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Add driver for LM-75 temperature sensor

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3947 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2011-09-10 16:20:09 +00:00
parent 5b27f168d1
commit 3a3c6f31fd
1 changed files with 42 additions and 39 deletions
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81
arch/arm/src/stm32/stm32_i2c.c
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@ -934,41 +934,55 @@ int stm32_i2c_process(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs, int
/* Check for error status conditions */
if (status & I2C_SR1_BERR)
if ((status & I2C_SR1_ERRORMASK) != 0)
{
/* Bus Error */
if (status & I2C_SR1_BERR)
{
/* Bus Error */
status_errno = EIO;
}
else if (status & I2C_SR1_ARLO)
{
/* Arbitration Lost (master mode) */
status_errno = EIO;
}
else if (status & I2C_SR1_ARLO)
{
/* Arbitration Lost (master mode) */
status_errno = EAGAIN;
}
else if (status & I2C_SR1_AF)
{
/* Acknowledge Failure */
status_errno = EAGAIN;
}
else if (status & I2C_SR1_AF)
{
/* Acknowledge Failure */
status_errno = ENXIO;
}
else if (status & I2C_SR1_OVR)
{
/* Overrun/Underrun */
status_errno = ENXIO;
}
else if (status & I2C_SR1_OVR)
{
/* Overrun/Underrun */
status_errno = EIO;
}
else if (status & I2C_SR1_PECERR)
{
/* PEC Error in reception */
status_errno = EIO;
}
else if (status & I2C_SR1_PECERR)
{
/* PEC Error in reception */
status_errno = EPROTO;
}
else if (status & I2C_SR1_TIMEOUT)
{
/* Timeout or Tlow Error */
status_errno = EPROTO;
}
else if (status & I2C_SR1_TIMEOUT)
{
/* Timeout or Tlow Error */
status_errno = ETIME;
status_errno = ETIME;
}
/* This is not an error and should never happen since SMBus is not enabled */
else if (status & I2C_SR1_SMBALERT)
{
/* SMBus alert is an optional signal with an interrupt line for devices
* that want to trade their ability to master for a pin.
*/
status_errno = EINTR;
}
}
/* This is not an error, but should not happen. The BUSY signal can hang,
@ -982,17 +996,6 @@ int stm32_i2c_process(FAR struct i2c_dev_s *dev, FAR struct i2c_msg_s *msgs, int
status_errno = EBUSY;
}
/* This is not an error and should never happen since SMBus is not enabled */
else if (status & I2C_SR1_SMBALERT)
{
/* SMBus alert is an optional signal with an interrupt line for devices
* that want to trade their ability to master for a pin.
*/
status_errno = EINTR;
}
/* Re-enable the FSMC */
stm32_i2c_enablefsmc(ahbenr);