/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 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 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. */
/*===========================================================================*/
/*===========================================================================*/
/* 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_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_unselect(spip);
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_USE_MUTEXES
chMtxLock(&spip->mutex);
#elif CH_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_USE_MUTEXES
(void)spip;
chMtxUnlock();
#elif CH_USE_SEMAPHORES
chSemSignal(&spip->semaphore);
#endif
}
#endif /* SPI_USE_MUTUAL_EXCLUSION */
#endif /* HAL_USE_SPI */
/** @} */
32' href='#n332'>332
333
334
/*
ChibiOS - Copyright (C) 2006..2015 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 templates/halconf.h
* @brief HAL configuration header.
* @details HAL configuration file, this file allows to enable or disable the
* various device drivers from your application. You may also use
* this file in order to override the device drivers default settings.
*
* @addtogroup HAL_CONF
* @{
*/
#ifndef _HALCONF_H_
#define _HALCONF_H_
#include "mcuconf.h"
/**
* @brief Enables the PAL subsystem.
*/
#if !defined(HAL_USE_PAL) || defined(__DOXYGEN__)
#define HAL_USE_PAL TRUE
#endif
/**
* @brief Enables the ADC subsystem.
*/
#if !defined(HAL_USE_ADC) || defined(__DOXYGEN__)
#define HAL_USE_ADC FALSE
#endif
/**
* @brief Enables the CAN subsystem.
*/
#if !defined(HAL_USE_CAN) || defined(__DOXYGEN__)
#define HAL_USE_CAN FALSE
#endif
/**
* @brief Enables the DAC subsystem.
*/
#if !defined(HAL_USE_DAC) || defined(__DOXYGEN__)
#define HAL_USE_DAC FALSE
#endif
/**
* @brief Enables the EXT subsystem.
*/
#if !defined(HAL_USE_EXT) || defined(__DOXYGEN__)
#define HAL_USE_EXT FALSE
#endif
/**
* @brief Enables the GPT subsystem.
*/
#if !defined(HAL_USE_GPT) || defined(__DOXYGEN__)
#define HAL_USE_GPT FALSE
#endif
/**
* @brief Enables the I2C subsystem.
*/
#if !defined(HAL_USE_I2C) || defined(__DOXYGEN__)
#define HAL_USE_I2C FALSE
#endif
/**
* @brief Enables the I2S subsystem.
*/
#if !defined(HAL_USE_I2S) || defined(__DOXYGEN__)
#define HAL_USE_I2S FALSE
#endif
/**
* @brief Enables the ICU subsystem.
*/
#if !defined(HAL_USE_ICU) || defined(__DOXYGEN__)
#define HAL_USE_ICU FALSE
#endif
/**
* @brief Enables the MAC subsystem.
*/
#if !defined(HAL_USE_MAC) || defined(__DOXYGEN__)
#define HAL_USE_MAC FALSE
#endif
/**
* @brief Enables the MMC_SPI subsystem.
*/
#if !defined(HAL_USE_MMC_SPI) || defined(__DOXYGEN__)
#define HAL_USE_MMC_SPI FALSE
#endif
/**
* @brief Enables the PWM subsystem.
*/
#if !defined(HAL_USE_PWM) || defined(__DOXYGEN__)
#define HAL_USE_PWM FALSE
#endif
/**
* @brief Enables the RTC subsystem.
*/
#if !defined(HAL_USE_RTC) || defined(__DOXYGEN__)
#define HAL_USE_RTC FALSE
#endif
/**
* @brief Enables the SDC subsystem.
*/
#if !defined(HAL_USE_SDC) || defined(__DOXYGEN__)
#define HAL_USE_SDC FALSE
#endif
/**
* @brief Enables the SERIAL subsystem.
*/
#if !defined(HAL_USE_SERIAL) || defined(__DOXYGEN__)
#define HAL_USE_SERIAL FALSE
#endif
/**
* @brief Enables the SERIAL over USB subsystem.
*/
#if !defined(HAL_USE_SERIAL_USB) || defined(__DOXYGEN__)
#define HAL_USE_SERIAL_USB FALSE
#endif
/**
* @brief Enables the SPI subsystem.
*/
#if !defined(HAL_USE_SPI) || defined(__DOXYGEN__)
#define HAL_USE_SPI TRUE
#endif
/**
* @brief Enables the UART subsystem.
*/
#if !defined(HAL_USE_UART) || defined(__DOXYGEN__)
#define HAL_USE_UART FALSE
#endif
/**
* @brief Enables the USB subsystem.
*/
#if !defined(HAL_USE_USB) || defined(__DOXYGEN__)
#define HAL_USE_USB FALSE
#endif
/*===========================================================================*/
/* ADC driver related settings. */
/*===========================================================================*/
/**
* @brief Enables synchronous APIs.
* @note Disabling this option saves both code and data space.
*/
#if !defined(ADC_USE_WAIT) || defined(__DOXYGEN__)
#define ADC_USE_WAIT TRUE
#endif
/**
* @brief Enables the @p adcAcquireBus() and @p adcReleaseBus() APIs.
* @note Disabling this option saves both code and data space.
*/
#if !defined(ADC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
#define ADC_USE_MUTUAL_EXCLUSION TRUE
#endif
/*===========================================================================*/
/* CAN driver related settings. */
/*===========================================================================*/
/**
* @brief Sleep mode related APIs inclusion switch.
*/
#if !defined(CAN_USE_SLEEP_MODE) || defined(__DOXYGEN__)
#define CAN_USE_SLEEP_MODE TRUE
#endif
/*===========================================================================*/
/* I2C driver related settings. */
/*===========================================================================*/
/**
* @brief Enables the mutual exclusion APIs on the I2C bus.
*/
#if !defined(I2C_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
#define I2C_USE_MUTUAL_EXCLUSION TRUE
#endif
/*===========================================================================*/
/* MAC driver related settings. */
/*===========================================================================*/
/**
* @brief Enables an event sources for incoming packets.
*/
#if !defined(MAC_USE_ZERO_COPY) || defined(__DOXYGEN__)
#define MAC_USE_ZERO_COPY FALSE
#endif
/**
* @brief Enables an event sources for incoming packets.
*/
#if !defined(MAC_USE_EVENTS) || defined(__DOXYGEN__)
#define MAC_USE_EVENTS TRUE
#endif
/*===========================================================================*/
/* MMC_SPI driver related settings. */
/*===========================================================================*/
/**
* @brief Delays insertions.
* @details If enabled this options inserts delays into the MMC waiting
* routines releasing some extra CPU time for the threads with
* lower priority, this may slow down the driver a bit however.
* This option is recommended also if the SPI driver does not
* use a DMA channel and heavily loads the CPU.
*/
#if !defined(MMC_NICE_WAITING) || defined(__DOXYGEN__)
#define MMC_NICE_WAITING TRUE
#endif
/*===========================================================================*/
/* SDC driver related settings. */
/*===========================================================================*/
/**
* @brief Number of initialization attempts before rejecting the card.
* @note Attempts are performed at 10mS intervals.
*/
#if !defined(SDC_INIT_RETRY) || defined(__DOXYGEN__)
#define SDC_INIT_RETRY 100
#endif
/**
* @brief Include support for MMC cards.
* @note MMC support is not yet implemented so this option must be kept
* at @p FALSE.
*/
#if !defined(SDC_MMC_SUPPORT) || defined(__DOXYGEN__)
#define SDC_MMC_SUPPORT FALSE
#endif
/**
* @brief Delays insertions.
* @details If enabled this options inserts delays into the MMC waiting
* routines releasing some extra CPU time for the threads with
* lower priority, this may slow down the driver a bit however.
*/
#if !defined(SDC_NICE_WAITING) || defined(__DOXYGEN__)
#define SDC_NICE_WAITING TRUE
#endif
/*===========================================================================*/
/* SERIAL driver related settings. */
/*===========================================================================*/
/**
* @brief Default bit rate.
* @details Configuration parameter, this is the baud rate selected for the
* default configuration.
*/
#if !defined(SERIAL_DEFAULT_BITRATE) || defined(__DOXYGEN__)
#define SERIAL_DEFAULT_BITRATE 38400
#endif
/**
* @brief Serial buffers size.
* @details Configuration parameter, you can change the depth of the queue
* buffers depending on the requirements of your application.
* @note The default is 64 bytes for both the transmission and receive
* buffers.
*/
#if !defined(SERIAL_BUFFERS_SIZE) || defined(__DOXYGEN__)
#define SERIAL_BUFFERS_SIZE 16
#endif
/*===========================================================================*/
/* SERIAL_USB driver related setting. */
/*===========================================================================*/
/**
* @brief Serial over USB buffers size.
* @details Configuration parameter, the buffer size must be a multiple of
* the USB data endpoint maximum packet size.
* @note The default is 64 bytes for both the transmission and receive
* buffers.
*/
#if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)
#define SERIAL_USB_BUFFERS_SIZE 256
#endif
/*===========================================================================*/
/* SPI driver related settings. */
/*===========================================================================*/
/**
* @brief Enables synchronous APIs.
* @note Disabling this option saves both code and data space.
*/
#if !defined(SPI_USE_WAIT) || defined(__DOXYGEN__)
#define SPI_USE_WAIT TRUE
#endif
/**
* @brief Enables the @p spiAcquireBus() and @p spiReleaseBus() APIs.
* @note Disabling this option saves both code and data space.
*/
#if !defined(SPI_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
#define SPI_USE_MUTUAL_EXCLUSION TRUE
#endif
#endif /* _HALCONF_H_ */
/** @} */
|