diff options
| author | Giovanni Di Sirio <gdisirio@gmail.com> | 2016-04-02 08:31:39 +0000 |
|---|---|---|
| committer | Giovanni Di Sirio <gdisirio@gmail.com> | 2016-04-02 08:31:39 +0000 |
| commit | a84c32523cb971505e03ae73409839637d8706a9 (patch) | |
| tree | 0fbdac64cba70108c3a6106e137cef741e1901ba /os/hal/ports/STM32/LLD/SPIv1/spi_lld.c | |
| parent | f905d498c81714e5c846529a441ef6977908d39f (diff) | |
| download | ChibiOS-a84c32523cb971505e03ae73409839637d8706a9.tar.gz ChibiOS-a84c32523cb971505e03ae73409839637d8706a9.tar.bz2 ChibiOS-a84c32523cb971505e03ae73409839637d8706a9.zip | |
STM32 LLD renaming done.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9208 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/ports/STM32/LLD/SPIv1/spi_lld.c')
| -rw-r--r-- | os/hal/ports/STM32/LLD/SPIv1/spi_lld.c | 633 |
1 files changed, 0 insertions, 633 deletions
diff --git a/os/hal/ports/STM32/LLD/SPIv1/spi_lld.c b/os/hal/ports/STM32/LLD/SPIv1/spi_lld.c deleted file mode 100644 index b21faf364..000000000 --- a/os/hal/ports/STM32/LLD/SPIv1/spi_lld.c +++ /dev/null @@ -1,633 +0,0 @@ -/*
- 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 STM32/SPIv1/spi_lld.c
- * @brief STM32 SPI subsystem low level driver source.
- *
- * @addtogroup SPI
- * @{
- */
-
-#include "hal.h"
-
-#if HAL_USE_SPI || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-#define SPI1_RX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI1_RX_DMA_STREAM, \
- STM32_SPI1_RX_DMA_CHN)
-
-#define SPI1_TX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI1_TX_DMA_STREAM, \
- STM32_SPI1_TX_DMA_CHN)
-
-#define SPI2_RX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI2_RX_DMA_STREAM, \
- STM32_SPI2_RX_DMA_CHN)
-
-#define SPI2_TX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI2_TX_DMA_STREAM, \
- STM32_SPI2_TX_DMA_CHN)
-
-#define SPI3_RX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI3_RX_DMA_STREAM, \
- STM32_SPI3_RX_DMA_CHN)
-
-#define SPI3_TX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI3_TX_DMA_STREAM, \
- STM32_SPI3_TX_DMA_CHN)
-
-#define SPI4_RX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI4_RX_DMA_STREAM, \
- STM32_SPI4_RX_DMA_CHN)
-
-#define SPI4_TX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI4_TX_DMA_STREAM, \
- STM32_SPI4_TX_DMA_CHN)
-
-#define SPI5_RX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI5_RX_DMA_STREAM, \
- STM32_SPI5_RX_DMA_CHN)
-
-#define SPI5_TX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI5_TX_DMA_STREAM, \
- STM32_SPI5_TX_DMA_CHN)
-
-#define SPI6_RX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI6_RX_DMA_STREAM, \
- STM32_SPI6_RX_DMA_CHN)
-
-#define SPI6_TX_DMA_CHANNEL \
- STM32_DMA_GETCHANNEL(STM32_SPI_SPI6_TX_DMA_STREAM, \
- STM32_SPI6_TX_DMA_CHN)
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/** @brief SPI1 driver identifier.*/
-#if STM32_SPI_USE_SPI1 || defined(__DOXYGEN__)
-SPIDriver SPID1;
-#endif
-
-/** @brief SPI2 driver identifier.*/
-#if STM32_SPI_USE_SPI2 || defined(__DOXYGEN__)
-SPIDriver SPID2;
-#endif
-
-/** @brief SPI3 driver identifier.*/
-#if STM32_SPI_USE_SPI3 || defined(__DOXYGEN__)
-SPIDriver SPID3;
-#endif
-
-/** @brief SPI4 driver identifier.*/
-#if STM32_SPI_USE_SPI4 || defined(__DOXYGEN__)
-SPIDriver SPID4;
-#endif
-
-/** @brief SPI5 driver identifier.*/
-#if STM32_SPI_USE_SPI5 || defined(__DOXYGEN__)
-SPIDriver SPID5;
-#endif
-
-/** @brief SPI6 driver identifier.*/
-#if STM32_SPI_USE_SPI6 || defined(__DOXYGEN__)
-SPIDriver SPID6;
-#endif
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-static const uint16_t dummytx = 0xFFFFU;
-static uint16_t dummyrx;
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @brief Shared end-of-rx service routine.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] flags pre-shifted content of the ISR register
- */
-static void spi_lld_serve_rx_interrupt(SPIDriver *spip, uint32_t flags) {
-
- /* DMA errors handling.*/
-#if defined(STM32_SPI_DMA_ERROR_HOOK)
- if ((flags & (STM32_DMA_ISR_TEIF | STM32_DMA_ISR_DMEIF)) != 0) {
- STM32_SPI_DMA_ERROR_HOOK(spip);
- }
-#else
- (void)flags;
-#endif
-
- /* Stop everything.*/
- dmaStreamDisable(spip->dmatx);
- dmaStreamDisable(spip->dmarx);
-
- /* Portable SPI ISR code defined in the high level driver, note, it is
- a macro.*/
- _spi_isr_code(spip);
-}
-
-/**
- * @brief Shared end-of-tx service routine.
- *
- * @param[in] spip pointer to the @p SPIDriver object
- * @param[in] flags pre-shifted content of the ISR register
- */
-static void spi_lld_serve_tx_interrupt(SPIDriver *spip, uint32_t flags) {
-
- /* DMA errors handling.*/
-#if defined(STM32_SPI_DMA_ERROR_HOOK)
- (void)spip;
- if ((flags & (STM32_DMA_ISR_TEIF | STM32_DMA_ISR_DMEIF)) != 0) {
- STM32_SPI_DMA_ERROR_HOOK(spip);
- }
-#else
- (void)spip;
- (void)flags;
-#endif
-}
-
-/*===========================================================================*/
-/* Driver interrupt handlers. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief Low level SPI driver initialization.
- *
- * @notapi
- */
-void spi_lld_init(void) {
-
-#if STM32_SPI_USE_SPI1
- spiObjectInit(&SPID1);
- SPID1.spi = SPI1;
- SPID1.dmarx = STM32_DMA_STREAM(STM32_SPI_SPI1_RX_DMA_STREAM);
- SPID1.dmatx = STM32_DMA_STREAM(STM32_SPI_SPI1_TX_DMA_STREAM);
- SPID1.rxdmamode = STM32_DMA_CR_CHSEL(SPI1_RX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI1_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_P2M |
- STM32_DMA_CR_TCIE |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
- SPID1.txdmamode = STM32_DMA_CR_CHSEL(SPI1_TX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI1_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_M2P |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
-#endif
-
-#if STM32_SPI_USE_SPI2
- spiObjectInit(&SPID2);
- SPID2.spi = SPI2;
- SPID2.dmarx = STM32_DMA_STREAM(STM32_SPI_SPI2_RX_DMA_STREAM);
- SPID2.dmatx = STM32_DMA_STREAM(STM32_SPI_SPI2_TX_DMA_STREAM);
- SPID2.rxdmamode = STM32_DMA_CR_CHSEL(SPI2_RX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI2_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_P2M |
- STM32_DMA_CR_TCIE |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
- SPID2.txdmamode = STM32_DMA_CR_CHSEL(SPI2_TX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI2_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_M2P |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
-#endif
-
-#if STM32_SPI_USE_SPI3
- spiObjectInit(&SPID3);
- SPID3.spi = SPI3;
- SPID3.dmarx = STM32_DMA_STREAM(STM32_SPI_SPI3_RX_DMA_STREAM);
- SPID3.dmatx = STM32_DMA_STREAM(STM32_SPI_SPI3_TX_DMA_STREAM);
- SPID3.rxdmamode = STM32_DMA_CR_CHSEL(SPI3_RX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI3_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_P2M |
- STM32_DMA_CR_TCIE |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
- SPID3.txdmamode = STM32_DMA_CR_CHSEL(SPI3_TX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI3_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_M2P |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
-#endif
-
-#if STM32_SPI_USE_SPI4
- spiObjectInit(&SPID4);
- SPID4.spi = SPI4;
- SPID4.dmarx = STM32_DMA_STREAM(STM32_SPI_SPI4_RX_DMA_STREAM);
- SPID4.dmatx = STM32_DMA_STREAM(STM32_SPI_SPI4_TX_DMA_STREAM);
- SPID4.rxdmamode = STM32_DMA_CR_CHSEL(SPI4_RX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI4_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_P2M |
- STM32_DMA_CR_TCIE |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
- SPID4.txdmamode = STM32_DMA_CR_CHSEL(SPI4_TX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI4_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_M2P |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
-#endif
-
-#if STM32_SPI_USE_SPI5
- spiObjectInit(&SPID5);
- SPID5.spi = SPI5;
- SPID5.dmarx = STM32_DMA_STREAM(STM32_SPI_SPI5_RX_DMA_STREAM);
- SPID5.dmatx = STM32_DMA_STREAM(STM32_SPI_SPI5_TX_DMA_STREAM);
- SPID5.rxdmamode = STM32_DMA_CR_CHSEL(SPI5_RX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI5_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_P2M |
- STM32_DMA_CR_TCIE |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
- SPID5.txdmamode = STM32_DMA_CR_CHSEL(SPI5_TX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI5_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_M2P |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
-#endif
-
-#if STM32_SPI_USE_SPI6
- spiObjectInit(&SPID6);
- SPID6.spi = SPI6;
- SPID6.dmarx = STM32_DMA_STREAM(STM32_SPI_SPI6_RX_DMA_STREAM);
- SPID6.dmatx = STM32_DMA_STREAM(STM32_SPI_SPI6_TX_DMA_STREAM);
- SPID6.rxdmamode = STM32_DMA_CR_CHSEL(SPI6_RX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI6_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_P2M |
- STM32_DMA_CR_TCIE |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
- SPID6.txdmamode = STM32_DMA_CR_CHSEL(SPI6_TX_DMA_CHANNEL) |
- STM32_DMA_CR_PL(STM32_SPI_SPI6_DMA_PRIORITY) |
- STM32_DMA_CR_DIR_M2P |
- STM32_DMA_CR_DMEIE |
- STM32_DMA_CR_TEIE;
-#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 STM32_SPI_USE_SPI1
- if (&SPID1 == spip) {
- bool b;
- b = dmaStreamAllocate(spip->dmarx,
- STM32_SPI_SPI1_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_rx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- b = dmaStreamAllocate(spip->dmatx,
- STM32_SPI_SPI1_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_tx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- rccEnableSPI1(FALSE);
- }
-#endif
-#if STM32_SPI_USE_SPI2
- if (&SPID2 == spip) {
- bool b;
- b = dmaStreamAllocate(spip->dmarx,
- STM32_SPI_SPI2_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_rx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- b = dmaStreamAllocate(spip->dmatx,
- STM32_SPI_SPI2_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_tx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- rccEnableSPI2(FALSE);
- }
-#endif
-#if STM32_SPI_USE_SPI3
- if (&SPID3 == spip) {
- bool b;
- b = dmaStreamAllocate(spip->dmarx,
- STM32_SPI_SPI3_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_rx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- b = dmaStreamAllocate(spip->dmatx,
- STM32_SPI_SPI3_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_tx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- rccEnableSPI3(FALSE);
- }
-#endif
-#if STM32_SPI_USE_SPI4
- if (&SPID4 == spip) {
- bool b;
- b = dmaStreamAllocate(spip->dmarx,
- STM32_SPI_SPI4_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_rx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- b = dmaStreamAllocate(spip->dmatx,
- STM32_SPI_SPI4_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_tx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- rccEnableSPI4(FALSE);
- }
-#endif
-#if STM32_SPI_USE_SPI5
- if (&SPID5 == spip) {
- bool b;
- b = dmaStreamAllocate(spip->dmarx,
- STM32_SPI_SPI5_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_rx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- b = dmaStreamAllocate(spip->dmatx,
- STM32_SPI_SPI5_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_tx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- rccEnableSPI5(FALSE);
- }
-#endif
-#if STM32_SPI_USE_SPI6
- if (&SPID6 == spip) {
- bool b;
- b = dmaStreamAllocate(spip->dmarx,
- STM32_SPI_SPI6_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_rx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- b = dmaStreamAllocate(spip->dmatx,
- STM32_SPI_SPI6_IRQ_PRIORITY,
- (stm32_dmaisr_t)spi_lld_serve_tx_interrupt,
- (void *)spip);
- osalDbgAssert(!b, "stream already allocated");
- rccEnableSPI6(FALSE);
- }
-#endif
-
- /* DMA setup.*/
- dmaStreamSetPeripheral(spip->dmarx, &spip->spi->DR);
- dmaStreamSetPeripheral(spip->dmatx, &spip->spi->DR);
- }
-
- /* Configuration-specific DMA setup.*/
- if ((spip->config->cr1 & SPI_CR1_DFF) == 0) {
- /* Frame width is 8 bits or smaller.*/
- spip->rxdmamode = (spip->rxdmamode & ~STM32_DMA_CR_SIZE_MASK) |
- STM32_DMA_CR_PSIZE_BYTE | STM32_DMA_CR_MSIZE_BYTE;
- spip->txdmamode = (spip->txdmamode & ~STM32_DMA_CR_SIZE_MASK) |
- STM32_DMA_CR_PSIZE_BYTE | STM32_DMA_CR_MSIZE_BYTE;
- }
- else {
- /* Frame width is larger than 8 bits.*/
- spip->rxdmamode = (spip->rxdmamode & ~STM32_DMA_CR_SIZE_MASK) |
- STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD;
- spip->txdmamode = (spip->txdmamode & ~STM32_DMA_CR_SIZE_MASK) |
- STM32_DMA_CR_PSIZE_HWORD | STM32_DMA_CR_MSIZE_HWORD;
- }
- /* SPI setup and enable.*/
- spip->spi->CR1 = 0;
- spip->spi->CR1 = spip->config->cr1 | SPI_CR1_MSTR | SPI_CR1_SSM |
- SPI_CR1_SSI;
- spip->spi->CR2 = SPI_CR2_SSOE | SPI_CR2_RXDMAEN | SPI_CR2_TXDMAEN;
- spip->spi->CR1 |= SPI_CR1_SPE;
-}
-
-/**
- * @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->CR1 = 0;
- spip->spi->CR2 = 0;
- dmaStreamRelease(spip->dmarx);
- dmaStreamRelease(spip->dmatx);
-
-#if STM32_SPI_USE_SPI1
- if (&SPID1 == spip)
- rccDisableSPI1(FALSE);
-#endif
-#if STM32_SPI_USE_SPI2
- if (&SPID2 == spip)
- rccDisableSPI2(FALSE);
-#endif
-#if STM32_SPI_USE_SPI3
- if (&SPID3 == spip)
- rccDisableSPI3(FALSE);
-#endif
-#if STM32_SPI_USE_SPI4
- if (&SPID4 == spip)
- rccDisableSPI4(FALSE);
-#endif
-#if STM32_SPI_USE_SPI5
- if (&SPID5 == spip)
- rccDisableSPI5(FALSE);
-#endif
-#if STM32_SPI_USE_SPI6
- if (&SPID6 == spip)
- rccDisableSPI6(FALSE);
-#endif
- }
-}
-
-/**
- * @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) {
-
- palClearPad(spip->config->ssport, spip->config->sspad);
-}
-
-/**
- * @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) {
-
- palSetPad(spip->config->ssport, spip->config->sspad);
-}
-
-/**
- * @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) {
-
- dmaStreamSetMemory0(spip->dmarx, &dummyrx);
- dmaStreamSetTransactionSize(spip->dmarx, n);
- dmaStreamSetMode(spip->dmarx, spip->rxdmamode);
-
- dmaStreamSetMemory0(spip->dmatx, &dummytx);
- dmaStreamSetTransactionSize(spip->dmatx, n);
- dmaStreamSetMode(spip->dmatx, spip->txdmamode);
-
- dmaStreamEnable(spip->dmarx);
- dmaStreamEnable(spip->dmatx);
-}
-
-/**
- * @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) {
-
- dmaStreamSetMemory0(spip->dmarx, rxbuf);
- dmaStreamSetTransactionSize(spip->dmarx, n);
- dmaStreamSetMode(spip->dmarx, spip->rxdmamode| STM32_DMA_CR_MINC);
-
- dmaStreamSetMemory0(spip->dmatx, txbuf);
- dmaStreamSetTransactionSize(spip->dmatx, n);
- dmaStreamSetMode(spip->dmatx, spip->txdmamode | STM32_DMA_CR_MINC);
-
- dmaStreamEnable(spip->dmarx);
- dmaStreamEnable(spip->dmatx);
-}
-
-/**
- * @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) {
-
- dmaStreamSetMemory0(spip->dmarx, &dummyrx);
- dmaStreamSetTransactionSize(spip->dmarx, n);
- dmaStreamSetMode(spip->dmarx, spip->rxdmamode);
-
- dmaStreamSetMemory0(spip->dmatx, txbuf);
- dmaStreamSetTransactionSize(spip->dmatx, n);
- dmaStreamSetMode(spip->dmatx, spip->txdmamode | STM32_DMA_CR_MINC);
-
- dmaStreamEnable(spip->dmarx);
- dmaStreamEnable(spip->dmatx);
-}
-
-/**
- * @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) {
-
- dmaStreamSetMemory0(spip->dmarx, rxbuf);
- dmaStreamSetTransactionSize(spip->dmarx, n);
- dmaStreamSetMode(spip->dmarx, spip->rxdmamode | STM32_DMA_CR_MINC);
-
- dmaStreamSetMemory0(spip->dmatx, &dummytx);
- dmaStreamSetTransactionSize(spip->dmatx, n);
- dmaStreamSetMode(spip->dmatx, spip->txdmamode);
-
- dmaStreamEnable(spip->dmarx);
- dmaStreamEnable(spip->dmatx);
-}
-
-/**
- * @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.
- */
-uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame) {
-
- spip->spi->DR = frame;
- while ((spip->spi->SR & SPI_SR_RXNE) == 0)
- ;
- return spip->spi->DR;
-}
-
-#endif /* HAL_USE_SPI */
-
-/** @} */
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