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arch/arm/src/lpc43xx: Add I2C stop logic.

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This commit is contained in:
Gregory Nutt
2017-12-14 18:06:40 -06:00
parent c50b4f5504
commit eed14e5eb1
2 changed files with 61 additions and 9 deletions
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arch/arm/src/lpc54xx/lpc54_i2c_master.c
+35 -7
View File
@@ -166,7 +166,7 @@ static struct lpc54_i2cdev_s g_i2c9_dev;
* Name: lpc54_i2c_putreg
*
* Description:
* Set the frequency for the next transfer
* Write a value to a register at the offset from the Flexcomm base.
*
****************************************************************************/
@@ -177,19 +177,46 @@ static inline void lpc54_i2c_putreg(struct lpc54_i2cdev_s *priv,
}
/****************************************************************************
* Name: lpc54_i2c_gettreg
* Name: lpc54_i2c_getreg
*
* Description:
* Set the frequency for the next transfer
* Read the content of a register at the offset from the Flexcomm base.
*
****************************************************************************/
static inline void lpc54_i2c_gettreg(struct lpc54_i2cdev_s *priv,
unsigned int regoffset)
static inline void lpc54_i2c_getreg(struct lpc54_i2cdev_s *priv,
unsigned int regoffset)
{
return getreg32(priv->base + regoffset);
}
/****************************************************************************
* Name: lpc54_wait_pendingstatus
*
* Description:
* Wait for status update to complete and clear the I2C state.
*
****************************************************************************/
static uint32_t lpc54_wait_pendingstatus(struct lpc54_i2cdev_s *priv)
{
uint32_t regval;
/* Wait until status is no longer pending */
do
{
regval = lpc54_i2c_getreg(priv, LPC54_I2C_STAT_OFFSET);
}
while ((regval & I2C_INT_MSTPENDING) == 0);
/* Clear controller state and return the last status */
lpc43_i2c_putreg(priv, LPC54_I2C_STAT_OFFSET,
(I2C_STAT_MSTARBLOSS_MASK | I2C_STAT_MSTSTSTPERR_MASK));
return regval;
}
/****************************************************************************
* Name: lpc54_i2c_setfrequency
*
@@ -263,7 +290,7 @@ static void lpc54_i2c_setfrequency(struct lpc54_i2cdev_s *priv,
regval = I2C_CLKDIV(best_div);
lpc54_i2c_putreg(priv, LPC54_I2C_CLKDIV_OFFSET, regval);
regval = I2C_MSTTIME_SCLLOW(n) | I2C_MSTTIME_SCLHIGH(n);
regval = I2C_MSTTIME_SCLLOW(best_scl) | I2C_MSTTIME_SCLHIGH(best_scl);
lpc54_i2c_putreg(LPC54_I2C_MSTTIME_OFFSET, regval);
priv->frequency = frequency;
@@ -312,7 +339,8 @@ static int lpc54_i2c_start(struct lpc54_i2cdev_s *priv)
static void lpc54_i2c_stop(struct lpc54_i2cdev_s *priv)
{
#warning Missing logic
(void)lpc54_wait_pendingstatus(priv);
lpc54_i2c_putreg(pric, LPC54_I2C_MSTCTL_OFFSET, I2C_MSTCTL_MSTSTOP);
nxsem_post(&priv->waitsem);
}
arch/arm/src/lpc54xx/lpc54_spi_master.c
+26 -2
View File
@@ -182,13 +182,37 @@ static struct lpc54_spidev_s g_spi9_dev;
#endif
/****************************************************************************
* Public Data
* Private Functions
****************************************************************************/
/****************************************************************************
* Private Functions
* Name: lpc54_spi_putreg
*
* Description:
* Write a value to a register at the offset from the Flexcomm base.
*
****************************************************************************/
static inline void lpc54_spi_putreg(struct lpc54_spidev_s *priv,
unsigned int regoffset, uint32_t regval)
{
putreg32(value, priv->base + regoffset);
}
/****************************************************************************
* Name: lpc54_spi_gettreg
*
* Description:
* Read the content of a register at the offset from the Flexcomm base.
*
****************************************************************************/
static inline void lpc54_spi_gettreg(struct lpc54_spidev_s *priv,
unsigned int regoffset)
{
return getreg32(priv->base + regoffset);
}
/****************************************************************************
* Name: lpc54_spi_16bitmode
*