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STM32 and STM32L4: Enabling DMA loses other bits in CR2

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This commit is contained in:
Gregory Nutt
2016-08-13 08:01:41 -06:00
parent efc9f674d2
commit 42202c6365
2 changed files with 4 additions and 3 deletions
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arch/arm/src/stm32/stm32_spi.c
+1 -1
View File
@@ -1637,7 +1637,7 @@ static void spi_bus_initialize(FAR struct stm32_spidev_s *priv)
priv->txdma = stm32_dmachannel(priv->txch);
DEBUGASSERT(priv->rxdma && priv->txdma);
spi_putreg(priv, STM32_SPI_CR2_OFFSET, SPI_CR2_RXDMAEN | SPI_CR2_TXDMAEN);
spi_modifycr2(priv, SPI_CR2_RXDMAEN | SPI_CR2_TXDMAEN, 0);
#endif
/* Enable spi */
arch/arm/src/stm32l4/stm32l4_spi.c
+3 -2
View File
@@ -840,7 +840,8 @@ static inline void spi_dmatxstart(FAR struct stm32l4_spidev_s *priv)
*
************************************************************************************/
static void spi_modifycr(uint32_t addr, FAR struct stm32l4_spidev_s *priv, uint16_t setbits, uint16_t clrbits)
static void spi_modifycr(uint32_t addr, FAR struct stm32l4_spidev_s *priv,
uint16_t setbits, uint16_t clrbits)
{
uint16_t cr;
@@ -1533,7 +1534,7 @@ static void spi_bus_initialize(FAR struct stm32l4_spidev_s *priv)
priv->txdma = stm32l4_dmachannel(priv->txch);
DEBUGASSERT(priv->rxdma && priv->txdma);
spi_putreg(priv, STM32L4_SPI_CR2_OFFSET, SPI_CR2_RXDMAEN | SPI_CR2_TXDMAEN);
spi_modifycr(STM32L4_SPI_CR2_OFFSET, priv, SPI_CR2_RXDMAEN | SPI_CR2_TXDMAEN, 0);
#endif
/* Enable spi */