git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3170 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 0 insertions, 428 deletions

diff --git a/os/hal/platforms/STM32/spi_lld.c b/os/hal/platforms/STM32/spi_lld.c
deleted file mode 100644
index d8ae657a7..000000000
--- a/os/hal/platforms/STM32/spi_lld.c
+++ /dev/null
@@ -1,428 +0,0 @@
-/*

-    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,

-                 2011 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    STM32/spi_lld.c

- * @brief   STM32 SPI subsystem low level driver source.

- *

- * @addtogroup SPI

- * @{

- */

-

-#include "ch.h"

-#include "hal.h"

-

-#if HAL_USE_SPI || defined(__DOXYGEN__)

-

-/*===========================================================================*/

-/* 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

-

-/*===========================================================================*/

-/* Driver local variables.                                                   */

-/*===========================================================================*/

-

-static uint16_t dummytx;

-static uint16_t dummyrx;

-

-/*===========================================================================*/

-/* Driver local functions.                                                   */

-/*===========================================================================*/

-

-/**

- * @brief   Stops the SPI DMA channels.

- *

- * @param[in] spip      pointer to the @p SPIDriver object

- */

-#define dma_stop(spip) {                                                    \

-  dmaChannelDisable(spip->dmatx);                                           \

-  dmaChannelDisable(spip->dmarx);                                           \

-}

-

-/**

- * @brief   Starts the SPI DMA channels.

- *

- * @param[in] spip      pointer to the @p SPIDriver object

- */

-#define dma_start(spip) {                                                   \

-  dmaChannelEnable((spip)->dmarx);                                          \

-  dmaChannelEnable((spip)->dmatx);                                          \

-}

-

-/**

- * @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 & DMA_ISR_TEIF1) != 0) {

-    STM32_SPI_DMA_ERROR_HOOK(spip);

-  }

-#else

-  (void)flags;

-#endif

-

-  /* Stop everything.*/

-  dma_stop(spip);

-

-  /* 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 & DMA_ISR_TEIF1) != 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) {

-

-  dummytx = 0xFFFF;

-

-#if STM32_SPI_USE_SPI1

-  spiObjectInit(&SPID1);

-  SPID1.thread  = NULL;

-  SPID1.spi     = SPI1;

-  SPID1.dmarx   = STM32_DMA1_CH2;

-  SPID1.dmatx   = STM32_DMA1_CH3;

-#endif

-

-#if STM32_SPI_USE_SPI2

-  spiObjectInit(&SPID2);

-  SPID2.thread  = NULL;

-  SPID2.spi     = SPI2;

-  SPID2.dmarx   = STM32_DMA1_CH4;

-  SPID2.dmatx   = STM32_DMA1_CH5;

-#endif

-

-#if STM32_SPI_USE_SPI3

-  spiObjectInit(&SPID3);

-  SPID3.thread  = NULL;

-  SPID3.spi     = SPI3;

-  SPID3.dmarx   = STM32_DMA2_CH1;

-  SPID3.dmatx   = STM32_DMA2_CH2;

-#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) {

-      /* Note, the DMA must be enabled before the IRQs.*/

-      dmaAllocate(STM32_DMA1_ID, STM32_DMA_CHANNEL_2,

-                  (stm32_dmaisr_t)spi_lld_serve_rx_interrupt, (void *)spip);

-      dmaAllocate(STM32_DMA1_ID, STM32_DMA_CHANNEL_3,

-                  (stm32_dmaisr_t)spi_lld_serve_tx_interrupt, (void *)spip);

-      NVICEnableVector(DMA1_Channel2_IRQn,

-                       CORTEX_PRIORITY_MASK(STM32_SPI_SPI1_IRQ_PRIORITY));

-      NVICEnableVector(DMA1_Channel3_IRQn,

-                       CORTEX_PRIORITY_MASK(STM32_SPI_SPI1_IRQ_PRIORITY));

-      RCC->APB2ENR |= RCC_APB2ENR_SPI1EN;

-    }

-#endif

-#if STM32_SPI_USE_SPI2

-    if (&SPID2 == spip) {

-      /* Note, the DMA must be enabled before the IRQs.*/

-      dmaAllocate(STM32_DMA1_ID, STM32_DMA_CHANNEL_4,

-                  (stm32_dmaisr_t)spi_lld_serve_rx_interrupt, (void *)spip);

-      dmaAllocate(STM32_DMA1_ID, STM32_DMA_CHANNEL_5,

-                  (stm32_dmaisr_t)spi_lld_serve_tx_interrupt, (void *)spip);

-      NVICEnableVector(DMA1_Channel4_IRQn,

-                       CORTEX_PRIORITY_MASK(STM32_SPI_SPI2_IRQ_PRIORITY));

-      NVICEnableVector(DMA1_Channel5_IRQn,

-                       CORTEX_PRIORITY_MASK(STM32_SPI_SPI2_IRQ_PRIORITY));

-      RCC->APB1ENR |= RCC_APB1ENR_SPI2EN;

-    }

-#endif

-#if STM32_SPI_USE_SPI3

-    if (&SPID3 == spip) {

-      /* Note, the DMA must be enabled before the IRQs.*/

-      dmaAllocate(STM32_DMA2_ID, STM32_DMA_CHANNEL_1,

-                  (stm32_dmaisr_t)spi_lld_serve_rx_interrupt, (void *)spip);

-      dmaAllocate(STM32_DMA2_ID, STM32_DMA_CHANNEL_2,

-                  (stm32_dmaisr_t)spi_lld_serve_tx_interrupt, (void *)spip);

-      NVICEnableVector(DMA2_Channel1_IRQn,

-                       CORTEX_PRIORITY_MASK(STM32_SPI_SPI3_IRQ_PRIORITY));

-      NVICEnableVector(DMA2_Channel2_IRQn,

-                       CORTEX_PRIORITY_MASK(STM32_SPI_SPI3_IRQ_PRIORITY));

-      RCC->APB1ENR |= RCC_APB1ENR_SPI3EN;

-    }

-#endif

-

-    /* DMA setup.*/

-    dmaChannelSetPeripheral(spip->dmarx, &spip->spi->DR);

-    dmaChannelSetPeripheral(spip->dmatx, &spip->spi->DR);

-  }

-

-  /* More DMA setup.*/

-  if ((spip->config->cr1 & SPI_CR1_DFF) == 0)

-    spip->dmaccr = (STM32_SPI_SPI2_DMA_PRIORITY << 12) |

-                    DMA_CCR1_TEIE;                  /* 8 bits transfers.    */

-  else

-    spip->dmaccr = (STM32_SPI_SPI2_DMA_PRIORITY << 12) |

-                    DMA_CCR1_TEIE | DMA_CCR1_MSIZE_0 |

-                    DMA_CCR1_PSIZE_0;               /* 16 bits transfers.   */

-

-  /* 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;

-

-#if STM32_SPI_USE_SPI1

-    if (&SPID1 == spip) {

-      NVICDisableVector(DMA1_Channel2_IRQn);

-      NVICDisableVector(DMA1_Channel3_IRQn);

-      dmaRelease(STM32_DMA1_ID, STM32_DMA_CHANNEL_2);

-      dmaRelease(STM32_DMA1_ID, STM32_DMA_CHANNEL_3);

-      RCC->APB2ENR &= ~RCC_APB2ENR_SPI1EN;

-    }

-#endif

-#if STM32_SPI_USE_SPI2

-    if (&SPID2 == spip) {

-      NVICDisableVector(DMA1_Channel4_IRQn);

-      NVICDisableVector(DMA1_Channel5_IRQn);

-      dmaRelease(STM32_DMA1_ID, STM32_DMA_CHANNEL_4);

-      dmaRelease(STM32_DMA1_ID, STM32_DMA_CHANNEL_5);

-      RCC->APB1ENR &= ~RCC_APB1ENR_SPI2EN;

-    }

-#endif

-#if STM32_SPI_USE_SPI3

-    if (&SPID3 == spip) {

-      NVICDisableVector(DMA2_Channel1_IRQn);

-      NVICDisableVector(DMA2_Channel2_IRQn);

-      dmaRelease(STM32_DMA2_ID, STM32_DMA_CHANNEL_1);

-      dmaRelease(STM32_DMA2_ID, STM32_DMA_CHANNEL_2);

-      RCC->APB1ENR &= ~RCC_APB1ENR_SPI3EN;

-    }

-#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) {

-

-  dmaChannelSetup(spip->dmarx, n, &dummyrx,

-                  spip->dmaccr | DMA_CCR1_TCIE | DMA_CCR1_EN);

-  dmaChannelSetup(spip->dmatx, n, &dummytx,

-                  spip->dmaccr | DMA_CCR1_DIR | DMA_CCR1_EN);

-}

-

-/**

- * @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) {

-

-  dmaChannelSetup(spip->dmarx, n, rxbuf,

-                  spip->dmaccr | DMA_CCR1_TCIE | DMA_CCR1_MINC |

-                  DMA_CCR1_EN);

-  dmaChannelSetup(spip->dmatx, n, txbuf,

-                  spip->dmaccr | DMA_CCR1_DIR | DMA_CCR1_MINC |

-                  DMA_CCR1_EN);

-}

-

-/**

- * @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) {

-

-  dmaChannelSetup(spip->dmarx, n, &dummyrx,

-                  spip->dmaccr | DMA_CCR1_TCIE | DMA_CCR1_EN);

-  dmaChannelSetup(spip->dmatx, n, txbuf,

-                  spip->dmaccr | DMA_CCR1_DIR | DMA_CCR1_MINC |

-                  DMA_CCR1_EN);

-}

-

-/**

- * @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) {

-

-  dmaChannelSetup(spip->dmarx, n, rxbuf,

-                  spip->dmaccr | DMA_CCR1_TCIE | DMA_CCR1_MINC |

-                  DMA_CCR1_EN);

-  dmaChannelSetup(spip->dmatx, n, &dummytx,

-                  spip->dmaccr | DMA_CCR1_DIR | DMA_CCR1_EN);

-}

-

-/**

- * @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 */

-

-/** @} */