Aksal/nuttx
3
1
Fork 1
mirror of https://github.com/apache/nuttx.git synced 2026-08-31 14:13:04 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 3

Merged in extent3d/nuttx (pull request #575)

Browse source 
SAMDL: SPI must be disabled before changing the mode bits in CTRLA register

* SAMD External Interrupt Controller (EIC) support

* removed comment

* SAMDL: SPI must be disabled before changing the mode bits in CTRLA register

Approved-by: Gregory Nutt <gnutt@nuttx.org>
This commit is contained in:
Matt Thompson 2018-01-18 12:33:41 +00:00 • committed by Gregory Nutt
parent 0184f8818a
commit 1ec8a6f34c
1 changed files with 6 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

7
arch/arm/src/samdl/sam_spi.c
View file

@ -944,7 +944,12 @@ static void spi_setmode(struct spi_dev_s *dev, enum spi_mode_e mode)
{
/* Yes... Set the mode appropriately */
/* First we need to disable SPI while we change the mode */
regval = spi_getreg32(priv, SAM_SPI_CTRLA_OFFSET);
spi_putreg32(priv, regval & ~SPI_CTRLA_ENABLE, SAM_SPI_CTRLA_OFFSET);
spi_wait_synchronization(priv);
regval &= ~(SPI_CTRLA_CPOL | SPI_CTRLA_CPHA);
switch (mode)
@ -969,7 +974,7 @@ static void spi_setmode(struct spi_dev_s *dev, enum spi_mode_e mode)
return;
}
spi_putreg32(priv, regval, SAM_SPI_CTRLA_OFFSET);
spi_putreg32(priv, regval | SPI_CTRLA_ENABLE, SAM_SPI_CTRLA_OFFSET);
/* Save the mode so that subsequent re-configurations will be faster */