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Added SPI IRQ based implementation (Still not totally tested) 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@13134 27425a3e-05d8-49a3-a47f-9c15f0e5edd8
This commit is contained in:
Rocco Marco Guglielmi 2019-10-22 08:22:46 +00:00
parent b928dda064
commit 05e2b8becc
3 changed files with 643 additions and 0 deletions
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411
os/hal/ports/ADUCM/ADUCM36x/hal_spi_lld.c Normal file
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/*
ChibiOS - Copyright (C) 2006..2018 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 ADUCM36x/hal_spi_lld.c
* @brief ADUCM SPI subsystem low level driver source.
*
* @addtogroup SPI
* @{
*/
#include "hal.h"
#if HAL_USE_SPI || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
#define ADUCM_SPI_DIV_MASK 0x003FU
#define ADUCM_SPI_STA_IRQ 0x0001U
#define ADUCM_SPI_STA_TX 0x0020U
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/** @brief SPI0 driver identifier.*/
#if ADUCM_SPI_USE_SPI0 || defined(__DOXYGEN__)
SPIDriver SPID0;
#endif
/** @brief SPI1 driver identifier.*/
#if ADUCM_SPI_USE_SPI1 || defined(__DOXYGEN__)
SPIDriver SPID1;
#endif
/*===========================================================================*/
/* Driver local variables and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Shared interrupt service routine.
*
* @param[in] spip pointer to the @p SPIDriver object
*/
static void spi_lld_serve_interrupt(SPIDriver *spip) {
uint32_t sta = spip->spi->SPISTA;
uint8_t dummy_rx;
uint8_t dummy_tx = 0xFFU;
if((sta & ADUCM_SPI_STA_TX) && (spip->size > 0)) {
/* Decreasing the size. */
(spip->size)--;
/* Retrieving the RX. */
if(spip->rxbuf != NULL) {
*(spip->rxbuf) = spip->spi->SPIRX;
(spip->rxbuf)++;
}
else {
dummy_rx = spip->spi->SPIRX;
}
/* Pushing the new TX: this will start a new transfert. */
if(spip->txbuf != NULL) {
spip->spi->SPITX = *(spip->txbuf);
(spip->txbuf)++;
}
else {
spip->spi->SPITX = dummy_tx;
}
(void)dummy_rx;
}
if(spip->size == 0) {
/* Portable SPI ISR code defined in the high level driver, note, it is
a macro.*/
_spi_isr_code(spip);
}
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
#if ADUCM_SPI_USE_SPI0 || defined(__DOXYGEN__)
#if !defined(ADUCM_SPI0_HANDLER)
#error "ADUCM_SPI0_HANDLER not defined"
#endif
/**
* @brief SPI0 interrupt handler.
*
* @isr
*/
OSAL_IRQ_HANDLER(ADUCM_SPI0_HANDLER) {
OSAL_IRQ_PROLOGUE();
spi_lld_serve_interrupt(&SPID0);
OSAL_IRQ_EPILOGUE();
}
#endif
#if ADUCM_SPI_USE_SPI1 || defined(__DOXYGEN__)
#if !defined(ADUCM_SPI1_HANDLER)
#error "ADUCM_SPI1_HANDLER not defined"
#endif
/**
* @brief SPI1 interrupt handler.
*
* @isr
*/
OSAL_IRQ_HANDLER(ADUCM_SPI1_HANDLER) {
OSAL_IRQ_PROLOGUE();
spi_lld_serve_interrupt(&SPID1);
OSAL_IRQ_EPILOGUE();
}
#endif
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level SPI driver initialization.
*
* @notapi
*/
void spi_lld_init(void) {
#if ADUCM_SPI_USE_SPI0
spiObjectInit(&SPID0);
SPID0.spi = pADI_SPI0;
SPID0.rxbuf = NULL;
SPID0.txbuf = NULL;
SPID0.size = 0;
#endif
#if ADUCM_SPI_USE_SPI1
spiObjectInit(&SPID1);
SPID1.spi = pADI_SPI1;
SPID1.rxbuf = NULL;
SPID1.txbuf = NULL;
SPID1.size = 0;
#endif
}
/**
* @brief Configures and activates the SPI peripheral.
*
* @param[in] spip pointer to the @p SPIDriver object
*
* @notapi
*/
void spi_lld_start(SPIDriver *spip) {
/* If in stopped state then enables the SPI and DMA clocks.*/
if (spip->state == SPI_STOP) {
#if ADUCM_SPI_USE_SPI0
if (&SPID0 == spip) {
/* Enabling peripheral clock branch. */
ccEnableSPI0();
/* Enabling peripheral interrupt. */
nvicEnableVector(ADUCM_SPI0_NUMBER, ADUCM_SPI_SPI0_IRQ_PRIORITY);
}
#endif
#if ADUCM_SPI_USE_SPI1
if (&SPID1 == spip) {
/* Enabling peripheral clock branch. */
ccEnableSPI1();
/* Enabling peripheral interrupt. */
nvicEnableVector(ADUCM_SPI1_NUMBER, ADUCM_SPI_SPI1_IRQ_PRIORITY);
}
#endif
}
/* SPI clock divider configuration.*/
spip->spi->SPIDIV = (spip->config->div & ADUCM_SPI_DIV_MASK);
/* SPI enabling and configuration. Note that some configuration are
enforced to ensure the IRQ proper behavior. */
spip->spi->SPICON = spip->config->con | ADUCM_SPI_CON_TIM |
ADUCM_SPI_CON_MASEN;
spip->spi->SPICON &= ~ADUCM_SPI_CON_MOD_MASK;
spip->spi->SPICON |= ADUCM_SPI_CON_ENABLE;
}
/**
* @brief Deactivates the SPI peripheral.
*
* @param[in] spip pointer to the @p SPIDriver object
*
* @notapi
*/
void spi_lld_stop(SPIDriver *spip) {
/* If in ready state then disables the SPI clock.*/
if (spip->state == SPI_READY) {
/* SPI disable.*/
spip->spi->SPICON &= ~ADUCM_SPI_CON_ENABLE;
spip->spi->SPICON = 0;
spip->spi->SPIDIV = 0;
spip->rxbuf = NULL;
spip->txbuf = NULL;
spip->size = 0;
#if ADUCM_SPI_USE_SPI0
if (&SPID0 == spip)
ccDisableSPI0();
#endif
#if ADUCM_SPI_USE_SPI1
if (&SPID1 == spip)
ccDisableSPI1();
#endif
}
}
#if (SPI_SELECT_MODE == SPI_SELECT_MODE_LLD) || defined(__DOXYGEN__)
/**
* @brief Asserts the slave select signal and prepares for transfers.
*
* @param[in] spip pointer to the @p SPIDriver object
*
* @notapi
*/
void spi_lld_select(SPIDriver *spip) {
/* No implementation on ADUCM.*/
}
/**
* @brief Deasserts the slave select signal.
* @details The previously selected peripheral is unselected.
*
* @param[in] spip pointer to the @p SPIDriver object
*
* @notapi
*/
void spi_lld_unselect(SPIDriver *spip) {
/* No implementation on ADUCM.*/
}
#endif
/**
* @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.
* @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
*
* @notapi
*/
void spi_lld_ignore(SPIDriver *spip, size_t n) {
uint8_t dummy_tx = 0xFFU;
spip->txbuf = NULL;
spip->rxbuf = NULL;
spip->size = n;
spip->spi->SPITX = dummy_tx;
}
/**
* @brief Exchanges data on the SPI bus.
* @details This asynchronous function starts a simultaneous transmit/receive
* operation.
* @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
*
* @notapi
*/
void spi_lld_exchange(SPIDriver *spip, size_t n,
const void *txbuf, void *rxbuf) {
spip->txbuf = (uint8_t*)txbuf;
spip->rxbuf = (uint8_t*)rxbuf;
spip->size = n;
spip->spi->SPITX = *(spip->txbuf);
}
/**
* @brief Sends data over the SPI bus.
* @details This asynchronous function starts a transmit operation.
* @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
*
* @notapi
*/
void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf) {
spip->txbuf = (uint8_t*)txbuf;
spip->rxbuf = NULL;
spip->size = n;
spip->spi->SPITX = *(spip->txbuf);
}
/**
* @brief Receives data from the SPI bus.
* @details This asynchronous function starts a receive operation.
* @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
*
* @notapi
*/
void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf) {
uint8_t dummy_tx = 0xFFU;
spip->txbuf = NULL;
spip->rxbuf = (uint8_t*) rxbuf;
spip->size = n;
spip->spi->SPITX = dummy_tx;
}
/**
* @brief Exchanges one frame using a polled wait.
* @details This synchronous function exchanges one frame using a polled
* synchronization method. This function is useful when exchanging
* small amount of data on high speed channels, usually in this
* situation is much more efficient just wait for completion using
* polling than suspending the thread waiting for an interrupt.
*
* @param[in] spip pointer to the @p SPIDriver object
* @param[in] frame the data frame to send over the SPI bus
* @return The received data frame from the SPI bus.
*/
uint8_t spi_lld_polled_exchange(SPIDriver *spip, uint8_t frame) {
uint32_t sta = spip->spi->SPISTA;
#if ADUCM_SPI_USE_SPI0
if (&SPID0 == spip) {
/* Disabling ISR. */
nvicDisableVector(ADUCM_SPI0_NUMBER);
}
#endif
#if ADUCM_SPI_USE_SPI1
if (&SPID1 == spip) {
/* Disabling ISR. */
nvicDisableVector(ADUCM_SPI1_NUMBER);
}
#endif
spip->spi->SPITX = frame;
while((sta & (ADUCM_SPI_STA_TX | ADUCM_SPI_STA_IRQ))) {
sta = spip->spi->SPISTA;
}
#if ADUCM_SPI_USE_SPI0
if (&SPID0 == spip) {
/* Re-enabling peripheral interrupt. */
nvicEnableVector(ADUCM_SPI0_NUMBER, ADUCM_SPI_SPI0_IRQ_PRIORITY);
}
#endif
#if ADUCM_SPI_USE_SPI1
if (&SPID1 == spip) {
/* Re-enabling peripheral interrupt. */
nvicEnableVector(ADUCM_SPI1_NUMBER, ADUCM_SPI_SPI1_IRQ_PRIORITY);
}
#endif
return spip->spi->SPIRX;
}
#endif /* HAL_USE_SPI */
/** @} */

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os/hal/ports/ADUCM/ADUCM36x/hal_spi_lld.h Normal file
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/*
ChibiOS - Copyright (C) 2006..2018 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 ADUCM36x/hal_spi_lld.h
* @brief ADUCM SPI subsystem low level driver header.
*
* @addtogroup SPI
* @{
*/
#ifndef HAL_SPI_LLD_H
#define HAL_SPI_LLD_H
#if HAL_USE_SPI || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/**
* @brief Circular mode support flag.
*/
#define SPI_SUPPORTS_CIRCULAR FALSE
/**
* @name Register helpers not found in ADI headers
* @{
*/
#define ADUCM_SPI_CON_ENABLE 0x0001U
#define ADUCM_SPI_CON_MASEN 0x0002U
#define ADUCM_SPI_CON_CPHA 0x0004U
#define ADUCM_SPI_CON_CPOL 0x0008U
#define ADUCM_SPI_CON_WOM 0x0010U
#define ADUCM_SPI_CON_LSB 0x0020U
#define ADUCM_SPI_CON_TIM 0x0040U
#define ADUCM_SPI_CON_ZEN 0x0080U
#define ADUCM_SPI_CON_RXOF 0x0100U
#define ADUCM_SPI_CON_OEN 0x0200U
#define ADUCM_SPI_CON_LOOPBACK 0x0400U
#define ADUCM_SPI_CON_CON 0x0800U
#define ADUCM_SPI_CON_RFLUSH 0x1000U
#define ADUCM_SPI_CON_TFLUSH 0x2000U
#define ADUCM_SPI_CON_MOD_MASK 0xC000U
#define ADUCM_SPI_CON_MOD_TX1RX1 0x0000U
#define ADUCM_SPI_CON_MOD_TX2RX2 0x4000U
#define ADUCM_SPI_CON_MOD_TX3RX3 0x8000U
#define ADUCM_SPI_CON_MOD_TX4RX4 0xC000U
#define ADUCM_SPI_DIV_0 0x0001U
#define ADUCM_SPI_DIV_1 0x0002U
#define ADUCM_SPI_DIV_2 0x0004U
#define ADUCM_SPI_DIV_3 0x0008U
#define ADUCM_SPI_DIV_4 0x00F0U
/** @} */
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @name Configuration options
* @{
*/
/**
* @brief SPI0 driver enable switch.
* @details If set to @p TRUE the support for SPI0 is included.
* @note The default is @p FALSE.
*/
#if !defined(ADUCM_SPI_USE_SPI0) || defined(__DOXYGEN__)
#define ADUCM_SPI_USE_SPI0 FALSE
#endif
/**
* @brief SPI1 driver enable switch.
* @details If set to @p TRUE the support for SPI1 is included.
* @note The default is @p FALSE.
*/
#if !defined(ADUCM_SPI_USE_SPI1) || defined(__DOXYGEN__)
#define ADUCM_SPI_USE_SPI1 FALSE
#endif
/**
* @brief SPI0 interrupt priority level setting.
*/
#if !defined(ADUCM_SPI_SPI0_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define ADUCM_SPI_SPI0_IRQ_PRIORITY 5
#endif
/**
* @brief SPI1 interrupt priority level setting.
*/
#if !defined(ADUCM_SPI_SPI1_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define ADUCM_SPI_SPI1_IRQ_PRIORITY 5
#endif
/**
* @brief Enable SPI DMA support
*/
#if !defined(ADUCM_SPI_USE_DMA) || defined(__DOXYGEN__)
#define ADUCM_SPI_USE_DMA FALSE
#endif
/** @} */
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if !ADUCM_SPI_USE_SPI0 && !ADUCM_SPI_USE_SPI1
#error "SPI driver activated but no SPI peripheral assigned"
#endif
#if ADUCM_SPI_USE_SPI0 && \
!OSAL_IRQ_IS_VALID_PRIORITY(ADUCM_SPI_SPI0_IRQ_PRIORITY)
#error "Invalid IRQ priority assigned to SPI0"
#endif
#if ADUCM_SPI_USE_SPI1 && \
!OSAL_IRQ_IS_VALID_PRIORITY(ADUCM_SPI_SPI1_IRQ_PRIORITY)
#error "Invalid IRQ priority assigned to SPI1"
#endif
#if ADUCM_SPI_USE_DMA
#error "ADuCM SPI driver implementation does not supports DMA yet."
#endif
#if ADUCM_SPI_USE_DMA && ADUCM_SPI_USE_SPI0
#error "ADuCM SPI0 does not supports DMA."
#endif
#if (ADUCM_SPI_USE_DMA == TRUE) && !defined(ADUCM_DMA_REQUIRED)
#define ADUCM_DMA_REQUIRED
#endif
#if (SPI_USE_CIRCULAR == TRUE) && (SPI_SUPPORTS_CIRCULAR == FALSE)
#error "ADuCM SPI does not support circular mode."
#endif
#if SPI_SELECT_MODE == SPI_SELECT_MODE_LLD
#error "SPI_SELECT_MODE_LLD not supported by this driver"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @brief Low level fields of the SPI driver structure.
*/
#if ADUCM_SPI_USE_DMA
#define spi_lld_driver_fields \
/* Empty placeholder for DMA based implementation. */
#else
#define spi_lld_driver_fields \
/* Pointer to the SPIx registers block.*/ \
ADI_SPI_TypeDef *spi; \
/* Receive buffer pointer.*/ \
uint8_t *rxbuf; \
/* Transmission buffer pointer.*/ \
uint8_t *txbuf; \
/* Transfert size.*/ \
uint32_t size;
#endif /* ADUCM_SPI_USE_DMA */
/**
* @brief Low level fields of the SPI configuration structure.
*/
#define spi_lld_config_fields \
/* SPIxCON register initialization data.*/ \
uint16_t con; \
/* SPIxDIV register initialization data.*/ \
uint16_t div
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if ADUCM_SPI_USE_SPI0 && !defined(__DOXYGEN__)
extern SPIDriver SPID0;
#endif
#if ADUCM_SPI_USE_SPI1 && !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);
#if (SPI_SELECT_MODE == SPI_SELECT_MODE_LLD) || defined(__DOXYGEN__)
void spi_lld_select(SPIDriver *spip);
void spi_lld_unselect(SPIDriver *spip);
#endif
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);
#if (SPI_SUPPORTS_CIRCULAR == TRUE) || defined(__DOXYGEN__)
void spi_lld_abort(SPIDriver *spip);
#endif
uint8_t spi_lld_polled_exchange(SPIDriver *spip, uint8_t frame);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_SPI */
#endif /* HAL_SPI_LLD_H */
/** @} */

1
os/hal/ports/ADUCM/ADUCM36x/platform.mk
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@ -4,6 +4,7 @@ PLATFORMSRC := $(CHIBIOS)/os/hal/ports/common/ARMCMx/nvic.c \
$(CHIBIOS)/os/hal/ports/ADUCM/ADUCM36x/hal_lld.c \ $(CHIBIOS)/os/hal/ports/ADUCM/ADUCM36x/hal_lld.c \
$(CHIBIOS)/os/hal/ports/ADUCM/ADUCM36x/hal_pal_lld.c \ $(CHIBIOS)/os/hal/ports/ADUCM/ADUCM36x/hal_pal_lld.c \
$(CHIBIOS)/os/hal/ports/ADUCM/ADUCM36x/hal_serial_lld.c \ $(CHIBIOS)/os/hal/ports/ADUCM/ADUCM36x/hal_serial_lld.c \
$(CHIBIOS)/os/hal/ports/ADUCM/ADUCM36x/hal_spi_lld.c \
$(CHIBIOS)/os/hal/ports/ADUCM/ADUCM36x/hal_st_lld.c $(CHIBIOS)/os/hal/ports/ADUCM/ADUCM36x/hal_st_lld.c
# Required include directories. # Required include directories.