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ChibiOS
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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1253 35acf78f-673a-0410-8e92-d51de3d6d3f4

This commit is contained in:
gdisirio 2009-10-24 18:25:31 +00:00
parent 2169906729
commit 81f043865e
3 changed files with 89 additions and 12 deletions
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41
os/io/platforms/STM32/spi_lld.c
View File

@ -40,6 +40,36 @@ SPIDriver SPID1;
SPIDriver SPID2;
#endif
/*===========================================================================*/
/* Low Level Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Low Level Driver interrupt handlers. */
/*===========================================================================*/
#if USE_STM32_SPI1 || defined(__DOXYGEN__)
CH_IRQ_HANDLER(Vector70) {
CH_IRQ_PROLOGUE();
CH_IRQ_EPILOGUE();
}
#endif
#if USE_STM32_SPI2 || defined(__DOXYGEN__)
CH_IRQ_HANDLER(Vector78) {
CH_IRQ_PROLOGUE();
CH_IRQ_EPILOGUE();
}
#endif
/*===========================================================================*/
/* Low Level Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level SPI driver initialization.
*/
@ -50,6 +80,7 @@ void spi_lld_init(void) {
SPID1.spd_spi = SPI1;
SPID1.spd_dmarx = DMA1_Channel2;
SPID1.spd_dmatx = DMA1_Channel3;
SPID1.spd_dmaprio = SPI1_DMA_PRIORITY << 12;
RCC->APB2ENR |= RCC_APB2ENR_SPI1EN;
GPIOA->CRH = (GPIOA->CRH & 0x000FFFFF) | 0xB4B00000;
#endif
@ -59,6 +90,7 @@ void spi_lld_init(void) {
SPID2.spd_spi = SPI2;
SPID2.spd_dmarx = DMA1_Channel4;
SPID2.spd_dmatx = DMA1_Channel5;
SPID2.spd_dmaprio = SPI2_DMA_PRIORITY << 12;
RCC->APB1ENR |= RCC_APB1ENR_SPI2EN;
GPIOB->CRL = (GPIOB->CRL & 0x000FFFFF) | 0xB4B00000;
#endif
@ -114,6 +146,15 @@ void spi_lld_unselect(SPIDriver *spip) {
*/
void spi_lld_exchange(SPIDriver *spip, size_t n, void *rxbuf, void *txbuf) {
/*
* DMA setup.
*/
spip->spd_dmarx->CNDTR = (uint32_t)n;
spip->spd_dmarx->CPAR = (uint32_t)&spip->spd_spi->DR;
spip->spd_dmarx->CMAR = (uint32_t)rxbuf;
spip->spd_dmarx->CCR = spip->spd_dmaprio |
DMA_CCR1_MSIZE_0 | DMA_CCR1_MSIZE_0 |
DMA_CCR1_MINC | DMA_CCR1_TEIE | DMA_CCR1_TCIE;
}
/** @} */

36
os/io/platforms/STM32/spi_lld.h
View File

@ -41,7 +41,7 @@
/**
* @brief SPI1 driver enable switch.
* @details If set to @p TRUE the support for SPI is included.
* @details If set to @p TRUE the support for SPI1 is included.
* @note The default is @p TRUE.
*/
#if !defined(USE_STM32_SPI1) || defined(__DOXYGEN__)
@ -49,14 +49,34 @@
#endif
/**
* @brief SPI1 driver enable switch.
* @details If set to @p TRUE the support for SPI is included.
* @brief SPI2 driver enable switch.
* @details If set to @p TRUE the support for SPI2 is included.
* @note The default is @p TRUE.
*/
#if !defined(USE_STM32_SPI2) || defined(__DOXYGEN__)
#define USE_STM32_SPI2 TRUE
#endif
/**
* @brief SPI1 DMA priority (0..3).
* @note The priority level is used for both the TX and RX DMA channels but
* because of the channels ordering the RX channel has always priority
* over the TX channel.
*/
#if !defined(SPI1_DMA_PRIORITY) || defined(__DOXYGEN__)
#define SPI1_DMA_PRIORITY 2
#endif
/**
* @brief SPI2 DMA priority (0..3).
* @note The priority level is used for both the TX and RX DMA channels but
* because of the channels ordering the RX channel has always priority
* over the TX channel.
*/
#if !defined(SPI2_DMA_PRIORITY) || defined(__DOXYGEN__)
#define SPI2_DMA_PRIORITY 2
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
@ -65,9 +85,9 @@
* @brief Driver state machine possible states.
*/
typedef enum {
SPI_UNINIT = 0,
SPI_IDLE = 1,
SPI_ACTIVE = 2
SPI_UNINIT = 0,//!< SPI_UNINIT
SPI_IDLE = 1, //!< SPI_IDLE
SPI_ACTIVE = 2 //!< SPI_ACTIVE
} spistate_t;
/**
@ -128,6 +148,10 @@ typedef struct {
* @brief Pointer to the transmit DMA channel registers block.
*/
DMA_Channel_TypeDef *spd_dmatx;
/**
* @brief DMA priority bit mask.
*/
uint32_t spd_dmaprio;
} SPIDriver;
/*===========================================================================*/

12
os/io/templates/spi_lld.c
View File

@ -27,6 +27,18 @@
#include <ch.h>
#include <spi.h>
/*===========================================================================*/
/* Low Level Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Low Level Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Low Level Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level SPI driver initialization.
*/