Fixed BIDIMODE-related changes in SPI drivers.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9030 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 25 insertions, 14 deletions

diff --git a/os/hal/ports/STM32/LLD/SPIv1/spi_lld.c b/os/hal/ports/STM32/LLD/SPIv1/spi_lld.c
index cd993920b..a371eb980 100644
--- a/os/hal/ports/STM32/LLD/SPIv1/spi_lld.c
+++ b/os/hal/ports/STM32/LLD/SPIv1/spi_lld.c
@@ -116,7 +116,8 @@ SPIDriver SPID6;
 /* Driver local variables and types.                                         */

 /*===========================================================================*/

 

-static uint16_t dummytx;

+static const uint16_t dummytx = 0xFFFFU;

+static uint16_t dummyrx;

 

 /*===========================================================================*/

 /* Driver local functions.                                                   */

@@ -145,11 +146,12 @@ static void spi_lld_serve_rx_interrupt(SPIDriver *spip, uint32_t flags) {
 

 #if STM32_SPI_USE_BIDIMODE

   spip->spi->CR1 |= SPI_CR1_BIDIOE;

-#endif

 

-  /* Errors reset sequence.*/

+  /* Errors reset sequence. It is required becaue BIDIOE could cause extra

+     clock pulses after DMA stopped reading.*/

   (void)spip->spi->DR;

   (void)spip->spi->SR;

+#endif

 

   /* Portable SPI ISR code defined in the high level driver, note, it is

      a macro.*/

@@ -191,8 +193,6 @@ static void spi_lld_serve_tx_interrupt(SPIDriver *spip, uint32_t flags) {
  */

 void spi_lld_init(void) {

 

-  dummytx = 0xFFFF;

-

 #if STM32_SPI_USE_SPI1

   spiObjectInit(&SPID1);

   SPID1.spi       = SPI1;

@@ -531,12 +531,18 @@ void spi_lld_ignore(SPIDriver *spip, size_t n) {
   if ((spip->spi->CR1 & SPI_CR1_BIDIMODE) != 0) {

     osalDbgAssert((spip->spi->CR1 & SPI_CR1_BIDIOE) != 0,

                   "BIDIOE not set");

+  }

 #endif

 

+  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);

 }

 

@@ -594,13 +600,19 @@ void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf) {
   if ((spip->spi->CR1 & SPI_CR1_BIDIMODE) != 0) {

     osalDbgAssert((spip->spi->CR1 & SPI_CR1_BIDIOE) != 0,

                   "BIDIOE not set");

+  }

 #endif

 

-  dmaStreamSetMemory0(spip->dmatx, txbuf);

-  dmaStreamSetTransactionSize(spip->dmatx, n);

-  dmaStreamSetMode(spip->dmatx, spip->txdmamode | STM32_DMA_CR_MINC);

+    dmaStreamSetMemory0(spip->dmarx, &dummyrx);

+    dmaStreamSetTransactionSize(spip->dmarx, n);

+    dmaStreamSetMode(spip->dmarx, spip->rxdmamode);

 

-  dmaStreamEnable(spip->dmatx);

+    dmaStreamSetMemory0(spip->dmatx, txbuf);

+    dmaStreamSetTransactionSize(spip->dmatx, n);

+    dmaStreamSetMode(spip->dmatx, spip->txdmamode | STM32_DMA_CR_MINC);

+

+    dmaStreamEnable(spip->dmarx);

+    dmaStreamEnable(spip->dmatx);

 }

 

 /**

@@ -619,10 +631,11 @@ void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf) {
 void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf) {

 

 #if STM32_SPI_USE_BIDIMODE

-  osalDbgAssert((spip->spi->CR1 & SPI_CR1_BIDIOE) != 0,

-                "BIDIOE not set");

-

   if ((spip->spi->CR1 & SPI_CR1_BIDIMODE) != 0) {

+

+    osalDbgAssert((spip->spi->CR1 & SPI_CR1_BIDIOE) != 0,

+                  "BIDIOE not set");

+

     dmaStreamSetMemory0(spip->dmarx, rxbuf);

     dmaStreamSetTransactionSize(spip->dmarx, n);

     dmaStreamSetMode(spip->dmarx, spip->rxdmamode | STM32_DMA_CR_MINC);

@@ -666,8 +679,6 @@ uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame) {
 #if STM32_SPI_USE_BIDIMODE

   osalDbgAssert((spip->spi->CR1 & SPI_CR1_BIDIMODE) == 0,

                 "spiPolledExchange() not possible with BIDIMODE");

-  osalDbgAssert((spip->spi->CR1 & SPI_CR1_BIDIOE) != 0,

-                "BIDIOE not set");

 #endif

 

   spip->spi->DR = frame;