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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1250 35acf78f-673a-0410-8e92-d51de3d6d3f4

This commit is contained in:
gdisirio 2009-10-24 07:28:54 +00:00
parent 7808987547
commit 09194e6f22
5 changed files with 257 additions and 18 deletions
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86
os/io/platforms/STM32/spi_lld.c Normal file
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@ -0,0 +1,86 @@
/*
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 <http://www.gnu.org/licenses/>.
*/
/**
* @file templates/spi_lld.c
* @brief SPI Driver subsystem low level driver source template
* @addtogroup SPI_LLD
* @{
*/
#include <ch.h>
#include <spi.h>
/**
* @brief Low level SPI driver initialization.
*/
void spi_lld_init(void) {
}
/**
* @brief Low level SPI bus setup.
*
* @param[in] spip pointer to the @p SPIDriver object
*/
void spi_lld_setup(SPIDriver *spip) {
}
/**
* @brief Asserts the chip select signal and prepares for transfers.
*
* @param[in] spip pointer to the @p SPIDriver object
*/
void spi_lld_select(SPIDriver *spip) {
}
/**
* @brief De-asserts the chip select signal.
* @details The previously selected peripheral is unselected.
*
* @param[in] spip pointer to the @p SPIDriver object
*/
void spi_lld_unselect(SPIDriver *spip) {
}
/**
* @brief Exchanges data on the SPI bus.
* @details This function performs a simultaneous transmit/receive operation.
*
* @param[in] spip pointer to the @p SPIDriver object
* @param n number of words to be exchanged
* @param rxbuf the pointer to the receive buffer, if @p NULL is specified then
* the input data is discarded.
* Note that the buffer is organized as an uint8_t array for
* data sizes below or equal to 8 bits else it is organized as
* an uint16_t array.
* @param txbuf the pointer to the transmit buffer, if @p NULL is specified all
* ones are transmitted.
* Note that the buffer is organized as an uint8_t array for
* data sizes below or equal to 8 bits else it is organized as
* an uint16_t array.
*/
void spi_lld_exchange(SPIDriver *spip, size_t n, void *rxbuf, void *txbuf) {
}
/** @} */

112
os/io/platforms/STM32/spi_lld.h Normal file
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@ -0,0 +1,112 @@
/*
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 <http://www.gnu.org/licenses/>.
*/
/**
* @file templates/spi_lld.h
* @brief SPI Driver subsystem low level driver header template
* @addtogroup SPI_LLD
* @{
*/
#ifndef _SPI_LLD_H_
#define _SPI_LLD_H_
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief Enables the mutual exclusion APIs on the SPI bus.
*/
#if !defined(SPI_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
#define SPI_USE_MUTUAL_EXCLUSION TRUE
#endif
#if SPI_USE_MUTUAL_EXCLUSION && !CH_USE_MUTEXES && !CH_USE_SEMAPHORES
#error "SPI_USE_MUTUAL_EXCLUSION requires CH_USE_MUTEXES and/or CH_USE_SEMAPHORES"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/**
* @brief Driver state machine possible states.
*/
typedef enum {
SPI_UNINIT = 0,//!< SPI_UNINIT
SPI_IDLE = 1, //!< SPI_IDLE
SPI_ACTIVE = 2 //!< SPI_ACTIVE
} spistate_t;
/**
* @brief Driver configuration structure.
*/
typedef struct {
/**
* @brief Clock pulses to be generated after initialization.
*/
cnt_t spc_clkpulses;
/* End of the mandatory fields.*/
} SPIConfig;
/**
* @brief Structure representing a MAC 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 */
/**
* Current configuration data.
*/
const SPIConfig *spd_config;
/* End of the mandatory fields.*/
} SPIDriver;
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
void spi_lld_init(void);
void spi_lld_setup(SPIDriver *spip);
void spi_lld_select(SPIDriver *spip);
void spi_lld_unselect(SPIDriver *spip);
void spi_lld_exchange(SPIDriver *spip, size_t n, void *rxbuf, void *txbuf);
#ifdef __cplusplus
}
#endif
#endif /* _SPI_LLD_H_ */
/** @} */

20
os/io/spi.c
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@ -27,17 +27,6 @@
#include <ch.h>
#include <spi.h>
/*
* The following macros are used to enforce a correct sequence of operations
* when the OS asserts are enabled. The overhead is removed when not in debug
* mode.
*/
#ifdef CH_DBG_ENABLE_ASSERTS
#define SPI_SET_STATE(spip, sts) (spip)->spd_state = (sts)
#else
#define SPI_SET_STATE(spip, sts)
#endif
/**
* @brief SPI Driver initialization.
*/
@ -53,7 +42,7 @@ void spiInit(void) {
*/
void spiObjectInit(SPIDriver *spip) {
SPI_SET_STATE(spip, SPI_IDLE);
spip->spd_state = SPI_IDLE;
#if CH_USE_MUTEXES
chMtxInit(&spip->spd_mutex);
#elif CH_USE_SEMAPHORES
@ -80,10 +69,8 @@ void spiSetup(SPIDriver *spip, const SPIConfig *config) {
/**
* @brief Asserts the chip select signal and prepares for transfers.
* @details The SPI bus is configured and a peripheral selected.
*
* @param[in] spip pointer to the @p SPIDriver object
* @param config pointer to the @p SPIConfig object
*/
void spiSelect(SPIDriver *spip) {
@ -94,7 +81,7 @@ void spiSelect(SPIDriver *spip) {
"not idle");
spi_lld_select(spip);
SPI_SET_STATE(spip, SPI_ACTIVE);
spip->spd_state = SPI_ACTIVE;
chSysUnlock();
}
@ -113,7 +100,7 @@ void spiUnselect(SPIDriver *spip) {
"not locked");
spi_lld_unselect(spip);
SPI_SET_STATE(spip, SPI_IDLE);
spip->spd_state = SPI_IDLE;
chSysUnlock();
}
@ -174,6 +161,7 @@ void spiAcquireBus(SPIDriver *spip) {
void spiReleaseBus(SPIDriver *spip) {
#if CH_USE_MUTEXES
(void)spip;
chMtxUnlock();
#elif CH_USE_SEMAPHORES
chSemSignal(&spip->spd_semaphore);

55
os/io/templates/spi_lld.c
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@ -27,5 +27,60 @@
#include <ch.h>
#include <spi.h>
/**
* @brief Low level SPI driver initialization.
*/
void spi_lld_init(void) {
}
/**
* @brief Low level SPI bus setup.
*
* @param[in] spip pointer to the @p SPIDriver object
*/
void spi_lld_setup(SPIDriver *spip) {
}
/**
* @brief Asserts the chip select signal and prepares for transfers.
*
* @param[in] spip pointer to the @p SPIDriver object
*/
void spi_lld_select(SPIDriver *spip) {
}
/**
* @brief De-asserts the chip select signal.
* @details The previously selected peripheral is unselected.
*
* @param[in] spip pointer to the @p SPIDriver object
*/
void spi_lld_unselect(SPIDriver *spip) {
}
/**
* @brief Exchanges data on the SPI bus.
* @details This function performs a simultaneous transmit/receive operation.
*
* @param[in] spip pointer to the @p SPIDriver object
* @param n number of words to be exchanged
* @param rxbuf the pointer to the receive buffer, if @p NULL is specified then
* the input data is discarded.
* Note that the buffer is organized as an uint8_t array for
* data sizes below or equal to 8 bits else it is organized as
* an uint16_t array.
* @param txbuf the pointer to the transmit buffer, if @p NULL is specified all
* ones are transmitted.
* Note that the buffer is organized as an uint8_t array for
* data sizes below or equal to 8 bits else it is organized as
* an uint16_t array.
*/
void spi_lld_exchange(SPIDriver *spip, size_t n, void *rxbuf, void *txbuf) {
}
/** @} */

2
os/io/templates/spi_lld.h
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@ -70,12 +70,10 @@ typedef struct {
* @brief Structure representing a MAC driver.
*/
typedef struct {
#if CH_DBG_ENABLE_ASSERTS || defined(__DOXYGEN__)
/**
* @brief Driver state.
*/
spistate_t spd_state;
#endif /* CH_DBG_ENABLE_ASSERTS */
#if SPI_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
#if CH_USE_MUTEXES || defined(__DOXYGEN__)
/**