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Add I2C_M_NOSTART and I2C_M_NOSTOP support in esp32c3_i2c

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Signed-off-by: AuroraRAS <chplee@gmail.com>
This commit is contained in:
AuroraRAS 2022-06-18 19:40:06 +08:00 committed by Alan Carvalho de Assis
parent 6cb77a8d84
commit 0fe219a8c9
1 changed files with 31 additions and 5 deletions
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36
arch/risc-v/src/esp32c3/esp32c3_i2c.c
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@ -1037,14 +1037,34 @@ static int esp32c3_i2c_transfer(struct i2c_master_s *dev,
esp32c3_i2c_init_clock(priv, msgs[i].frequency);
/* Reset I2C trace logic */
#ifndef CONFIG_I2C_POLLED
if ((msgs[i].flags & I2C_M_NOSTART) != 0)
{
esp32c3_i2c_traceevent(priv, I2CEVENT_SENDBYTE, priv->bytes,
getreg32(I2C_SR_REG(priv->id)));
esp32c3_i2c_senddata(priv);
esp32c3_i2c_tracereset(priv);
if (priv->bytes == msgs[i].length)
{
priv->i2cstate = I2CSTATE_STOP;
if ((msgs[i].flags & I2C_M_NOSTOP) != 0)
{
priv->i2cstate = I2CSTATE_FINISH;
}
}
}
else
#endif
{
/* Reset I2C trace logic */
esp32c3_i2c_traceevent(priv, I2CEVENT_SENDADDR, msgs[i].addr,
getreg32(I2C_SR_REG(priv->id)));
esp32c3_i2c_tracereset(priv);
esp32c3_i2c_sendstart(priv);
esp32c3_i2c_traceevent(priv, I2CEVENT_SENDADDR, msgs[i].addr,
getreg32(I2C_SR_REG(priv->id)));
esp32c3_i2c_sendstart(priv);
}
#ifndef CONFIG_I2C_POLLED
if (esp32c3_i2c_sem_waitdone(priv) < 0)
@ -1454,6 +1474,12 @@ static inline void esp32c3_i2c_process(struct esp32c3_i2c_priv_s *priv,
if (priv->bytes == msg->length)
{
priv->i2cstate = I2CSTATE_STOP;
#ifndef CONFIG_I2C_POLLED
if ((msg->flags & I2C_M_NOSTOP) != 0)
{
priv->i2cstate = I2CSTATE_FINISH;
}
#endif
}
}
}