf the pointer to the receive buffer
- *
- * @api
- */
-void spiReceive(SPIDriver *spip, size_t n, void *rxbuf) {
-
- chDbgCheck((spip != NULL) && (n > 0) && (rxbuf != NULL),
- "spiReceive");
-
- chSysLock();
- chDbgAssert(spip->state == SPI_READY, "spiReceive(), #1", "not ready");
- chDbgAssert(spip->config->end_cb == NULL,
- "spiReceive(), #2", "has callback");
- spiStartReceiveI(spip, n, rxbuf);
- _spi_wait_s(spip);
- chSysUnlock();
-}
-#endif /* SPI_USE_WAIT */
-
-#if SPI_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
-/**
- * @brief Gains exclusive access to the SPI bus.
- * @details This function tries to gain ownership to the SPI bus, if the bus
- * is already being used then the invoking thread is queued.
- * @pre In order to use this function the option @p SPI_USE_MUTUAL_EXCLUSION
- * must be enabled.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- *
- * @api
- */
-void spiAcquireBus(SPIDriver *spip) {
-
- chDbgCheck(spip != NULL, "spiAcquireBus");
-
-#if CH_CFG_USE_MUTEXES
- chMtxLock(&spip->mutex);
-#elif CH_CFG_USE_SEMAPHORES
- chSemWait(&spip->semaphore);
-#endif
-}
-
-/**
- * @brief Releases exclusive access to the SPI bus.
- * @pre In order to use this function the option @p SPI_USE_MUTUAL_EXCLUSION
- * must be enabled.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- *
- * @api
- */
-void spiReleaseBus(SPIDriver *spip) {
-
- chDbgCheck(spip != NULL, "spiReleaseBus");
-
-#if CH_CFG_USE_MUTEXES
- (void)spip;
- chMtxUnlock();
-#elif CH_CFG_USE_SEMAPHORES
- chSemSignal(&spip->semaphore);
-#endif
-}
-#endif /* SPI_USE_MUTUAL_EXCLUSION */
-
-#endif /* HAL_USE_SPI */
-
-/** @} */
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