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Avoid reinitializing a SPI bus once it's been set up the first time.

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This commit is contained in:
px4dev
2012-08-13 23:56:52 -07:00
parent 165105bd93
commit 91d1524837
1 changed files with 36 additions and 18 deletions
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nuttx/arch/arm/src/stm32/stm32_spi.c
+36 -18
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@@ -1368,15 +1368,21 @@ FAR struct spi_dev_s *up_spiinitialize(int port)
priv = &g_spi1dev;
/* Configure SPI1 pins: SCK, MISO, and MOSI */
/* Only configure if the port is not already configured */
stm32_configgpio(GPIO_SPI1_SCK);
stm32_configgpio(GPIO_SPI1_MISO);
stm32_configgpio(GPIO_SPI1_MOSI);
if (!(spi_getreg(priv, STM32_SPI_CR1_OFFSET) & SPI_CR1_SPE))
{
/* Set up default configuration: Master, 8-bit, etc. */
/* Configure SPI1 pins: SCK, MISO, and MOSI */
spi_portinitialize(priv);
stm32_configgpio(GPIO_SPI1_SCK);
stm32_configgpio(GPIO_SPI1_MISO);
stm32_configgpio(GPIO_SPI1_MOSI);
/* Set up default configuration: Master, 8-bit, etc. */
spi_portinitialize(priv);
}
}
else
#endif
@@ -1387,15 +1393,21 @@ FAR struct spi_dev_s *up_spiinitialize(int port)
priv = &g_spi2dev;
/* Configure SPI2 pins: SCK, MISO, and MOSI */
/* Only configure if the port is not already configured */
stm32_configgpio(GPIO_SPI2_SCK);
stm32_configgpio(GPIO_SPI2_MISO);
stm32_configgpio(GPIO_SPI2_MOSI);
if (!(spi_getreg(priv, STM32_SPI_CR1_OFFSET) & SPI_CR1_SPE))
{
/* Set up default configuration: Master, 8-bit, etc. */
/* Configure SPI2 pins: SCK, MISO, and MOSI */
spi_portinitialize(priv);
stm32_configgpio(GPIO_SPI2_SCK);
stm32_configgpio(GPIO_SPI2_MISO);
stm32_configgpio(GPIO_SPI2_MOSI);
/* Set up default configuration: Master, 8-bit, etc. */
spi_portinitialize(priv);
}
}
else
#endif
@@ -1406,15 +1418,21 @@ FAR struct spi_dev_s *up_spiinitialize(int port)
priv = &g_spi3dev;
/* Configure SPI3 pins: SCK, MISO, and MOSI */
/* Only configure if the port is not already configured */
stm32_configgpio(GPIO_SPI3_SCK);
stm32_configgpio(GPIO_SPI3_MISO);
stm32_configgpio(GPIO_SPI3_MOSI);
if (!(spi_getreg(priv, STM32_SPI_CR1_OFFSET) & SPI_CR1_SPE))
{
/* Set up default configuration: Master, 8-bit, etc. */
/* Configure SPI3 pins: SCK, MISO, and MOSI */
spi_portinitialize(priv);
stm32_configgpio(GPIO_SPI3_SCK);
stm32_configgpio(GPIO_SPI3_MISO);
stm32_configgpio(GPIO_SPI3_MOSI);
/* Set up default configuration: Master, 8-bit, etc. */
spi_portinitialize(priv);
}
}
#endif